Splinter Cell: Chaos Theory performance
The comparative performance improves as the 32 stream processors get busy handling the shading requirement in Splinter Cell: Chaos Theory. However, the older DX9 cards' separate pixel and vertex shaders do a reasonably good job at keeping Sam Fisher moving nicely, too.
HDR performance - where luminosity is more accurately calculated and portrayed on your display via tone mapping - almost brings the ECS N8600GTS-256MX to performance parity with the two 256-bit memory bus-toting cards.