Managing Pentium-M Speed/Voltage with software (temp sticky)

[Scorpiontico]

two heat sink connect to the CPU and one heat sink connect to the GPU.

yeah kinda like that, its a whole piece actually, mainly it covers the cpu area and lets say like an extension part covers the gpu... i dont think you could add thermal compound to the gpu since between it and the heat sink there is some soft gummy paste plus like a layer of plastic. at least i wouldnt do it because id be adding thermal compound over the cool looking (logos and words printed on it) ati gpu and under a plastic layer.

i guess less fan activity gives more batt power... i have the x300 ati (64mb) btw i can play doom 3, unreal 2004 and chessmaster 10th.

one thing that bothers me alot is that i noticed there are 2 chips that overheat like a mofo guys, the one beneath the wifi card which i guess is the chipset and the other old-celeron-cpu-looking one few inches over the gpu... both of these chips have no freaking heatsink or fan.

lets say right under the touch pad or middle of the botton of the laptop you can feel alot of heat that comes from one of these chips (chipset?), i always thought the heat from the botton was due the gpu but it isnt!

adding some copper or aluminiun (and as5 ) on those chips might help... ill figure something out.

any more info related to this is greatly welcome.

[JHaislet]

Yeah, I too had "WTF?" race across my mind when I opened mine up for the first time as well. I can't imagine those chips NOT giving off ANY heat...

[CoolDragon]

With CHC used, do you need to UNINSTALL/DISABLE IBM power manager? (Which defines different power scheme and shows the battery status on the taskbar, my guess is that it uese Windows internal function to control the clock speed and the CHC will override it.)

Another question is what kind of CMOS setting should be regarding the CPU frequency setting: automatic, maximum .......

[GeorgeP]

With CHC used, do you need to UNINSTALL/DISABLE IBM power manager? (Which defines different power scheme and shows the battery status on the taskbar, my guess is that it uese Windows internal function to control the clock speed and the CHC will override it.)

No, no need to disable or uninstall IBM power manager. CHC simply uses the scheme that is set with IBM power manager. If you create and use a custom profile in IBM power manager, that profile will be listed in CHC.

G

[Aristotle11]

Anyone know the benefits of "Enable Custom Dynamic Switching" in CHC? Does it lower temps, or prolong battery life much? How much slower does it make the computer for loading Firefox or Outlook?

Thanks,
Aris

[Navck]

We found out of the uncovered chips is actually a NORTHBRIDGE chip. And they DO get hot (Aaahhh don't touch the ones in your computer!)

Edit:Anyone else ever notice the gray thermalpad connecting keyboard and heatsink? Smart for more heat disappation.

[Scorpiontico]

We found out of the uncovered chips is actually a NORTHBRIDGE chip. And they DO get hot (Aaahhh don't touch the ones in your computer!)

Edit:Anyone else ever notice the gray thermalpad connecting keyboard and heatsink? Smart for more heat disappation.

so if one is the chipset (which one exactly?) then whats the other one for?

[krma-thkpds]

i don't think nirvanas undervolts are good for sonoma 2,13MHz. i did as said, tried the voltages and got problems with 8x and 16x multiplier.

at 8x i couldn't pass short test in chc and had problems a lot with 16x multiplier. it failed short chc test on that freq. and on two freqs higher. running prime95 showed fatal error just a few secs after started it.

so in my opinion those voltages (think they are listed on page 2) for sonoma 2,13MHz are too low.

[GeorgeP]

so in my opinion those voltages (think they are listed on page 2) for sonoma 2,13MHz are too low.

Thanks for the datapoint. That is helpful for people looking for optimal voltage settings. I'm using similar settings to Nirvanas and they have worked fine for me for three weeks. I've also done stress testing with both the long test in CHC and Prime95 overnight, no problems. (But I have a sonoma 1.86Ghz). I think ultimately the right voltages depend on:

- the characteristics of a given CPU. Variations in the manufacturing process will mean each individual CPU will exhibit slightly different characteristics, including stability at lower voltages

- the user's risk tolerance. A user can decide if increased battery life and a quieter machine is worth an increased risk of a crash, every six months, or whatever the mean-time-between-undervolting-related crash is.

