Corsair CX750W - Whats the max watts per PCIe connector ?

[adaseb]

I got some older miners I want to overclock a little since miners are more profitable now then before. Just wondering what is the safest wattage per PCIe connector? I am using them on older KNC Jupiters.

I know that with an SP20, which uses 1200Watts you can pull 400Watts each and not have the connectors melt. But with some KNC Neptunes running 400Watts melts the connectors.

I know that 150Watts is save due to GPU standards so with efficiency about 175Watts from the wall is safe. What about 250Watts from the wall? 300 Watts ?

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[VirosaGITS]

I got some older miners I want to overclock a little since miners are more profitable now then before. Just wondering what is the safest wattage per PCIe connector? I am using them on older KNC Jupiters.

I know that with an SP20, which uses 1200Watts you can pull 400Watts each and not have the connectors melt. But with some KNC Neptunes running 400Watts melts the connectors.

I know that 150Watts is save due to GPU standards so with efficiency about 175Watts from the wall is safe. What about 250Watts from the wall? 300 Watts ?

300 watts at the wall means 260 watts or so with .8 efficiency. Thats should be okay. under 200watts is probably better because you want the wires to stay cold, but the limit is anywhere from 200watts to 290watts. Some can even do a bit more. (Or less if they are really crap)

But this is an answer you will find yourself, you simply plug it in and check if the connectors get hot. If they do, they're bad.

[QuintLeo]

I got some older miners I want to overclock a little since miners are more profitable now then before. Just wondering what is the safest wattage per PCIe connector? I am using them on older KNC Jupiters.

I know that with an SP20, which uses 1200Watts you can pull 400Watts each and not have the connectors melt. But with some KNC Neptunes running 400Watts melts the connectors.

I know that 150Watts is save due to GPU standards so with efficiency about 175Watts from the wall is safe. What about 250Watts from the wall? 300 Watts ?

 The SP20 has internal limits at 288 watts/PCI-E connector, which is the CONNECTOR max spec (the contacts are rated higher but only as a free-air max rating).
 That works out to a bit over 300 watts per connector at the wall with a Platinum or Gold PS.

 *4* connectors on an SP20, 1200 watts = 300 watts/connector NOT 400. Your math was wrong.


 The PCI-E spec says 75 watts for a 6-pin, 150watts for an 8-pin on the connectors, but that's very very conservative especially when the only thing the 8-pin connector adds is 2 more ground wires (IMO they should have added 1 each ground and +12, 5 grounds 3 +12 makes ZERO sense).


 "at the wall" watts depends quite a bit on the efficiency of your power supply.