Low GPU Usage in SlI with GTA V

redflamingolingo · Apr 19, 2015

Hey Everyone,
I REALLY hope that someone can help with an issue I've been having with GTA V.

I have a pair of GTX Titan X cards and am running the game in 4K with most settings maxed. MSAA is off, though.

With one card, I hit 40 fps + consistently, and the framerate is consistently smooth through any FPS fluctuations.

As soon as I enable SLI, the framerate jumps anywhere from the 20s to 60 fps. The game constantly stutters, and GPU usage on each card fluctuates constantly though stays around only 50% on each card.

I CANNOT get the cards to be utilized fully. The game becomes a stuttering mess, especially while driving in the city. Even walking around causes the game to occasionally jerk into weird fps.

My Specs:

i7 4771 3.5 ghz
24 GB RAM (all speed and timing matches)
2 GTX Titan X cards
PSU Corsair 750 watt

The CPU is not bottlenecking the cards. Usage never jumps above 50%, and both cards never get too hot, either, as I keep the fans on high.

I've tried everything. No overclocking on the cards. Overclocking the cards. Messing with Inspector settings. Reinstalling the drivers after a clean uninstall of drivers.

I get 100% GPU performance in SLI with Dragon Age and other demanding games, so it isn't a faulty card issue.

Does anyone have a similar problem and can offer advice?!

Thank you!,
Paul

Vitric9 · Apr 19, 2015

Sadly SLI just does not scale as high as we would like, and Believe it or Not this PC port of GTA V is decent and can really hog the CPU time , from what i gather it may have scaled well across a i7 5960x. Plus this is the first driver from Nvidia for this release , expect more in a short period . I would be surprised if you got the 2 titan X cards at 60% for the most part. Say in a 10 min run of a specific benchmark. SLI will be better with the upcoming drivers as they always are. mostly.

EDIT Note : This is the latest WHQL Driver t from nvidia's site Version 350.12
link if you don't have it, also Unistalling and reinstalling drivers will make the API thicker than it has to be , so follow your strict regiment for the un-install .
http://www.geforce.com/drivers/results/83819

redflamingolingo · Apr 19, 2015

I hear you. I'm just really, really shocked considering a lot of people are claiming to have locked 60 fps performance with SLI enabled. Perhaps the random stutter and slowdown doesn't bother them, then? Does everyone have this issue?

I run games in SLI all the time, and really haven't seen this kind of crazy fluctuation in a profile before. Sometimes it hits the high 80%. Sometimes it's in the 40% range.

All hail the single GPU until this is fixed, I guess. Performance is really smooth and quite exceptional with a single Titan X in 4K. I just expected that a second card would lock the framerate at 60fps considering a single card gets me in the 40-50ish range at a constant, with no extreme dips or stuttering.

I do have the updated drivers and have performed a clean install, too.

I guess a better CPU would rock the game harder. I dunno. I just don't understand because my CPU never gets above 50% with both cards running.

Vitric9 · Apr 20, 2015

redflamingolingo :

Well yours is a fast CPU at 3.5-3.9GHz and really the fastest architecture available with Haswell. Overclocking can help performance but the improvements i notice the most is in min framerate and frametime. and FPS does go up sometimes.
While GTA V does utilize multiple core processors , just as any other DX11 title it hammers only one core at a time, in serial. Do you ever see one core pinned at 100% and the rest just hovering where ever, usually 30-60% , anyway, i catch ya next time. Goodnight

redflamingolingo · Apr 20, 2015

One core never gets above 70% or so. Temps are fine at 60 degrees for both gpus and the cpu.

Watch Dogs does the same, though. SLI is horrible with it and completely unstable. Weird thing is Assassins Creed:Unity is giving me amazing performance with both gpus at or above 90% utilization and a pretty locked 60fps. Playing that in 4K with all settings maxed also.

I expected the same from GTA V. Thi s is pretty disappointing. These two carda should murder this game. Instead, I get great performance with one and really crappy performacr with two.

Thanks for your help!

Edward Wokhands · Jun 8, 2015

Hey, sorry for posting on an old topic but I'm having the same problem. 2x 970 here and I'm shocked at the performance. I was getting 60fps not long ago with 1440 resolution and ultra everything (MSAA x8, I had something turned down, maybe shadows draw distance?) and I'm suddenly getting terrible performance. I really hope they fix this because I'm getting 30-40% on both cards with 40fps in certain areas.

I'm still wondering if the game has been updated in some way because my performance was definitely better a few weeks after the game released. I just checked a few older drivers and nothing is making a difference.

garneroutlaw · Jul 4, 2015

What mobos you guys using? You should be getting more out of your cards. Whats the point of running sli when they only run as fast as one card? Im RMAing my mobo to see if it fixes it. I only get a max 70% out of sli and poor fps. Dont give me the hogwash they are runnng fine because they ran at 95%+ for weeks until a series of display driver crashes.

Edward Wokhands · Jul 5, 2015

AsRock Extreme4. I upgraded especially to use SLI. I don't have this problem with anything else. By the way I got few driver crashes too a few months ago. It was affecting Aero themes for some reason. The Witcher driver fixed it.

Pretty much all games work perfectly apart from this so I don't think it's a motherboard issue. I've noticed something strange though, it runs at a more stable framerate when I mirror the display on 2 monitors instead of disabling or extending the others. The game is kind of okay apart from a few locations where GPUs both drop to low usage and low framerate. Surely overall though, GPUs as powerful as these shouldn't have this much trouble running this should they?

garneroutlaw · Jul 5, 2015

I don't think so. Although Ive only owned a handful of cards, Ive always had problems with driver crashes and odd problems with Nvidia cards. Never had an issue with my radeon cards back in the day. I think I'll be team red with my next upgrades.

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