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How much can you undervolt your T61 gpu?

T60/T61 series specific matters only
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zoltan87
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How much can you undervolt your T61 gpu?

#1 Post by zoltan87 » Wed Mar 27, 2019 8:45 pm

I have been using my T60 (with Ati X1400) as my main machine for more than two years now. Unfortunately recently I have encountered a major headache with a software that I started using for my hobby/business projects.

I recently got into 3D printing, and the mentioned software that I use a lot is Slic3r PE, it's a slicer software for 3D printing. And annoyingly I just can't run it on my T60. There are no error messages, absolutely nothing, it will just not open (if anyone happen to have any suggestions here, I would be forever grateful).

Luckily I have a Frankenpad build, that I have been keeping as a spare unit for the future. And after installation I managed to run this software just fine on this Frankenpad (Nvidia nv140 gpu). To my surprise though it turned out, that my 0,95V gpu BIOS undervolt mod is not 100% stable while I use this slicer software with large objects, displaying the layers. If there are too many layers and pathways to be displayed, my display driver will crash, the program closes, then the laptop recovers most of the time (although once I managed to completely lock up the system this way).

I remember when I built my frankenpad, first I used the 0.9V gpu modded BIOS file, and even though the system was able to boot and start windows, as soon as I opened a video in VLC player, the system crashed. So I went up to the 0.95V gpu BIOS version, did some stress tests, and everything seemed to be ok. I could watch Youtube, run games, run Blender, Solidworks (CAD program), they all worked fine. But this Slic3r slicer software turned out to be too much.

So I am going to go up to 1 Volt on the gpu, as I am certain that will solve these crashes.

But this "incident" made me curious. How many of you guys have experience with these undervolted BIOS files on your T61/ Frankenpad builds? What voltages do you use, that are still stable for you, and how heavy your user scenario is on the gpu? Is my experience common, or do I have a slightly below average graphics chip in my system, that's not very tolerant of undervoling?
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Re: How much can you undervolt your T61 gpu?

#2 Post by Thinkpad4by3 » Wed Mar 27, 2019 10:17 pm

zoltan87 wrote:
Wed Mar 27, 2019 8:45 pm
I recently got into 3D printing, and the mentioned software that I use a lot is Slic3r PE, it's a slicer software for 3D printing. And annoyingly I just can't run it on my T60. There are no error messages, absolutely nothing, it will just not open (if anyone happen to have any suggestions here, I would be forever grateful).
OT, but which printer did you get? Guessing from the fact that you are using Slic3r PE, a Prusa machine. If it is, or whatever it is, congrats on joining the 3d printing club. You will be soon to learn Prusa's are the TP of the 3D printing world...if that is the machine you have.
zoltan87 wrote:
Wed Mar 27, 2019 8:45 pm
But this "incident" made me curious. How many of you guys have experience with these undervolted BIOS files on your T61/ Frankenpad builds? What voltages do you use, that are still stable for you, and how heavy your user scenario is on the gpu? Is my experience common, or do I have a slightly below average graphics chip in my system, that's not very tolerant of undervoling?
My T60p runs at 0V....it doesn't get much usage :lol: .
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

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Re: How much can you undervolt your T61 gpu?

#3 Post by zoltan87 » Thu Mar 28, 2019 4:37 am

Thinkpad4by3 wrote:
Wed Mar 27, 2019 10:17 pm
OT, but which printer did you get? Guessing from the fact that you are using Slic3r PE, a Prusa machine. If it is, or whatever it is, congrats on joining the 3d printing club. You will be soon to learn Prusa's are the TP of the 3D printing world...if that is the machine you have.
Yes I got a Prusa i3 mk3 indeed and I am hugely impressed with the machine overall. Was reading up on them quite a lot, originally I was looking at cheaper machines, but I settled on the Prusa as it's a well known machine with a huge community, if something doesn't work there is always someone to ask. I just didn't feel like taking the risk and spend days (weeks?) troubleshooting a cheaper machine.

Shame about your T60 not getting any attention any more, but I must admit it's performance is indeed just not enough any more for more heavy use scenarios. Although it copes with Solidworks surprisingly well, at least with not very large and intricate objects.
Laptops after the 4:3 aspect ratio era are non-existent to me.

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Re: How much can you undervolt your T61 gpu?

#4 Post by Screamer » Thu Mar 28, 2019 5:01 am

My old 15.4" R61i with a NVIDIA T61 motherboard (Quadro NVS 140M), had stability problems with anything at or below 1V; I could clearly recall that it froze after an hour of running FurMark with a voltage of 0.95V. When I ran it with 1V, my R61i would still freeze within an improved time frame of about 3 hours or so.

