These test results are interesting as the GeForce GT 240 was running even slower than the GeForce GT 220. Under Microsoft Windows, this graphics card has been shown to certainly outperform the GeForce GT 220 by a large margin, yet with the current Linux driver, this is not the case -- it is definitely slower than the GeForce GT 220. With the second test system we used running the stable NVIDIA Linux driver, the GeForce GT 240 remained slower than the GeForce GT 240.
With VDrift, an open-source drift racing game, the GeForce 8600GT ended up being even slower than the GeForce GT 220/240.
The GeForce GT 240 struggled again. Oddly, the GeForce 8600GT even is having issues with Enemy Territory: Quake Wars compared to the GeForce GT 220.