Hi *******,I just wanted to say 'Thank You' for this great utility ! I Installed the latest version (after stumbling across this post), with the default config, and I've seen a significant performance increase with REX clouds using a single Radeon 5770 with 3 screen Eyefinity. It was really only dense clouds that had been causing me a frame rate problem. Now its no problem. I will try the REX Overdrive update this weekend and see how it is.Thank you so much for your excellent piece of work and let me know if you need me to test anything with my Radeon Sapphire Flex 5770 which I think is a great card for the money and Eyefinity is awesome !Freddy.Intel Quad Core, Win7 64-bit, Radeon 5770 3-screen Eyefinity(4320X90), REX, GEX Europe, FSG2010, VRinsight Multipanel.