ATI Performance boost, maybe?

[mH.Suicider]

http://www.beyond3d.com/forum/viewtopic.php?t=14874

This guy says it'll boost performance on ATI cards up to about 40%. I can't test it, since I'm on a crappy nvidia card for now... someone wanna try this and say how it works?

update: My roommate tried it on his 9700 Pro. In conjuction with the 4.9 Doom beta Catalysts, it gave him a very large boost in pure lighting situations; his average fps via timedemo went from about 45 to 65. Neither of us could see a difference in the image quality, so it's free performance.

[Janus]

Bumped up mine, im gonna try upping the resolution/qual and see if i still get good frame rates, I went up to about 60-65 with 800x600 - medium. Still having the problem with crashing though, im gonna try lowering my cpu OC and see if that fixes my problems.

[Nas-T]

Bah, this shit is confusing. How do you edit the interaction.vfp file in winrar? It just lets me view it, but not edit it. :/ And I don't know how to associate it with notepad, either.

EDIT: Nevermined, I got it. Yeah, I'm getting better performance out of my 9700 pro with this. Thanks for the link.

[Chem]

I've been following this thread for about 3 days now.
The latest tweaks are interesting
Force 16x AF via the control panel
And add those lines. I went from 24 fps to 37 in the timedemo because of this tweak.

Athlon 1700+ @ 2000+
1gb of mixed ram PC2100/PC2700 :\
Radeon 9800 Pro 128mb. Stock speeds

I'm mostly cpu limited but I'm getting decent frames in 800x600 D:

[mH.Suicider]

Followup, Carmack responds to the issue:

http://www.beyond3d.com/interviews/carmack04/index.php?p=2

Basically, it just reduces the quality of specular highlights a little bit. Worth a big jump in fps, imo.