1000 Watts Power Supply provides 4x 8 Pin (6+2) power cables. (On Xeon). The Quadro series GPU requires 6 pin and/or 8 pin power connectors, so a 1000 watts power supply doesn't need 6 to 8 pin conversion adapters. In the sections below, the connection for each variant of GPU is explained.

GPU RTX 6000 installation (8+6 pin)