![]() ![]() If you have free drive bays you can use the power from the drive bays to get some extra wattage. The Vega 64 is, but that's got even worse power consumption then the 56. None of these is anywhere near your budget. The really high-end AMDs, which are definitely supported, are even worse: The next one up (the 590, which has not been confirmed as working in Macs) is more like 300 watts: The 8 GB 580 seems to be fine unless you're doing torture tests, at which point you max out at 234 watts in Boost Mode, so I'm pretty safe. To figure out the power draw on an actual card you should probably google the card name and "power draw." This is my card: The motherboard will try to send more then 75 watts on one of those three circuits and something will burn out. The card will function fine, but it won't be able to go into TurboBoost mode (or whatever the equivelent is) and nothing crashes but your performance is limited. The card will not be able to function and it will crash, forcing you to restart the machine whenever you're about to get the performance you paid for. If the card tries to draw too much power one of three things will happen: 75 from the slot, and 75x2 from the two six-pin connectors on the motherboard. You might get to the point where the CPU is the bottleneck if you can't manage to max all your settings, but if there's a card that's going to do it, it would be a 780 or 780 Ti.Your issue is going to be that the MacPro only really supports 225 watt video cards. That being said, a Xeon in a 5,1 isn't going to have the same gaming performance as say an overclocked i5-4670K, since most games tend to rely on single-threaded performance. Keep in mind, OS X is ALWAYS going to have worse gaming performance than Windows, and if you're not concerned about a budget, then go for one of these options. However, I don't believe OpenCL and CUDA have been coded in yet might have to wait on NVIDIA for that performance spike. I haven't seen reports of 10.9.2 supporting the 780 Ti fully, but I have seen reports of a stable graphics driver using OpenGL in OS X. Look up some benchmark numbers, but realistically, the 780 is the best way to go at the moment. Unfortunately, the 780 Ti isn't supported in OS X at the moment, otherwise that would be the most powerful gaming card. ![]() The gaming performance in Windows outperforms a TITAN, especially if you don't need the graphics memory that comes with a TITAN. The GTX 780 is easily the "best of both worlds" card if you're looking for super high end. An opinion is irrelevant when performance numbers can show you the difference. ![]()
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