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AnsweredHot!Red Dead Redemption 2: SLI Support

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squall-leonhart
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:09:21 (permalink)
Sajin
squall-leonhart
Sajins profile is garbage. (Sorry Sajin, but its fact)
 
You cannot force SLI on Vulkan or DX12 api's, the Driver has no capability to make this work and RDR2 has no DX11 renderer.
 
It's already been demonstrated by a 1080ti user that Vulkan MGPU can work, but it requires specific in game settings, play around with them and see if you can get it to.


No offence taken. What is the point of Vulkan MGPU if you have to run certain settings to make it work? MGPU should work at all settings not just certain ones.




Agreed it should be able to use all the available settings, but some things are harder to parallize across device nodes than others.
 
I am wondering what the go is with some getting MGPU out of the box, and others not getting it at all
 
"Berke53, post: 5728125, member: 249722"GTX 1080 SLI owner here. Apparently this game supports multi gpu using the vulkan api out of the box. Both cards are pegged at 99% and performance is increased by an average of 60%. However... In some areas there seem to be some flickering and performance issues with a mgpu config. Also.. The afterburner OSD is flckering constantly. Its really interesting to see this as this is the first vulkan game utilizing both cards. Apparently rockstar wanted to support mgpu rendering in this title but they only came half way. I really hope they keep coding improvements for this as it is not a luxurity to have more than one gpu for this incredibly gpu hungry game.

 

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Sajin
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:15:40 (permalink)
Don't know. Mine didn't work right out of the box.

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squall-leonhart
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:17:01 (permalink)
I'm gunna try to get more info from him.
 
Its possible the game uses implicit mgpu and needs sli disabled in the nvcp.

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mhijazi
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:17:25 (permalink)
kevinc313
 
Are you still planning to get 2080 Ti's in SLI?  At this point you may be better off waiting for the next gen and getting a single card with a big AIO/hybrid.



Well I don't know. I am still considering getting 2080 Ti's and I am also considering to wait for next gen. It depends on my patience. Apparently new games doesn't support SLI without tweaking and most of the games I want to play now are very demanding. RDR2 and in few months cyberpunk 2077. so I don't know.
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zYxMa
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:19:06 (permalink)
So we can't play RDR2 at 4K60? :/
 
I tried the profile trick on my 1080s - didn't work.
 
...what's the point...
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:19:26 (permalink)
squall-leonhart
I'm gunna try to get more info from him.
 
Its possible the game uses implicit mgpu and needs sli disabled in the nvcp.


Ok. 
 
I'll try that out.

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squall-leonhart
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:20:48 (permalink)
Getting my terminology wrong,
 
Explicit and Implicit are both LDA (requires SLI)
Game might incorporate MDA, SLI enabled would lock support to LDA methods and prevent MDA working.

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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:24:16 (permalink)
stash51
CAPS, not bold smart guy. And quit going off topic with your nonsense.

You've joined this forum almost 11 years ago and you saved your first post to make an OFF TOPIC comment about me not staying on topic? Really? Caps or bold, same difference. He was trying to imply that I didn't realize the difference. No go back to your hole and stay there. I'm am adding to this conversation by giving single card metrics to compare to in a high end system. 
 
 
@ Sajin, I think something is a bit off with your system's performance. I just rand a quick 4K test to compare and I'm getting significantly better results with the same settings you used.
 
These are my "built in" benchmark results at 4K

 
And just a quick snap of actual in game performance

 
In game fps seems to fluctuate between 50-70fps at 4K with everything maxed for me. Though to be fair I've only just played about 10 mins at 4K on my other monitor as I greatly prefer the ultrawide experience. 
post edited by CraptacularOne - 2019/11/06 13:29:25

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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:25:53 (permalink)
CraptacularOne
kevinc313
CraptacularOne
Everything maxed getting 70+ fps in game, upwards of 90-100 when in towns that don't have a bunch of alpha and particle effects like snow. Running on a single RTX 2080 Ti at 3840x1080 ultrawide. 
 

 




You're at about 10% more pixels than 1440p.  Typical 4K will be DOUBLE the pixels and give 45fps with a 2080Ti in RDR2 with max settings.


Are you really trying to state that in bold like I don’t know the pixel count Of 4K? Seriously? 




8,294,400 Pixels in 3840x2160 so you saying that 3840x1080 is a very high resolution is not very accurate. It also has nothing to do with the question of running SLI which would truly benefit people actually running VERY HIGH resolutions like 3840x2160. You just wanted to show off your low vertical resolution ultrawide and your 2080ti I guess. It has nothing to do with this topic. 
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Sajin
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:28:12 (permalink)
SLI on, or SLI off with the original profile does nothing.

