Prey

Scaling Test

The AA/AF scaling under Prey is very different from under most other titles, because the shadows are stencil-based. The G8x's ROPs become a limitation, especially so as the AA levels go up. The reason why this scaling was analysed rather than, say, CoH's is that it is rather unusual and might be interesting in the context of the upcoming Quake Wars: Enemy Territory title. AF, on the other hand, seems extremely cheap on both cards, which is rather surprising for G73! Timedemo-specific, perhaps...

Head-to-head

The performance hit of HQ is related to the extra depth and stencil tests required probably more than the extra bandwidth; Prey has clear ROP limitations on G8x. The samplers, on the other hand, show their worth.