Videocard Overkill

Ask the Doctor LogoI have two older systems: an Asus A8V-VM board with an Athlon X2 4800+ at 2.5GHz, 4GB of OCZ Platinum DDR/400 RAM, and a GeForce 6200 in a PCI-E x16 slot; and an old OEM eMachines board with an Athlon X2 6000+ at 3.0GHz, 4GB of OCZ Platinum DDR2/800, and onboard GeForce 6100 graphics, with an empty PCI-E x8 slot.

I want to upgrade one of them with a Radeon 5000 series to hold me over until I can put together a Lynnfield system. My concern is that both of these boards only have a PCI-E 1.0a slot. Would I notice any real performance difference between the Radeon HD 5750 vs. the 5970? Or would I just be wasting my money on the higher-end card?

—Tim Brown

Read the Doctor's answer for Tim after the jump.