The motherboard CPU power port has a 4-pin connector exposed by default, but there's a dust-cover over an adjacent 4 pins that would make it 8-pin. I've gone through my documentation for my CPU, motherboard, and PSU... but I do not see where it is specified whether I should be using a 4 pin plugin or an 8-pin.
Can someone help out with which I should be using? And where would this be documented in my manuals?
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I'd go ahead and plug in the 8 pin (removing the dust cover first of course). I think the 4 pin is used for older CPU's (P4's), and extreme low power ones.
If you have a 8-pins on your PSU use the 8-pins instead of the 4-pins...
If your PSU only has a 4-pins use the 4-pins.
I believe the 8 pin was originally designed for p4's (Prescott etc), now they just use it for high end quads to take some load off of the 24pin motherboard connector.