G

[Navck]

Yes, not every CPU is alike

[krma-thkpds]

Thanks for the data point. That is helpful for people looking for optimal voltage settings. I'm using similar settings to Nirvanas and they have worked fine for me for three weeks. I've also done stress testing with both the long test in CHC and Prime95 overnight, no problems. (But I have a sonoma 1.86Ghz). I think ultimately the right voltages depend on:

Maybe your system is stable because of lower CPU core. You said you have 1.86MHz processor, mine is 2.13MHz and looks like it needs a bit higher voltages. I'm just wondering why Nirvanas is stable a "lot" more undervolted as mine. (He has the same processor as me.)

[de Siem]

just to add,

I'm using the same voltages as Nirvana and use a 2.13ghz sonoma on my T43p.
Mine machine runs stable with these values. The machine is plugged in, I hardly run it off battery power.

[Tonic]

so in my opinion those voltages (think they are listed on page 2) for sonoma 2,13MHz are too low.

Thanks for the datapoint. That is helpful for people looking for optimal voltage settings. I'm using similar settings to Nirvanas and they have worked fine for me for three weeks. I've also done stress testing with both the long test in CHC and Prime95 overnight, no problems. (But I have a sonoma 1.86Ghz). I think ultimately the right voltages depend on:

G

Hi George, since we have the exact cpu, do you mind telling me are the voltages of urs.

[GeorgeP]

Hi George, since we have the exact cpu, do you mind telling me are the voltages of urs.

Not at all. Mine are:

6x: 0.700
8x: 0.764
9x: 0.796
10x: 0.860
11x: 0.940
12x: 0.972
13x: 1.004
14x: 1.036

I also have the ATI clock set at:

ATI Core: 105
Memory: 125

I don't run very demanding apps, mostly MS Office, but don't perceived any performance impact from the lower ATI clock speed.

G

[Tonic]

Thank you so much, i am now using the exact voltages us you, everything seems to be very stable, I've been playing wow for an hour now, noticed a maximum temp of 60C which is really good.

Hi George, since we have the exact cpu, do you mind telling me are the voltages of urs.

Not at all. Mine are:

6x: 0.700
8x: 0.764
9x: 0.796
10x: 0.860
11x: 0.940
12x: 0.972
13x: 1.004
14x: 1.036

I also have the ATI clock set at:

ATI Core: 105
Memory: 125

I don't run very demanding apps, mostly MS Office, but don't perceived any performance impact from the lower ATI clock speed.

G

[JohnT]

This is a little bit off-topic right now since people are all talking about processor control. However, I think that it is worth mentioning that some experimental code on fan control is being done in the linux community.

Check the following link:
http://ibm-acpi.sourceforge.net/README

Like another user said before earlier, I WISH THERE was "somebody" here who could write a prog that could control fan speed and on and off functions (like that dell dude)

[stalin]

Hi guys,

I decided to contribute my 2 cents...
I have (T43p, 2.13Ghz 770) and here are my chc setting (I'm running perfectly stable and have spent couple of hours with prime95 and RM Clock, so hope it helps u too)

6x - 0.7
8x - 0.732
9x - 0.764
10x - 0.812
11x - 0.860
12x - 0.908
13x - 0.956
14x - 1.004
15x - 1.068
16x - 1.116

ATI Tool Settings:

Core - 75.00 Mhz,
Mem - 99.00 Mhz

Have fun

[nirvana0001]

Hi guys,

I decided to contribute my 2 cents...
I have (T43p, 2.13Ghz 770) and here are my chc setting (I'm running perfectly stable and have spent couple of hours with prime95 and RM Clock, so hope it helps u too)

6x - 0.7
8x - 0.732
9x - 0.764
10x - 0.812
11x - 0.860
12x - 0.908
13x - 0.956
14x - 1.004
15x - 1.068
16x - 1.116

ATI Tool Settings:

