R51 upgrade from Celeron to Dothan - no problem!

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#1 Post by **underclocker** » Tue Oct 31, 2006 8:05 am

FYI, I upgraded my 2887 model R51 from a Celeron to a Banias and then a Dothan CPU. No problem at all. The BIOS and EC are very current for this model and I am using the most recent version of a Dothan CPU called 725A, 1.6GHz. This is a C stepping CPU.

R5x Series models 2883, 2887, 2888, 2889, 2894 and 2895 shouldn't have any upgrade issues. The other models are like the T40, T41 & T42 models and can not be upgraded with 725A processors (or other C stepping CPU's) at this time. However, other Dothan (and all Banias) CPU's should work in all R5x's.

Performance bump is noticeable.

rossk7 · #2 Post by **rossk7** » Fri Apr 20, 2007 11:42 am

What is the FSB of the model you have? I tried upgrading an R51 2883-2ZU from a Celeron M 1.3 to a 1.6 and it wouldn't boot.

ms5133 · #3 Post by **ms5133** » Fri Apr 20, 2007 1:43 pm

Ditto for my R50e. type 1834 from a M340 to Dothan 1.7

You should be looking for a 400FSB CPU..like SL7EG .

The main advantage I can see (at least for my useage) is
increased battery life, and the neat Centrino logo when I
log in.

rossk7 · #4 Post by **rossk7** » Thu Apr 26, 2007 9:20 am

well it was a no go on the celeron M or Pentium upgrades. If anyone can find me the processor that worked for them and post the link, I would certainly appreciate it.

Thinkpad R51
2883-2Zu
Celeron M 320(Banias)
1300Mhz, 400MHZ FSB
Crucial 2Gb DDR333
Hitachi 120Gb HDD

upgrades that didnt' work
SL5Z7 Pentium M 1.7
SL6J2 Celeron M 1.6

#5 Post by **underclocker** » Fri Apr 27, 2007 8:14 pm

Try not to double post...response below...

http://forum.thinkpads.com/viewtopic.php?t=33811

R51 upgrade from Celeron to Dothan - no problem!

R51 upgrade from Celeron to Dothan - no problem!

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