Been searching for something on what kind of experience people have from running a single 280x or 7970 in a Mac Pro 4.1 without an external PSU or using SATA power. Anyone who has actually fried/overheated/damaged their logic-board? Especially interested in those who have been running any of these cards in Final Cut Pro 10.3.x. While rendering I suspect the GPU goes full steam. I would also say that unless you have done the R17 mod, you won't be running it full speed, so… Let me know! For those who has been using SATA power, did you find a way to use power from other SATA-connectors than the optical bays?