did you try it with the ICD (full OGL driver) or D3D?

could also try one of the updated MGL files from falconfly, i'm not sure if later game patches updated that, so it might still be targeting only V1/V2...

i will try ICD and i tried MiniGL 1.46 , 1,47 and 1.49 .

Ok so i disabled MiniGL and just used OpenGL , it locked up within a minute and the screen was all garbled.

And now Direct3D , no lock ups , runs ok until there's big explosion and it turns into powerpoint for a second , and hwne i exit to main menu i get black screen and have to End Task in Task manager , but no Lock up.

You could try the MesaFX 6.2 opengl32.dll. For me on a voodoo 2 it would play the game but hang when switching between game and menu. But if nothing else is working for you it's worth a try.
Also, you could try the 3dfx opengl driver included in Return to Castle Wolfenstein. There were two drivers included, one for voodoo 5 and one for other voodoos. They were from WickedGL I think.
You cen rename these to opengl32.dll and try them in your HL game folder one at a time.

So i did install MesaFX and WickedGL 2.99 , it just locks up , same as before , 5 minutes .

There's plenty of videos on the internet of people playing HL on banshee. Phil has one here. So there doesn't appear to be a common driver issue with this game.
https://m.youtube.com/watch?v=eIOrPLjph7k
Doesn't seem to be hardware issue either as you can play American Mcgee's Alice. And you've tried things like adding a fan.
I would suggest uninstalling any drivers for the on board Matrox to see if it makes any difference but that's just a wild guess.
Can you try with Win 98 instead of 2000 in case it's a weird W2K issue?

Well well well , so i did find 40hdd and put Win98se on it , it ran flawless . So it would seem it is indeed Windows 2000 problem .

Thanks man

What version of Half Life is installed?

i used 1.0.0.9 and 1.1.1.0 , both had identical issue on Windows 2000

But right now i keep it at 1.0.0.9

Hm. I'm not really sure why the latest patches would cause problems with a Voodoo Banshee.

DirectX version?

Not sure what you are referring to , Game , Banshee drivers or Windows ?

Here you go i guess

win2k has some type of win9x compatibility mode if i recall, might be worth a try.

What version of DirectX are you using in Windows 2000, I mean.

i have fully updated Windows 2000 ,so i guess it has DirectX 9.0c , i don't use KernelEx.

So i somehow solved it , i decided to completely remove 3dfx software and drivers from the pc .
I went with the BansheeTeam Evolution V0.9 drivers , installed MesaFX and WickedGL , disabled the Matrox card in Device manager as i cannot disable it in BIOS , reinstalled the SB Audigy as well just to be sure , and it worked somehow , it no longer locks up and runs very good , so i went and tested the other games if they still run , American Mcgee's Alice and System Shock 2 ran as good as they did before but Gex Enter the Gecko had occasional artifacts and bad fps drops , and after 5 minutes it locked up .
So i decided to mix and match Glide DLLs , i downloaded IceMan Driver V1.03.00 and and took glide2x and glide3x DLLs from it and replaced the Banshee Evolution ones, and it worked , no artifacts , running well and no Lock ups ... what an ordeal this was.

I would like to thank everyone for their effort and tips here , i am very thankful .