I just purchased an EVGA GTX 280, and it performs nicely, but my only issue is it makes buzzing noises under load. Can anyone tell me if this is normal for these cards or do i need to send it back?im just worried that even though it works good now, something may go wrong with it down the road. It makes a sound like electricity buzz and its quiet but enough to notice. Its not my power supply i already checked. Specs E8400 3ghz, EVGA GTX 280, 4 gig corsair 6400, OCZ 700 watt modxtreme pro psu, intel motherboard