r9 290 power supply

[jijoslin]

I have a sea sonic 750 gold psu with two modular plugs with a 6+2 and 6 pin each. Total of dual 6+2 and dual 6 pin. I'm using an r9 290 and I'm not using the other cable. Is this optimal?

 

[BigBadBeef]

What you need to do is check out how much power does your card need on the 12v rail and see if your psu can provide that.

Oh, and when installing the card make sure you follow the instruction manual, it will tell you how many cables must you plug in and where!

 

[Dylzan]

That is a good PSU, it's fine.

 

[NiCoM]

not using which cable? Your message is a bit "blurry" if i can say so.

Though you should always have both the 6-pin and 8-pin connected in the gpu, not plugging both in would mean the gpu doesn't get enough power.
Your psu having two of each cable is just because it's capacity is big enough to fit two gpus of a med/high-end power range for a CF/SLI setup. Though i would at max get two R9 280X's, not two R9 290's for a 750w psu.

 

[ksham]

Yes. If you later decide to CrossFireX the R9 290, then the two extra PCIe power connectors will become useful. But it is fine if they are unused. Just leave them alone. Do not cut them.

 

[Suztera]

You don't need to use the second modular PCIE cable. The first PCIE cable is able to support your 8 pin and 6 pin alone.

 

[Scampi]

You only need to use one bundled PCI-Express cable, that has 1x 6+2 pin & 1x 6pin attached.

You do not need to use the other identical/same bundled cable & attach a 6+2 or 6 pin from that, the single cable, can handle the single R9 290 fine on it's own with no side effects of any sort.

i.e you only need to use ONE of these bundles:

http://www.pcstats.com/articleimages/200911/seasonicX750_cab3.jpg