A question to all the ones using server PSU... How do you power your pci-e x1 to usb risers? Do you use some kind of PCI-e 6 pin to 2xSATA extender? So, a server PSU with x8 PCI-e 6 pin connectors is not for 4GPUs, it is for 3 GPU plus risers..

I'm thinking into buying a really cheap refurbished FSP 500W ATX psu for mobo+cpu+16x GPU, and a server PSU for every GPU with a riser, But I can't see how to power risers only with server PSU without wasting so many connectors. PCI-e 6 pin are made for 150W max, aren't them? So for 75W max from PCI-e connector, that should be a PCI-e 6pin to 2xSATA for 2 risers.