Why cant i have HDR enabled with my X800XT PE in oblivion, when i can have HDR in Need For speed Mowst wanted, well it looks like HDR in Need For Speed Most Wanted, but i know for a fact i can have HDR in Half Life 2 Lost Cost, so why is this?
It is, to my understanding, ATi and nVidia cards render HDR differently from each other. For example, full HDR will not run Far Cry with your card but will with the NV6 series. Oblivion requires Shader Model 3 support to utilise full HDR which your card does not have.