I'm going to buy a 280x to go with my 7970. I currently have a 850w bronze PSU. I know thats heaps for 2 7970s but border lined for 2 280x's
Will 850w be enough?
Posted 10 December 2013 - 01:02 AM
I'm going to buy a 280x to go with my 7970. I currently have a 850w bronze PSU. I know thats heaps for 2 7970s but border lined for 2 280x's
Will 850w be enough?
Posted 10 December 2013 - 01:03 AM
Posted 10 December 2013 - 01:05 AM
They are identical cards they should be pretty much the same. That would be more than enough I think.
Case: Corsair 300R Windowed Edition, CPU: FX 8320 @ 4.0Ghz, Motherboard: Gigabyte GA-970A-DS3P, RAM: 8GB Corsair Vengeance LP, Graphics Card: XFX R9 280X, PSU: Corsair RM750,
Cooler: H80i, SSD: Kingston V300 120GB, HDD: 2TB Seagate Barracuda
Posted 10 December 2013 - 01:08 AM
That is plenty of power, I would highly suggest that you pick up a second 7970 though because the 280x is higher binned and often will overclock even better! Unfortunately unless you have an amazing 7970 the 280x will get bottlenecked by the 7970 (arrg bottleneck hate that word). Essentially that is what will happen. The crossfire setup will run at whatever the card with the lowest clock is running at.
Take everything I say with a grain of salt. I may very likely be wrong.
Everything changes and nothing can stop that.
Posted 10 December 2013 - 01:13 AM
A 280x is just a rebranded 7970. The psu is more than enough.
Posted 10 December 2013 - 01:17 AM
CPU: FX8350 @stock Cooler: Corsair h110 Motherboard: Ga-990fxa-ud5 Memory: Corsair Vengance 8Gigs 1866Mhz GPU: Gigabyte R9-280x OC PSU: Cooler Master Silent pro 850w SSD: Corsair Force GT 60Gb HDD: WD 500 Caviar blue x2 (raid0) & WD 2Tb Caviar green DVD-WR: LG 24x Sound: Integrated Case: Corsair Obsidian 550d Fan controler: NZXT Sentry Mix.
Posted 10 December 2013 - 04:23 AM
Each Hawaii XT GPU running at 1000-1050mhz (7970Ghz/280X) draws ~240W at full load, two would draw 480W.
Your system power consumption including the CPU, motherboard & storage likely hover around ~150W at full load.
A PSU with a minimum continuous power of 700W is required with 750W or over being recommended.
850W is more than enough and covers headroom for overclocking.
Posted 10 December 2013 - 04:24 AM
More than enough :-)
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