I was doing some quake 2 benchmarks today witha 4500 pci and a 5500PCI and a 5500 agp.

Tested PCI cards in an ABIT NF7 nforce motherboard with amd 2500+ 1gB ram 2x 512mb (dual channel)
Tested PCI and Agp card in my a7a266 motherboard with amd 1700+ 1gB ram 1x1gb

Agp card was the fastest with the slowest processor, the 4500 pci was faster with 2xAA with the slowest processor and faster at higher resolutions. The 5500 pci was faster with the slower processor at 2xAA and 4xAA.

Testing was done at:
640x480
800x600
1024x768
1280x960
No sound and with no AA, 2AA and 4AA (5500 only),same memory type used in both boards.

Strange results ?

In other words: the PCI-cards in the nForce2 system are slower than the AGP/PCI-cards with ALi M1647 chipset? Maybe the PCI/AGP-bus is faster in that motherboard .

I've also seen a Pentium III-S 1400 with i815 which scores better with Aquamark 3 than a Pentium 4 3.8GHz with i865PE . It's not always a matter of CPU-speed .

Well, I've done some more benchmarking with quake 2. I think in the higher resolutions I have found the maximum fps the card will do regardless of the CPU., with little difference between the PCI and th AGP cards.
In lower resolution there is a larger difference between AGP and PCI with improvements using a faster CPU as well.

All tests done with same drivers, OS ect

Asus A7A266 amd 1700+ 1gb pc2700. Windows 98se
3dfx voodoo 5500 PCI  Amergamerlin 2.9, Quake 2 (3.2) (demo1.dm2)
Resolution      No AA      2xAA      4xAA
  640x480      252        171.2      103.5
  800x600      208        130.2      70.4
1024x768      153.5      88.6      44.7
1280x960      108.4      59.3      28.6

Abit NF-7 amd 2500+ 1gb pc3200 400mhz dual channel. Windows 98se
3dfx voodoo 5500 PCI  Amergamerlin 2.9, Quake 2 (3.2) (demo1.dm2)
Resolution      No AA      2xAA      4xAA
  640x480      246        161.7      92.9
  800x600      196        117.8      64.3
1024x768      145.5      79.9      41.9
1280x960      103.1      53.1      27.1

Epox 8K3A+ 1gb pc3200@333mhz single channel. Windows 98se
3dfx voodoo 5500 PCI  Amergamerlin 2.9, Quake 2 (3.2) (demo1.dm2)
Resolution      No AA      2xAA      4xAA
  640x480      228.2      158.0      92.0
  800x600      189.6      116.6      63.9
1024x768      145.5      79.3      41.8
1280x960      101.7      59.0      27.1

Epox 8K3A+ 1gb pc3200@333mhz single channel. Windows 98se
ATI Rage Fury Maxx  Quake 2 (3.2) (demo1.dm2)
Resolution      No AA      2xAA      4xAA
  640x480      220.1        n/a         n/a
  800x600      165.7        n/a         n/a
1024x768      113.8        n/a         n/a
1280x960        n/a          n/a         n/a
1600x1200    48.9          n/a         n/a