VOGONS


First post, by mbliss11

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Got a new board over the weekend and I am trying to figure out a quirk that it has related to AGP and DOS benchmarks. It appears that the AGP slot is somehow crippled in performance compared to PCI. Board is an Epox EP-MVP3C2 with BIOS VP3C0C21 from "CPU Upgrade: Getting the AMD K6-2+ / K6-III+ to work on your Super Socket 7 board."

http://web.inter.nl.net/hcc/J.Steunebrink/k6plus.htm

Currently it has a K6-2+ running at 500mhz and 128mb PC100. FSB is 100

I threw in my Voodoo 3 2000 AGP from my FIC VA503+ and was getting significantly less performance in Phil's DOS Benchmarks compared to the VA503+. I then tried a Riva TNTM64 AGP and PCI on the Epox and sure enough the PCI was getting much better frames in every benchmark. Very strange. Anyone experience anything like this? I have not tried benching in Windows yet but will be working on that today.

Reply 1 of 1, by mbliss11

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UPDATE: Did some more testing today testing in Win98 FutureMark99

TNT M64 AGP
3110
6904

TNT M64 AGPVIA4-1 Driver Standard
3146
6893

TNT M64 AGP VIA4-1 Turbo
3150
6947

TNTM64 PCI
3111
6835

DOS:

AGP - 3DBENCHV2 - 272, Quake 640x480 17.3
PCI - 3DBENCHV2 - 388, Quake 640/480 22.8

No K6WC or other MTRRs modifiers.

Its strange. I dug up a similar thread in doing some further research on the topic here:

PCI card faster than AGP for DOS games?