Core - 75.00 Mhz,
Mem - 99.00 Mhz

Have fun

that's weird, as i know, P-M 770 (2.13Ghz) doesn't has 13X and 15X

[ricehero]

hey, hows everyone doing? new to the forums and i have a 2373-9fu. i was wondering if anyone has any solid setting for this baby. i believe i have a pm 1.7 binias core. iam a college student and i need every single bit of juice outta this laptop. if anyone can help me out, it would be very very cool of you.

thanks in advance

[HamTard]

I don't have a Thinkpad T series, but just a warning. I tried some undervolting with my brand new Inspiron 9300, and my Pentium M 750 seems to have permanently damaged it. By moderate, I mean 0.796V min, 1.180V max. It is now always unstable, even at clock speeds. As far as I can tell, I'm the first person anywhere to get CPU damage from this, but it can happen. I removed CHC, double checked if my voltages were really returned to stock with RM Clock, but no matter how many times I run Prime95 with the large FFT torture test, I fail within minutes. I really wish I bought a ThinkPad.

[JohnT]

Hi, Hamtard,

Did you run prime95 tests before you ever used CHC?

I don't have a Thinkpad T series, but just a warning. I tried some undervolting with my brand new Inspiron 9300, and my Pentium M 750 seems to have permanently damaged it. By moderate, I mean 0.796V min, 1.180V max. It is now always unstable, even at clock speeds. As far as I can tell, I'm the first person anywhere to get CPU damage from this, but it can happen. I removed CHC, double checked if my voltages were really returned to stock with RM Clock, but no matter how many times I run Prime95 with the large FFT torture test, I fail within minutes. I really wish I bought a ThinkPad.

[nrj45]

Hey Hamtard : did you reinstall windows (if using windows) ? Perhaps crashes during your tests made windows unstable and you're now believing it's the cpu ?

[HamTard]

After some reading, I tried running prime95 with just 1 stick of ram at a time. Turns out it was just a bad stick of ram, I'm 8 hours prime95 stable at the moment with 1 stick of ram. So I guess my CPU is okay.

FYI I did a restore to factory default and it didn't help. Only with a little trial and error did I determine which stick of ram was bad, and that ram was the problem.

To know if it's your CPU or ram, run both the small FFT and large FFT. The small FFT uses only cache, and I was doing fine in that, but the large FFT uses ram too, and that's why I kept failing.

[TimWang]

Couldn't you have performed a memory test instead of Prime95?

[eri7154798]

T42p 2373-HBU
1.8Ghz, 1.5 gb Ram

Video ram is at factory default speeds

The voltages I'll be showing are ones that are one step above stable voltage for me, just so I have a buffer zone for my computer when there are some cold starts in the winter...

6x - .716
8x - .748
10x - .828
12x - .892
14x - .988
16x - 1.068
18x - 1.148

[Flandry]

For another data point, my T42 2374 - 3VU made it through 1hr 35 minutes of Prime95 at its native 1.7GHz and at 0.988V, and was at ~58C throughout. It failed within a minute or two at 0.972V. I've backed it off to 1.004V, "only" 0.3V below its native Voltage! I'm very impressed with the polish and features of CHC, and with the performance of the Pentium M. Now, CHC just needs to adjust FSB and memory.

At 600MHz and 0.7V, by looking at the load Wattage under battery power in CHC (an excellent feature just by itself), the power consumption at rest seems to be a bit more than 1W less than at defaults (~12W). It's interesting to see how long it takes the power draw to reach a minimum--it seems to slowly approach some base level. I wonder if its the gradual flushing of the cache banks and their subsequent shutdown that causes the effect.

[jhonyl]

New version of CHC 1.9 beta 3 was released. Did anyone try it? Does the fan control works now?

[gunston]

is there a good guide to clock down my ATI graphic?
T43, 64ATI Radeon X300, P M 750(1.86GHz)

[sevenw]

I have T40 with 1.3mhz Banias, I always use 6x multiplier, so I undervoltaged only it.
So my setting is 0.796@600Mhz (tested only with CHC long test, not with Prime95 and this is the lowest possible) but it seems to be stable, but I don't see any change in the CPU temp...

[troubadix]

Hi!

@gunston:

do as I did in:

http://forum.thinkpads.com/viewtopic.ph ... ht=#106412

and use the PowerPlay option.

Ciao, troubadix