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kevinc313
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:29:03 (permalink)
joeymir
Been eagerly awaiting this title, however I am just looking for feedback from others with Multi-GPU systems and see if it has SLI support. From what I am gathering, the answer is no or limited, however that was not a good source. From what performance numbers look like for this game, I'd be disgusted to see it not have day 1 SLI/Crossfire support knowing how demanding it is and how much it could benefit from SLi/Crossfire. But knowing how the industries state of affairs......it would not surprise me if SLI/Crossfire were both non-functional. Anyway hope to hear feedback from those who have tried.




I said this in another thread, but I'll say it here.  Knowing Rockstar they have one or two settings that completely kneecap the game's performance but have zero impact to the graphical quality of the game.  One of the big offenders is the GRASS settings in GTA V.  I think they are just trolling us in the vein of "will it run Crysis".
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:31:35 (permalink)
mhijazi
kevinc313
 
Are you still planning to get 2080 Ti's in SLI?  At this point you may be better off waiting for the next gen and getting a single card with a big AIO/hybrid.



Well I don't know. I am still considering getting 2080 Ti's and I am also considering to wait for next gen. It depends on my patience. Apparently new games doesn't support SLI without tweaking and most of the games I want to play now are very demanding. RDR2 and in few months cyberpunk 2077. so I don't know.




Maybe get a deal on the Kingpin?  Already has a 240mm AIO and is about as much as you're going get out of a single card.  I'd say if you can get one for about $1600 or so you're doing really good.
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dataplague
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:36:20 (permalink)
if shadow of the tomb raider works dx12 sli, why cant read dead
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claudione314
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:36:20 (permalink)
I apologize for the noob question, but how can I tell in-game that it’s using both cards instead of one? My 1080 TIs (11GB each) are sli enabled in the NVIDIA control panel, but available video memory in the game is 9GB. If both were enabled, would it show something like 18? Is that it? Or how else?
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squall-leonhart
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:39:09 (permalink)
kevinc313
joeymir
Been eagerly awaiting this title, however I am just looking for feedback from others with Multi-GPU systems and see if it has SLI support. From what I am gathering, the answer is no or limited, however that was not a good source. From what performance numbers look like for this game, I'd be disgusted to see it not have day 1 SLI/Crossfire support knowing how demanding it is and how much it could benefit from SLi/Crossfire. But knowing how the industries state of affairs......it would not surprise me if SLI/Crossfire were both non-functional. Anyway hope to hear feedback from those who have tried.




I said this in another thread, but I'll say it here.  Knowing Rockstar they have one or two settings that completely kneecap the game's performance but have zero impact to the graphical quality of the game.  One of the big offenders is the GRASS settings in GTA V.  I think they are just trolling us in the vein of "will it run Crysis".





Yep, the games meant to be run on mostly high with current gen and grass/volumetric and particles on medium.
 
Sajin
SLI on, or SLI off with the original profile does nothing.




i'll let you know if i find new info

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Re: Red Dead Redemption 2: SLI Support 2019/11/06 13:41:36 (permalink)
CraptacularOne
kevinc313
CraptacularOne
Everything maxed getting 70+ fps in game, upwards of 90-100 when in towns that don't have a bunch of alpha and particle effects like snow. Running on a single RTX 2080 Ti at 3840x1080 ultrawide. 
 

 




You're at about 10% more pixels than 1440p.  Typical 4K will be DOUBLE the pixels and give 45fps with a 2080Ti in RDR2 with max settings.


Are you really trying to state that in bold like I don’t know the pixel count Of 4K? Seriously? 




I was pretty sure you knew, but I was also pretty sure you could do a better job communicating.  Hence the ALL CAPS.
 
AS I'M QUITE SURE YOU KNOW, your rez is directly comparable to 2K / 1440p and cannot be directly compared to typical 4K.
 
 
 
 
 
 
 
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 14:27:06 (permalink)
CraptacularOne
stash51
CAPS, not bold smart guy. And quit going off topic with your nonsense.

You've joined this forum almost 11 years ago and you saved your first post to make an OFF TOPIC comment about me not staying on topic? Really? Caps or bold, same difference. He was trying to imply that I didn't realize the difference. No go back to your hole and stay there. I'm am adding to this conversation by giving single card metrics to compare to in a high end system. 
 
 
@ Sajin, I think something is a bit off with your system's performance. I just rand a quick 4K test to compare and I'm getting significantly better results with the same settings you used.
 
These are my "built in" benchmark results at 4K

 
And just a quick snap of actual in game performance

 
In game fps seems to fluctuate between 50-70fps at 4K with everything maxed for me. Though to be fair I've only just played about 10 mins at 4K on my other monitor as I greatly prefer the ultrawide experience. 

