GTX 570 or 6970?

Hey guys, I need a little help choosing what video card(s) to run on my system.

First of all, in your opinion, do you think I would be better off going with CrossFire/SLI. Or going for a powerful single card? So far, I'm leaning towards Crossfire/SLI a bit, because it seems I will almost always get better performance with that, unless of course the game does not support it or scale it well, but it seems most games do these days.

Here's what I had in mind:

GeForce GTX 570 (x2, SLI) TOTAL = $670

Radeon HD 6970 (x2, XF) TOTAL = $700

What are your opinions on this? Should I with the SLI or XF, or go for a single card?

I based a lot of my decision on these benchmarks:,2674.html

Build info:

Here is what I’ve come up with so far, some parts are likely to change.

Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) 4 x 256KB L2 Cache 8MB L3 Cache LGA 1155 95W Quad-Core Desktop Processor BX80623I72600K
ASRock P67 EXTREME4 (B3) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBRL
Western Digital Caviar Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Power Supply
CORSAIR Professional Series HX850 (CMPSU-850HX) 850W ATX12V 2.3 / EPS12V 2.91 80 PLUS SILVER Certified Modular Active PFC Power Supply
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  1. You have chosen good parts for your build.

    Based on my own experience with crossfire and SLI, I'd choose SLI over crossfire any day.

    The scaling of 2 570s in SLI are close to 2 580s with some titles. This is a great combo. That 850 power supply is sufficient to power these.
  2. I have seen GTX 570's for $290 after rebate on Newegg this past week, so be sure to check for bargains. Generally, for reference designs, the 570's will be cooler and quieter. For drivers and stability, I would give the nod to the 570's as well, particularly with the new "auto-update" feature for SLI profiles implemented in the latest Nvidia drivers.

    To gauge performance you want to compare the actual games you intend to play to see which setup performs better. Different games will have a preference for one or the other. Of course, if you play any PhysX games, only the GTX 570's will render PhysX effects.

    The scaling between the 570's in SLI and 6970's in Crossfire is similar and depends on the game (click for a larger image):

    Performance also depends on the game (negative values to the left of center favor the 570's in SLI).:
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