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Sold my 6970 crossfire setup cos of terrible performance...warning... - Page 3

post #21 of 32
I'm pretty sure you stuterring problems have to do with your overclocking both cards.

When you have 2 6970 you dont need to overclock any thing. Makes no since really.

But you sold it, so it's moot now. Next Time, I would keep both cards at stock speed, only becaue the performance gain isnt worth the heat and noise.

BTW, I tested Crysis 2 with everything on Ultra and I averaged 45 FPS no vsync. BUt that's because I forgot to turn down Tesselation.

ATI still doesnt handle that well.

It vsync at 25 FPS, but thats because I got the Vsync bug, and There is a few tricks I had to figure out to get it stay at 35 FPS with 1 cards.
Edited by fapestar - 11/20/11 at 4:41pm
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post #22 of 32
I tested this on my gigabyte p67 ud3p when I had it, and I got the same results. IIRC, the reason why this happens is because the x16 lane is running off of the cpu, while the x4 lane is running off the chipset, meaning higher latency. But yes, x16,x4 crossfire is awful.
     
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post #23 of 32
Thread Starter 
@fape...

Dont you THINK i would have tested @ stock?

I tried like 5 different drivers.

I tried everything...

and once I sold it and used a single card I saw exacly why!

@behemoth....that makes sense
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post #24 of 32
Quote:
Originally Posted by porky View Post

@flip ,
yes I agree...x8x8 would probably have worked better.
it could be an issue with my board perhaps? seeing as your saying you have NO horrible stuttering?
please test something for me , run BF3 max with 4xmsaa...youll get about 50fps..........should still be fine...let me know if you get a horrible NOTICABLE stutter?

That stutter is microstutter, which is present on ALL multiGPU setups, ATI or Nvidia...
It is not a problem and there is no "fix" for it. It is simply a tradeoff for higher fps.

Some people like you and me find it VERY noticeable, whereas some people won't notice it at all. That's why some love CFX and others hate it.
post #25 of 32
Thread Starter 
I know all about microstutter...

I find this hard to believe that i was experiancing microstutter , cos if this is what it is ...its shocking.

anyways from my research microstutter appears with single gpu setups aswell but not asbad...its bassically the difference in time in ms it takes the PC to render a frame , and if there is a high difference between each frame you get a noticable ammount of stutter!
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post #26 of 32
Yeah I heard of 16x/4x crossfire increasing the perception of microstutter since there is more latency. If you have higher end cards, you want at least PCI 2.1 8x for both cards
post #27 of 32
Quote:
Originally Posted by porky View Post

Heres games I tested on crossfire :
Crysis 2
Heaven benchmark
Battlefield 3
Rage
World of tanks
Shogun 2
All exact same problem except rage dident even work with CF......
so what was the point of me keeping crossfire...and im sure its my 4x slot cos with a single card I get the same issue if its in that slot...

Crysis 2 runs bad with AMD card period, BF3 runs perfect for me, Rage only uses 1 card last time i check but even 1 card is more then enough, No idea about the other game. Unless someone is using high resolution screen like me 2560x1440 i would stay away from CF or SLI because if you are a gamer its not really worth it to set it up for each game but once you do the fps increase is massive.
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post #28 of 32
Your sig rig board is the P8P67 pro or did this happen with a different board? I have that board and I run fine with them at 8x/8x. Second slot is not 4x only unless you have some other version I don't know about.

I was hitting 100 fps in BFBC2 with eyefinity, I don't call that bad performance lol.
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post #29 of 32
wait what game? this is completely out of context
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post #30 of 32
Thread Starter 
sorry its the P67 normal not the pro I guess...this was with every 3D application..how many times must i repeat myself
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