The GeForce 8800 series cards can all ensure a comfortable level of performance here. The min speed of the junior models is never lower than 37-38fps even at 1920x1200. This is more than enough for any real-time strategy (you can recall Command & Conquer with its speed limiter set at 30fps). Note also the very small delta of min and average speed of the GeForce 8800 GTS and GTS 320MB in high resolutions.
The results of the weakest GeForce 8 varieties aren’t so brilliant. The GeForce 8600 GTS allows playing in 1280x1024 more or less comfortably, but the GeForce 8600 GT is unlikely to maintain the same speed. The GeForce 8500 GT fails yet another test. This graphics card is obviously not meant for gamers.