I have been using these for a couple of days now and they DO increase performance...However , In Crysis and in BF2 , both of which AA is working for me , every now and then I get a weird flashing , in Crysis it happened in the warehouse's around the docks where your taking out the AA guns and the Battle Cruiser docked at the port. Inside the warehouse's it was very foggy and it flashes from normal to foggy as I move through the shadows. Also outside after blowing up the cruiser the sky flashes if you look at the sun in a certain way , not all of the sky just parts of it. This never happened before. In BF2 , on SF: Surge near the missile launch pad , I was laying down near one of the metal barriers after playing for about 2 hours with no problems and VERY good performance , I moved into a shadow and my screen started flashing like my Video cards were going out!! then I moved out of the shadow and played for another hour with no issues?? I checked the temps immediately after exiting the game and everything was normal , one card was 54C and the other was 55C and both recovered to normal temps just as they always do.. I really want to like this driver , the IQ for ME at 1680X1050 everything on High detail (and some on VERY high) on Crysis is the BEST I have ever had and the explosions of the tank level were a sight to behold as well as any part of the forest , but the flashing shadows and sometimes even the sky flashes....I KNOW this driver is a beta but this scares me. anyone else having similar issues?