I am trying to modify a Delta DPS-400AB-17 server 1U power supply to support a desktop motherboard and graphics card. The power supply has an 8 pin 12V EPS connector attached to a 21A 12V (252W) rail. My plan is to turn this into a 4 Pin ATX connector + a 6 pin PCIe connector (my motherboard only has a 4 pin CPU plug).
This theoretically shouldn't be a problem as I am not splitting up any wires, each receptacle is getting its own wire from the power supply (except the sense wire - which my understanding is doesn't actually complete a circuit). However, this would mean the rail that this is connected to could be at 70-80% utilization, meanwhile the other rail (which only has a 24 pin motherboard and some unused SATA connectors) could be at only 10%. Is having this kind of differential between the rails a bad thing?