no, this is like putting a bigger turbo on a car, its only until you tweak the engine DME (adjusting the core/memory speed and voltages) that you're gonna cause a real problem. so long as when you overclock you do a google search and check out what other ppl have clocked their card to safely and you stick to about that you should be fine. the proper way to overclock is to steadily increase the clock speeds by 10mhz until the computer either crashes or doesn't run properly, then lower speeds back 10mhz and retest. if you wanna squeeze your card, you adjust the voltages up when it crashes and see if it runs better, if it does continue increase clock speeds and voltages back and forth until you hit the limit. which sometimes might mean frying your card, which you don't want to do.