Try some newer Glide 3.x games that would be more aware of the increased resolution rather than the just-before-the-voodoo2 glide games. MTM2's fixed to 640x480 max, that's normal (limited buffer write 2d graphics and all).

I tried to use the custom drivers in order to use 2 different branded cards and it worked but my framerate was exactly the same as with 1 card just making a higher res available, but the same framerate as using 1 card. It was weird. I gave up.

Retroclik wrote on 2022-11-18, 23:13:

Shouldn't it be 24MB ?

No, SLI won't really double the amount of memory.

-An other thing is that I can't raise the resolution in the 3DFX panel. Every time I put 1024x768, apply, and come back in the panel, the setting got back to 800x600. But it's kind of new, few days ago it was stuck to 640x480 (I haven't made any change)

That setting will only adjust the refresh rate for each resolution when the Voodoo2 cards are active.

Hello !

Thanks for your answers !

I realize I forgot to mention that I'm running Windows 98 SE.

@Gmlb256 : I also forgot to tell you, the thing is the memory listed in system info is the same when I have only one Voodoo 2 in the PC. Isn't it weird ?

@Shagittarius : Can you remember a game where you could use a higher res ? So I can try myself ?

@leileilol : Ok I'm gonna do that. It seems there are not so many of them if I believe this list : https://www.pcgamingwiki.com/wiki/List_of_Glide_games

Thanks again. I'll get back to you after more testing.

Retroclik wrote on 2022-11-19, 09:47:

@Gmlb256 : I also forgot to tell you, the thing is the memory listed in system info is the same when I have only one Voodoo 2 in the PC. Isn't it weird ?

SLI works by being redundant. Sure you have more memory physically, but the way everything has to be sync'd mean both cards must have the same textures loaded so it wouldn't mean *more* memory for that. Even worse is when it thrashes, the penalties would be slower as that means two cards to send textures to.

Run DXDIAG.EXE. You should see 16MB of video memory for Voodoo2 if SLI is working. As leileilol pointed out, only 8MB is effective for texture VRAM.

Ideally, the 3dfx control panel info with SLI activated will look like this: https://hardforum.b-cdn.net/data/attachment-f … 62_76OlWTSh.jpg

You could try UNREAL for DirectX and Glide for 1024x768 resolution tests.

Meatball wrote on 2022-11-19, 12:19:

Run DXDIAG.EXE. You should see 16MB of video memory for Voodoo2 if SLI is working. As leileilol pointed out, only 8MB is effective for texture VRAM.

Ideally, the 3dfx control panel info with SLI activated will look like this: https://hardforum.b-cdn.net/data/attachment-f … 62_76OlWTSh.jpg

You could try UNREAL for DirectX and Glide for 1024x768 resolution tests.

Ok thanks. My DXdiag says 16MB for Voodoo :

download/file.php?mode=view&id=150484

But the system info is really different than your image :'(

@Retroclik I was testing with both Quake III and 3DMark2000.

Retroclik wrote on 2022-11-19, 13:52:

Ok thanks. My DXdiag says 16MB for Voodoo : […]
Show full quote

Meatball wrote on 2022-11-19, 12:19:

Run DXDIAG.EXE. You should see 16MB of video memory for Voodoo2 if SLI is working. As leileilol pointed out, only 8MB is effective for texture VRAM.

Ideally, the 3dfx control panel info with SLI activated will look like this: https://hardforum.b-cdn.net/data/attachment-f … 62_76OlWTSh.jpg

You could try UNREAL for DirectX and Glide for 1024x768 resolution tests.

Ok thanks. My DXdiag says 16MB for Voodoo :

download/file.php?mode=view&id=150484

But the system info is really different than your image :'(

Remember- Ideally - you’re mixing different vendors, which is not ideal, and the 3dfx control panel is known to be glitchy.

If you can’t run any game like Quake III or Unreal, or benchmarking software like 3DMark 99 at 1024x768, you know something isn’t working.

If haven’t done so already, start individual card testing by removing everything and testing one card at a time (only 1 card in the system at a time) to make sure both are fully functional.

Other problems could be the chipset. I have some voodoo2 cards which won’t do SLI with some of the 440BX boards I have no matter how many times I reinstall or change up the install method, or use a different driver, but work fine on other 440BX boards or boards with a SiS chipset, for example.

Glad to see another French (or French speaking) person !

What about "touching" the chips during a benchmark/gameplay ?
Voodoo 2 does not dissipate a lot of heat, but you should be able to notice it.

@Shagittarius : I'll try those ones thanks.

@Meatball : Ok thanks good ideas I'll come back with other tests.

@acl : Touching them to see if they are overheating ?

acl wrote on 2022-11-20, 18:06:

What about "touching" the chips during a benchmark/gameplay ?
Voodoo 2 does not dissipate a lot of heat, but you should be able to notice it.

That is a good strategy, touch the silicon to feel if it does any work.
But a Voodoo2 can get quite a hot, especially with a fast CPU. Let's say a Pentium II 300 or faster where the V2 is becoming the serious bottleneck.

PD2JK wrote on 2022-11-27, 07:40:

That is a good strategy, touch the silicon to feel if it does any work.

Thanks !

Retroclik wrote on 2022-11-27, 07:24:

@acl : Touching them to see if they are overheating ?

Touching it just to see if it's working.
If the SLI is not active, only one card will work, so one will be hot (or warm) and the other will be cold.

Ok !

Retroclik wrote on 2022-11-19, 13:52:

Ok thanks. My DXdiag says 16MB for Voodoo : […]
Show full quote

Meatball wrote on 2022-11-19, 12:19:

Run DXDIAG.EXE. You should see 16MB of video memory for Voodoo2 if SLI is working. As leileilol pointed out, only 8MB is effective for texture VRAM.

Ideally, the 3dfx control panel info with SLI activated will look like this: https://hardforum.b-cdn.net/data/attachment-f … 62_76OlWTSh.jpg

You could try UNREAL for DirectX and Glide for 1024x768 resolution tests.

Ok thanks. My DXdiag says 16MB for Voodoo :

download/file.php?mode=view&id=150484

But the system info is really different than your image :'(

On my Voodoo2 SLI setup using Fastvoodoo2 4.6 I also see 16MB in dxdiag but in the Voodoo control panel System Information tab I see "Total Texture Memory: 8MB" even though it also says "Scanline Interleave: Detected!". It's working properly though - I get the expected additional performance and I can access the higher resolution in Windows and in games.