A voltage of 1.05V, was the only setting that did not freeze the entire machine under 12 hours of FurMark. However, it removed any sort of overclocking headroom that I once had with the factory voltage setting. In my case, undervolting the Quadro NVS 140M did not do anything apart from reducing the temperatures by a measly amount.

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Re: How much can you undervolt your T61 gpu?

#5 Post by wujstefan » Thu Mar 28, 2019 8:42 am

0,95V for T61 15,4"; 1.00V for R61i (it failed anyway); 0,95V for 4:3 unit.

NONE for updated boards from TuuS - they do accept stable 0,95V (at least those I got), but leaving them at stock voltage allows them for a stable 50% overclock.

T61p 16:10 do not accept undervolting well, but they do accept overclocking up to 620Mhz on core. To virtualize: it allows to double the 3d mark 06 score when compared to non-overclocked 4:3 fx570m. (NOTE: 128Mb version for whatever reason can't work stably when overclocked; tested on 4 units from different batches).

EDIT:
Ah, one of the most signifficant: 4:# nerfed 128Mb fx570m chip allowed 1.1V
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Re: How much can you undervolt your T61 gpu?

#6 Post by Cigarguy » Thu Mar 28, 2019 10:50 am

Coming from an overclocking/underclocking background, no one can tell you what the voltage is for your particular system. The numbers that works for other people may not run stable on yours. At best it's only a target that may or may not work.

Do it the old fashion OC/UC way, set your voltage then stress test for stability. If stable go lower and keep going lower until it becomes unstable. At that point bump it back up to the last stable setting. Doing it this way will ensure it works for that particular chip in that particular system in your particular home/office. Even then some systems will only remain stable for a short period of time or it could remain stable forever.

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Re: How much can you undervolt your T61 gpu?

#7 Post by wujstefan » Fri Mar 29, 2019 7:09 am

This is completely correct, just as with CPU overclocking / undervolting :)

However, we may speak about tendencies. Nvs140m has a high chance of "undervoltability" from my experience with ~30-35 T61s.

EDIT: Awww I should read this thread a bit more carefully. Slic3r uses mostly CPU. Have you checked CPU for stability?
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Re: How much can you undervolt your T61 gpu?

#8 Post by zoltan87 » Fri Mar 29, 2019 5:48 pm

wujstefan wrote:
Fri Mar 29, 2019 7:09 am
EDIT: Awww I should read this thread a bit more carefully. Slic3r uses mostly CPU. Have you checked CPU for stability?
Hmmm, so maybe that's the issue. I have to do some more cpu stress test then. Although I still think it's the gpu, as I always get a "display driver failed then recovered" message and Slic3r closes. Once I had a complete freeze, but usually it's a display driver collapse problem. Not sure if the cpu could cause that. Either way, I will look into it.
Thanks everyone for the suggestions and comments.
Laptops after the 4:3 aspect ratio era are non-existent to me.

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Re: How much can you undervolt your T61 gpu?

#9 Post by wujstefan » Sat Mar 30, 2019 1:24 am

Another thing: DirectX and GPU drivers. nvs140m works better on 8400GT drivers. Install the directX if not present / updated by Windows only.
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Re: How much can you undervolt your T61 gpu?

#10 Post by SirionRazzer » Sat Mar 30, 2019 1:41 am

@wujstefan: Which software for OC'ing the fx570m and which drivers do you use? If only those were applicable to my HP8510w (Win10).

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Re: How much can you undervolt your T61 gpu?

#11 Post by wujstefan » Sat Mar 30, 2019 2:39 am

SirionRazzer wrote:
Sat Mar 30, 2019 1:41 am
@wujstefan: Which software for OC'ing the fx570m and which drivers do you use? If only those were applicable to my HP8510w (Win10).
They are. Fx570m uses GS8800 drivers well.

Lately I'm using MSI Afterburner - if this one, for whatever reason cannot control the clocks, I'm turning to less user-friendly but more compatible nVidia inspector. If this one fails as well, Riva Tune (but it needs lots of digging). If Riva is unable to control the clocks, I give up :)

It all should work just as fine on your HP. On the other hand, WHY the heck crappy HP8510 and not T61p (the direct counterpart, better in all and any way!)?
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Re: How much can you undervolt your T61 gpu?

