When finally installing MediaLab and DirectRT on our Lab PCs, we encountered that regardless of the refresh rate we selected in Windows DirectRT detected a refresh rate of 75Hz. Luckily I remebered that some years ago when I was younger, these OSs new and I was into gaming (first-person-shooters), there was this bug: Under certain display drivers and certain (now older) Windows Versions DirectX always used 60 or 75 Hz. Even more luckily I rembered that there was a solution for this problem: You need a program like Refresh force. Its sets the refresh rate to a specific rate which is automatically detected. Works fine and solved the problem on our old Win2000 lab PCs, which now work in 100Hz. And the best: It's free and works with all graphic cards, drivers and monitors. Just download from the homepage: http://www.pagehosting.co.uk/rf/

Henrik