4) If you have an addition hard drive in your mac, or you have an empty HDD or the one you can tinker with, go to Disk Utility and create a partition on it as FAT. 3) Insert the 5770 in your mac in PCI-E slot 2 and connect the power cable. 2) You need to have a working mac graphics card in your system in PCI-E slot 1 just so you can do all this without problems and so you don't need a PC. These are the cards you want to use for the seemless flashing: 5870 - 5770 - Here's what needs to be done, not really a huge issue: GUIDE: 1) Get the ATI 5770 or 5870 card linked above. I'm using it in Mac Pro 3.1 (early 2008). Then you can use most Nvidia and ATI cards these days right out of the box on your mac without the need to flash anything.įlashed ATI 5770 (possible for 5870) to work in Macs. I strongly encourage you guys to not use this guide and just upgrade to Lion. Any ATI 5xxx series and I think even ATI 6xxxx series cards excluding the 6890/6990 will work out the box with OSX Lion. Working mac graphics card in your system in PCI-E slot 1 just so. Right out of the box on your mac without the need to flash anything. PC ATI 5770/5870 cards flashed to work with Mac Pro. A card flashed with a Mac BIOS will be able to work at PCIe 2.0 speeds, supporting twice the data rate. When installed in a Mac Pro a stock PC GPU will only be able to utilize the outdated PCIe 1.0 format.
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