Optimal way to run 3 GPUS

[DookieNukie]

Hello everyone, i am admittedly a bit of a newbie to the computer building space, i've put together pcs with family but never my own. i recently got a good paying tech job and im looking to make a really over the top rig since money is not an option ( within reason).Ideally i would be using 2 or 3 gpus ideally like 2 7900 XTX's or like 3 RX 6950 XT's and i'd like to be using a motherboard that takes DDR5 i bought a Lian Li Dk04f so space shouldn't be an issue but i'm still piecing together the rest. So i'm wondering the optimal way to make this work or if there's any specific motherboards that i should be looking towards

 

[erocker]

Unless you're running them separately for some reason, multi-gpu isn't supported any longer.

 

[eidairaman1]

Unless if the software supports mgpu/crossfire it is no longer relevant to run 2 gpus a Sapphire 7900XTX Toxic is pretty over the top

 

[Shrek]

Unless you're running them separately for some reason, multi-gpu isn't supported any longer.

Then I'm confused; what are these graphs saying?

24GB VS 16GB RAM Is the 4080 worth buying?

Hello, I have a 3090ti and can take it back. I will use the card for gaming, productivity, 3D design, 3D rendering, movie editing. The 4080 is faster than the 3090ti in gaming sometimes not buy lots, and faster with productivity. Does having 24gb of ram do better with 3D rendering more...

www.techpowerup.com

 

[claes]

Software that supports multi-GPU…

 

[ir_cow]

Software that supports multi-GPU…

barely

@DookieNukie I'm sorry to say but SLI and Crossfire is dead and gone. The remnants still exist, but unless your doing rendering / CUDA or OpenCL workloads and not gaming, Stick to one card.

 

[claes]

barely

@DookieNukie I'm sorry to say but SLI and Crossfire is dead and gone. The remnants still exist, but unless your doing rendering / CUDA or OpenCL workloads and not gaming, Stick to one card.

(If you follow the link you’ll notice that that’s what Puget is testing )

 

[erocker]

Then I'm confused; what are these graphs saying?

24GB VS 16GB RAM Is the 4080 worth buying?

Hello, I have a 3090ti and can take it back. I will use the card for gaming, productivity, 3D design, 3D rendering, movie editing. The 4080 is faster than the 3090ti in gaming sometimes not buy lots, and faster with productivity. Does having 24gb of ram do better with 3D rendering more...

www.techpowerup.com

It's really hit or miss and it's only with the uber-top-tier cards. Yeah, I didn't know they continued it with the 4090!

 

[P4-630]

You could build 3 PC's for having lan parties with your friends....

 

[3x0]

It's really hit or miss and it's only with the uber-top-tier cards. Yeah, I didn't know they continued it with the 4090!

Continued what, SLI? If so, SLI isn't available on the 4090. The software itself supports multiple cards regardless of SLI

 

[erocker]

Continued what, SLI? If so, SLI isn't available on the 4090. The software itself supports multiple cards regardless of SLI

"Supports" is the part that's hit or miss.

 

[wolf]

Sorry i couldn't resist.

Serious answer, this is essentially a waste of time for gaming, there may still be a handful of games that support Multi GPU in which case you want all 3 to have the most bandwidth possible, and ideally all the same I believe, 3x pci-e 16x slots at 16x speed, which is a tall order on most chipsets, you might get 3x 8x speed or 3x 4x speed.

If it's for production workloads, then they can all be mismatched in terms of slot speeds, the card you want to game on, use the fastest slot and the strongest card, and install the others as you see fit with as many lanes as you can give them. I don't really have much experience with production work on video cards however so perhaps they need very little pci-e bandwidth.

 

[eidairaman1]

View attachment 274278


Sorry i couldn't resist.

Serious answer, this is essentially a waste of time for gaming, there may still be a handful of games that support Multi GPU in which case you want all 3 to have the most bandwidth possible, and ideally all the same I believe, 3x pci-e 16x slots at 16x speed, which is a tall order on most chipsets, you might get 3x 8x speed or 3x 4x speed.

If it's for production workloads, then they can all be mismatched in terms of slot speeds, the card you want to game on, use the fastest slot and the strongest card, and install the others as you see fit with as many lanes as you can give them. I don't really have much experience with production work on video cards however so perhaps they need very little pci-e bandwidth.

