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Large discrepancy in Win98 graphics performance of X850 XT PE

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First post, by xtreger

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I'm building a Win98 retro project of my own, using a PCI-e motherboard along with ATI Radeon X850 XT PE. For comparison reference, I used this video: https://youtu.be/abYeIixYrbk?si=zwENhTIkGUDwhTDQ&t=770.

But for some reason there's quite a gap between stats in that video vs. what I'm getting. The person in that video is using a P5PKL-AM SE, with 1 GB RAM, X850 XT PE, C2D E8600 processor, Win98. I'm using P5PKL-AM PS, with 4 GB RAM, X850 XT PE, C2D E8500 processor, Win 98. The Win98 3DMark 2001 SE score in that video seems to be 37k for this setup. However I'm getting 30K score. Also his avg. FPS for Quake 3 is around 600 or so at 1024x768 resolution, while I'm getting slightly more than 400 (I've been careful to match the display settings).

Also, using another one of that person's video, I compared performance in WinXP too. There the performance in 3DMark 2001 SE was matching - around 40k.

So I'm a bit confused - what could be the reason for the large discrepancy in Win98? I've matched the hardware (almost) and the VGA driver.

Reply 1 of 5, by bloodem

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Most likely, it’s because you are using 4GB of memory (a known issue).
Drop it to 2 GB or less and performance should greatly improve.

1 x PLCC-68 / 2 x PGA132 / 5 x Skt 3 / 9 x Skt 7 / 12 x SS7 / 1 x Skt 8 / 14 x Slot 1 / 5 x Slot A
5 x Skt 370 / 8 x Skt A / 2 x Skt 478 / 2 x Skt 754 / 3 x Skt 939 / 7 x LGA775 / 1 x LGA1155
Current PC: Ryzen 7 5800X3D
Backup PC: Core i7 7700k

Reply 2 of 5, by xtreger

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bloodem wrote on 2024-02-20, 04:24:

Most likely, it’s because you are using 4GB of memory (a known issue).
Drop it to 2 GB or less and performance should greatly improve.

Whoa this is unexpected. Is this really true? So a dual channel 1GB + 1GB memory will work better than 2GB + 2GB memory?

Reply 3 of 5, by bloodem

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Truthfully, you don't really need dual channel for Win 98 (the performance difference between single and dual channel is negligible).
Just one 2 GB module will do just fine.

1 x PLCC-68 / 2 x PGA132 / 5 x Skt 3 / 9 x Skt 7 / 12 x SS7 / 1 x Skt 8 / 14 x Slot 1 / 5 x Slot A
5 x Skt 370 / 8 x Skt A / 2 x Skt 478 / 2 x Skt 754 / 3 x Skt 939 / 7 x LGA775 / 1 x LGA1155
Current PC: Ryzen 7 5800X3D
Backup PC: Core i7 7700k

Reply 4 of 5, by xtreger

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bloodem wrote on 2024-02-20, 05:55:

Truthfully, you don't really need dual channel for Win 98 (the performance difference between single and dual channel is negligible).
Just one 2 GB module will do just fine.

Wow you were absolutely correct, thank you so much! After removing the extra memory stick the 3dmark score increased to 36.3k! Very strange and unexpected behavior though for win98...

Reply 5 of 5, by bloodem

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You're welcome, glad it worked! 😀

1 x PLCC-68 / 2 x PGA132 / 5 x Skt 3 / 9 x Skt 7 / 12 x SS7 / 1 x Skt 8 / 14 x Slot 1 / 5 x Slot A
5 x Skt 370 / 8 x Skt A / 2 x Skt 478 / 2 x Skt 754 / 3 x Skt 939 / 7 x LGA775 / 1 x LGA1155
Current PC: Ryzen 7 5800X3D
Backup PC: Core i7 7700k

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