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January 15, 2018, 05:20:10 AM |
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If I remember correctly the 6 pin is rated for 75w, and the 8 pin is rated for 150w - plus the card can also get 75w from the PCIe slot itself (or riser), so keep that in mind. You've probably noticed that in many cases ATX PSU's don't even have the full 8 wires, just 6 and two ground jumpers to the last two pins on the 8-pin - this is because it's the gauge of the wire that're more critical to getting the extra 75w, not the extra pins of the connector (but they use them to indicate that the cable is higher gauge).
Generally speaking, you want to be careful about splitting PCIe connectors - while mining cables like the ones in the picture you sent are fine, but I like higher gauge (AWG) - 18AWG is ok, but 16AWG is ideal (although bother are higher than the ones you'll find on ATX power supplies). There is also the max amount of power that the actual 6 or 8 pin PCIe molex connector can support (I may be off here, but I seem to recall it's around 225w). The better plan is to go with a breakout that has more plugs on it - like I use Optimizer's boards with the DPS-2000BB, and it has 16 PCIe plugs on it.
Now that being said, splitting a miner-grade 16AWG 6-pin cable into two 6-pin's is going to be fine - consider a 16AWG cable might as well be an 8-pin - but I wouldn't split it into 2 8-pins or anything other than two 6-pins, or you're asking for trouble.
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