Hello I brought and EVGA 550 GS. Fitted it. A HDD that has been running for 5+ years and a brand new SSD were never recognized by the system, do not show up in the BIOS or windows. I played around swapping the power lines, wire, end plugs and the ECO mode switch and nothing ever worked. I contacted EVGA and they sent out a new PSU. Unsurprisingly, imho this demonstrated exactly the same behavior. Went through all the permutations again and nothing. Anyone have any idea why this could be? Seems really strange to me that a PSU just would not power these two components but will power and older Crucial SSD that my OS is running off. I also tried removing some non-essential components like the GFX card but that did nothing either.