It has been a good while since I last did an upgrade. I had been having some trouble with Outlook on my #1 system so I decided to upgrade my old 754 machine. The In-Win case had the old In-Win Powerman 350 Power supply. I replaced that with a new Cooler Master 600 W, which has a single 12v rail. The case had a floppy, CD burner and a DVD burner in it and a 250 Gig HD. I replaced the 250 with a new 750. I had on the spur of the moment bought a new Gigabyte 890GPA-UD3H motherboard, 4 Gig of Corsair Dominator 1600, and a AMD 1090T X6 CPU. (I intended to get a 965 and a 790FX board, but this new stuff was there so no research just a wallet whapper) Earlier in April I had bought a 5770, Win 7 HP 64, and the 750 HD. I stuffed all this together and hit the power switch and it posted fine. Problem? Yes I can't get the DVD tray to open, I'll have to cannibalize another machine or buy a new one after work today. Always something!