Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

Pentium M 780 nhc undervolting

T40/T41/T42/T43 Series
Post Reply
Message
Author
kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2659
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Pentium M 780 nhc undervolting

#1 Post by kfzhu1229 » Sun Feb 05, 2017 8:55 pm

I am just wondering what undervolting settings have all of you used on Pentium M 780 that works without underclock/freezing?
I have set my 6x setting into 0.988V and 17x (max) setting into 1.228V. Before it has to top to around 94 degrees, now it tops at 80 degrees with no GPU usage and 83-84 with full GPU usage (FireGL V3200)
Also did any of you underclock the GPU as well? FireGL V3200 runs especially hot! The GPU can go up to 95 degrees where it throttles while the CPU remains at 75!
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

ajkula66
SuperUserGeorge
SuperUserGeorge
Posts: 17339
Joined: Sun Feb 25, 2007 11:28 am
Location: Crepaja, Serbia

Re: Pentium M 780 nhc undervolting

#2 Post by ajkula66 » Sun Feb 05, 2017 11:15 pm

My settings from when I had PM 780, a digit or two might be incorrect, the paper is old and I've just scribbled the values on it:

Multiplier 6 - 0.6

8 - 0.78

9 - 0.812

10 - 0.876

11 - 0.956

12 - 1.004

14 - 1.064

15 - 1.120

16 - 1.2

17 - 1.224

As for the GPU, I've played with some underclocking but was never really all that pleased with the results so I haven't saved any figures.
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

my music if anyone cares: https://www.youtube.com/@TheWaterMemory

PMs requesting personal tech support will be ignored.

axur-delmeria
Senior ThinkPadder
Senior ThinkPadder
Posts: 4413
Joined: Mon May 28, 2012 5:49 am
Location: Metro Manila, Philippines

Re: Pentium M 780 nhc undervolting

#3 Post by axur-delmeria » Mon Feb 06, 2017 4:25 am

kfzhu1229 wrote:I am just wondering what undervolting settings have all of you used on Pentium M 780 that works without underclock/freezing?
There are no generic/universal undervolting settings. You have to stress-test the CPU every time you lower the voltage.
Usually, you'll be spending an entire day trying to find the lowest stable voltage.
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons :lol:
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E :cry:

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2659
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: Pentium M 780 nhc undervolting

#4 Post by kfzhu1229 » Mon Feb 06, 2017 11:02 pm

ajkula66 wrote:My settings from when I had PM 780, a digit or two might be incorrect, the paper is old and I've just scribbled the values on it:
Now I am trying these values. Just to make sure in case you had some incorrect values, I have raised up every voltage you've provided by one option available in the drawer boxes in nhc (except for the 17x one which I have tested before that 1.228V is indeed stable). I am now trying to use this machine on a daily basis with these values and will keep this updated.
axur-delmeria wrote:There are no generic/universal undervolting settings. You have to stress-test the CPU every time you lower the voltage.
Usually, you'll be spending an entire day trying to find the lowest stable voltage.
Yep I know this part. I was just asking for some values for me to start off with to save me some hassle.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2659
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: Pentium M 780 nhc undervolting

#5 Post by kfzhu1229 » Thu Feb 09, 2017 6:38 pm

So far it is working great on me!
I used the following settings (based on ajkula66's - thanks for that recommendation):
M V
6x 0.7V
8x 0.796V
9x 0.828V
10x 0.892V
11x 0.972V
14x 1.084V
15x 1.116V
17x 1.228V
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

Post Reply

Return to “ThinkPad T40/T41/T42/T43 Series”

Who is online

Users browsing this forum: No registered users and 52 guests