As tested with Gtester2:
One Nvidia 7900 GTX (512 mb)
1920 by 1200 resolution
normal mode, 10 second load time
FPS over the canyon: 115.60
FPS over water and terrain: 79.80 ( I had the same white water areas as others reported with Gtester2).
However, my usual AH game specs are:
Dual Nvidia 7900 GTX's (running SoftTH in NON-SLI mode, through 3 panels in 3968x1024 resolution), I typically get 20-30 FPS in-game with this setup, using hi-rez packs and 1024 textures. One card drives the software across 3 panels and the other card, non-SLI'd, is a pass through for the third monitor. Gtester didn't use this SofTH's software has to be placed in the game folder to work. Don't know if it matters for the test, but it may under playing conditions.