[sparkyxplode]

I hope I am posting in the right place...please let me know if not.

I am trying to upgrade my Dell XPS 600. I upgraded to Windows 7 Ultimate 64 and went for broke adding 8 GB of RAM. Now Windows freezes at the login screen and locks up to the only option of powering off. However I can get it to start in safe mode with all 8 GB installed. It shows it, it recognizes it, no errors come up. But the only way to get Windows to boot normally is to drop back down to 2 or 4 GB of ram. On several occasions I got a bsod with a System/Service/Exception error.

I don’t know if I made any sense here but any info would be great. Thanks in advance.

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According to Crucial.com this machine requires memory modules to be installed in matched pairs, otherwise it doesn't like it. The machine will take 8Gb of memory and it sounds like you're trying to mix various speeds, brands and what not.

[Neil Jones]

According to Crucial.com this machine requires memory modules to be installed in matched pairs, otherwise it doesn't like it. The machine will take 8Gb of memory and it sounds like you're trying to mix various speeds, brands and what not.

[sparkyxplode]

I checked that it was all the same, I even purchased it all at the same time.

All the RAM is PNY XLR8 800 MHz 4GB DDR2.

I tried installing in matching pairs, and in sequence, still no go.

I ran a compatibility check before I bought the RAM, and after install it shows in Bios, device manager and memory management.