With SYS-7047GR-TPRF there are 4 cables for PCIe power, each of it has one 8 pin and one 6 pin connector. How do I connect the power when using 4x K20, which needs 2x 6 pin power on each card?
You will need to use the cable: CBL-0424L which converts one 8pin to two 6+2pins.