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Win 7 64-bit BSOD continually crashing fresh install

post #1 of 4
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Ok. I'm thinking that this is really a mempry issue but I'm going to post here in the hopes that someone has come across the same issue as me. First my machines specs: Intel Core 2 Quad 6600 CPU, BFG NVidia MOBO w/650 chipset, NVidia 512MB graphics card, 320 SATA HD (forget the brand) and most importantly the memory: I have two 1G sticks from mempry master that are 5300's and two 2G sticks from PNY that are 6400's. The 5300's are the originals and I added the 6400's thinking that the 53's were 64's, but they obviously weren't.
So... I was running XP HESP3 (32-bit) on this machine with the two 5300 sticks and decided to upgrade the RAM not realizing that the most a 32-bit system can recognize is somewhere aroung 3.3G. I bought the two 6400 sticks from Bestbuy.com and put them in, the OS only recognized 2.75 G of the what was now the total of 6G of RAM. For a few weeks everything seemed ok then I started getting the BSOD with no warning and the system would reboot itself. I began chasing the problem and eventually decided to install a clean version of Win 7 64-bit. Upon initial install I got an error message that prevented the software from installing and found out that it was because of the miss-matched RAM. I removed the two 5300 sticks and the system installed fine but only recognized 2 of the 4 G installed sticks. I put in the other two sticks (for the total of 6G) and the system then recognized the total 6G and it was flying like the wind. Shortly thereafter though, I began getting the BSOD again and crashes without warning.

My question is this: Will missmatched RAM such as this cause these crashes? and Why is only 2 of 4 G recognized when I install just the two PNY sticks? Has anyone else had this happen to them? Very frustrating.
post #2 of 4
All these questions, all these questions... You need to run memtest. Take out all of your sticks except for the first slot, and test each of your RAM sticks with after mounting that ISO on a disc and booting from it. Memtest will tell you if your memory is causing problems.
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post #3 of 4
Don't forget to check you DMP files as well.

Follow this guide:

http://windows7themes.net/how-to-ope...windows-7.html

but ignore steps 1 and 2 and instead get Windbg.exe from here: http://www.microsoft.com/whdc/devtoo...g/default.mspx (It will be a much smaller/faster download than the link they offer.)
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post #4 of 4
I agree, memtest, memtest, and then a little more memtest. Maybe add a dash more memtest, and some memtest spice too.

If you think hardware is failing, test it first, ask questions later. It's kind of like the military, you always ask the questions later.

[edit] to set things right for mis-matched ram... generally if they can clock to the same speeds and timings you shouldn't have a problem, however they might clock at different voltages and that can cause a problem. Find out a timing/speed they can all run at and MANUALLY set the speed, latency, and voltages.

I would still recommend memtest, most systems can automatically set things but occasionally they can't (possible this situation) and then you will have to manually set things. I would manually set things if problems arise (like this) out of habit
Edited by mushroomboy - 2/9/11 at 11:35am
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