#12 Post by Lister » Sat Mar 30, 2019 1:34 pm

All units with the nvs 140m graphics chip I undervolted to 0.95V witout ASPM stable. At lower voltage BSOD occurred. In the last time I have noticed the unstability of the graphics card driver. That's why I tried several different drivers. It is best to use the latest drivers from Lenovo 296.88 or drivers 327.02 downloaded from Windows update.
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Re: How much can you undervolt your T61 gpu?

#13 Post by Raidriar » Sun Mar 31, 2019 9:54 pm

15.4" T61p, 256MB FX 570M undervolted to 0.9V, ASPM enabled, driver 21.21.13.4201, build date July 2008. Remarkable improvement in temperature, it is no longer a blast furnace.
Thinkpads: 760XD, 600E, T23, T30, T43p, T61p
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Re: How much can you undervolt your T61 gpu?

#14 Post by zoltan87 » Mon Apr 01, 2019 3:58 pm

Raidriar wrote:
Sun Mar 31, 2019 9:54 pm
15.4" T61p, 256MB FX 570M undervolted to 0.9V, ASPM enabled, driver 21.21.13.4201, build date July 2008. Remarkable improvement in temperature, it is no longer a blast furnace.
Is it stable under heavy gpu load? Because 0.9V on a 570M is absolutely incredible, even just the fact that it's able to boot up on that voltage. You got extremely lucky with that unit that's for sure.
Laptops after the 4:3 aspect ratio era are non-existent to me.

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Re: How much can you undervolt your T61 gpu?

#15 Post by wujstefan » Mon Apr 01, 2019 5:01 pm

Well, that's cutting 8W off the GPU. If you succeeded that, you're super-lucky. Start betting for money.

Honestly, I've never had any T61p able to undervolt below 1.05V unless underclocked.
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Re: How much can you undervolt your T61 gpu?

#16 Post by Raidriar » Fri Apr 05, 2019 9:01 pm

wujstefan wrote:
Mon Apr 01, 2019 5:01 pm
Well, that's cutting 8W off the GPU. If you succeeded that, you're super-lucky. Start betting for money.

Honestly, I've never had any T61p able to undervolt below 1.05V unless underclocked.
Depends on your definition of stable. I am able to watch youtube video (keeping several open, maybe 7 tabs) and play 3d hardware accelerated games without problems. Very, very rarely I will get fuzzy lines on the screen (which I attribute to me overloading the GPU), which a reboot solves. But yes, it has been a very good chip, as later production models tend to be.
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Re: How much can you undervolt your T61 gpu?

#17 Post by DartMan68 » Tue Apr 30, 2019 2:43 pm

zoltan87 wrote:
Wed Mar 27, 2019 8:45 pm
But this "incident" made me curious. How many of you guys have experience with these undervolted BIOS files on your T61/ Frankenpad builds? What voltages do you use, that are still stable for you, and how heavy your user scenario is on the gpu? Is my experience common, or do I have a slightly below average graphics chip in my system, that's not very tolerant of undervoling?
T61p 15.4" 256MB nVidia FX570m. Undervolted and Overclocked with highsun's T61-BIOS(1.0)_ASPM_OC. nVidia 340.glx driver. Solus 4 Linux, 64bit. Build date May 2008. OC seems to be limited to 475/1404/950. Much better now overall. The fan doesn't come on nearly as often and it's a fair bit cooler on the bottom. I keep it elevated in the back with an old laptop hard drive as a prop. No problems with it yet. I play older games and have sometimes had as many as 27 tabs open in Firefox, switching back and forth between them with no noticeable lag.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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Re: How much can you undervolt your T61 gpu?

#18 Post by DartMan68 » Tue Apr 30, 2019 2:59 pm

wujstefan wrote:
Thu Mar 28, 2019 8:42 am
T61p 16:10 do not accept undervolting well, but they do accept overclocking up to 620Mhz on core. To virtualize: it allows to double the 3d mark 06 score when compared to non-overclocked 4:3 fx570m. (NOTE: 128Mb version for whatever reason can't work stably when overclocked; tested on 4 units from different batches).
Currently running highsun's T61-BIOS(1.0)_ASPM_OC on my T61p FX570m 256MB. OC seems to be limited to 475/1404/950. Seems perfectly stable in daily use. I haven't done any benching yet.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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Re: How much can you undervolt your T61 gpu?

#19 Post by wujstefan » Tue Apr 30, 2019 4:15 pm

Well it does make a difference if you load the chip.
I've been tinkering with it some time ago and it seems that fx570m does accept a great deal of overclock in general.
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Re: How much can you undervolt your T61 gpu?