Probably old cpu syndrome. You overclocking your gpu? I did another run and was able to pull off a 42 average.
post edited by Sajin - 2019/11/06 14:29:07

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jzer0912
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 14:30:50 (permalink)
Hi All,
 
So, just for context, I have two Titan Xps.  The SLI profiles suggested in this thread do not have any effect for me, SLI simply does not engage and only the primary GPU is working.  However, the method suggested on youtube to essentially force it to use the same profile as GTAV does result in both GPUs functioning.   This is only with Vulkan, does not work if set to DX12.  However, for me it causes such an awful stutter that it basically makes the game unplayable.  His video shows it seeming to function properly, but apparently he's running with all settings on medium to overcome some of the flickering and stuttering this seems to cause, which makes this solution even less viable as the whole point is to get a better framerate on all Ultra in 4K.  However, the claims saying that Vulkan doesn't support SLI are false.  This was added a few months ago to Vulkan and was supported by the last version of nvidia's drivers.  This is also why a driver rollback seems to be another possible solution as this is prior to the Red Dead 2 profile being added which is likely preventing vulkan from enabling SLI.  This is probably due to the range of issues it causes.  Hopefully they'll be able to fix in a later update, but this may just be wishful thinking.      
post edited by jzer0912 - 2019/11/06 14:35:36
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CraptacularOne
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 14:39:26 (permalink)
Sajin
CraptacularOne
stash51
CAPS, not bold smart guy. And quit going off topic with your nonsense.

You've joined this forum almost 11 years ago and you saved your first post to make an OFF TOPIC comment about me not staying on topic? Really? Caps or bold, same difference. He was trying to imply that I didn't realize the difference. No go back to your hole and stay there. I'm am adding to this conversation by giving single card metrics to compare to in a high end system. 
 
 
@ Sajin, I think something is a bit off with your system's performance. I just rand a quick 4K test to compare and I'm getting significantly better results with the same settings you used.
 
These are my "built in" benchmark results at 4K

 
And just a quick snap of actual in game performance

 
In game fps seems to fluctuate between 50-70fps at 4K with everything maxed for me. Though to be fair I've only just played about 10 mins at 4K on my other monitor as I greatly prefer the ultrawide experience. 

Probably old cpu syndrome. You overclocking your gpu? I did another run and was able to pull off a 42 average.

Yeah the 2080Ti is running at roughly 2Ghz for gaming settings with 16000Mhz memory. What CPU are you running?

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davidstone83
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 14:40:59 (permalink)
I am asking/asked for a refund. If they don't fix SLI I won't buy. even if they do I will wait and buy from steam for steam link. 
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Baasha
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 14:45:37 (permalink)
There is some good info in this thread and a lot of garbage at the same time.
 
First, this is NOT the first game to utilize MGPU with Vulkan API. That honor goes to Strange Brigade which works perfectly well out of the box with the Vulkan API (see video).
 
Sajin's profile is pretty good in non-snowy areas (Ch. 2 and later). In the snowy areas, or anywhere there is snow overlapped with hard rock/mountains etc., the flickering and artifacting are severe. There are also occasional CTDs that occur due to forcing MGPU.
 
Word on the street from a special someone I know states that Nvidia intentionally gimped MGPU for this title with the latest driver. It apparently is disabled in the driver flag.
 
The only solution I can think of is rolling back to the previous driver and trying Sajin's profile and seeing if it works.
 
However, at the end of the day, this game's MGPU support/implementation is pile of junk - there is simply too much artifacting, CTDs, stuttering etc. to make the game playable with more than one GPU.
 
I have had 4-way SLI since 2011 and have owned every Titan GPU (4 of them, each time around, except for Titan V & Titan RTX which I have only two).
 
Until/unless Nvidia enables MGPU support at the driver level for this game and/or Rockstar spend some actual resources into implementing it, I don't see MGPU being viable for RDR2.
 
Consoles ruined PC gaming. And now, Nvidia themselves are gimping support since they want to sell more GPUs every generation (thereby discouraging people buying/using multiple GPUs over several generations).
 
Nvidia - 1
PC Gamers - 0
 
Strange Brigade Vulkan API utilizing 2x Titan RTX beautifully (> 230fps maxed out in 4K): 
 
https://www.youtube.com/watch?v=69NlalVbXJU

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Sajin
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 15:17:56 (permalink)
CraptacularOne
Sajin
CraptacularOne
stash51
CAPS, not bold smart guy. And quit going off topic with your nonsense.

