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is GTX580 SLI that weak ?!?

post #1 of 18
Thread Starter 
I recently went back to my GTX580 SLI setup for my main rig, and gave my brother rig my R9 390.

my rig got I7 2600K with 2 GTX580's in SLI
my brother got I7 920 with R9 390, I tested the R9 with an I5 6600 the diffrence in HeavenBenchmark was from 1410 to 1395 so it doesnt bottlneck the card.


anyway both PCS are connected to a 1920/1080 monitors.
I am tring to run COD BO3 on my rig and it seems to just struggle soo much with it.

according to my score in heaven benchmark I shouldnt be so far behind the R9 390. the 390 get 1395 score while my setup get 1250.
how is it that the 390 run BO3 so well while my 580's does so bad ?!?!
Edited by ranerX3 - 6/5/16 at 10:40am
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post #2 of 18
R9 390 is a more powerful single gpu and even in SLI GTX580 is still limited by the 1.5GB vram on it.
you went a complete downgrade.
Did you remove old drivers before you went to nvidia and have you enabled SLI.
    
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post #3 of 18
Thread Starter 
Quote:
Originally Posted by Sp33d Junki3 View Post

R9 390 is a more powerful single gpu and even in SLI GTX580 is still limited by the 1.5GB vram on it.
you went a complete downgrade.

ya I know I downgraded my brother plays allot more so I gave him the better GPU


I just didnt imagine the diffrence was so great, a few years ago when I used to play allot on the 580's I got much better game view I mean the graphics was much better.
this game probebly just waste so much resurces or else I cant understand this.

I will check and see if my memorry is being maxed maybe thats it frown.gif
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post #4 of 18
sli is bad for games. u only benifit sli if u are benchmarker and yea 580 is weak.
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post #5 of 18
Quote:
Originally Posted by mfdoom7 View Post

sli is bad for games. u only benifit sli if u are benchmarker and yea 580 is weak.

As for the 580, i can not speak. But the rest of this is just bad information. There are games that are not optimized for SLI but most games released have a profile at release or shortly after.
   
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post #6 of 18
Used to have SLI 480's which are similar. Also tried SLI 580's on a work bench, they worked pretty similar but their VRAM really destroys performance in modern games.
     
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post #7 of 18
Pull up something like afterburner and watch your VRAM max out, that's probably what's happening to your performance.
     
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post #8 of 18
Quote:
Originally Posted by Ultisym View Post

As for the 580, i can not speak. But the rest of this is just bad information. There are games that are not optimized for SLI but most games released have a profile at release or shortly after.
trust me 1 strong card can out peform when it comes to 580 and R9 390
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post #9 of 18
Yeah, the 580's are quite old now so they don't do very well in newer games. I think sli 580's @ 1000MHz has close to the raw performance of an R9 380 but they'll run out of vram long before they could even come close if they are 1.5GB cards. The 3GB cards would still put up a decent fight though I think.
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post #10 of 18
290/390 > 580 sli

Fermi is quite long in the tooth,

if the 580s in question were 3gb models you woulnd't see such a dip but the standard 1.5 gb models will choke due to vram.

i would say a 390 is somewhere around 5-9% better than SLI 580 in place that scale well when Vram isn't an issue.
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