Greetings from Argentina! I'm in process of building myself a budget CUDA/OpenCL based color-correction/video post production workstation. After countless hours of reading this forum, I conclude in a 2009 4,1 Mac Pro. After updating it to 5,1 status, I'll throw an hexacore (maybe a W3590), and a dozen (or two) GB of RAM, using Mavericks or Yosemite. I'm planning to use a nVidia Telsa m2090 as video accelerator, complementing the GT120. I understand nVidia don't make Tesla drivers for the MacOS, but in a post by MacVidCards on Netkas Forum I learned the Quadro 5000 driver can control it. Is it true? If I don't missed the point, PCIe speed will be 2.0 in all 4,1/5,1 cMP. Am I correct? I don't care about boot screens ("m" series Teslas has no monitor out; only "c" series have), but I'm a little confused about TDP. Some places says 238W, some other 250, and the manual says "<= 225 W". Assuming the Pro can output a maximum of 225W using PCIe and the two "booster cables", is it possible to limit the TDP flashing the ROM? Perhaps it sounds like a silly noobie question, but I will not stress the PSU (nor install another supplementary PSU for the video card). So, if the ROM has to be flashed, manual says the BIOS is a "2Mbit Serial ROM", I assume there is plenty of room to flash whatever code is needed. I also understand a GTX780 is more powerful than the Tesla, with its aging Fermi architecture. Fact is, here down under video cards have excessive import duties and I can have the m2090 for peanuts. Besides, I won't be using Windows on this machine (maybe some day I'll try some RHEL like CentOS) Thanking in advance!!