right i have a ASROCK dual sata2 motherboard im running windows xp64bit and i have just got a xfx 7900gtx with the clock speeds as 520/1500 problem is its not running at that its running at 520/750 i cant get it to run at the right speed i was going to RMA it thinking it is a bad memory problem just wondering does anyone else know why this would happen by the way im running this on hiper type r sli ready 580 watt power supply and im not experiencing any atrifacting what so ever playing bf2, im playing bf2 at max gfx settings with no problems!