He would need a Threadripper to have max pcie 16 bandwidth

 

[P4-630]

He would need a Threadripper to have max pcie 16 bandwidth

Threadripper Pro, the first gen threadrippers are being raped by midrange CPU's nowadays...

 

[eidairaman1]

Threadripper Pro, the first gen threadrippers are being raped by midrange CPU's nowadays...

Connectivity of early TR is still higher

 

[64K]

Gaming....... Don't buy 3 GPUs.

Are going to do other things with this proposed rig?

 

[DemonicRyzen666]

Hello everyone, i am admittedly a bit of a newbie to the computer building space, i've put together pcs with family but never my own. i recently got a good paying tech job and im looking to make a really over the top rig since money is not an option ( within reason).Ideally i would be using 2 or 3 gpus ideally like 2 7900 XTX's or like 3 RX 6950 XT's and i'd like to be using a motherboard that takes DDR5 i bought a Lian Li Dk04f so space shouldn't be an issue but i'm still piecing together the rest. So i'm wondering the optimal way to make this work or if there's any specific motherboards that i should be looking towards

asking this question here you will get nothing but hate beause this is a gamer orientent forum any more, & not an enthiusiat PC forum.
How ever if you want some help in the games that support mGPU features I can help you.
There maybe only 1 game that supports 3 cards though I haven't confrimed this. Metro Exodus < not "the enhanced edition" the reason for this is that it has PhysX on it, that should be able to use GPU physX since it uses a lot of older DX11 code. RX 400-500 seems to support DX12 mGPU on them.

As for the games that can support mGPU

I don't use DRM games so My list is made by coloring them for the purpose of differentiating them for each other.

Normal found on G.O.G
Red Not confirmed to support mGPU
purple behind a DRM platform
Green behind a DRM but Confrimed to support mGPU
underlined games I have that I can check eventually
Blue exclusively Dx12
Bolded Raytracing games
??? = unknow to support, but sometimes shown to support mGPU in videos or reviews.

1. Ashes of the Singularity Nitrous engine Explicit mGPU use Game engine does it all
2. Battlefield I (Sli & crossfire support) Frostbite3
3. Battlefield V (Crossfire support) Frostbite3
4. Chasm: The Rift (2022) (VulKan) ???
5. Civilization VI (SLI maybe turing only for DX12) Gamebryo engine
6. Cyberpunk 2077 ??? exclusively Dx12
7. Deiliver use the Moon (SLI supported) Unreal 4 engine
8. Deus ex Mankind divided (SLI supported, Crossfire supported) Dawn Engine
9. Forza Horizon 3 (SLI & crossfire supported) Unreal4
10. Froza horizon 4 (SLI supported) ForzaTech
11. Forza Motorsport 6 Apex (SLI supported & crossfire) FrozaTech
12. Forza Motorsport 7 (SLI supported) ForzaTech
13. Gears Of war 4 (SLI & crossfire Supported) Unreal4 engine
14. Gears of war ulimate eidition (Crossfire & SLI supported) unreal3 engine
15. Hammerting (VulKan)
16. horizon Zero Down ??? exclusively Dx12
17. Journey to the Savage Planet (SLI For NVIDIA Turing GPUs) Unreal4 engine
18. Madden NFL 19 (SLI supported)Frostbite3
19. Madden NFL 20 (SLI support) Forstbite3
20. Merto Exodus (SLI only) A4engine
21. Minecraft RTX ???
22. mircosoft slight sumlator ???
23. Moster Hunter World ???
24. Mortal Kombat 11 (SLI supported) unreal3 engine
25. No Man's Sky (VulKan SLI support) VulKan
26. Red dead Rememption 2 (VulKan) exclusively Dx12
27. Resident Evil 7 Biohazard (SLI & Crossfire supported) steam verision only has raytracing
28. Path of Exlie (SLI support)
29. Rise of the Tomb Raider (SLI Supported, Crossfire supported) The Foudation engine
30. Shadow of the Tomb Raider (D3D12AFR Both SLI and Crossfire, Not supported in DX11) The Foudation engine
31. Spiderman Remaster ???
32. Sniper Elite 4 (Crossfire & SLI supported )
33. Strange Brigade (SLI supported in Vulkan) Asura engine exclusively Dx12
34. The Meduim (SLI turing only Implicit) Unreal4 engine
35. Totalwar Warhammer (Crossfire & SLI support)
36. Totalwar Wahammer II (SLI support)
37. watchdogs leigion ???
38. Will to live Online (SLI support) ???
39. Wolfenstein II: The New Colossus
40. X4: Foundations (Vulkan) sli

This list is constantly changing with games coming out on DX12 & raytracing.
Currently There as of this post on 12/13/22 there are 269 DX12 games.
While there 149 games on DX12 that support so type of raytracing.

