Hi, I bought a computer brand new off ebay it worked a treat. I then bought a few bits and pieces (DVD RW drive, memory card reader etc) and installed them, they work fine. However, when I put the 8800GT in the motherboard and plugged everything in it refused to boot (fans spinning etc but nothing on screen). A friend had a look and told me that my power supply was too low. My friend also tried the graphics card on his computer and it worked fine. So having bought a new 500watt PSU I tried again but the same thing happened. Having done research on the internet I found out that the PCIe slot on my motherboard I had been using "wasn't backwards compatible" or words to that effect. (That motherboard is a small MSI, not sure of exact model). I then bought a new motherboard off Aria (ASUS P5KPL-VM) which should have worked with my graphics card etc. I plugged it in and wired everything together and with or without the 8800GT my computer doesn't boot, the CPU fan is also running at about half speed. Is this something wrong with this motherboard? Any suggestions about the graphics card? Can it work on my old motherboard etc? Any help would be greatly appreciated. Thanks, Chris.