Properly Power dual 8 pin GPU

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Omar97

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May 25, 2012
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Hi,

So I'm building a PC right now and I'm having issues with powering my GPU correctly. I have a Sapphire R9 390X and am confused how to connect it to the psu. I have a cable coming from the PSU that ends with two (6+2) pins, so I'm wondering whether this will be sufficient to power the gpu or should I use an additional cable, which is also identical to the one previous.

ps my psu is a CX750M

thanks.
 
Solution
S
I have the the CX750M (Cue the bleating from those who believe they're crap) powering two Sapphire R9 280x, which also require 2 x 8 pin connections. You can do the following:

Use the one PCI-E cable to connect to both 8 pin blocks on your GPU or use both PCI_E cables and connect one plug from each cable to each port on your GPU....it really doesn't matter as the PSU only has a single 12v rail, so all 12v power comes from that one rail regardless of how that power is supplied cable wise to your system.
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Omar97

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May 25, 2012
11
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10,510


the PCIe cables are fully modular, I'm just asking whether I should use two cables or one cable. Each of those cables end with two 6+2 pin connecters. Wouldn't using one cable go through a lot of heat with a 300 Watt gpu?
 
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Sinistercr0c

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Dec 16, 2012
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I have the the CX750M (Cue the bleating from those who believe they're crap) powering two Sapphire R9 280x, which also require 2 x 8 pin connections. You can do the following:

Use the one PCI-E cable to connect to both 8 pin blocks on your GPU or use both PCI_E cables and connect one plug from each cable to each port on your GPU....it really doesn't matter as the PSU only has a single 12v rail, so all 12v power comes from that one rail regardless of how that power is supplied cable wise to your system.
 
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