One of the two fans on my MSI Geforce GTX 560Ti's Twin Frozr II cooler is failing, causing a loud vibration noise every time it tries but fails to spin up. This of course is also resulting in higher than average temperatures. A brief look at Furmark saw it hit 90C after just a minute or two. Is there anyway to fix the faulty fan or should I consider buying a replacement card? I'm fairly certain the warranty has expired so that option's out. If I have no choice but to replace the card, any recommendations in the £200-£250 price range? I prefer Nvidia but might consider AMD if it's truly a better deal.