Is Seasonic S12II 520W enough to run 2x R9 270X in Crossfire?

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TheAviot

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Sep 22, 2014
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Hey,

right now I have this setup:

Intel Core i5-3350p
Sapphire Dual-X R9 270X 2GB
ASRock B75M R2.0
8GB 1600MHz Crucial RAM

Seasonic S12II 520W

Additional HW: 1x 7200RPM HDD, 1x SSD, 5x fan (2x140mm, 3x120mm), Bitfenix Recon.

I've decided to buy another 270X to the setup, my question is: will the PSU be sufficient enough to handle it?

Thanks.
 
Solution
capt_taco
Ignoring the wattage, that power supply doesn't even have enough 6-pin PCIe connectors to run more than one 270X, so no, it won't work.

Here's a handy tool to calculate estimated power consumption:

http://www.extreme.outervision.com/PSUEngine

Your build comes in at 496W, so 520W is definitely a bad idea. Maybe you could get away with 600W, but I'd go more like 650-700W to have the headroom to operate with confidence.
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capt_taco

capt_taco

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Aug 5, 2009
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Ignoring the wattage, that power supply doesn't even have enough 6-pin PCIe connectors to run more than one 270X, so no, it won't work.

Here's a handy tool to calculate estimated power consumption:

http://www.extreme.outervision.com/PSUEngine

Your build comes in at 496W, so 520W is definitely a bad idea. Maybe you could get away with 600W, but I'd go more like 650-700W to have the headroom to operate with confidence.
 
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Solution
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TheAviot

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Sep 22, 2014
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Alright, thanks. Will Corsair CX750 be enough? Or would you recommend something else?
 
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TheAviot

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Sep 22, 2014
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Thanks, one more question: what's the difference between B1 and B2, as I can only find B1 in my country (Slovakia).
 
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capt_taco

capt_taco

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^^^ I would second the EVGA 750W. Top of the line, has enough cables, and the price is right ($64.99 on Newegg right now after rebate).


The Corsair CX series are OK for budget machines without a lot of power usage; I've had decent luck with them there. I would not put one in a high-end gaming machine.

As you can see from the excellent report by this same site, all Corsair PSUs are not created equal; the CX series are their bottom-of-the-barrel line.

http://www.tomshardware.com/reviews/power-supply-psu-brands,3762-5.html
 
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bignastyid

bignastyid

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Jun 19, 2011
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Try to get one from tier 1 or 2(a or b) in this list.
http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html
 
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capt_taco

capt_taco

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Well, the answer is basically the same answer. Except that at 650W, you should have enough power, and that PSU is of at least decent enough quality that you're probably safe taking the chance.

Always better to start your own separate thread; you'll get a better answer. And there are so many threads here anyway that I wouldn't worry about cluttering it.

 
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RamboUnchained

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Mar 7, 2014
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Gotcha. Thanks
 
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