I recently purchased a new 9800 GTX+ and a BFE 550 Watt Power Supply After correctly hooking up the cables and booting up my system, It fails to boot due to not detecting the hard drive. I have tried many cable configurations and tried putting in my old hardware that I upgraded from. Each with no luck. I am not very savvy in BIOS, I am running a Biostar motherboard. and from what I can tell the BIOS is not detecting the hard drive either. Any suggestions?

Check the hard drive cables, to make sure they are completely inserted. SATA cables are particularly susceptible to being jostled loose.

I've checked the cables over and over for the past couple of hours, I am 100% positive that they are correct. I am currently running my machine on the old hardware, 285 Watt PSU and my 8600 that I had taken out of it, still not detecting the HDD

It's hard to believe that the drive would fail coincidently with your being inside the box, but I guess it's possible. Did you swap the power cable? The female pins on them will sometimes get spread and fail to make.

I believe I have debunked it, just want your opinions. I hooked my SATA HDD up to my roommates PC. due to him only having 1 SATA port open(which was the one his HDD was hooked up to) I had to hook my HDD up as his master drive. Without adjusting the jumpers, I booted up the computer, and just as on my PC his also did not detect my HDD. Therefor that would conclude the the drive is dead, correct?

If his bios is set to auto detect, I would say the drive is Kaput, but the timing is sure strange. Is the drive spinning? If not, I wonder if the motor bound up. Some times a sharp knock will free it up temporarily, long enough to save some data.

Thanks for your input. just got back with a 1TB Seagate HDD. Everything is up and going and I am installing windows now. So the problem was: Dead Hard Drive. Odd Timing indeed.