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Would an Xeon W3520 ( i7 920 ) @ 4.2GHz bottleneck two r9 280x in crossfire?

I'm planning to get a second r9 280x as they're really cheap used in my country. I will be getting a 2560x1440 monitor which is why i m considering getting a second 280x. I have the Xeon clocked at 4.2GHz on a p6x58d-e motherboard with 6 gigs of ram.

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Depends on the game, but usually no. It would take a single threaded game with heavy CPU demands, and I can't think of any off the top of my head.

 

edit: Planetside 2. I think that's single threaded and I know it's CPU intensive. That's all I've got, and it should still easily hit 60+ fps.

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Probably a bit, depending on the game

 

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Nothing to worry about. As long as you have it overclocked 4.0ghz+ you can even sli two 770+

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