R9 290 Crossfire Power supply is corsair CX750M enough?

[TheAterix]

basically i am getting another r9 290 for christmas and need to know wether its worth selling this psu and getting another with higher wattage/better rating, ive read that the 2 pull about 541 watts therefore i should be pulling about 700 watts out of it when under full load...
here are my specs
8320 (currently on stock, will be overclocking asap)
Asrock extreme3 990fx (getting asus sabertooth at christmas)
corsair vengeance 8gb 1600mhz
about 5 LED fans
1x 1tb 7200rpm SATA 1x 500gb 7200rpm sata 1x 120gb ssd
Sapphire R9 290 reference
Corsair CX750M

If i need to upgrade my psu, what wattage do you recommend and im looking for absolute best bang for buck here, let me know if you have any questions or ideas

Thanks for looking

 

[Suztera]

You want a 1000W psu.
EVGA G2 1000W is a good choice.
You don't want to cheap out on the PSU with two R9 290 connected to it.
Corsair CX series aren't good PSU. They only Tier 3. I would not recommend it for a gaming system.

Anything from Tier 1 or 2 from this list is fine as long it is a 1000W PSU:
http://www.tomshardware.co.uk/answers/id-1804779/power-supply-unit-tier-list.html

 

[Chaingunchris]

That's much more than enough. the r9 290 only takes like 250 watts. You should be fine. unless you get a processor that takes 220 watts. bottom line is, you should be fine. cf is a different story but that not the case here. youll be fine

 

[TheAterix]

That's much more than enough. the r9 290 only takes like 250 watts. You should be fine. unless you get a processor that takes 220 watts. bottom line is, you should be fine. cf is a different story but that not the case here. youll be fine

I am getting crossfire, that was the question, i dunno if you meant CF is included...

 

[Chaingunchris]

That's much more than enough. the r9 290 only takes like 250 watts. You should be fine. unless you get a processor that takes 220 watts. bottom line is, you should be fine. cf is a different story but that not the case here. youll be fine

I am getting crossfire, that was the question, i dunno if you meant CF is included...

Well if your getting cf. id recommend a better psu. not a best one, a casual one will do like this one. http://www.newegg.com/Product/Product.aspx?Item=N82E16817438018&cm_re=evga_supernova-_-17-438-018-_-Product

 

[Cheddle]

my system:
i5-4690 w/ a/m cooler
msi z97m-g43
antech 750w high current gamer
msi r9 290 twin forzer OC
sapphire r9 290 reference
1 x ssd, 2 x hdd, 3 x case fans, every usb port in use, 1x4k screen, 2x1080p screens.

getting 18,800 gpu score in firemark - mixed results in games, crossfire works... sometimes... (no fault of the builds, simply AMD drivers / poor game support)

Based on my research a 750w PSU is fine, however overclocking beyond 1ghz~ on air cooling should be avoided - the r9 290 power draw significantly increases with clock/voltage - switching to water cooling seems to reduce overall draw by 30-50 watts per card.

its worth noting that the antech can provide 740watts over the 12v rails and can deliver up to 40amps per 12v rail (provided its less than 740watts total across both (i.e 30amps simultaneously)) and uses one rail per video card.

 

[Tradesman1]

To be safe would look for an 800-850 minimum. A basic rig the general acceptable is a good 550 and as mentioned they can pull 250 or so , in Xfire an 800 still allows for OCing CPU and the GPUs as well as getting some minor add ons

 

[TheAterix]

my system:
i5-4690 w/ a/m cooler
msi z97m-g43
antech 750w high current gamer
msi r9 290 twin forzer OC
sapphire r9 290 reference
1 x ssd, 2 x hdd, 3 x case fans, every usb port in use, 1x4k screen, 2x1080p screens.

getting 18,800 gpu score in firemark - mixed results in games, crossfire works... sometimes... (no fault of the builds, simply AMD drivers / poor game support)

Based on my research a 750w PSU is fine, however overclocking beyond 1ghz~ on air cooling should be avoided - the r9 290 power draw significantly increases with clock/voltage - switching to water cooling seems to reduce overall draw by 30-50 watts per card.

its worth noting that the antech can provide 740watts over the 12v rails and can deliver up to 40amps per 12v rail (provided its less than 740watts total across both (i.e 30amps simultaneously)) and uses one rail per video card.

Thank you for that, but i have the 8320 which draws more power than the 4690 unfortunately so i would need probably a 850 no doubt!
But thanks for the info anyways,

 

[TheAterix]

To be safe would look for an 800-850 minimum. A basic rig the general acceptable is a good 550 and as mentioned they can pull 250 or so , in Xfire an 800 still allows for OCing CPU and the GPUs as well as getting some minor add ons

Yeah, i was looking at the evga supernova G/P2 1000w just to be sure 😉 because i want to be able to overclock, alot... so that extra headroom may be useful if i was to upgrade my cpu in the future..

 

[Tradesman1]

Yes, 1000 is a bit of overkill, but you'll have it and if you further upgrade will already be ready for most anything 😉

 

[Dark Lord of Tech]

For 2 go to 1000w.

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA SuperNOVA 1000G2 1000W 80+ Gold Certified Fully-Modular ATX Power Supply ($138.99 @ NCIX US)
Total: $138.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-09-26 14:09 EDT-0400