Two of the "ground" connectors are for sense, not ground. It's used for the video card to determine whether a 6 or 8 pin cable is plugged in to adjust power levels. A 6 pin cable has 2 +12v, 2 GND, 1 sense, and 1 NC or not connected pin. An 8 pin connector adds a +12 to the NC of the 6 pin and then an additional ground and sense to the +2 portion. Also, more ground does not equal more power.
And yet many manufacturers have all 3 power lines connected on 6-pin connectors.
Even more interesting is that a 6-pin done to spec puts more strain on the lines than an 8-pin done to spec.
With 75W over 2 wires (on the 6-pin) that is 38W or 3.13A per line, while the 3 wires on 8-pin have to deliver 50W or 4.17A per line.
And if we extrapolate from there, putting the same 4.17A per wire over a 6-pin (because the plug is the same, just with less lines), then it should be able to give 100W
And just a hunch, but the 12-pin plug has pretty much the same connector yet again (but a bit smaller), but gives 8.33A (or 5.5A if we follow Molex' recommendation). So assuming the actual wiring and contact pins are the same spec, we would get 200W/300W (132W/198W)) over the old pins.
All a bit confusing, at least if we assume that identical wires and pins would be able to sustain identical loads.
Which brings me to this one
Why is the connector on the PSU side smaller than the EPS P8? That one is specified for 6A/line.
All in all it doesn't look like the 12VHPWR should get 8.33A/line when the other connectors are rated for 3.13A/4.17A/6.0A per line.
I’d recommend the Corsair AX1600i or AX1500i if you want the best PSU.
Who manufactures those? Does Corsair that themselves? Because most companies get the internals elsewhere and just put their sticker on.