I've been reading, researching, etc like crazy on flashing PC video cards for mac. Cindori's Post: The Golden Guide to Flashing Graphic Cards http://forums.macrumors.com/showthread.php?t=877441&highlight=4870 This guide is GOLDEN!! And rew's post: Step by Step: How to flash a PC 4870 1 Gig Video Card for your 2006 Mac Pro (1,1) http://forums.macrumors.com/showpost.php?p=7473867&postcount=886 Have been really helpful. ONLY my ATI Radeon HD 2600XT stock card in my 2008 mac pro, totally fried/died out. So I have zero video card (I'm using a PC laptop now). And the tutorials on how to flash a PC cards requires plugging in both the old card (using it while dumping the ROM) and new card. Have the same problem as this guy- Mac Pro early 2008 :: video dead ati 2600XT http://forums.macrumors.com/archive/index.php/t-755971.html I was looking into buy a Sapphire 4870 1G and I don't want to pay the $300 and plus already used flashed cards on eBay. The 4870 are cheaper compared to the 5870 at $400 plus. I was wondering if anybody got to flashing the 4870 using just the one video card on a mac pro 2008 (3.1)? I need a good video card to do 3D modeling in Maya and Mudbox. But don't want to pay double the price, or lesser choice for 'apple' approved hardware?