I just recently bought my sapphire radeon 4870 off of ebay. The person said that it was lightly used and never overclocked. I installed it into my system with no problem, installed the latest dirvers. Than I try to play crysis on very high settings on a resulution of 1024x768. This video card should be able to play this game on very high with a higher resulution and easily get about 40fps. But When I play, I only get about 15fps. I have no clue what is going on here. I ran 3dmark06 on my system and only got a score of 9225. I have no clue what could be causing this. The average score for my video card is over 12000 I have heard people say that increasing the cpu multiplier could fix this problem. But since I have an amd Phenom Quad Core and 4gigs of ram I doubt this is the problem. I tried overclocking my card using the auto tune in the CCC but it went up to a 800mhrz core clock. When I tried to play crysis, bars come up across the screen and it crashes. Could you please assist me in fixing this issue? I have a 500 watt power supply. Thanks!