750W for 2x R9 390

[Totalimus]

I have a EVGA SuperNova G2 750W power supply and I am considering buying a Sapphire Nitro R9 390.

But if I do plan on getting a second card in the future (highly doubt it, I'd probably sell the 390 and get a 1 powerful gpu instead but you can never know), would it run just fine? Would I be allowed to overclock the cards?

[DaKi_B]

You should be fine with 750W. However that depends on your CPU/Motherboard and RAM aswell. Going by your build (that you have in your signature) With a single 390 you would be drawing about 430W at full load, with two 390's in CS at full load you would be at around 700W. So in theory 750W is enough. That is without overclocking, if you were to overclock you would need to get a stronger PSU or you would be really pushing it and it wouldn't be very safe for your cards.

[Morgan MLGman]

For R9 390 Crossfire it is highly recommended you opt for a 850W Power Supply. A 750W should suffice, however you could be pushing it

[Coaxialgamer]

21 minutes ago, Totalimus said:

I have a EVGA SuperNova G2 750W power supply and I am considering buying a Sapphire Nitro R9 390.

But if I do plan on getting a second card in the future (highly doubt it, I'd probably sell the 390 and get a 1 powerful gpu instead but you can never know), would it run just fine? Would I be allowed to overclock the cards?

in theory it should work if you don't overclock , but it might be pushing it.

[IAcKI]

I'm running a fairly similar system and Mine is fine with an aggressive overclock on my 970. Not too sure about the power draw difference however between a 970 and a 390. I believe they're fairly similar.

[Totalimus]

3 minutes ago, IAcKI said:

I'm running a fairly similar system and Mine is fine with an aggressive overclock on my 970. Not too sure about the power draw difference however between a 970 and a 390. I believe they're fairly similar.

They might be head to head in performance but from far as I know, 970 does draw less power just like any nvidia competitor.

I would go for a 970 instead but as I saw, then ROTTR is already using more than 4GB of vram so I just want to be safe.

[TheRandomness]

9 minutes ago, IAcKI said:

I'm running a fairly similar system and Mine is fine with an aggressive overclock on my 970. Not too sure about the power draw difference however between a 970 and a 390. I believe they're fairly similar.

The power draw difference is like 20-40W at the max. 

5 minutes ago, Totalimus said:

They might be head to head in performance but from far as I know, 970 does draw less power just like any nvidia competitor.

I would go for a 970 instead but as I saw, then ROTTR is already using more than 4GB of vram so I just want to be safe.

 

[STRMfrmXMN]

3 hours ago, Totalimus said:

I have a EVGA SuperNova G2 750W power supply and I am considering buying a Sapphire Nitro R9 390.

But if I do plan on getting a second card in the future (highly doubt it, I'd probably sell the 390 and get a 1 powerful gpu instead but you can never know), would it run just fine? Would I be allowed to overclock the cards?

You're good.