#20 Post by DartMan68 » Sat May 04, 2019 5:13 pm

wujstefan wrote:
Tue Apr 30, 2019 4:15 pm
Well it does make a difference if you load the chip.
I've been tinkering with it some time ago and it seems that fx570m does accept a great deal of overclock in general.
Truth. It does. I don't think I'll ever load it up, though. I'm no hardcore gamer. Just older games, movies, YouTube videos, general surfing, and work-related tasks.

As far as OC, I think it's BIOS-limited somehow. (highsun T61-BIOS(1.0)_ASPM_OC). I enabled Coolbits in the nVidia X-Server settings, which enabled the Clock Frequencies settings, but every setting above the defaults of 475 and 702 on the 3D settings give me an error, "Failed to apply settings." I haven't figured it out yet.

*Edit. According to the documentation, one can underclock but not overclock in the Clock Frequencies settings due to "laptop thermal constraints", so it's hardcoded in.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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Re: How much can you undervolt your T61 gpu?

#21 Post by wujstefan » Mon May 06, 2019 2:55 am

DartMan68 wrote:
Sat May 04, 2019 5:13 pm
*Edit. According to the documentation, one can underclock but not overclock in the Clock Frequencies settings due to "laptop thermal constraints", so it's hardcoded in.
I had no troubles overclocking on stock Lenovo bios.
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Re: How much can you undervolt your T61 gpu?

#22 Post by Screamer » Mon May 06, 2019 6:18 am

DartMan68 wrote:
Sat May 04, 2019 5:13 pm
As far as OC, I think it's BIOS-limited somehow. (highsun T61-BIOS(1.0)_ASPM_OC). I enabled Coolbits in the nVidia X-Server settings, which enabled the Clock Frequencies settings, but every setting above the defaults of 475 and 702 on the 3D settings give me an error, "Failed to apply settings." I haven't figured it out yet.
I doubt so, the BIOS does not and should not limit the graphics chip's frequency range. Could you try overclocking via RivaTuner 2.24c?

If RivaTuner 2.24c does not work for some odd reason, try using MSI Afterburner.
DartMan68 wrote:
Sat May 04, 2019 5:13 pm
*Edit. According to the documentation, one can underclock but not overclock in the Clock Frequencies settings due to "laptop thermal constraints", so it's hardcoded in.
Was this documentation found in the overclocking utility that you used? It seems to be an artificial limitation, and a very strange one at that.

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Re: How much can you undervolt your T61 gpu?

#23 Post by DartMan68 » Mon May 06, 2019 4:48 pm

wujstefan wrote:
Mon May 06, 2019 2:55 am
DartMan68 wrote:
Sat May 04, 2019 5:13 pm
*Edit. According to the documentation, one can underclock but not overclock in the Clock Frequencies settings due to "laptop thermal constraints", so it's hardcoded in.
I had no troubles overclocking on stock Lenovo bios.
May I ask how you did so?
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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Re: How much can you undervolt your T61 gpu?

#24 Post by DartMan68 » Mon May 06, 2019 5:04 pm

Screamer wrote:
Mon May 06, 2019 6:18 am
DartMan68 wrote:
Sat May 04, 2019 5:13 pm
As far as OC, I think it's BIOS-limited somehow. (highsun T61-BIOS(1.0)_ASPM_OC). I enabled Coolbits in the nVidia X-Server settings, which enabled the Clock Frequencies settings, but every setting above the defaults of 475 and 702 on the 3D settings give me an error, "Failed to apply settings." I haven't figured it out yet.
I doubt so, the BIOS does not and should not limit the graphics chip's frequency range. Could you try overclocking via RivaTuner 2.24c?

If RivaTuner 2.24c does not work for some odd reason, try using MSI Afterburner.
DartMan68 wrote:
Sat May 04, 2019 5:13 pm
*Edit. According to the documentation, one can underclock but not overclock in the Clock Frequencies settings due to "laptop thermal constraints", so it's hardcoded in.
Was this documentation found in the overclocking utility that you used? It seems to be an artificial limitation, and a very strange one at that.
Concerning BIOS, I thought highsun's coded in the overclock. Are there settings I need to check there?

RivaTuner and MSI Afterburner are Windows. I'm on Linux, Solus 4. OC there = c2ctl, phc-intel, msr-tools, and NVIDIA X Server Settings via its xorg.conf file.

