Chosen Solution
Hi guys, I want swap my old HD4xxx (2x6pin power from board) for RX560/570/580 (1x8pin). But I am not sure what will be best power option ? All RX 5xx have max 225W what should be OK for board so no need PSU modification. Power over PCIe is 75W + 1x6pin 150W = 225W - it’s on the edge. And Also most of the GPU have 8pin instead 6pin so I need different cable. But instead 6pin->8pin I like to use 2x6pin -> 8pin. Will this solution (2x6pin to 8pin) take power from both 6pin connectors from board + pcie ? So I don’t have to worry about any crashing etc? Any ideas welcome, but I’d like to avoid modifying the PSU :)
The logic board is not designed to support that much power. Think of it this way… You plug into a single outlet two large space heaters the current load will cause the outlet and the house wiring to over heat, it might even set the house on fire! So in your case as you load up your system there is nothing stopping you from going to far. I would recommend you find 2012 MacPro in the long haul it will be cheaper and you might even get a better system! Or one that can support what you want.
