i think theres something wrong with my video card cause ever since i used auto tune on catalyst which didnt work so i reverted back to default clocks, ive been getting ghost like effects in games. like in crysis if i aim down the sights of a gun that image will be stuck on my screen for like 30 seconds. i just wanna make sure this is a graphic card problem and not anything else before i warranty it. is there anything i can download to test it? and theyl definitely take it back right?its a sapphire 4890.