Anti-Aliasing Lowering GPU Usage?

[HungryHamster]

Hey everyone,

 

This isn't a major issue or anything, but I noticed that when I turn on Anti-Aliasing in The Witcher 3, my GPU usage on my primary card (I run SLI) goes down about 20% (from 90% to 70%). My frames subsequently drop from about 130-150 to 90-110. I'm just wondering why it would reduce GPU load? Seems like I would expect the opposite to happen. Maybe it's the type of AA that The Witcher 3 uses or something? I'm just curious more than anything. If you have any idea, feel free to let me know.

 

Thanks.

 

[ARikozuM]

I would recommend using Nvidia Control Panel for any changes to Witcher 3.

[ARikozuM]

8 minutes ago, wrathoftheturkey said:

Which CPU do you have? The AAing is probably stressing it too much and making it bottleneck your card

 

EDIT: nvm didn't realize AAing was done on the GPU

[App4that]

Witcher doesn't tend to max utilization in SLI. I get around 70-100+fps with two 980ti at 1440. And I notice the secondary card can be utilized more than the primary. All par for the course from my experience. 

[HungryHamster]

16 minutes ago, App4that said:

Witcher doesn't tend to max utilization in SLI. I get around 70-100+fps with two 980ti at 1440. And I notice the secondary card can be utilized more than the primary. All par for the course from my experience. 

Strange, The Witcher 3 is one of the only games that I really notice significant increased performance from SLI. I have two EVGA 1080 FTWs with a HB SLI bridge and at 1440p/max settings I usually get 90% utilization on both cards. Running one GTX 1080 I sometimes drop to 50fps but running SLI I never drop below 90fps. Wish more games offered that good of scaling for SLI users!  

[App4that]

Just now, HungryHamster said:

Strange, The Witcher 3 is one of the only games that I really notice significant increased performance from SLI. I have two EVGA 1080 FTWs with a HB SLI bridge and at 1440p/max settings I usually get 90% utilization of both cards. Running one GTX 1080 I sometimes drop to 50fps but running SLI I never drop below 90fps. Wish more games offered that good of scaling for SLI users!  

I get good scaling in just about everything. Witcher 3 and GTA V stand out as exceptional though. Witcher 3 was unplayable for me with a single 980ti. I've been spending my break playing it now that I have SLI.