Right. On the GPU side, all 8-pins are populated. On the PSU side, only 7 of the 8-pins are populated. That's normal. If you look at how the +2 pins on the PCIe 6+2 connector are wires, you'll see that they're just daisy chained from the 6-pin part. They're both grounds. On the PSU side, you have three +12V and four grounds.