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Direct X 11 5970 More FPS in CrossFire?

Last response: in Graphics & Displays
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December 2, 2010 11:59:35 AM

Hello to all, I was wondering bc I Im thinking of buying a second 5970, but I would like to know if the 2nd card will increase my fps in Direct X 11 tessellation. Sry if this question was already posted but I found no info on this so help plz because I cant find anything with benchmarks showing the results.
a b U Graphics card
December 2, 2010 12:02:44 PM

I think it's fairly safe to say 2 x 5970 = more power than 1 x 5970. Tessellation? I'd like to think so!
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a c 125 U Graphics card
December 2, 2010 12:07:34 PM

Yes adding a second HD5970 will increase performance in all applications that support Crossfire (Including programs/games that use DX11 features).

However as you may or may not know a HD5970 is essentially already Crossfired two HD5870 GPU's that have been underclocked, Adding a second HD5970 will effectively be quad crossfire which does not scale very well.
Three GPU's in Crossfire is a much more cost effective way to increase performance compared to four GPU's in Crossfire, So my recommendation would be to buy a HD5870 and Crossfire it with your HD5970, This will give you a significant boost in performance.
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December 2, 2010 12:19:41 PM

Rustyy117 said:
Yes adding a second HD5970 will increase performance in all applications that support Crossfire (Including programs/games that use DX11 features).

However as you may or may not know a HD5970 is essentially already Crossfired two HD5870 GPU's that have been underclocked, Adding a second HD5970 will effectively be quad crossfire which does not scale very well.
Three GPU's in Crossfire is a much more cost effective way to increase performance compared to four GPU's in Crossfire, So my recommendation would be to buy a HD5870 and Crossfire it with your HD5970, This will give you a significant boost in performance.


Thanks for the fast reply but I'm not a newb but close to it with this card and you speak of scaling with I dont rlly understand what takes place and also I knew it would make it a quad but I didnt know that you could add a 5870 and crossfire it thats pretty interesting any bench marks with that?
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a b U Graphics card
December 2, 2010 12:27:44 PM

Just a quick note on scaling, if you have card X giving you 100% performance and you add another card X and it gives you 140% performance, then that's pretty poor scaling. If, however, it goes to 180% or 190% performance then that's brilliant scaling.

With hard numbers, we're talking going from 30 FPS to 45 FPS as poor, but 30 FPS to 50 FPS as awesome!
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a c 125 U Graphics card
December 2, 2010 12:40:43 PM

Tuga777 said:
Thanks for the fast reply but I'm not a newb but close to it with this card and you speak of scaling with I dont rlly understand what takes place and also I knew it would make it a quad but I didnt know that you could add a 5870 and crossfire it thats pretty interesting any bench marks with that?


as plastichairball said, a single GPU will give pretty much 100% scalling/usage, 2 GPU's will usually give you great scalling so somewhere between 170-199% scaling or to put it another way 70 - 99% more performance than a single card. 3 Way SLI or Crossfire is still pretty good and would most likely give you similar scaling to 2 way SLI or Crossfire, 4 way SLI or Crossfire tends to be pretty poor giving little benefit over 3 way SLI pr Crossfire

Sorry I couldn't find any benchmarks of HD5970 + HD5870 Crossfired
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a b U Graphics card
December 2, 2010 1:01:00 PM

Basically, the second 5970 will be performing about less than 50% of what it should, then there's a factor about how much bottleneck you may get depending on how well your cpu is compared to 2x5970's.

When the title said CrossFire I actually thought the op was asking if the game, Cross Fire was using dx11...
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December 2, 2010 3:31:00 PM

I have a i7 930 stock with a v10 cooler and I haven't overclocked bc I don't know how but Ur saying I wouldn't be able to get better performance for direct x 11 games bc I like to max out everything
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