What 600X models support speedsteping

[LPC]

I have been reading and it seems there are two tires of 600x models? Some having speedstep and others not?

My plan is to purchase a 600x and upgrade the CPU to 850ghz.

I have read here that the 5FU and 9FU have SS. So during my search for a base system should I avoid 3FU's and 4FU's?
I assume 7FUs and 8FUs also support SS?

In summary, what 600x models support SS?

Thanks

[gator]

I dont have the model number information on the top of my head, but I do know that the 450Mhz models do not support speedstep. This document confirms my statement:

http://www-307.ibm.com/pc/support/site. ... IGR-4FMNJC

Also, AFAIK, IBM never originally sold a 850Mhz 600X. I might be wrong here, maybe Whizkid of Phil (pkiff) ca confirm this.

edit: Found it. Only the 600X thinkpads with SpeedStep are 5F* and 9F*:

http://www-307.ibm.com/pc/support/site. ... IGR-4HLVUP

Hope this helps.

[ms5133]

See this post

http://forum.thinkpads.com/viewtopic.ph ... tep+boards

And you don't have to have a speedstep MB to upgrade.mine wasn"t.(Of course it doesn't actually step..it runs at 850Mhz when the power adaptor is used)

There are many, many posts about this in the 600 forum.

[LPC]

Wonderful! Thanks Gator

I read all the threads 600 upgrade sticky and it was never confirmed wich 600x models had SS. I would guess then that the 5Fx and 9Fx are the only 600x models that can be upgraded to 850mhz?

[Charles Good]

My 3EU 600x says, on one of its config utility screens, that it has a "600mhz speed step" processor.

[pkiff]

My 3EU 600x says, on one of its config utility screens, that it has a "600mhz speed step" processor.

Then I don't think you have a stock 3EU machine. The original specs for the 2645-3EU model are listed in the "twbook" as:
Win 98
Pentium III 450MHz
CD-ROM
6.0GB hard drive
PIO4 or Ultra DMA/33
Avail Dec 1999 / Withdrawn Jan 2001 Dec

Phil.

[Davemci]

edit: Found it. Only the 600X thinkpads with SpeedStep are 5F* and 9F*:

http://www-307.ibm.com/pc/support/site. ... IGR-4HLVUP

Hope this helps.

That applet update is dated 3-2000. My 2645-9WU was made in 12-2000. There are probably other SpeedStep 600Xs. They just aren't listed because they don't require the fix.