How much wattage for dual R9 290

Linnaeus · Jul 1, 2014

I am thinking about Crossfiring two R9 290s for my build. What is the recommended wattage for this kind of configuration?

Andrew Buck · Jul 1, 2014

Linnaeus :

I would recommend maybe this: http://www.amazon.com/dp/B00608FKN8/?tag=pcpapi-20 because those will take 800 W alone overclocked. That leaves barely any room for CPU. I hope you have an Intel CPU. Otherwise, the AX1200i is good (AMD FX 9590 or 4960X overclocked to 4.5 GHz+)

6R1M01R3 · Jul 1, 2014

What PSU do you have atm? it peaks about 300 watts on heavy loads, so you'd need a 750w+ PSU for a stable Xfire

Linnaeus · Jul 1, 2014

Andrew Buck :

http://pcpartpicker.com/p/tD8wqs
PCPartPicker.com says that it only takes 250W each and a total of 500W with both. Is this horrendously inaccurate?

Eduello · Jul 1, 2014

1000W would be my recommendation. This is arguably the best 1000W PSU for the price: http://pcpartpicker.com/part/evga-power-supply-120g21000xr

Linnaeus · Jul 1, 2014

6R1M01R3 :

I am thinking about using this setup: http://pcpartpicker.com/p/tD8wqs

Andrew Buck · Jul 1, 2014

6R1M01R3 :

Not at all. 300 watts PER CARD is a little hard to do.

Look at that. 300 Watts at stock. Why get an R9 290 and don't overclock? Plus, this is 2 of them. That will probably end up being close to 750 or 800 Watts if overclocked, and that leaves little room for the CPU. This isn't even full load for the GPU, just gaming. Stress testing will drive it up more.

Andrew Buck · Jul 1, 2014

Linnaeus :

Andrew Buck :

http://pcpartpicker.com/p/tD8wqs
PCPartPicker.com says that it only takes 250W each and a total of 500W with both. Is this horrendously inaccurate?

That is ESTIMATED. The real-world power consumption is more.

Linnaeus · Jul 1, 2014

Andrew Buck :

Linnaeus :

That is ESTIMATED. The real-world power consumption is more.

Makes sense. OK, how about this. I'm planning to OC a i5-4670K to 4.7GHz. How much wattage would that take up? Also, is that as safe clock to go with? I'm getting a be quiet! Dark Rock Pro 3 for my heatsink.

Andrew Buck · Jul 1, 2014

Linnaeus :

Andrew Buck :

Makes sense. OK, how about this. I'm planning to OC a i5-4670K to 4.7GHz. How much wattage would that take up? Also, is that as safe clock to go with? I'm getting a be quiet! Dark Rock Pro 3 for my heatsink.

Depends what voltage that will take and the CPU you get. I am limited to 4.3 or else I have to go upwards of 1.4 V, when at 4.3 I am fine at 1.275 V. But if you are at 1.3 V and 4.7 GHz, it would take approximately 126 Watts. For a good PSU calculator, look here: http://extreme.outervision.com/psucalculatorlite.jsp

chris987 · Jul 1, 2014

here is the real world power consumption. Intel Core i7-3960X Extreme Edition overclocked to 4.60 GHz on all cores / 2xR9 290 ~ 600w (total system consuption) Radeon R9-290 Crossfire review however if you dont have reference cards and plan to o/c the number may increase so we are talking about a 850W at lest for headroom under any condition so i vote for the leadex platform (EVGA g2)

Andrew Buck · Jul 1, 2014

chris987 :

I would still get a 1000W PSU in case of major overclocking and upgrading.

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How much wattage for dual R9 290

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