It's nVidia's own documentation concerning CoolBits. "On mobile GPUs, limited clock manipulation support is available when "1" is set in the "Coolbits" option value: clocks can be lowered relative to the default settings, but overclocking is not supported due to the thermal constraints of notebook designs."
Last edited by DartMan68 on Sun May 19, 2019 8:47 pm, edited 1 time in total.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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Re: How much can you undervolt your T61 gpu?

#25 Post by Screamer » Tue May 07, 2019 3:25 am

highsun did not modify the video-BIOS' graphics frequency settings, he only changed the graphics chip's core voltage. I don't think that there is anything you can modify in there, either.

Ah, I see. The majority occasionally prefer and use Windows for overclocking, but not Linux or any other operating system. I initially assumed that you would be using Windows, but this does not seem to be the case.

NVIDIA? That makes sense, as most mobile graphics chips are usually not given a decent heatsink to start out with. In any case, could you try overclocking with a Linux-only tool called Green with Envy?

wujstefan overclocked his T61p with MSI Afterburner, and that is also possible on a factory stock BIOS. This is because of how the graphics chip's multiplier was never locked in the first place.

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Re: How much can you undervolt your T61 gpu?

#26 Post by DartMan68 » Tue May 07, 2019 11:48 pm

Screamer wrote:
Tue May 07, 2019 3:25 am
highsun did not modify the video-BIOS' graphics frequency settings, he only changed the graphics chip's core voltage. I don't think that there is anything you can modify in there, either.

Ah, I see. The majority occasionally prefer and use Windows for overclocking, but not Linux or any other operating system. I initially assumed that you would be using Windows, but this does not seem to be the case.

NVIDIA? That makes sense, as most mobile graphics chips are usually not given a decent heatsink to start out with. In any case, could you try overclocking with a Linux-only tool called Green with Envy?

wujstefan overclocked his T61p with MSI Afterburner, and that is also possible on a factory stock BIOS. This is because of how the graphics chip's multiplier was never locked in the first place.
The BIOS is listed in a table with 4 columns. (Quadcore-APIC-Tabelle), (Spannung der Nvidia-GPU), (ASPM aktiviert), and (NVidia-GPU übertaktet). The 4th is why I thought he'd coded in the overclock. That word means overclock, overclocking.

I'm on Windows 7 Pro x64 now, installed last night. The distro I had, Solus, didn't support overclocking. I found one that did, Manjaro, based on Arch, that has c2ctl, phc, and msr-tools in their community repositories, and installed it alongside Windows. Learning how to use those tools now, as well as the ones mentioned for Windows, namely ThrottleStop and RivaTuner, etc. I will investigate GWE.

*Edit. ThrottleStop, RivaTuner, and TPFanControl have proven to be easy enough to config. and use thanks to information found in threads here by storm-chaser, you, wujstefan, Kel Ghu, and others. Now the T9300 is at 2.7GHz and 1.1v and the FX570m is at 540/1080/766 in Windows and at 2671/2537 (CPU) and 475/1404/950 (GPU) in Manjaro with phc-intel, c2ctl, and NVCtrl. I had to revert to Middleton's BIOS from highsun's due to EIST_LOCK being enabled and locking the CPU to 1.20GHz on both cores.

wujstefan mentioned he hadn't been able to undervolt lower than 1.05v with the FX570m unless it had also been underclocked. Mine is at 1.0v and essentially stock speeds. What would you recommend as a safe-ish OC for mine? I don't believe I can push the core clock to 650MHz due to the undervolting in effect. And given that my T61p has the original board in and an 08/05 build date, I don't really want to fry it, either. They're rare enough as it is.
Last edited by DartMan68 on Sun May 19, 2019 8:56 pm, edited 3 times in total.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

wujstefan
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Posts: 1126
Joined: Fri Mar 04, 2011 8:38 am
Location: Tarnow, Poland

Re: How much can you undervolt your T61 gpu?

