Each 6-pin PCIe supplemental power cable from the power supply has a convention of providing 75 watts max also.ħ5 x 3 = 225, so you'll be fine if you plug in the card to the correct slot, and plug two 6 pin PCIe supplemental power cables into the card. The convention for the PCIe x16 (16 electrical) video slots is 75 watts max thru that.

I would not recommend this one, unless I am incorrect regarding its wiring:ĮDIT: Here is a source that has excellent info related to this issue: When I look at the 8-pin plug end's wiring I don't see a ground wire or ground jumper coming to pin 8. The first and third pins of a 6 pin feed officially are 12v DC (some references have each of the first 3 pins being 12vDC) and thereafter the rest are supposed to be either a 'sense' or a ground connection. I, personally, would get an adapter.ĮDIT: Here is a pic of both ends of what is supposed to be a PCIe 6 pin to PCIe 8 pin supplemental power adapter. I do not know if you are required to use a proper 6 to 8 converter or could get away with plugging the 6 pin one straight into the proper positions on the 8 pin socket of your video card directly, as the hyperlink article implies.

In contrast, the Z820's lower rated power supply has only 2 PCIe supplemental (auxiliary) power cords fed by it. Yours does, and from checking the manual it looks like your higher rated power supply has 3 of these auxiliary PCIe power cords (G1, G2, and G3 will be printed on the side of your 3 plug ends). It is best to not do this if you have a power supply with official ones built in. There are also PCIe supplemental power adapters that let you convert from multiple 4-wire 'molex' power plugs to aggregate into a single PCIe 6 or 8 pin type connector. There are power, ground, and 'sense' wires to all be correctly wired for the adapter. If you look at the hyperlink at the top of this post you'll see the wiring of 6 pin versus 8 pin wiring, and for your project you'll probably want to follow nVidia's guidance for best results. Attached is another pic of the type nVidia is telling you to get. That looks like an 8-pin to two 6-pin adapter. I'm sure the one you show, also, is not what you want. You can see that it has 4 yellow wires (generally the power wires) and would not have the proper wiring sequence of a PCIe supplemental power 6 to 8 pin converter: you do not want that, for sure, and it's plastic connectors have different shapes. It also goes on to other topics with similar excellent info:įirst, it is important to know that there is another '6 to 8 pin' interface which is a power supply- to-motherboard device. Edit: Here is that link, related to this issue.

Nvidia fx 3500 quadro power supply