Question Question about dual psu s in one system

Mar 26, 2019
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Hello, I have a mac pro 5,1 (newest tower) and I am adding a second graphics card to the computer. The computer supports one graphics card just fine, but the psu does not supply enough power to support two graphics cards. I purchased a HP 750w platinum server psu to add to the system. The HP power supply is just for the two graphics cards. I have already soldered everything up and it is ready to be plugged in, but before I do so I would like to know if anyone else has done anything similar with poor results. I am aware of the risks associated with doing this so I have been extra cautious when soldering everything and I plan to use a voltage monitoring software to monitor the pcie slot power draw to make sure there is no current back feeding through the motherboard. I have seen many people do similar mods on the mac forums, but I am still very nervous seeing as I use my computer on a daily basis. If anyone has any input it would be greatly appreciated. Thanks!