You've joined this forum almost 11 years ago and you saved your first post to make an OFF TOPIC comment about me not staying on topic? Really? Caps or bold, same difference. He was trying to imply that I didn't realize the difference. No go back to your hole and stay there. I'm am adding to this conversation by giving single card metrics to compare to in a high end system. 


@ Sajin, I think something is a bit off with your system's performance. I just rand a quick 4K test to compare and I'm getting significantly better results with the same settings you used.

These are my "built in" benchmark results at 4K


And just a quick snap of actual in game performance


In game fps seems to fluctuate between 50-70fps at 4K with everything maxed for me. Though to be fair I've only just played about 10 mins at 4K on my other monitor as I greatly prefer the ultrawide experience. 

Probably old cpu syndrome. You overclocking your gpu? I did another run and was able to pull off a 42 average.

Yeah the 2080Ti is running at roughly 2Ghz for gaming settings with 16000Mhz memory. What CPU are you running?


5960x @ 4.4 GHz.

Want to save 5 to 10% on your next EVGA purchase? Just click on the associates banner to save, or enter the associates code at checkout on your next purchase. If you choose to use my code I want to personally say "Thank You" for using it.
 

 
#82
CraptacularOne
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 15:40:24 (permalink)
Sajin
 
 
5960x @ 4.4 GHz.


Hmm, granted I have double the core count you do but that shouldn't really matter since this game does not really scale past 8 threads anyway. I only have a 200Mhz advantage in clock speed too. Regardless of that though at 4K you should be completely GPU bound anyway. Are both your cards running at X16 link width and are they overclocked at all or stock speeds?

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atomicfire555
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 16:47:53 (permalink)
Sajin, I cant seem to get it to work using your profile, can I ask, are you using the game ready drivers? or 441.08? I exported the profile to a text and edited it with your profile and ingame nothing changed.
 
Edit: I managed to get sli active, but after loading the game I get a black screen.
 
What am I doing wrong?
post edited by atomicfire555 - 2019/11/06 18:32:40
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 17:03:58 (permalink)
Can't seem to get the profile working on my 2x 2080 Ti's either, game loads up to the munu and afterburner shows the load is being split between the two and both cards are clocking up and down. But as soon as I try to continue the story or run a benchmark the game hardlocks with a black screen and either crashes to the desktop, or I have to force end it via the task manager.
 
Tried a few ways of getting this profile to work and same results everytime 
 
Using the current 441.12 driver.

2x RTX 2080 Ti 11GB, 9900K @ 5.0Ghz, Asus Z370 Formula X (BIOS 2203), 2x 16GB Hyper Corsair Vengeance 3000MHz, Corsair AX860i 860w, Samsung EVO 860 2TB
#85
CraptacularOne
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 17:07:46 (permalink)
Well it turns out there may be something to this game and multi core scaling. When I disable half my cores my performance does indeed drop. Makes no sense as there is barely any activity on them. With 16 cores 32 threads native to my CPU my performance is ad I’ve stated. When I knock it down to 8 cores 16 threads I get a score of 43fps average in the built in benchmark. 
 
Seems further investigation may need to be done as something is gimping performance despite the CPU not being really tasked real hard in either case.

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#86
Sajin
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 18:28:20 (permalink)
CraptacularOne
Sajin
 
 
5960x @ 4.4 GHz.


Hmm, granted I have double the core count you do but that shouldn't really matter since this game does not really scale past 8 threads anyway. I only have a 200Mhz advantage in clock speed too. Regardless of that though at 4K you should be completely GPU bound anyway. Are both your cards running at X16 link width and are they overclocked at all or stock speeds?


Yes, my initial posted results were at stock clocks, but I also had sli enabled when I ran with a single gpu, turning off sli, and overclocking gave me a 42 fps average.

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#87
squall-leonhart
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 18:34:54 (permalink)
jzer0912
 However, the claims saying that Vulkan doesn't support SLI are false.   




Vulkan does not support SLI.
 
SLI is a driver side hack which forces games to function in Implicit LDA mode if and where it is possible to do so.
 
Vulkan supports Explicit and Implicit LDA, and MDA but comes under the API's MGPU feature name.

Implicit requires SLI / Crossfire to be active, but are NOT SLI when used to multicard accelerate a vulkan renderer.
post edited by squall-leonhart - 2019/11/06 18:37:25

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#88
dsilvernail
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 20:54:31 (permalink)
I imported this profile but it is not working. Do I need to roll back driver?
#89
atomicfire555
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Re: Red Dead Redemption 2: SLI Support 2019/11/06 21:01:21 (permalink)
dsilvernail
I imported this profile but it is not working. Do I need to roll back driver?

Same problem.
#90
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