DirectX8 VS DirectX9

Painkiller · Post by **Painkiller** » Wed Jul 07, 2004 6:21 pm

I compiled sample 2 in the tutor section and tried comparing frame rates between DirectX 8 and 9 renderers. Results:

D8: 125-130 fps
D9: 40-50 fps

Why is it that D8 has better performance than D9? Is the D9 renderer still early in development or what?

Felipe · Post by **Felipe** » Wed Jul 07, 2004 6:36 pm

that's odd. I get the same framerate in either. Though, I prefer using the OGL render, despite the fact that it's a little bit slower. DX8/9 seem a bit unstable on my PC.

thesmileman · Post by **thesmileman** » Thu Jul 08, 2004 1:49 am

I have a DirectX 9 card and I get almost identical if not identical frame rates with 8 or 9 and they are usually better than OpenGL

Electron · Post by **Electron** » Thu Jul 08, 2004 12:36 pm

I get about the same with all three. Perhaps you don't have the latest drivers for your video card, you only have DX8 drivers. My card doesn't support DX9 in hardware (Radeon8500) but I've got DX9 drivers so DX9 stuff still runs decently

Peter Müller · Post by **Peter Müller** » Thu Jul 08, 2004 3:10 pm

:/ in my games, dx9 is much (20%) faster then dx8

DanyATK · Post by **DanyATK** » Thu Jul 08, 2004 3:33 pm

Probably is a driver problem...

Dx8 and 9, normally gets the same frame rate and are a bit faster than opengl

ZDeveloper · Post by **ZDeveloper** » Thu Jul 15, 2004 4:49 pm

I think there some different things which are important.
first thing there are drivers. new drivers are always good

2nd thing there are hardware. if you have hardware which support DX9 then the programm should run faster, I think
3rd thing are the application. If you don't use DX9 things in your application, why should DX9 be faster then DX8? It isn't because it is the same thing.

I think: DX9 - DX9 Features=DX8

If I am not right, then said it please.