Pentium M @ 2.53 100% stable, 2.66 99.9% stable - in a notebook!

Hello friends, I was just reading another thread, http://notebookforums.com/showthread.php?t=86241, where someone posted a tomshardware review on the pentium M, demonstrating the overclocking abilities of the pentium M processor. And then a flame war ensued. Since the last thing I want is to get caught up in a flame war or be branded a fanboy, I want to start from scratch.

Based on what I read in that thread, I don't think it is yet common knowledge that laptops can be overclocked, either by FSB changes via software (such as setfsb) or through pin mods. I want to share with you my results on an attempt to turn a 2.0 pentium m into a 2.66. This can be done with any laptop with a pentium M and a 533 FSB.

My results: http://www.xtremesystems.org/forums/...ad.php?t=63514

Where I first read about it: http://notebookforums.com/showthread.php?t=76096. Gotta give credit to Spazilton for the idea behind the vmod and Ziddey for the fsb mod.

I am currently 100% stable at 2.53. For benching I can turn it up to 2.66 and unleash hell, although if I look REALLY hard, I can find stability problems at that speed.

I apologize to those who have already been tracking my progress (namely those in the 9300/xps2 thread), I don't mean to flaunt or anything, just want everyone to know what is possible.

I personally believe that anyone can take a 1.8 and turn it into a 2.4 by simply grounding BSEL[0] and VID[0]. This will run the chip at 1.324v instead of 1.308v Here is a link to intel's datasheet: http://developer.intel.com/design/mo...hts/302189.htm

The information you need is in section 4.1. You can use a strand of copper wire taken from speaker wire to do the mod It only needs to be 3/8 inch long. Here is a photo guide showing how long the wires must be: http://notebookforums.com/showthread...ht=photo+guide . The pins you must connect for fsb switching are c13 and c14, and the pins for voltage modding are d2 and e2. The voltage table can be found in this document in section 3.3, table 3.1: http://download.intel.com/design/mob...s/30526201.pdf

I don't recommend anyone do this mod unless they are willing to void their warranty, and I would recommend reading the second link I posted for more information about doing it. I will not guarantee this will work, however, evidence shows it will.

Here is an awesome guide done by Ziddey, the guy who came up with the idea first:
http://www2.ijib.com:88/phpbb/viewtopic.php?t=3

I'll agree some people know already, like yourself obviously. I also said I apologize to those following the dell thread. I just read some posts in the general section that let me know that most here in the forum don't read the dell threads and have been missing out.

With a clock generator. It is a program that has access to your PLL chip, the chip responsable for setting the FSB. Some motherboards can't be overclocked in that manner, such as my own. You have to identify specifically what motherboard you are using, or what PLL chip it has on it. Here's one clock clock generator: http://www.cpuid.org/clockgen.php
and another: http://www13.plala.or.jp/setfsb/

Things would have been much easier and less costly if one of these options worked

Yeah the z71v does overclock well, gotta love that fsb switch
Are you saying that when your cpu is idle your temp is 44 degrees, or is that 600mhz with a load on it? it doesn't make much sense to me why you'd have a temp that high if you're idle, but it also doesn't make sense why you'd run 600mhz with a load...?

nice OC there, though; 2.4 @ less than default voltage is awesome. Does it sound like a leaf blower when it gets hot?

(wait a second ... laptop ... leaf blower ... i may see 2.66 stable yet! )