enough watt to power a second gpu?

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vampyiere6

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Mar 7, 2013
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So as the title says would i be able to power a other gpu that would be a gigabyte r9-280x that i would xfire with my gigabyte radeon hd 7970.

Spec:
cpu: amd fx-8350
mobo: asus m5a99x evo
ram: kingston 16gb 1333 mhz 4x4 gb sticks
gpu: Gigabyte radeon HD 7970 oc 1000 mhz
storage: 120 gb ssd 60x2 ocz and 1tb normal hdd
cooler: antec kuhler 620
case: fractal design core 3000
psu: 730w thermaltake SP-730AH2NH
optical drive: LG bluray station
fan controller: Lamptron Fan Controller FC5 V2
and 8 fans total in my case including the cpu fan
and then alot of usb's like mouse+headeset+keyboard etc that draws power idk if that really matter.

So would my 730w psu be able to power up if i add a r9-280x?
 
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OptimusPavlos1

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Nov 24, 2013
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Gosh I am no quite sure because r9 and hd are meant to be the same but I don't know if they can crossfire in unison. I don't think you can mate they are different but if you got another 7970 you could crossfire easy with that psu.
 
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vampyiere6

Honorable
Mar 7, 2013
832
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11,160


on psu calculator i get 696W i would require with a 7970+r9-280x and my whole setup?

idk if it count much extra watt, so would the 730w psu i have be good enough? i think it should be.

And since you xfire the r9 serie with just the pcie slots do i still need a xfire bridge to crossfire a r9-280x and my 7970 or would it work just to slap it in there? i know if you have 2 of the r9 or so they xfire without the bridge but do you still need a xfire bridge with 7970+r9-280x not that its a problem since i have the bridge.

And my mobo is just 2.0 pcie slots so would that slow down the cards if you compare to a 3.0 slot? on newer mobos
 
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