Okay, so I think I've settled on ATI's Cypress GPUs, hopefully the XFX Radeon HD5870 and at the very least a XFX Radeon HD5850 , as Nvidia's Fermi GTX 480/GTX 470 appears to be very power hungry and possibly be a disappointment in performance due to the expectations raised by its tardiness and new architecture. For sure, I know both the HD5870 and HD5850 can barely fit in the Antec 300 and I'm somewhat sure my power supply can handle those two cards, though extra verification would be exceptional.

Now I have another predicament that rears into view. I need a wireless network adapter preferably one that is internal. Right now, I have 2 Airlink 101 AWLH4130 cards in my old Dell Dimension 1100 and my most recent system. Though the card works in my old system running Windows XP Home x86 SP2, it doesn't work with Windows Vista x64 SP2. I guess I have narrowed that down to driver problems as the power light blinks for both PCs but doesn't work with the new PC. I have 2 options right now, feel free to suggest other cards also, but without further ado: D-Link DWA-556 Xtreme N PCI-E x1 Desktop Adapter or D-Link DWA-552 Xtreme N PCI Desktop Adapter . What do you guys think taking into consideration the placements of my expansion slots on my Asus P7P55D Pro Motherboard as I will be using the main dark blue PCI-E 2.0 x16 slot for my a new video card, which will be dual-slot, and in the future, I am thinking of a USB 3/SATA 6 card , which I believe uses the black PCI-Express slot on my motherboard?