numeriK wrote:

After further testing I actually found that the proprietary Diamond drivers are compatible with 100% of the games/benchmarks I throw at it - whereas the Detonators were working when they wanted. These results only happened for Windows apps/games, as MS-DOS wasn't affected.

numeriK, could you share the Diamond driver package you were able to get functioning with your TNT card and an Am5x86? I thought you might be using the Diamond driver package with filename w9xv5555.exe, however when I try GLQuake or Quake II with this driver, I get an illegal instruction type of error and it closes. When I use a POD83, GLQuake and Quake II work fine though.

I was finally able to score a Diamond Viper TNT 550 for testing.