From what I'm aware of, the most recent version of the HX750 (2018?) has 2x 8 pin EPS connectors, but the older (2013?) version only has 1x 8 pin EPS connector. It's rare to have a motherboard which requires more than one 1x 8 pin EPS connector, though with a 10900k I suppose it's more likely you'll be using a high-end motherboard.sorry my typo Tetras it should be 10900K not a 10700K, and it was not a case of the power it was that the HX750 does not have 8 pin EPS cables, sorry for any confusion, so I still say the dealer whom I have spent a lot of money with over a 35 year period was wrong.