Doom 4 GTX1080 SLI Performance Issues

crinkleshoes · 11 Jun 2016 at 16:20

Hey,

Anyone else getting issues with SLI @ 4K in this game?

With SLI enabled, I am getting 45-50FPS with dips into the low 20s.

Running on only a single card, it's averaging 70-75FPS without any dips below 60FPS... very impressive single card performance - but what the heck is up with SLI?

I have tried changing the settings in Nvidia control panel to force AFR1/AFR2 but that doesn't make much difference and the utilisation is sitting at about 65% for GPU1 and 35% for GPU2.

shankly1985 · 11 Jun 2016 at 16:26

Far has I know Id TEch engine doesn't support MGPU

easyrider · 11 Jun 2016 at 16:35

Sli for pascal is currently broken

beany_bot · 11 Jun 2016 at 16:39

SLI doesn't work for Doom.

Shockwave · 11 Jun 2016 at 16:40

Isn't it coming with the next patch tho?

NoobCannon · 11 Jun 2016 at 16:44

Sli does work for doom. Runs fine on 980ti's

shankly1985 · 11 Jun 2016 at 16:46

NoobCannon said:
Sli does work for doom. Runs fine on 980ti's

You sure? Last I heard the Engine doesn't support MGPU.

PixelChef · 11 Jun 2016 at 16:49

I'm pretty sure it works on the engine, however you have to be on the right drivers. Try 365.10, that's what I'm using and I get the best performance with SLI. If I update the drivers I get lower FPS, even the "doom optimized" driver.

NoobCannon · 11 Jun 2016 at 16:51

Im not at home to check driver revisions.

Im not on the latest driver. Am on the one before and sli works it didnt however work on the one before that. Not sure how that helps at all lol

smogsy · 11 Jun 2016 at 16:58

PixelChef said:
I'm pretty sure it works on the engine, however you have to be on the right drivers. Try 365.10, that's what I'm using and I get the best performance with SLI. If I update the drivers I get lower FPS, even the "doom optimized" driver.

technically you are correct & wrong at the same time.

The driver illiterately just changes the doom settings to AFR mode, which has not very good scaling if at all.. & in many cases it gives you worse FPS. (look at certain dirty glass windows.

So yes SLI works but can give much lower miniiums than A single card.

Doom will not work correctly with MGPU until Vulkan, Then Maybe it work correctly

crinkleshoes · 11 Jun 2016 at 17:06

PixelChef said:
I'm pretty sure it works on the engine, however you have to be on the right drivers. Try 365.10, that's what I'm using and I get the best performance with SLI. If I update the drivers I get lower FPS, even the "doom optimized" driver.

That driver version isn't compatible with the 1080 though, is it?

smogsy · 11 Jun 2016 at 17:08

365.10 onwards is fine

PixelChef · 11 Jun 2016 at 17:14

smogsy said:
technically you are correct & wrong at the same time.

The driver illiterately just changes the doom settings to AFR mode, which has not very good scaling if at all.. & in many cases it gives you worse FPS. (look at certain dirty glass windows.

So yes SLI works but can give much lower miniiums than A single card.

Doom will not work correctly with MGPU until Vulkan, Then Maybe it work correctly

Fair enough

I'm sticking with this driver till Vulkan.

crinkleshoes said:
That driver version isn't compatible with the 1080 though, is it?

Ah good point, don't think so. Unlucky for you

May have to wait a bit.

crinkleshoes · 11 Jun 2016 at 18:10

Switched to the only other driver compatible with 1080 - 368.25 - and no improvement

LewisRaz · 11 Jun 2016 at 18:16

I havnt played it myself but i let a mate play on my machine last night and I was noticing doom was dropping to what looked like under 30s at some points. Havnt looked into it yet but will put it on 1 card and report back

EDIT

On SLI it randomly drops down to 29 when there is enemies on screen (MP)
Running just 1 card it stays at 60 no drops.

This is on 1080 on nightmare settings

crinkleshoes · 11 Jun 2016 at 19:21

Yeah - I have the same thing happening. Especially when you get up close and personal with the enemies... but with a single card, I haven't seen it drop below 60FPS... usually in the 70-75FPS range without an overclock, on nightmare settings.

Hopefully they'll have it sorted at some point... but I am mightily impressed with the single card performance at 4k - really good numbers

Five.Stars · 11 Jun 2016 at 19:43

It is stories like this that are putting me off ordering a 2nd EVGA SC.

My previous SLI experience was mostly positive (780Ti's), but there was some really frustrating times with it as well. Watch_Dogs, I am looking at you!

smogsy · 11 Jun 2016 at 19:50

Five.Stars said:
It is stories like this that are putting me off ordering a 2nd EVGA SC.

My previous SLI experience was mostly positive (780Ti's), but there was some really frustrating times with it as well. Watch_Dogs, I am looking at you!

im not arguing here, but its pretty common knowledge that Doom was not going to support SLI as its openGL.

MUltiGPU really is in the developers hands right now.

1. Developers have to code their frames so their not dependent the before/next frame which means Nvidia Can create SLI profiles for.

2. If developers do not do 1. Nvidia cannot help & its up to the Developer.

3. then you got Ms pushing their unified platform which Developers could love, creates a bigger market for them to use & possiblity of easier ports from Xbox.

So Hard times ahead, i always beebn a SLI/Xfiore user since the Nvidia 280GTX, however i really hope developers stay on DX11 for much longer till they have the real skills to Support MultiGPU. DX12 has some benefits but, their not night & day like SLI/Xfire Vs no SLI/Xfire

Dave2150 · 11 Jun 2016 at 19:59

smogsy said:
So Hard times ahead, i always beebn a SLI/Xfiore user since the Nvidia 280GTX, however i really hope developers stay on DX11 for much longer till they have the real skills to Support MultiGPU. DX12 has some benefits but, their not night & day like SLI/Xfire Vs no SLI/Xfire

The industry as a whole doesn't care about SLI/Crossfire, as it's an extremely niche technology. Why on earth would they invest time and money into something that will not benefit 99.9% of gamer's in the slightest?

More money spent on single GPU game development would serve the best purpose for the vast majority of gamers.

smogsy · 11 Jun 2016 at 20:02

because some developers actually care & some developers like to learn how to do things right in their OWN time. including myself.

Take Overwatch for example 100% SLI scaling
CD Projects Red, Massive UI updates to Witcher 3 months later.

will most care no? so what i say to them is stay on DX11 and let NV/AMD do the work for you until you learn to code games right

Multi-core GPU is the future, developers need to get a kick start now.

The future is multi-core GPU's, im not talking SLI/Xfire, im talking Graphic cards with 10+ tiny GPU dies/cores on one board. which essentially is close to MGPU