i855 chipset tweaks?

[thinkpadz]

Is there a clockgen available for the i855 ?
one that actually works..

[FTC]

Hi,

If you want to overclock, you need a clockgen/setfsb/.. program for your PLL chip. That is different from the 855 (chipset/northbridge..).... and the T4x series (the ones using the i855) have different PLLs depending on the model... for some of them, there is such a program, (i.e some T40s) for some others it has not been written yet, and for a third group (i.e some of the T42s models), it is impossible (they have a non programmable PLL).

[thinkpadz]

Oh, I understand the concept quite well, I have a prometia on my desktop pc 3ghz@4.5gz def voltage and a water/pelt combo on my 6800gt.
The thing is I noticed you didn't post any links?
where are these said programs?
I've tried the i865 clockgen and to no avail.
I have also used the i855 tweaker for changing cas latency but I must say it didnt really do anything performance wise. I was able to change my cl to 1.5 just fine but with no real benefit.?

Hi,

If you want to overclock, you need a clockgen/setfsb/.. program for your PLL chip. That is different from the 855 (chipset/northbridge..).... and the T4x series (the ones using the i855) have different PLLs depending on the model... for some of them, there is such a program, (i.e some T40s) for some others it has not been written yet, and for a third group (i.e some of the T42s models), it is impossible (they have a non programmable PLL).

[FTC]

Hi,

Well, I was able to overclock a T40 with the STEFSB module for the X31 : linky. Others have reported some success with some T42s and T42s using clockgen for the intel platforms : linky.
But seriously, there are only a couple of threads dealing with T4x overclock... do a search and you'll have all the information in a few minutes reading...

[thinkpadz]

thanks bro, works like a champ!

Hi,

Well, I was able to overclock a T40 with the STEFSB module for the X31 : linky. Others have reported some success with some T42s and T42s using clockgen for the intel platforms : linky.
But seriously, there are only a couple of threads dealing with T4x overclock... do a search and you'll have all the information in a few minutes reading...

[FTC]

thanks bro, works like a champ!

Well, glad it worked. Now if you post your thinkpad model and which program you used (of the ones suggested), this information may be useful for others...

And now a quick advice. It may be wise (if not done so), to undervolt your processor a bit, to account for the added heat caused by overclock.
You can use the Centrino Hardware Control program to do so : http://www.pbus-167.com/chc.htm

[thinkpadz]

one step ahead of you
I used the x31 setfsb ver.
heres what I score in 3dmar01 on my t41p 1.6@1.8 fireGL T2 370/255
http://img281.imageshack.us/my.php?image=115057kk.jpg
11,505!!!

And 2687 in pcmark05

http://img319.imageshack.us/my.php?image=dt2bz.jpg

It even retains the overclock when I reboot oddly enough?.
Haven't tried powering down then booting but I'm guessing that it won't hard boot overclocked.
all in all I get a nice little punch of free performance.
So far my Thinkpad has been able to handle Everything I've thrown at it.
including doom 3, HL2 etc..

thanks bro, works like a champ!

Well, glad it worked. Now if you post your thinkpad model and which program you used (of the ones suggested), this information may be useful for others...

And now a quick advice. It may be wise (if not done so), to undervolt your processor a bit, to account for the added heat caused by overclock.
You can use the Centrino Hardware Control program to do so : http://www.pbus-167.com/chc.htm

[Henry]

I used the setfsb program on my T42, and it worked OK until I got to 104 MHz fsb. After that, it just froze. I figured that it's not going to get me anywhere, so I stopped using the program.

[thinkpadz]

Working great on this end.
The only limiting factor is that you cant lock the pci/agp bus.
I dont feel comfortable taking it any higher than this frankly.
here is a comparison of my t41p 1.6@1.84 against an dell inspirion 9100with a p4 and an oc'd 9700. using 3dmark03 btw..this is the fastest bench on the orb for the 9600/9700 class.
not too shabby really...
http://img293.imageshack.us/my.php?imag ... ell1hj.jpg
heres aquamark score of 25,671
http://arc.aquamark3.com/arc/arc_view.php?run=424116298

I used the setfsb program on my T42, and it worked OK until I got to 104 MHz fsb. After that, it just froze. I figured that it's not going to get me anywhere, so I stopped using the program.

[thinkpadz]

dup