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Negative SLI scaling with 8350.

post #1 of 15
Thread Starter 
I have two 770 in SLI on an 8350 @ 4.8ghz. I notice that with games (with the exception of bf4 single player) I actually get negative scaling with SLI enabled.

The first Crysis for example. With one card, and the level loaded up(I don't touch the mouse or anything). I get 48fps. And with SLI enabled, the same spot gives me 43fps. I switched back and forth between SLI and no SLI and I get the same result. Some games just doesn't scale at all with SLI.

Anyone have any ideas? I'm just assuming that the FX8350 just doesn't have the IPC required for SLI.

I have windows 7 with the fx patch if that helps haha
Edited by wardoc22 - 1/9/14 at 9:56pm
post #2 of 15
What mobo are you using? and what other games is this occuring? i think i could either be your mobo(doubt it, you probably know what you are doing with that) or it could be the 8350 just not able to push those cards in horribly threaded games. The 8350 is more than able to sli, as you seem to have noticed in BF4, but in older games that run on only one or two threads, ipc matters way too much.
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post #3 of 15
Thread Starter 
Quote:
Originally Posted by LordOfTots View Post

What mobo are you using? and what other games is this occuring? i think i could either be your mobo(doubt it, you probably know what you are doing with that) or it could be the 8350 just not able to push those cards in horribly threaded games. The 8350 is more than able to sli, as you seem to have noticed in BF4, but in older games that run on only one or two threads, ipc matters way too much.

I have the m5a99x EVO. It should definitely be able to handle the set up. I heard that fast ram helps piledriver A LOT.
post #4 of 15
Quote:
Originally Posted by wardoc22 View Post

I have the m5a99x EVO. It should definitely be able to handle the set up. I heard that fast ram helps piledriver A LOT.

Fast memory depends on the engine. I know frostbite 3 loves fast ram.

Anyway, this is most likely just horribly threaded games giving you this issue. I recommend disabling sli if playing such a game(like crysis of course) if running bulldozer or piledriver thumb.gif it sucks, but most game coders in the last decade have been lazy at optimization. hopefully new technology like mantle helps change this tongue.gif
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post #5 of 15
Thread Starter 
Quote:
Originally Posted by LordOfTots View Post

Fast memory depends on the engine. I know frostbite 3 loves fast ram.

Anyway, this is most likely just horribly threaded games giving you this issue. I recommend disabling sli if playing such a game(like crysis of course) if running bulldozer or piledriver thumb.gif it sucks, but most game coders in the last decade have been lazy at optimization. hopefully new technology like mantle helps change this tongue.gif

But in bf4/bf3 I see horrible scaling, although its not negative. Minimum fps in the games are in the low 40's.
post #6 of 15
Piledriver when compared to modern i5/i7's usually has lower minimum frame rates in games, due to lower ipc. And nvidia has never had amazing sli scaling, especially in "brokenfield 4" tongue.gif
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post #7 of 15
What speed are the pci-e ports running at?
My 8350 with cross fire 7970s has very close to 100% scaling in supported games and around 70% when forcing cf on non-supported games.
post #8 of 15
Thread Starter 
Quote:
Originally Posted by bmgjet View Post

What speed are the pci-e ports running at?
My 8350 with cross fire 7970s has very close to 100% scaling in supported games and around 70% when forcing cf on non-supported games.

x8 pcie 2.0 each
post #9 of 15
His pci layout is fine, it's his Piledriver not able to push those cards on horribly threaded games that's causing issues
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post #10 of 15
Resolution?gpu usage?vram usage?
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