PSU for R9 290 crossfire

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FlazTv

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Mar 30, 2015
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I have a 750 watt power supply bronze I believe and I had it for a few years.
I tried to add a r9 290 and put them crossfire but any game I would turn on in 3 min the computer would turn off.
Now the with one R9 290 it turns off after an hour of playing the division.
But now it doesn't restart it just turns off.
I could still turn it on right away and play.
I think my psu is outdated so I'm thinking of getting the g2 supernova 850 watt psu 80+ gold for crossfire.
Also forgot to add my cpu has a stick cooler so I'm thinking of getting the noctua air cooler for $85 hopefully that would help also.


These are my specs
I7 4790k
Msi z97 pic mate
16gb ram , 2-4gb, 1-8gb
750 watt power supply
R9 290 (hopefully a second one with the new psu)

Do you think it shuts off because of the psu?
 
Solution
turkey3_scratch


I don't know what you mean by the 850W. You never even mentioned your actual power supply in the first place, which means you undermine the importance of a PSU. Labelled wattage is evil and means nothing. That's why I said above, a "quality 1000W unit that can create enough current to merit its rated wattage." Trying to keep my wording as accurate as possible.

For your specs, I recommend this unit, though I warn you that you may be playing a bit of the gamble:

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA 1000W 80+ Gold Certified Semi-Modular ATX Power Supply ($131.98 @ Amazon)...
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Rabmac

Rabmac

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Nov 29, 2015
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850W should be enough for that setup.

With regards to your PC shutting down, have you checked all the temperatures as that may be the cause and not your PSU as I reckon a good 750W PSU should run your setup but you may want to double check with one of the experts on here.
 
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turkey3_scratch

turkey3_scratch

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Jul 15, 2014
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Depending on the quality of the PSU I can very well see it shutting down, and his system could easily require more current than what merits the labelled 750W. Probably overcurrent protection is shutting his system off, or over power protection. I would recommend a quality 1000W unit that really can create sufficient current to merit its labelled wattage, and one that is quality all around.
 
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turkey3_scratch

turkey3_scratch

Expert
Ambassador
Jul 15, 2014
22,630
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60,960


I don't know what you mean by the 850W. You never even mentioned your actual power supply in the first place, which means you undermine the importance of a PSU. Labelled wattage is evil and means nothing. That's why I said above, a "quality 1000W unit that can create enough current to merit its rated wattage." Trying to keep my wording as accurate as possible.

For your specs, I recommend this unit, though I warn you that you may be playing a bit of the gamble:

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA 1000W 80+ Gold Certified Semi-Modular ATX Power Supply ($131.98 @ Amazon)
Total: $131.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-22 08:42 EDT-0400

The above unit has not been reviewed, but the 850W, 750W, and 650W EVGA GQ units have been reviewed. The 850W was fantastic, the 650W so-so, and the 750W poor quality. So this recommendation is based on the assumption that the 1000W unit quality is moreso like the 850W unit. I expect it to be high quality.
 
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Solution
toyftw

toyftw

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Jul 29, 2012
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Hi - The width & height of a 1000w PSU will be the same as your current 750, the only measurement that
will differ is the length, and it should fit in a mid tower. Once you decide on a model just check the length
to be sure.
 
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