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[Fudzilla] AMD Has Working Malta 7990 Cards. - Page 12

post #111 of 170
Quote:
Originally Posted by Rayleyne View Post

The secret? it's quite simple, Don't **** with the drivers and you typicly won't have a problem, Using two examples (both blizzard games) I'd use a third but i'm under NDA and it would count as advertising

World of warcraft login screen (Its the same engine just without the cpu bottlekneck of being ingame)
1 7970 450 fps
2 7970s 860 fps
3 7970s 1210 fps
4 7970s 1530 fps on average recorded via after burner


SC2 Login screen gives similar results


NDA game (which relies heavily on compute shows a difference between 1 7970 and 4 7970s of 15 fps(ultra 2560x1440) and 52 with 4.

I'd Get up out of bed and provide graphs and **** but its 11:14pm and i really cannot be bothered.

Wow doesn't even use both Gpu's on my 690?
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post #112 of 170
Quote:
Originally Posted by kfxsti View Post

i wouldnt. as i own a 7990. lol


I wouldn't trade my quadfire setup for all the titans in the world, Sorry but no, my 7970s have more compute in ray tracing and game development, Not to mention nvidia price premium lol
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post #113 of 170
Quote:
Originally Posted by Shiftstealth View Post

Wow doesn't even use both Gpu's on my 690?

Tried turning Sli on and Vysnc off( Make sure to disable the FPS limiter in the advanced options menu)


Then when ingame type /console maxfps 0 which removes the engiens 200 limit.
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post #114 of 170
Quote:
Originally Posted by Rayleyne View Post

Tried turning Sli on and Vysnc off( Make sure to disable the FPS limiter in the advanced options menu)


Then when ingame type /console maxfps 0 which removes the engiens 200 limit.


Yessir, only uses one gpu or somethings messed up, even so it doesn't clock properly.

GPU1 @ 915Mhz instead of boosting up to 1100Mhz.

GPU2 @ 324 Mhz " "
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post #115 of 170
Quote:
Originally Posted by Rayleyne View Post

Oh trust me, there is a reason, There is always a reason, but to put it simply, Anything less then a login screen without a hexcore will bottlekneck a quad gpu setup due to having to run the game code at the same time, Rather then just the engine code, I mean sure i could run tests with 1-4 cards with super sampling at 16x EQ But again that'd require me getting out of bed and i'd probably hit a Vram limit.




Ok, let's take your login screen scores.

2 7970's: 91% increase of frames (UNDER 100)

3 7970's : 40.6% (UNDER 60%)

4 7970's: 26.4 increase in frames (Window DRESSING)

Sell the fourth GPU and get yourself a 6 core CPU.
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post #116 of 170
Quote:
Originally Posted by Phil~ View Post

Ok, let's take your login screen scores.

2 7970's: 91% increase of frames (UNDER 100)

3 7970's : 40.6% (UNDER 60%)

4 7970's: 26.4 increase in frames (Window DRESSING)

Sell the fourth GPU and get yourself a 6 core CPU.

Well that math is terrible lets be honest.

He has 450 FPS with one card. Going from 3-4 nets him another 320 FPS. Your math is off sir. Adding 1 card to the other 3 cards won't net him another double FPS.


I believe i just heard a Swish like in basketball.
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post #117 of 170
Quote:
Originally Posted by Phil~ View Post

Ok, let's take your login screen scores.

2 7970's: 91% increase of frames (UNDER 100)

3 7970's : 40.6% (UNDER 60%)

4 7970's: 26.4 increase in frames (Window DRESSING)

Sell the fourth GPU and get yourself a 6 core CPU.


6 core isn't anywhere near as useful as a 4th 7970, Also the cheapest intel hexcore is 560 bucks + a mobo, a referance 7970 is 400+ 12 in shipping.


Edit: your math is also way off


1530 - 450 = 1080
Edited by Rayleyne - 3/8/13 at 7:42am
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post #118 of 170
Quote:
Originally Posted by Rayleyne View Post

6 core isn't anywhere near as useful as a 4th 7970, Also the cheapest intel hexcore is 560 bucks + a mobo, a referance 7970 is 400+ 12 in shipping.


Edit: your math is also way off


1530 - 450 = 1080

You are still ruining the math.

450 fps- 1 card
860 fps - 2 cards adding 410 fps or around 91% scaling
1210 fps - 3 cards or 350 fps or 78% scaling
1530 fps- 4 cards or 320 fps or 71% scaling
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post #119 of 170
Me, your right about the math, I was thinking on a relative curve (different thread). But anyway, it's well known that multi GPU setups (especially high end ones) do not scale particularly well.
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post #120 of 170
Quote:
Originally Posted by Phil~ View Post

Me, your right about the math, I was thinking on a relative curve (different thread). But anyway, it's well known that multi GPU setups (especially high end ones) do not scale particularly well.

The main reason being a cpu bottleneck, Or a PCIE bus/other communications bottleneck, the difference is i have x8 pcie 3.0 to each card, Which leaves it down to a CPU bottleneck.


Driving 8192 Stream processors isn't the easiest job, then there's just plain old bad/poor coding.
Edited by Rayleyne - 3/8/13 at 8:04am
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