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7970 GV-R797OC-3GD crossfire power needed

mirkoj

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7970 GV-R797OC-3GD crossfire power needed
« on: September 21, 2012, 12:18:18 pm »
hey guys,
I'm waiting for my 2nd 7970 windforce card to arrive and in the meantime just figured out to check if anyone have good idea of PSU needed for these two?
Ofc it depends on the rest of configuration so in short:
i7 2600k OC at 4.4Ghz
OCZ H100 water cooling, 2 fans on radiator
3 fans inside case (corsair obsidian 800D)
16 gb ram
1 DVD standard crap don't even use it often,
2x OCZ 120gb SSD
2x WD 640gb hard drives
and so far 1 7970 waiting for another

Current PSU is Thermaltake tough power 875W so just wondering if that will give enough juice or maybe 1200W would be needed.
Any guides for power consumption under heavy load ofc appreciated :)
Thanks!

Dark Mantis

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    • Dark Mantis
Re: 7970 GV-R797OC-3GD crossfire power needed
« Reply #1 on: September 22, 2012, 07:52:47 am »
Hi

As long as your current power supply is not too old and working alright I don't see any reason to change it. There should be enough power to run the two graphics cards quite ok but try and make sure that they are on different busses if it has more than a single 12v bus.

Happy gaming!
Gigabyte X58A-UD7
i7 920
Dominators 1600 x6 12GB
6970 2GB
HX850
256GB SSD, Sam 1TB, WDB320GB
Blu-Ray
HAF 932

Gigabyte Z68X-UD5-B3
i7 3770K
Vengeance 1600 16GB
6950 2GB
HCP1200W
Revo Drive x2, 1.5TB WDB RAID0
16x DLRW
StrikeX S7
Full water cooling
3 x 27" Iiy