Actually you would make a profit selling the PCI card and buying an AGP one ...
But depending on were you are located selling and buying might be too troublesome, I wouldn't do it for the minuscule performance increase.

jwt27 wrote:

Just did a quick test myself (with Phil's industry-standard benchmark suite). Using a Coppermine 7.5x100, PCI 1/3, AGP 2/3. […]
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swaaye wrote:

jwt27 wrote:

IIRC the AGP version is much faster than PCI, under DOS. Guess that's because of the 2x AGP bus clock, providing faster access to frame buffer memory.

Even on a stupidly fast CPU (relatively) it doesn't matter.
http://old.vgamuseum.info/benchmarks.html

Just did a quick test myself (with Phil's industry-standard benchmark suite). Using a Coppermine 7.5x100, PCI 1/3, AGP 2/3.

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1                              | 3DBench2 | PCPBench | Doom | Quake 
2------------------------------+----------+----------+------+-------
3Compaq V3-3500 AGP 16MB SDRAM |    048.0 |    220.0 |  458 | 141.3
43dfx   V3-2000 AGP 16MB SDRAM |    050.3 |    220.1 |  460 | 141.5
53dfx   V3-2000 PCI 16MB SGRAM |    824.7 |    206.3 |  701 | 135.5

PCI does seem to be slower, especially in Doom and 3DBench, but not as much as I expected.

Why is the V3 3500 slower than the V3 2000?

Probably just measurement error/variability. 3DBench is also a bit flaky in general.