How much power for crossfire R9 280x ?

[dimi08]

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.

 

[Dylzan]

What res do you play at? Crossfire doubles everything apart from memory and performance, sadly. (As far as I know)

 

[sheag123]

might want to save yourself some possible headache and get a corsair or seasonic psu. there are others that are good but if you stick with one of those its hard to go wrong.

 

[mickypheonix]

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]

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/

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

 

[Pondering]

Get the overpriced seasonic =)

 

[mickypheonix]

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

 

[maddogfargo]

As others above have mentioned, do NOT cheap out on the PSU. Raidmax PSUs are not good quality.

Also, capacitor quality and aging is an important factor.

Here is a very good PSU calculation tool that is free for *PERSONAL* use:

http://extreme.outervision.com/psucalculatorlite.jsp

Use that to plug in your system details and see what you need.

 

[dimi08]

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.

 

[dimi08]

I maybe gave wrong link it wont open it for me http://www.winwin.rs/racunari-i-komponente/racunarske-komponente/napajanja/napajanje-1000w-chieftec-aps-1000cb-1187563.html

 

[sheag123]

Micro Systems
Emmi <--- has an incredibly helpful PC Part Picker style configurator
Emmi http://www.emmi.rs/naslovna_stranica.1.html
Duocom http://www.duocom.rs/
Winwin (same stuff as emmi @ higher prices) http://www.winwin.rs/
Qbit Computers http://www.qbit.rs/


have you tried these sites?