750watt psu able to run dual r9 390s and an fx 8320?

[omgazombie2k]

I recently purchased a rosewill photon 750w 80+ gold modular psu and was just wondering if 750w would be enough to support two of these monster cards along with my processor

 

[JackNaylorPE]

It's bit short of what I would put in

http://www.guru3d.com/articles_pages/powercolor_radeon_r9_390_pcs_8gb_review,8.html

Here is Guru3D's power supply recommendation:

AMD R9 390 and 390X - On your average system the card requires you to have a 550~600 Watt power supply unit.
AMD R9 390 and 390X Crossfire - On your average system the cards require you to have a 800 Watt power supply unit as minimum.

If you are going to overclock GPU or processor, then we do recommend you purchase something with some more stamina

 

[runesmite14]

Extremely doubtful.

Any overclock would make it a definite "no" (Not safely, anyway).

With only 750 watts you're not leaving room for much else. Remember, everything draws power, HDDs, SSD's even if it's minimal.

I ran two 290x's off of a Seasonic 750w, for a week while I waited for a 1000w PSU, It was obvious once I got the new one how much more stable the two cards were.

It will run, but it's not a safe idea. You'd want a 1000w if you really want to run that setup safely. (edit: Assuming you want some headroom for the future or any overclocks)

 

[omgazombie2k]

Extremely doubtful.

Any overclock would make it a definite "no" (Not safely, anyway).

With only 750 watts you're not leaving room for much else. Remember, everything draws power, HDDs, SSD's even if it's minimal.

I ran two 290x's off of a Seasonic 750w, for a week while I waited for a 1000w PSU, It was obvious once I got the new one how much more stable the two cards were.

It will run, but it's not a safe idea. You'd want a 1000w if you really want to run that setup safely. (edit: Assuming you want some headroom for the future or any overclocks)

I'll probably just go for a single card now and swap out my psu and get a second card a few years down the road, thanks a bunch for the insight!

 

[Nathaniel_5]

Your 750w PSU would likely reach peak load at some point and shutdown, please get a 1000w PSU for a stable run.
To do more specific calculations
http://outervision.com/power-supply-calculator

 

[4745454b]

Keep in mind those 290-390X cards are rated at 300W EACH. So two in CF is supposed to use ~600W. You have a 125W CPU so your total system draw should be around 750-775W. No way I'd try it with a 750W. 1kW sounds like a good idea, or any 900+ QUALITY unit.