Two 1GB 6850s vs. One 2GB 6970

I plan to buy from iBuyPower. I've every part of the two builds the same, minus the GPU choices.
One has [2x] 6850 IceQ X Turbo cards (1GB)
Core Clock: 820MHz
Memory Clock: 4400Mhz

while the other is [1x] Radeon HD 6970 (2GB)
Core Clock: 880MHz
Memory Clock: 5500MHz

the price for both builds comes out to a $3 total difference.
So my question is, would there be a significant FPS difference in either build?
13 answers Last reply
More about 6850s 6970
  1. First it depends if you play a lot of games that utilize SLI (or crossfire, as the case is with ATI/AMD) at present time.

    I'd tell you to get one 6970 now, then crossfire it with another later on...

    Personally I find that the getting a better one now, upgrading with another in a few months with another when prices drop is a better route to take.
  2. core clock and memory clock arent exactly what you should be rating your GPUs on
  3. i would just get the 1x6970. You can also save money there by getting a cheaper motherboard with only 1 pcie 16x slot. Remember if your going for crossfire 6850's not to get a motherboard with a 16x/4x pcie slot setup, you will have problems. Get a 16x/16x or 8x/8x setup.
  4. the x16 and x4 setups dont have as bad of losses as you would think
  5. Depends on the card, if you put 2 6970 in crossfire then the loss is significant. If you put two 5770 the loss is not that big.

    I also recommend the 6970. A single card always means less problems and more stability plus less heat.
  6. FlintIronStagg said:
    the x16 and x4 setups dont have as bad of losses as you would think

    its not about the losses, its about it not working properly at all sometimes, and more likely to get microstutter as when cards are running different bandwidth slots, its harder for the frames to come out in sync.
  7. In performance the 2 x 6850 is much better as long as the rig can handle the extra heat and power. see http://www.anandtech.com/bench/Product/302?vs=292&i=188.191.194.200.203.206.208.210.213.216.219.228.229.230.231.232.233.234.235.238
  8. ionut19 said:
    Depends on the card, if you put 2 6970 in crossfire then the loss is significant. If you put two 5770 the loss is not that big.

    I also recommend the 6970. A single card always means less problems and more stability plus less heat.

    +1 ; ive always liked putting one high end card instead of 2 mid ranged cards because of scaling and driver issues, etc. when they work correctly its crazy good, but i like the dependability of one card
  9. I agree...go with the one 6970. I had a problem my first time building where not every game recognized SLI (nvidia obviously) and the game would only utilize one of the cards which was mid-range because I bought 2.

    +1 beebahboo...you can always wait for prices to drop and grab another 6970...
  10. Alright I'll go for the 6970 then. 1GB or 2 though?
    I may try dual monitors.
  11. For two monitors go for the 2Gb model. That helps with multiple monitor setups. What's the price difference?
  12. personally I'd get this in your price/performance bracket:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16814133370

    Ive always wanted to try one of these too, which is supposed to best a 580 by a little bit. But it has the large vram. somethign to consider:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16814130626
  13. I was wondering what the price difference is for a gtx570 too.
    PS: he is making a pre built system, so he has to chose from a few cards.
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