Quote from: QuintLeo on November 02, 2017, 11:31:43 AM

Found the actual specs tonight.

Molex connectors (technically AMP Mate-N-Lock but they got commonly MIScalled Molex a long time back) are rated for 13 amps per pin - one pin on 12V (and 2 ground pins, though one is really intended for use on the 5V connection) gives 156 watts power capacity, PLENTY to power the PCI-E bus on a riser with lots of capacity to spare - the limit is usually going to be the WIRING.

SATA power connectors have 3 12VDC pins (and 5 ground pins) but each pin is only rated 1.5 amps, so 4.5 TOTAL amps at 12vdc = 54 watts WHICH IS NOT ENOUGH TO HANDLE THE 75 WATT RATED POWER DRAW FOR THE PCI-E BUS SAFELY.
Forget the wiring, the connector ITSELF is not rated for the power load needed for safe operation.

PCI-E 6-pin connectors are rated 75 watts by the PCI-E spec but they're actually good for 8 amps per pin and at least 2 are connected to 12VDC (the third is sometimes used for a "sense" line), so even 2 pins 8 amps each = 16 amps at 12VDC = 192 watts.
PCI-E rates the power connectors VERY VERY conservatively - but again, be cautious about the wiring which often is NOT that far overrated.

So how do you connect your cards?
According to this data one should use 2x SATA to Molex|6PIN adapters for connecting SATA to risers and Molex can be connected directly, right?