DirectX8 vs Direct X9? (GTR2 & GTL)

[04 goat]

HI all,
Is there a performance gain (frame rate) by using the Directx8 shader over the Directx9 shader? (settings on the GTR2 and GTL config file)

Thank You

[scca1981]

yes.. even more if you choose direct x7.. there is a little GFX difference.. but then again while your racing you won't notice it that much..

[scca1981]

oh yeah i'd also like to note that if anyone has poor FPS the best thing you can do is change to dx7 for your shader... it should help a lot.

[04 goat]

yes.. even more if you choose direct x7.. there is a little GFX difference.. but then again while your racing you won't notice it that much..

Thanks for the feedback... I thought that direct x was only for the shader controls?

I have been experimenting with direct x7/x8/x9... I can notice the track textures/shading on x7 look different (i.e. - lower quality) compared to x8 & x9.

I am running 1680x1050 res (AF=2x, AA=2xQ), so I have been trying to optimize my graphics/frame rate in both GTR2 and GTL.

Thanks

[David Wright]

I think it depends on your video card. Older cards such as the GF5600U I had when I ran the GTL demo had very different performance in DX7, DX8 and DX9. Modern cards should have little difference. I agree, visually the biggest difference is between DX7 and DX8. The difference between DX8 and DX9 is more subtle.

[Freddyfartbox]

Alot of the converted tracks for GTR2 suffer from poor FPS or FPS spiking on my system, so I changed to DX8 and it's improved immensely. The FPS still goes up and down a bit but it's much smoother and more playable, with little to no noticeable loss in graphics quality.

[Midi]

I have Radeon 9800SE and got better fps with dx8 than dx7 or 9.

[Dzul]

I have Radeon 9800SE and got better fps with dx8 than dx7 or 9.

Hmm... :uhm: Worth a try on my good old 6600TD... :D Thanks!

[Hansaplast]

If you like Brands Hatch for GTR2 you have to keep it at DX9,
or it will not work.

For all other tracks and even rFactor i prefer DX7,
cause nothing is more important to me than as much frames as possible
in a racing-sim.:)