Thinkpads Forum

I am interested in doing a CPU upgrade in this machine. I saw a 650Mhz PIII MMC2 module on EBay that says it's for a Dell. Are all of these MMC2 modules interchangeable? My second question is what is the fastest MMC2 module that would work in this machine? I believe they go up to 850Mhz. I am aware of the issues with L2, timing of the 32MB onboard RAM, bus speed increase with possible RAM incompatibility, and speedstep etc.

Yes, they should be interchangeable, unless it is a Celeron....I'm still not clear on whether or not the Celerons will work. (Some say yes, some say no)

The 600E will handle up to a PIII 850MHz, as you stated. The issue at that point though, might be heat.

Thanks for the reply. The one I was looking at is coded PMM65002101AB. To the best of my knowledge this is a PIII not a Celeron. I was worried about heat also, so I think I might limit the upgrade to 650Mhz unless someone has done an 850 upgrade and can advise on upgrading cooling as well.

Harryc wrote:I was worried about heat also, so I think I might limit the upgrade to 650Mhz unless someone has done an 850 upgrade and can advise on upgrading cooling as well.

In the 600E series i have gone from 366 to 500, 650 and 750 with the 108mhz fsb mod running the 750 at 810mhz that was a great improvement in performance.

For cooling just use thermal paste, the best is artic silver 5.

I have a 750 PIII available that have never been overclocked.

Pm me if interested.

Edit: No longer available glenn778 got it.

For cooling just use thermal paste, the best is artic silver 5.

I have a 750 PIII available that have never been overclocked.

Pm me if interested.

Edit: No longer available glenn778 got it.

I didn't even read the thread and it was gone . I guess you have to move fast around here. What was the CPU temp on max load @ 810mhz?

Harryc wrote:What was the CPU temp on max load @ 810mhz?

No it wasn't.

Sorry you miss it.

cmarti wrote:

Harryc wrote:What was the CPU temp on max load @ 810mhz?

No it wasn't.

Sorry you miss it.

, how hot did the CPU run (temperature)?

With artic silver around 70C at full load.

cmarti wrote:With artic silver around 70C at full load.

Thanks for the reply. I think I'll try a PIII 750 then.

Would the damage indicated in the photo effect the functionality of the mmc2 module?

Harryc wrote:Would the damage indicated in the photo effect the functionality of the mmc2 module?

I don't think so, because it still would be attached by the screws.

But wait! the pins near the damaged zone could be also damaged, so make sure the seller provides a DOA warranty.

But anyway you will know once you install it.

Harryc wrote:Would the damage indicated in the photo effect the functionality of the mmc2 module?

If I didn't know any better I'd say you took a picture of a 400Mhz 600E that I have! Although a closer look reveals that you only have a broken connector on one corner. Mine extends to two corners. I have not noticed any problem with the system; it passes the built-in diagnostics and runs fine. As cmarti indicates, as long as the screws are tight and the pins un-bent (look closely with a magnifying glass), then you should be fine.

rkawakami wrote:

Harryc wrote:Would the damage indicated in the photo effect the functionality of the mmc2 module?

If I didn't know any better I'd say you took a picture of a 400Mhz 600E that I have!

I also have an MMC2 module that looks like this. Mine's a PIII 800MHz, and it works fine.

The damage in the photo is typical of what can happen if you pull up on the card unevenly when removing it, or foolishly attempt (as I did) to leverage the card up and out by sticking a screwdriver under one side of it and bending it up: if you are not careful about where you stick things under the edge of the card you can easily snap the plastic guard/holders that surround the pins.

Phil.

Thanks for the replies. I did not take this photo, it was 'borrowed' from an EBay auction. If I decide to bid on this one I will definitely ask the seller for a non-DOA warranty.

harry,dont worry about the chip i had much worse go ok
it will still be sturdy like a brand new one,just make sure
you inspect the pins with a good magnify glass because 1 bent pin
can ruin a good mobo.


in regards to speed ,id say 810 is about max the stock 600e heatsink with good thermal mat +compound will handle though i must admit 70 deg max @ 810 is impressive,considering these cpus can handle over 88deg before stability is compromised.
the ol rig is running 918mghz with 600x heatsink. temps maxed out to about 83c deg (virus loaded)all runs well in windows however when the fan cuts in, it makes an annoying pulsating noise which has prompted me to revert the 850 cpu back to the 600x machine and stay with the quieter running 750 cpu +600e heatsink@810mghz.
the best software to enable l2 cache is
+cpu msr 090.(less buggy tha pleap)though create shortcut in win xp all users /startup folder for invisible auto load cache settings to work.
+deepsleep ,v 1.3+1.4 to (again copy a shortcut in start up folder)
for auto load to get it up to speed.

unrortit, thanks for taking the time to reply. It's nice to see that these older guys can still handle the heat . I'll be sure to check pins. Meanwhile I am upgrading an 800 PIII to 1Ghz in a T-21 using a T22 heatsink. So as soon as that project is done I'll work on the 600e.

ive got a t21 850 floating about somewhere,
from what i remmember i was satisfied with the speed somehow
lost interest and shelved it for a rainy day.
the 1000 upgrade certainly is enticing
did you try the original heatsink initially?
these cpus are so hard to find nowadays.

Yes I am running the original heatsink, although I do have a T22 heatsink ready to go. The problem with the T22 heatsink is that it does not have the raised platform where the CPU meets the heatsink...in fact I believe it calls for a thermal pad to make up for the gap in a normal installation. So until I can get my head around what's needed there, I went with the original T21 heatsink. What have other folks done to make the T22 heatsink work? I could just goop the hell out of it with thermal paste, but that does not provide for very efficient heat dissipation.

Edit: The T21 Heatsink is working well. I see no temperature difference between the 1Ghz PIII and the 850Mhz PIII at idle. (@ 48*c) . I'll heat it up later on to see the temps.