How much power for crossfire R9 280x ?

dimi08

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Is this 850W PSU good for 280x crossfire http://raidmax.com/psu/rx_850ae.html ? or should i go with more powerful PSU 1000W or 1200W?

I will not buy both of 280x in same time i just want to have PSU that can support them in future(probably buying second one next year).If i go with crossfire does that mean that shading units, texture mapping units, compute units, memory, clock speed and pixel rate will be doubled ? I play bf4,bf3 and i will buy hardline,i just hope that single 280x can give me at least 60fps in game.

FX-9370
Asus M5A99FX PRO R2.0
Corsair Cooling Hydro Series H55
16GB RAM
other part such as HDD,sound card,optical drive and others will be taken from old pc,they dont need much power.
 
Hi dimi08
You will requie a minimum 900 watts for crossfire R9 280x
i would go with 1000w for some headroom
get a quality PSU from seasonic/xfx or any psu from corsairs HX ,TX or Ax range or cloolermasters v eries or evga supernova series
they all use high grade japanese capacitors
this will give you an idea of crossfire performance in games
http://www.techoftomorrow.com/2013/pc/amd-r9-280x-crossfire-results-benchmarks/
http://www.techoftomorrow.com/2013/pc/amd-r9-280x-crossfire-results-benchmarks/
 

dimi08

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Seasonic is not option because where i live 1000W seasonic costs about 350-400$ and theres no xfx, only 1000W are 1 Chieftec,2 Raidmax and 1 overpriced seasonic

 
agreed , get the seasonic it is the only psu on your list with high grade japanese capacitors
Poor quality capacitors break down quickly over time resulting in spiky voltage being delivered to the motherboard. This results in motherboard breakdown or poor cpu performance.
If you wish to risk this with your components that decision is entirely up to you , we can only advise

 

dimi08

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I really dont know,that seasonic is nearly half price of my all components,all components are ok pricewise but PSU will set me back,its too much. http://winwin.rs/racunari-i-komponente/racunarske-komponente/napajanja/napajanje-1000W-chieftec-aps-1000cb-1187563.html. they say it has UVP,OVP,SCP,OPP,OCP,OTP,AFC does that mean anything good.