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What's DOS?
Posts: 1
Registered: ‎03-22-2012
Location: bsas
0 Kudos

lenovo x61s unsuccessful ram upgrade

i just bought two elpida 2gb 2rx8 pc2-6400s-666 ram modules, and then i installed them on my thinkpad x61s 7666 running windows 7 ultimate 64 bits. 

the windows starts fine and,  its just suddenly  a blue screen pops up saying there is an error.

so the question are_

what is really wrong with the pc?

are the correct type of ram the ones that i am using? 

how can i fix it?


thank you very much

Community Moderator
Posts: 3,153
Registered: ‎01-01-2010
Location: San Francisco
0 Kudos

Re: lenovo x61s unsuccessful ram upgrade

You could have a DOA RAM module. If you havve some sort of memory tester, try the 2 chips one at as time. Memtest86+ is free and good.
Posts: 20,913
Topics: 128
Kudos: 1,261
Solutions: 1,344
Registered: ‎12-19-2008
Location: Australia, Melbourne
0 Kudos

Re: lenovo x61s unsuccessful ram upgrade

sometimes the 800 mhz ram doesn't work properly in ThinkPads, it is best that you use 667 mhz ram instead.

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft