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Which PSU should I buy?

Last response: in Components
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October 11, 2013 1:12:56 PM

My current specs:
CPU: AMD FX 8350
RAM: Corsair Vengeance 16GB (2x8GB) 1600Mhz
GPU: Geforce GTX 650
MOBO: Gigabyte GA-990FXA-UD3

I was looking at the Corsair RM850 http://

I am planning to upgrade my GPU to either 2 770s in SLI or 2 Radeon R9 280x in CF.


So, which PSU should I get, and which 2 GPUs?

More about : psu buy

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October 11, 2013 1:36:01 PM

Radeon R9 280x in CF is better. 700 wat PSU is enough.
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October 11, 2013 1:38:37 PM

Random_G33K said:
Radeon R9 280x in CF is better. 700 wat PSU is enough.


So, would I be safe with those specs, 2 280x in CF, and a corsair RM750?
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a c 1167 ) Power supply
a c 540 U Graphics card
October 11, 2013 1:48:17 PM

If you're going to be overclocking your AMD FX 8350 you'd be better off with the RM850.
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October 11, 2013 2:08:50 PM

ko888 said:
If you're going to be overclocking your AMD FX 8350 you'd be better off with the RM850.


I dont think I will OC it. Its already 4.0 GHz Octa core, so I probably wont spend the extra cash OC'ing it.
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October 11, 2013 2:23:00 PM

TBH I would still go with a higher wattage PSU like Ko said. 2 x 770s will pull ~500w alone. Cutting it close.
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a c 1167 ) Power supply
a c 540 U Graphics card
October 11, 2013 3:16:32 PM

A Radeon R9 280X is a rebranded Radeon HD 7970 GHz Edition.

For two Radeon HD 7970 GHz Edition graphics cards in 2-way CrossFire mode AMD specifies that a minimum of an 850 Watt or greater system power supply should be used.

Sapphire Technology and H.I.S. both specifiy a 1000 Watt power supply for two Radeon R9 280X graphics cards in 2-way CrossFire mode.

Under power your rig at your own peril.
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October 11, 2013 3:29:21 PM

ko888 said:
A Radeon R9 280X is a rebranded Radeon HD 7970 GHz Edition.

For two Radeon HD 7970 GHz Edition graphics cards in 2-way CrossFire mode AMD specifies that a minimum of an 850 Watt or greater system power supply should be used.

Sapphire Technology and H.I.S. both specifiy a 1000 Watt power supply for two Radeon R9 280X graphics cards in 2-way CrossFire mode.

Under power your rig at your own peril.


But, on eXtreme power supply calculator, it says a minimum of around 600 Watts. And I put all my specs. the CPU, GPU, RAM, MOBO, HDD, SSD, and it says 600 watts. And the Corsair RM 750 has 750W and enough amps...
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