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2x580 or 1x590 for surround?

post #1 of 7
Thread Starter 
I know that the 580's are faster, but I'm concerned about running 5700x1080 on only 1.5GB of VRAM per card.

From what I know of how SLI works, it uses Alternate Frame Rendering, switching between cards, so you only ever get to use the memory from one card at a time.

I really don't want to shell out for 2 of the 3GB 580's. Any thoughts on what the better option is?
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post #2 of 7
Honestly, the better option between those two is separate GTX 580's. Although 3Gb models are HIGHLY recommended for that high of a resolution.
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post #3 of 7
590 = 1.5 GB VRAM per GPU

580 = 1.5 GB VRAM per GPU

The 580's are faster and overclock better but cost more coin. There are 3 GB versions of the 580 but they cost more and are slightly slower than 1.5 GB cards.
post #4 of 7
6950 crossfire?
post #5 of 7
2x 590s are better in perofmance. Also suggestions about 3g versions are true, as they boost more in surround.
Msi lightning XE pops up to mind .
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post #6 of 7
Thread Starter 
Gotta love all the quick replies. Thanks guys. It looks like I've gotta put a few extra pennies in my GPU account. I'd love to go ATI, but I'm running Microsoft Flight Simulator X, and ATI is TERRIBLE for FSX.
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My System
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Core i 3570K @ 4.4GHZ Asus Z77-V Pro EVGA GTX 680 Superclocked 2x4GB G Skill Trident 2600MHz 
Hard DriveCoolingOSMonitor
120GB SSD SATAIII/240GB SSD SATAIII Corsair H100 with 4xScythe 1900RPM Fans Windows 7 x64 3x Viewsonic 22" LED 
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post #7 of 7
I think an excellent alternative is Palit GTX560 Ti 2GB.
It sells at US$260, after MIR.

This is not a whimpy card. When overclocked, it can close in on a stock GTX580.
Its dual-fan cooling solution also favours overclocking and cooling.
With its 2GB per GPU, it is a strong contender.

So, I recommend a pair.

Link:http://www.newegg.com/Product/Produc...-099-_-Product
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