Hi Everyone I have the chance to pick up a cheap ATI 5870 card. It's a reference design PC version and I'm wondering whether to snap it up and replace the flashed 4870 that's already in my machine. If I were to grab it, what would be my options? Can it be flashed to show a proper boot screen? Will Mountain Lion support it natively (unflashed) but with no boot screen? Am I right in thinking the performance increase between a 4870 and a 5870 is worth it? Many thanks for any advice.