tommsgevga13111
Hi Guys,
 
Been playing around with this, I am using 2x 2080 Supers. Tried just about every suggestion I can find on the web, and nothing will stop the flickering on cut scenes. Crashing happens but its quite infrequent so I could live with that, if it was the only issue. It is frustrating becase the performance increase in terms of FPS is quite considerable (90fps vs 50fps)
 
In anyone still playing around with this and have any fresh suggestions for flickering cut scenes in particular?
 
Many Thanks

RUN4Y0URL1F3
The 2 most bothersome issues are the flickering (especially during cutscenes) and water artefacts.

ring0r
...maybe there will be a strongen GPU then the 2080Ti ... so i dont need SLI anymore

• [Zombie Army: Dead War 4][Vulkan]: Game may display flicker when in game HDR is enabled
• [Red Dead Redemption 2][Vulkan]: Random crash during gameplay on Pascal and older GPUs
• [Battleye][Low-Latency Mode]: Launching Battleye with NVIDIA Low Latency Mode set to Ultra may cause DWM to reset
• Twitch Studio shows corruption when Image Sharpening is enabled globally from the NVIDIA Control Panel
• Sonic & All-Stars Racing Transformed crashes when playing in a water level

BaDBoY_uK
I just had a new GFX_ERR crash using Vulkan and SLI
Please dont tell me it's back

olrdtg
 
I'd also be curious to see how Nvidias new CFR SLI rendering mode works when playing in DX12 mode. I may give it a try tomorrow.

olrdtg
I was editing this post too fast and it disappeared.

pfk505

olrdtg



I'd also be curious to see how Nvidias new CFR SLI rendering mode works when playing in DX12 mode. I may give it a try tomorrow.

I've been wondering about that for a while but didn't realize it was actually usable yet? Please report back on how it goes!

I tested CFR SLI in DX12 AND it works! Both GPUs scaling at 96 ~ 98%. Performance is only slightly improved over a single card though, maybe by like 10fps :(

Also there is this weird artifacting, these green squares on screen only appearing with CFR enabled. I really hope Nvidia doesn't ditch CFR and continues working on it. This shows a bit of promise. I can't play RDR2 in Vulkan with SLI for longer than 20 minutes before getting ERR_GFX_STATE issues.



Here's my profile from nvidia inspector if anyone wants to try it, just import it and make sure to set your game to DirectX 12. Lemme know if you experience any weird issues.



https://drive.google.com/...H3hp9/view?usp=sharing



I've also attached some images of the profile settings if you just want to set them yourself.

0x00000002 bits for both SLI DX10+11 and DX12

0x00000005 for NVLink SLI mode

0x00000001 for SLI CFR Mode



EDIT: here is a screenshot of the strange artifacts that appear using CFR mode in DX12 - https://imgur.com/iCeU1nL

Only happens in DX12 with CFR on, guessing it's either AA or a visual effect going wonky with the checkerboard rendering



EDIT 2: Forgot to mention, I played like this for over an hour with no crashes. Performance is very sub-par compared to Vulkans mGPU in the game though. I get a pretty stable 60 FPS at 4K with every setting maxed out except for reflections in Vulkan with SLI. Using CFR it was up and down a lot, swinging between 40 and 54 fps and dips into the 30s in intensive areas. This still beats single card performance for me which usually sat around 40 fps with dips sometimes going into the 20s. I can only hope nvidia finishes their work and gets CFR all worked out so we can use it and get some performance benefit from it. It's quite promising in DX12 games that have raytracing but no form of SLI or mGPU support. I'm still kinda baffled as to why R* enabled multi-gpu on Vulkan, but not on DX12. :\



EDIT 3: Loading the game with this profile, if you close and restart the game, it's likely it'll crash. Delete the d3d12 pipeline files and it should load up. Once I'm in game, I haven't experienced a crash yet. But I close and restart, it gets crashy'. So if you start the game a second time, delete those pipeline files and you will be good to go.



EDIT 4: https://youtu.be/y94fts2Ceuc - I recorded some footage of the glitches that happen using CFR mode. I've tried tinkering with the TAA, FXAA and some other lighting and volumetrics settings, and they don't go away. :\ Also, apparently using the Windows game bar to record tanks your frame rate. Add about 9 fps to the counter at the bottom left in the video for the actual FPS

BaDBoY_uK
Can confirm CFR doesn't work as intended for RDR2. Too many awful glitches that get worse if you up the quality to ULTRA

Flonkam
Doesn't the evidence suggest that if multi-gpu functions in any way at all, it's unrelated to any effort on Rockstar's part?

Nowawaka
 I also don't think SLI in GTA V is all that great you have to crank up the AA and other setting for the game to use more than 50% of my 2080s and it has terrible slow down in areas. So unless your using a custom profile then I would like to know what profile your using its decent I wouldn't call it great, but yes a hell of a lot belter than RDR but GTA is dx11 and rdr is vulkan or dx12. Then you have a crap game like Zombie smtg played it so much I forgot the name lol but SLI worked great in DX12 and Vulkan but even with Hotfix driver I posted earlier it still has HDR issues in vulkan not as bad but nor perfect but dx12 SLI and HDR runs great. R* probably alone made more on in game card sell than that company has made over multiple titles and yet there **** works on day one.

olrdtg

Nowawaka
 I also don't think SLI in GTA V is all that great you have to crank up the AA and other setting for the game to use more than 50% of my 2080s and it has terrible slow down in areas. So unless your using a custom profile then I would like to know what profile your using its decent I wouldn't call it great, but yes a hell of a lot belter than RDR but GTA is dx11 and rdr is vulkan or dx12. Then you have a crap game like Zombie smtg played it so much I forgot the name lol but SLI worked great in DX12 and Vulkan but even with Hotfix driver I posted earlier it still has HDR issues in vulkan not as bad but nor perfect but dx12 SLI and HDR runs great. R* probably alone made more on in game card sell than that company has made over multiple titles and yet there **** works on day one.

That doesn't sound right, you might want to check if everything is working properly for you in GTA V. When I play GTA V, it runs like an absolute dream in SLI, 4K max stable 60 fps or 1440p 120fps. I get a few dips in the city, but it's quite rare, and never drops below 50, but it wasn't always like that. When I first installed the game, put in a few mods, it ran like crap. 60 fps sometimes, mostly 45 ~ 58 in the city or with a lot of traffic around. I found some posts on Steam and reddit that helped me get things running smooth. But, one thing I've learned with RAGE games, if the game doesn't like one thing about your OS or drivers, it'll either run like crap or crash constantly. I'd get more into it but I don't want to get too far off topic here. If you are having trouble with GTA V SLI performance and stability, poke around here, Steam and reddit.
And yeah, I've seen some indie games that run great with SLI right out of the gate, yet these AAA companies can't seem to have a decent launch anymore. I honestly believe it has to do with the "release now, patch later" mentality. These companies set shorter and shorter deadlines for bigger and more ambitious games, then release them in a broken state to meet said deadlines and figure they can just patch the game up later. :(