I got fed up with my HD4870X2 sounding like a 747 on takeoff under heavy load, so I got myself the Arctic Cooling Accelero Extreme 4870X2 and ripped the stock cooler off. As some of you might know, the screws used on the stock cooler's X-shaped back-brackets are a bit too short to reach the Accelero (The manual says to re-use them on the Accelero) and quite a few HD4870X2 cards died when the owners tried to get from to fit and applied too much pressure. A new version of the cooler is out (That includes 8 longer screws) and owners can request longer screws from AC for free, but that takes time. I got the old version, unfortunately, and didn't want to try and force the card (Nor wait for new screws from AC, since that would take a long, long while), so I started looking for replacement screws. I didn't have to look very far, and here is the solution: The small screws on the rear of the stock cooler (The side of cooler making contact with the card) which hold the plastic cover to the cooler itself fit perfectly in place of the too-short screws. Voila, problem solved ! Here are the screws marked: Just thought I'd share it. I hope this helps someone else out.