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HUGE gains with 6950 Xfire

post #1 of 11
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So I just plugged in my second Sapphire 9650 and am seeings 100-150% Improvement. Went from 25fps in metro2033 with everything as high as it goes to 65 avg. Didn't think that was possible? I'm not complaining though!
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post #2 of 11
WOW! Thats some awesome scaling.
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post #3 of 11
Op is DX11, tessellation & DOF enabled? Because those kind of scaling is impossible as the more GPU limited a game becomes, the more scaling you get. At high settings the maximum scaling I got in Metro 2033 is 70%.

However with very high, dx11, tessellation & dof enabled the scaling became 85%.
post #4 of 11
It is known that the current gen AMD cards are scaling at 90% or better in most games. Good for you OP!

However, you can't go over 100%...
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post #5 of 11
I dont think the 9650s come till 2014 at least. /troll

Lol, Thats good to hear, I plan to go SLI in the future though.
   
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post #6 of 11
Quote:
Originally Posted by thebassoe View Post
So I just plugged in my second Sapphire 9650 and am seeings 100-150% Improvement. Went from 25fps in metro2033 with everything as high as it goes to 65 avg. Didn't think that was possible? I'm not complaining though!
Hey, I thought that was not possible. Radeon HD 6950 take noticable performance hit if you put it on PCIe x8 slot.
Since your board chipset is 970. The PCIe slot should not be able to work at x16/x16.
Are you sure the game setting are similar?
Are you comparing the 1 card vs 2 cards at the same clock speed?
If yes, congratulation then!
Radeon HD 6000 series performance gain from single to dual card configuration most of the time is between 80-100%.

My Radeon HD 6990 did not manage to keep Metro 2033 above 60 FPS all the time. Although it manages to keep the frame rate around 60 FPS most of the time, sometimes it still drop below 50 FPS.
    
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post #7 of 11
Quote:
Originally Posted by Bima Sylirian View Post
Hey, I thought that was not possible. Radeon HD 6950 take noticable performance hit if you put it on PCIe x8 slot.
Since your board chipset is 970. The PCIe slot should not be able to work at x16/x16.
Are you sure the game setting are similar?
Are you comparing the 1 card vs 2 cards at the same clock speed?
If yes, congratulation then!
Radeon HD 6000 series performance gain from single to dual card configuration most of the time is between 80-100%.

My Radeon HD 6990 did not manage to keep Metro 2033 above 60 FPS all the time. Although it manages to keep the frame rate around 60 FPS most of the time, sometimes it still drop below 50 FPS.
A 6950 would *NOT* take a performance hit from using a PCIe 2.0 x8 slot. Tom's and a bunch of other sites have done tests on that very subject, and the only cards that were affected at all were the HD 6990 and GTX 590, both dual-GPU behemoths.

But yeah, you shouldn't be seeing over 100% scaling. A few performance reviews have shown ~103% scaling, but this is a fluke and doesn't happen often.
    
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post #8 of 11
I've tested this as well. I am on 8x and am getting same benches as single card with crossfire disabled. Please note that is with 6970 bios.

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post #9 of 11
I just bought a second Sapphire 6870 yesterday.
Edited by JLMS2010 - 10/31/11 at 6:20am
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post #10 of 11
Quote:
Originally Posted by JLMS2010 View Post
I just got my second Sapphire 6870 yesterday. What are you guys using to run benchmarks. I ran the passmark performance test and got better results with my single 6870 than I did in X-fire?? The only place I got better results in x-fire was in the 3D directx10 test. It was ~30FPS higher. I just got bought PCMark 7 & 3DMark11 last night but have not had time to run them.

Anybody?
Passmark is a joke. Use 3D mark.
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