Hey guys ! I'm not really into modding my macs power supply, adding an additional PSU or performing the mod Pixlas came up with. Because of this I went into search for using another method to supply both GPUs with power. At this moment I'm using the SATA power of the optical drive area (can't really care about losing 2 drive bays) I'm planning on buying PCIe extension power cables to wire the power cables via the back of the case up to where the power cables are located behind the removable wall in the optical drive bay (having the lid of isn't ideal nor sexy with those cables sticking out) I've also tried using the SATA power in the numbered drive bays but that doesn't seem to work :/ I've also come across a possible solution where you don't lose 2 SATA ports which would involve using one of these (the price is stupidly expensive but you get the idea of the cable), and then wiring the SATA cable to the optical bay area and use SATA power splitters on the SATA cables of the optical bay area so you can mount 4 SSDs in there. (I've done my best to explain this hope you understand ) Anyways I hope this is of help to a lot of people ! Cheers !