R9 290's crossfire...

[Enflics]

Hey guys I'm planing on getting one R9 290 and then in about 4 months time another one, so I was wondering I can't seem to find what PSU would be enough for those two bad boys. Some people say they run it with 600W + bronze some run it with 750w power supply's I'm lost at this point. My end goal is to run maxed out apart form AA and similar stuff on 3440x1440 resolution. I don't mind turning some settings down so if one R9 290 is enough just tell me Those prices on R9 290 are to much for me to walk away from.

 

Thank you for your contribution

[Sonefiler]

You need more than 750W, I tried with an i5 and two R9 290s and it won't work.

 

Try an 850 minimum, preferably a 1kW PSU like the HX1000i.

[JustCallMeVlad]

You'll blow up a 600W with 290 Crossfire 

[Archangel1994]

@Enflics

 

If you want to OC get a quality 1000W PSU since R9 290 crossfire OC'd can draw 900W (entire system)

[decripple]

850W or more. My single Asus R9 290 DCII seems to pull about 275-300 watts depending on what programs (games mostly) I am using. Based on this I would say you need ~600W just for the graphics cards plus at least ~150W for the rest of the system so I would say 850W minimum just like Sonefiler said but really a 1000W unit would be ideal because it should offer better efficiency by not being so highly loaded compared to an 850W unit

[ANewFace]

1000W PSU for 2 cards. Ha, not to be an Nvidia fanboy, but I can run 4 GTX 980s off 1000W

[ELSknutson]

I hav ran 2 R9 290x's with a 750W but I knew it was vary tight on wattage so I would get a 800W+ 

[Briggsy]

Hey guys I'm planing on getting one R9 290 and then in about 4 months time another one, so I was wondering I can't seem to find what PSU would be enough for those two bad boys. Some people say they run it with 600W + bronze some run it with 750w power supply's I'm lost at this point. My end goal is to run maxed out apart form AA and similar stuff on 3440x1440 resolution. I don't mind turning some settings down so if one R9 290 is enough just tell me Those prices on R9 290 are to much for me to walk away from.

 

Thank you for your contribution

 

I have a my computer plugged into a watt meter, and a 850 bronze psu. I would say 850 is optimal because a 50-60% load is where the best efficiency can be had with any PSU.

 

I have:

2x290's in crossfire @ 1100 core/1300 mem.

3570k @ 4.5 Ghz 

8x120mm fans

1x200mm fan

2x90mm fans

3x H50 AIO

4x 7200rpm HDD

1x SDD (can discount that as it uses no power)

1x sound card

 

and the most I can get my system to pull while gaming is 700watts with the cpu and both GPU's getting hammered. thats about 600 watts from the PSU itself after adjusting for efficiency. usually its quite a bit lower under load, hitting the 50-60% psu load sweet spot while playing more demanding games, so 850w is what I would recommend.

[Enflics]

Thanks guys, 850W it is. I was also wondering are there any alternatives, to this? Different GPUs that you would recommend? @Briggsy @ELSknutson @decripple @Archangel1994 

[Archangel1994]

Thanks guys, 850W it is. I was also wondering are there any alternatives, to this? Different GPUs that you would recommend?

For 850W PSU's:

 

EVGA G2 850W

AX860i

HX850i

 

For 1000W PSU's:

 

EVGA G2 (Or P2) 1000W

HX1000i

 

I recommend the 1000W for overclocking like a bawss. As for the GPU's you could go R9 290x MSI lightnings or Gigabyte windforce

[Enflics]

For 850W PSU's:

 

EVGA G2 850W

AX860i

HX850i

 

For 1000W PSU's:

 

EVGA G2 (Or P2) 1000W

HX1000i

 

I recommend the 1000W for overclocking like a bawss. As for the GPU's you could go R9 290x MSI lightnings or Gigabyte windforce

Thanks!

[Smokey77]

I'm running two R9 290X's with a NZXT Hale90 1000w. Nothing gets too hot or makes a worrying noise. So maybe got for a HALE90, they are pretty cheap. Good Luck dude.

[WaitForMeImOnDialUp]

i run dual 280x's and a overclocked fx 8350 on a 750w lol,but for for dual 290's i'd say a 1000w really.

[Guest]

At the very LEAST 850 watt.

 

One 290 takes 300 watt at load.

 

a CPU takes 100

 

That is already 700.

[xAcid9]

850w is plenty for an overclocked 2x 290x imo. 

You can run 3x overclocked 290x with 1000w PSU. A good one that is. 

 

Tomshardware's ran 2x R9-295x2 with a 1000w PSU. 

http://www.tomshardware.com/reviews/amd-r9-295x2-1000w-psu,3907.html