Dual EVGA GTX460's vs Single GTX580 w/3GB Memory

I am looking for some feedback because I am thinking about upgrading my current video cards. I am wondering if I will get better performance with a single gtx 580 vs the dual gtx 460 superclocked EGA cards I am running in SLI now? I am using my second card for PhysX. The EVGA GTX460's in SLI seem to be working good but I am wondering if it is worth it to upgrade? I might be upgrading the memory to 32gb of 1866 or 2000 memory. The cards I seem to like the most at this time is EVGA.

My Current Configuration:
Cooler Master HAF 932 Full Tower
Gigabyte GA-990FXA-UD5 AM3+ Motherboard
AMD FX-8120 8 Core CPU
Corsair 1600 DDR3 16GB Memory
Two Corsair Force Series GT CSSD-F60GBGT-BK 2.5" 60GB SATA III SSD's
Seagate 2TB 7200rpm 64mb Cache SATA III Hard Drive
Cooler Master 1200 Watt PSU
Noctua NH-D14 120mm & 140mm SSO CPU Cooler
Dual EVGA 01G-P3-1371-RX GeForce GTX 460 (Fermi) 1GB 256-bit GDDR5 Video Cards (Max Resolution 2560 x 1600)
Samsung SyncMaster P2770FH 27" 1080p Monitor (Max Resolution ?, Recommended Resolution 1920 x 1080)
Windows 7 Pro 64bit

Cards I am considering:
EVGA 03G-P3-1595-AR GeForce GTX 580 (Fermi) Classified ULTRA 3072MB 384-bit GDDR5 Video Card

XFX Double D FX-797A-TDBC Radeon HD 7970 Black Edition 3GB 384-bit GDDR5 - How ever my motherboard is only pci 2.0 and I still have heard some minor issues with certain games running a Radeon set up.
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More about dual evga gtx460 single gtx580 memory
  1. I have no idea why you're going from 16gb to 32gb memory... even 16gb is a waste for gaming. 8gb is all you need atm, and that could even be argued down to 3gb or 4gb.

    single card is always better than sli if the performance is around the same. Don't buy anything right now, wait for kepler to drop in april I think, then buy one of those single card.

    You might also want to research how your cpu compares to ivy bridge when that comes out. Should be a good performance bump.
  2. Dual GTX 460 is faster than a single GTX 580. If you want more performance, wait for Kepler, the GTX 660 is supposed to match the GTX 580 but cost $250 less and use a lot less power.

    Your CPU should be upgraded first because it probably already bottlenecks your current graphics anyway. If you want a very high end system then you NEED to go Intel because NOTHING from AMD can handle it. If you wait for Kepler, then you might as well pick up an LGA 1155 IB CPU and motherboard too.

    There are no problems with games on a Radeon setup escept for the games that Nvidia paid the developers to not support the Radeons as well, but the Radeons do run them all and the 7970 is so fast that even in such games, it wins against the GTX 580. However, if you overclock your graphics then you should get the 7950 and over clock it to 1.2/1.3GHz or so, it is nearly identical to the 7970 at the same clock rates so the 7970 is only for someone willing to pay $100 to not need to overclock the card as much.

    The Radeon 7970, like ALL other PCIe 3.0 devices, still supports PCIe 2.0, 1.1, and 1.0. Remember, PCIe is backwards compatible. The current problems with Radeon 7000 are mainly CF support, the Radeon 7000 cards don't have it yet. However, the 7970 can be overclocked past the much more expensive Radeon 6990/GTX 590, so it doesn't really need CF support too badly anyway.

    Don't go for more than 16GB in a purely gaming/general purpose system. Don't go below 8GB for gaming, some games need the extra memory. However, none need more than 8GB right now, so going to 12 or 16GB is only if you also want to do some multi-tasking such as having other programs running at the same time.

    For 1080p, you won't get any better of an experience than what you have now. If you want better graphics, then you also need to get a better monitor, specifically a 2560x1440 or 2560x1600 monitor.
  3. Scan are selling the EVGA 580 for £137.99 pick 2 of these up and you'll have a beast of a machince considering the 580 is the 5th most powerful single nvidia card currenty made
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