Need PSU for 290X lightning CF

[kev507]

Linus sold me on the 3440x1440 LG monitor, but my gpu wasn't enough to handle it in the latest games, so I'm giving myself an early Christmas present of 2 MSI Lightning 290X cards, but I need a new PSU, as my current one is only 650W. The lightning cards use two 8 pin and one 6 pin PCIe connector each, and I intend on putting a healthy overclock on them, but nothing exotic or unsafe. Also, nice looking cables on the new PSU are a major plus. 

System specs:
i7 4770K @ 4.5 GHz, 1.27v

2x MSI R9 290X Lightning

2x 8GB G. Skill 2400 MHz RAM
Asus Maximus VI Hero

NZXT Kraken X60
5x 140mm non-led fans

1x 2TB Seagate Barracuda HDD
1x 512GB Samsung 850 Pro SSD

Corsair AIR 540 Case
NZXT HUE rgb LED's

LG DVD-RW

[eelnico09]

http://www.amazon.com/Corsair-Series-80PLUS-Gold-Certified-Supply/dp/B00EB7UIXM/ref=sr_1_10?ie=UTF8&qid=1415333681&sr=8-10&keywords=psu

[Aniallation]

Linus sold me on the 3440x1440 LG monitor, but my gpu wasn't enough to handle it in the latest games, so I'm giving myself an early Christmas present of 2 MSI Lightning 290X cards, but I need a new PSU, as my current one is only 650W. The lightning cards use two 8 pin and one 6 pin PCIe connector each, and I intend on putting a healthy overclock on them, but nothing exotic or unsafe. Also, nice looking cables on the new PSU are a major plus. 

There's a sticky for this: http://linustechtips.com/main/topic/199255-how-many-watts-do-i-need-check-here/

 

The minimum I'd say for two 290X overclocked would be 850W, as a system two of them overclocked with overvolting can pull over 1000W.

[Aniallation]

http://www.amazon.com/Corsair-Series-80PLUS-Gold-Certified-Supply/dp/B00EB7UIXM/ref=sr_1_10?ie=UTF8&qid=1415333681&sr=8-10&keywords=psu

No. Just no.

 

I wouldn't trust an RM with Intel HD Graphics, never mind two 290X's.

[Guest Philosophy]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139042 AX760. 

[Clyne]

No. Just no.

 

I wouldn't trust an RM with Intel HD Graphics, never mind two 290X's.

Well you have that "pic" in your profile...

[eelnico09]

No. Just no.

Uhm, why? I guess it's not enough.

[kev507]

Yes, I've read the sticky, which calls for about 1000W on a system like this, but I was wondering about specific units, I've heard good things about Corsair in the past, but the only one I've used is the AX760, not the rm

[Aniallation]

Uhm, why? 

http://www.overclock.net/t/1455892/why-you-might-not-want-to-buy-a-corsair-rm-psu

 

They are overpriced PSUs with mid-grade internals and made by CWT. Decent at best, but no competition for the likes of the EVGA G2.

 

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139042 AX760. 

Cutting it a bit close for comfort.

 

Well you have that "pic" in your profile...

lol

[Guest Philosophy]

Cutting it a bit close for comfort.

CORSAIR AX series AX860  then. 

[Aniallation]

Yes, I've read the sticky, which calls for about 1000W on a system like this, but I was wondering about specific units, I've heard good things about Corsair in the past, but the only one I've used is the AX760, not the rm

1000W is if you're really pushing the cards to the limit, with custom BIOS flashed and cards overvolted. With a moderate 24/7 level overclock on CPU and both GPUs, 850W would provide adequate spare room for other components and efficiency. 

 

AX PSUs are good quality as they are made by Flextronics, but the RM are made by CWT, and are nothing to write home about. Either way though AX and RM are both expensive for what you get. For your setup I'd definitely recommend the EVGA 850 G2.

[kev507]

Also, I've seen that PSU's like the EVGA G2 come with some cables that are 6+2 and others that are 6+2 and 6 on the same cable to the PSU. Does it matter whether each port on the GPU gets it's own power cable, or is it okay to use the 6+2,6 single cable on these GPU's?

[Aniallation]

CORSAIR AX series AX860  then. 

What's with all the Corsair in this thread?

 

The EVGA 850G2 will get the job done just as well for quite a bit cheaper.

 

http://pcpartpicker.com/part/corsair-power-supply-ax860

http://pcpartpicker.com/part/evga-power-supply-220g20850xr

[Aniallation]

Also, I've seen that PSU's like the EVGA G2 come with some cables that are 6+2 and others that are 6+2 and 6 on the same cable to the PSU. Does it matter whether each port on the GPU gets it's own power cable, or is it okay to use the 6+2,6 single cable on these GPU's?

The EVGA 850G2 comes with 4 PCIe power cables, each with a 6+2 and a 6 pin. In your case with the 290X Lightning, I'd run two cables to each card. One for the 6 pin and first 8 pin, and the second for the second 8 pin.

 

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