Do you need to reinstall OS when changing MB&CPU on 600X

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SnoopyD · #1 Post by **SnoopyD** » Thu Feb 01, 2007 3:56 pm

Is it necessary to reinstall XP OS after doing a motherboard and CPU upgrade on a TP 600X (From a 2645-5EU to a 2645-9ZU)? Sometimes the OS will read the CPU core speed as 143mhz instead of 648mhz on A/C power. Would a OS reinstall fix this. This problem happens everynow and then. However, it doesn effect performance or speed then this occurs. Does anyone know. Thanks.

Stargate199 · #2 Post by **Stargate199** » Thu Feb 01, 2007 7:24 pm

No. The incorrect speed is most likely due to the fact that your 600X is a speedstep model. Intel Pentium III with Speedstep change their speed to a lower, less power consuming one when switch to battery power. Windows will mostly read the cpu speed incorrectly (does this on my T21 and other speedstep computers I have worked on). If you are swapping MB & CPU, you don't need to reinstall Windows unless you want to. The only time you will need to reinstall is if you change the chipset. The 600E/X, T20/21, A20/21 all use them same chipset (as far as I know). I believe it is the 440BX Intel chipset, but can't remember right now.

SnoopyD · #3 Post by **SnoopyD** » Fri Feb 02, 2007 10:43 am

Your're right it is a speedstep CPU. I just didn't know that the hardware can actually throw off the OS like that. Thanks again for the answer.

FYI: On the chipset I do believe it is too the 440BX, I think the 600's took the 400MX - but don't quote me.

krcmd · #4 Post by **krcmd** » Wed Sep 17, 2008 7:15 am

Recently got a used t43P.
Original specs say 2.26 gH CPU.

Sys Info now says 2.0 gH. Had MB replaced by Lenovo before I got it, but they say they didn't change the CPU.

Could this be a software thing?

thanks

#5 Post by **Harryc** » Wed Sep 17, 2008 7:32 am

Download and run cpu-z to confirm the CPU model. Post it here if you need assistance.

http://www.cpuid.com/cpuz.php

krcmd · #6 Post by **krcmd** » Wed Sep 17, 2008 7:42 pm

The applet reports 2.00 gH processor.

#7 Post by **Harryc** » Wed Sep 17, 2008 8:08 pm

Under Processor 'Name", What does it show in that field?

whizkid · #8 Post by **whizkid** » Thu Sep 18, 2008 8:53 am

You may need to install the proper CPU/chipset driver to get SpeedStep to work properly in XP.

krcmd · #9 Post by **krcmd** » Thu Sep 18, 2008 6:48 pm

Per ID program (also Intel ID prgm):

Pentium M 760
Dothan Brand ID 22
Family 6
Model D
stepping 8
Bus 133.0

#10 Post by **Harryc** » Thu Sep 18, 2008 7:12 pm

A Pentium M 760 is a 2.0Ghz CPU. When the board was changed so was the CPU.

krcmd · #11 Post by **krcmd** » Thu Sep 18, 2008 7:14 pm

Easyserv says they didn't do it, and don't have any record of what CPU they received.

#12 Post by **Harryc** » Thu Sep 18, 2008 7:15 pm

Well, someone did it.

Do you need to reinstall OS when changing MB&CPU on 600X

Do you need to reinstall OS when changing MB&CPU on 600X

Thanks for the answer

Incorrect CPU speed?

CPU Model

Software Issue or Somebody Swapped the CPU?

CPU

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