Quote from: chup on December 01, 2017, 03:48:38 PM

Of course. I expect Your next move to be fixing another car on top of Your car so You can drive 10 persons.

Please at least attempt to contribute to the conversation.

Quote from: carlo_0000 on December 01, 2017, 03:08:54 PM

if you undervolt it should be ok but not too safe 2x8pin cable can do 360w can go bit higher but check if it not getting hot

what you could do is add a wire from a molex cable , it s what i do, i manually connect a wire from the molex +12V and plug it in on 1 of the 3 +12V, and put some tape so the wire cannot get out by accident

problem with vega even if you undervolt to 150w it has a lot of pics what use more than 150w

i tried 2x vega on a 750w psu when it average use less than 550w , time to time the psu was shuting down (so get up to 700w?)

i put 3x vega on a 850w (there are only 4x 8pin connector) i made 2 extra 8pin my self used bridge + all molex connectors better use to much wires than too less

Thanks for the real-world experience. I don't know if I'm down to start diy'ing my own wires, but I'll at least keep an eye on them. I did a little further combing and found an old post on tomshardware, which may or may not be true? Either way, it's interesting. I would love it if someone threw a mythbuster up on youtube for this one.

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Johnny & the group,

Have learned several interesting facts about the PCI-E plugs and power after researching it this past week, that is worth sharing

The PCI-E connecter has 6 pins. They are not all used for power. For the 6 pin connector, Pins 1 & 3 are 12V & each can carry 8 Amps. Pin 2 by spec is not connected, although some PSU manufacturers do add a 12V line there. Pins 4 & 6 are Com return lines. Pin5 is Com for sensing. Using 2 lines, you get 12V*8A*2= 192Watts, much over the required 75Watts. With an 8 pin PCI-E connector, 2 Com lines are added (4& Cool

not a 12V & Com. There, Pins 1,2,3 are 12V, Pin 4 is a Com for the 8 pin connector sensing, Pin 5,7,8 are Com return lines, & pin 6 is for the 6 pin connector sensing. Using that config, 12V*8Amp*3=288 Watts, much over the required 150Watts.

Since Mar 2005, the molex pins are required to be "HCS" rather than "Std", which each carry a max of 11Amps. So properly made, an 8 pin PCI-e can supply 12V*11Amps*3lines=396Watts of power for the graphic cards.

Ther aren't 4 12V pins on the 8 pin connector, only 3, and 2 leads are used for sensing the connector type.

The other limiting factor of course is the width of the PCB lines on the graphics card, each typically carrying 1-2 Amps. That would also determine how much power it could carry to the graphics electronics.
Also worth noting Scott Meuller in his latest 19th Ed of "Upgrading and Repairing PCs" has this information incorrectly listed.
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