GTX 670 sli and txaa issue

abeyance

Junior Member
Apr 6, 2015
3
0
6
I have two 670s in sli, but cant understand why when I use the txaa as a antiliasing all I get is bad performance as if I were using a single card. All I notice is this: when I use a different antialiasing the two cards can get to 100% GPU usage when I use the txaa, can't get past 60%. The sli works well and it's not bottlenecked, since in all game fps doubled ( at least when I use fxaa, msaa or smaa). I have a fx8320 overclocked at 4.3Ghz, 8 gigs of ram (cl10-10-10-24) overclocked at 1866, corsair cx750m supply the entire build the power and a 990fx sabertooth by Asus. I was wondering... why this weird behaviour?
 

SirPauly

Diamond Member
Apr 28, 2009
5,187
1
0
The reason TXAA doesn't scale as well with Sli, from my understanding, is, it uses sample data from other frames to achieve its quality.
 

abeyance

Junior Member
Apr 6, 2015
3
0
6
So with any sli only the msaa and the other antialiasing filters work, right? I wasnt aware of that. I think ill sell my two GTX 670s for 970. The vram limits me in some games.
 
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