Infinitely fast video cards don't exist. Right now, the Opteron and A64 look good. When single-CPU ones are out, and/or dual-CPU boards with AGP slots, I'll take benchmark numbers to actually mean something. If the description here of the null renderer is correct, then the AGP portion of the chipset, which we know *never* has an impact of performance, isn't being tested, even though in any real use you wouldn't have this situation. Similar issues to the PCI graphics.
It performs very well. That we know. Whther the P4 3GHz beats the 1.8 once an AGP video card is mixed in, we don't know, but the differences right now are somewhat limited in Q3A and UT2k3.