You need an AGP 8X graphics card for one.
AMD ATI Radeon series:
1) Better: XFX Radeon HD4650
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4914257&CatId=2234A) 1GB (OR 1024MB) of DDR2 graphics ram memory
B) 128-bit bandwidth memory interface
C) 320 Stream Processors
D) 600MHz Core Clock
E) 800MHz Memory Clock
F) 55nm process technology
3) Best: HIS HD4670
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6076197&CatId=2234A) 1GB (Or 1024MB) of DDR3 graphics ram memory
B) 128-bit bandwidth memory interface
C) 320 Stream Processors
D) 750MHz Core Clock
E) 1600MHz Memory Clock
Likes POWER! Better install a 500 Watt power supply, to keep up with the power needed for this baby!
The GX260 supposedly has a 250 Watt PSU. (Power Supply Unit)
Back in the day this PSU was made, the PSU manufacturer 'fudged' the maximum rated wattage.
Actual is more like 60 percent of what is stated.
175 watts!
The above is just IMHO about graphics card choice.
(I have motherboard's with a PCI Express x16 slot, using the PCI-E 2.0 technology.
I use Nvidia graphics cards)