#27 Post by wujstefan » Wed May 08, 2019 2:32 am

Screamer wrote:
Tue May 07, 2019 3:25 am
wujstefan overclocked his T61p with MSI Afterburner, and that is also possible on a factory stock BIOS. This is because of how the graphics chip's multiplier was never locked in the first place.
Exactly :) I have also tried the same with nVidia inspector and riva tune.
DartMan68 wrote:
Tue May 07, 2019 11:48 pm
wujstefan mentioned he hadn't been able to undervolt lower than 1.05v with the FX570m unless it had also been underclocked. Mine is at 1.0v and essentially stock speeds. What would you recommend as a safe-ish OC for mine? I don't believe I can push the core clock to 650MHz due to the undervolting in effect. And given that my T61p has the original board in and an 08/05 build date, I don't really want to fry it, either. They're rare enough as it is.
lower than 1.05V while maintaining stability under full load
I don't think there is any "unsafe" overclock unless you don't increase the voltage. If it turns unstable you can just stick back to stock clocks, or to the level that you have tested stable :) You do not increase the risk of frying the GPU.
Anyway I suggest just keep a spare board just-in-case. These systems are dirt cheap now (I can't understand why), and their GPU just sticks above their newer counterparts.
Too many thinkpads not enough time!
(stable under reduction)

DartMan68
Posts: 35
Joined: Sun Jun 11, 2017 2:33 pm
Location: Covington, GA

Re: How much can you undervolt your T61 gpu?

#28 Post by DartMan68 » Thu May 09, 2019 12:45 am

wujstefan wrote:
Wed May 08, 2019 2:32 am
Screamer wrote:
Tue May 07, 2019 3:25 am
wujstefan overclocked his T61p with MSI Afterburner, and that is also possible on a factory stock BIOS. This is because of how the graphics chip's multiplier was never locked in the first place.
Exactly :) I have also tried the same with nVidia inspector and riva tune.
DartMan68 wrote:
Tue May 07, 2019 11:48 pm
wujstefan mentioned he hadn't been able to undervolt lower than 1.05v with the FX570m unless it had also been underclocked. Mine is at 1.0v and essentially stock speeds. What would you recommend as a safe-ish OC for mine? I don't believe I can push the core clock to 650MHz due to the undervolting in effect. And given that my T61p has the original board in and an 08/05 build date, I don't really want to fry it, either. They're rare enough as it is.
lower than 1.05V while maintaining stability under full load
I don't think there is any "unsafe" overclock unless you don't increase the voltage. If it turns unstable you can just stick back to stock clocks, or to the level that you have tested stable :) You do not increase the risk of frying the GPU.
Anyway I suggest just keep a spare board just-in-case. These systems are dirt cheap now (I can't understand why), and their GPU just sticks above their newer counterparts.
I plan to get a spare board when I can. $100 for p/n 44C3931, the one mine has, is more than I can afford at the moment. RivaTuner has proven easy enough to config and use. The highest I can go with mine is 540/1080/766. Still a significant OC. The others I tried weren't stable. 550/1100/751 = artifacting. 575/1150/800 = crash and no recover, stayed black. 600/1200/901 = BSoD 0x116.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

wujstefan
ThinkPadder
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Posts: 1126
Joined: Fri Mar 04, 2011 8:38 am
Location: Tarnow, Poland

Re: How much can you undervolt your T61 gpu?

#29 Post by wujstefan » Thu May 09, 2019 2:18 am

DartMan68 wrote:
Thu May 09, 2019 12:45 am
$100 for p/n 44C3931, the one mine has, is more than I can afford at the moment.
Drop me a line. I can share one of my spares for 50% of that. 0508 date code.
DartMan68 wrote:
Thu May 09, 2019 12:45 am
540/1080/766
Still very nice with undervolt.
Too many thinkpads not enough time!
(stable under reduction)

DartMan68
Posts: 35
Joined: Sun Jun 11, 2017 2:33 pm
Location: Covington, GA

Re: How much can you undervolt your T61 gpu?

#30 Post by DartMan68 » Thu May 09, 2019 9:07 pm

wujstefan wrote:
Thu May 09, 2019 2:18 am
DartMan68 wrote:
Thu May 09, 2019 12:45 am
$100 for p/n 44C3931, the one mine has, is more than I can afford at the moment.
Drop me a line. I can share one of my spares for 50% of that. 0508 date code.
DartMan68 wrote:
Thu May 09, 2019 12:45 am
540/1080/766
Still very nice with undervolt.
Thank you much. I am definitely interested. It would preserve reasonable originality were I to decide to sell the T61p. Message sent.

Thank you. I wasn't sure how far I could push it. I started high based on what I found in the T6x forum here and worked my way downward.
Lenovo TP T61p MTM 6460-DVU T9300 4GB 128GB SSD WSXGA+ nVidia FX570m
Lenovo TP T61p MTM 6457-W3P T7700 4GB 128GB SSD *WSXGA+ **Intel X3100
*(repl. dim Samsung WUXGA) **(repl. faulty FX570m)

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