I've got a HP Compaq 6720s running windows Vista (don't start!). Here's my full setup:
HP Compaq 6720s Laptop
Intel Celeron M 550 @ 2GHz
HP 30D8 Motherboard
HP 68MDU Ver F.0D BIOS
It was running with just 1GB of ram and was really starting to go slowly so I decided to upgrade. I bought 2 x 2GB DDR2 800MHz Corsair RAM boards. Now, I know I wouldn't get the full 4GB RAM usage, on account of using a 32-bit OS. But that's not the problem.
I think one of my ram slots is faulty. I know both the ram units work as I've tried them individually with no problem. They always work in the first slot. When I put both units in though I get the BSOD when Windows tries to load up. I went into the BIOS and it sees that there is 4096MB ram. However when I run the memory test with both units in it gets to 25% and then the display goes funny, and I can't tell if it is continuing the test because much of the text is illegible.
So that's it really, both RAM units work but when used together cause my computer to fail. Basically is there anything I can do or is there anything obvious I've overlooked as an enthusiastic but inexperienced upgrader?!
Thanks for your help!