I've had this HIS ATI Radeon HD5870 since February or March. Since maybe late May it's been making a sort of loud whirring fan noise (not quite grindy, but gritty sounding) for about 5-20 minutes after boot. I can leave the computer on for days after boot and I won't hear it again until I reboot. Is this a common kind of fan problem for this card? What causes it to only whir after bootup and not just on low loads? Is this indicative of a possible card failure in the future?
1. Check the fan for dust,
2. Slightly "jiggle" the fan. If it wobbles, your fan may be broken. I had a similar problem.
3. spin the fan and make sure it spins freely and doesn't stop after released.
I had returned my 5870 for an RMA, after the 3rd they gave me a refurb and the fan had a weird gritty sound to it at times especially when at a higher speed. Sent back for a 4th RMA and they send me a new model