 

[P4-630]

asking this question here you will get nothing but hate beause this is a gamer orientent forum any more, & not an enthiusiat PC forum.

Gamers and Enthusiasts here!

 

[64K]

asking this question here you will get nothing but hate beause this is a gamer orientent forum any more, & not an enthiusiat PC forum.

The OP isn't getting hate here. This site is called TechPowerUp for a reason. It's Tech. Gaming is just one aspect of Tech.

 

[DemonicRyzen666]

The OP isn't getting hate here. This site is called TechPowerUp for a reason. It's Tech. Gaming is just one aspect of Tech.

No this is gamer forum anymore look at all the games in the review they all have to have a huge amount of players playing them to even be in the reviews here; regaurdless of how well the game engine works.
Even if it's a crappy coded game, but everyone plays it's, it's on in the review.
If this were an enthuiast forum they would care more about how well the game works with the system & how even the load can be put across the entire system, or how well it brings a system with high end GPU's & cpu's to their knees.

 

[64K]

No this is gamer forum anymore look at all the games in the review they all have to have a huge amount of players playing them to even be in the reviews here; regaurdless of how well the game engine works.
Even if it's a crappy coded game, but everyone plays it's, it's on in the review.
If this were an enthuiast forum they would care more about how well the game works with the system & how even the load can be put across the entire system, or how well it brings a system with high end GPU's & cpu's to their knees.

Should a Tech Site just ignore the hundreds of millions of gamers out there?

I think you should leave some feedback to @W1zzard with your concerns.

 

[DookieNukie]

Gaming....... Don't buy 3 GPUs.

Are going to do other things with this proposed rig?

I was not expecting so many replies but it’s actually not meant for like gaming primarily, I really only play rts games tbh so it’s not for that. I do 3D animation in cinema4d and octane render engines for fun an I also code

No this is gamer forum anymore look at all the games in the review they all have to have a huge amount of players playing them to even be in the reviews here; regaurdless of how well the game engine works.
Even if it's a crappy coded game, but everyone plays it's, it's on in the review.
If this were an enthuiast forum they would care more about how well the game works with the system & how even the load can be put across the entire system, or how well it brings a system with high end GPU's & cpu's to their knees.

To be fair I really wouldn’t consider this hate it’s more informative if you go on Reddit and ask a question with an answer you weren’t aware of the responses would be much harsher. But I do appreciate the feedback the rig would probably not prioritize gaming as much as 3D rendering in Cinema4D with Octane Render engine and like hdr mapping stuff

 

[P4-630]

I really only play rts games tbh so it’s not for that. I do 3D animation in cinema4d and octane render engines for fun

Well there's only one real top dog GPU at the moment, the RTX 4090.

 

[DemonicRyzen666]

To be fair I really wouldn’t consider this hate it’s more informative if you go on Reddit and ask a question with an answer you weren’t aware of the responses would be much harsher. But I do appreciate the feedback the rig would probably not prioritize gaming as much as 3D rendering in Cinema4D with Octane Render engine and like hdr mapping stuff

I've also been reading Unrealengine fourms & rendering forums too. Developers can't get mutliple RTX 6000 or RTX 4090 to combine in some Render engines. it seems like Nvidia is locking out Nvlink on Ada lovelace. Many of them are really kind of mad about it. They were even have trouble with CUDA software that supports muliple cards on it, with Ada lovelace. They could only get one card to work with it.

 

[DookieNukie]

Well there's only one real top dog GPU at the moment, the RTX 4090.

So tbh I’d consider the 4090 If it weren’t for the price gouging for one. $1500 fine, 2.5-3k? A 100% markup big nope from me. Beyond that the whole 12 pin melting thing concerns me a bit I know the failure rates not crazy high and it’s primarily from one manufacturers factory but the idea of buying one when they don’t have any active recalls on it bothers me

I've also been reading Unrealengine fourms & rendering forums too. Developers can't get mutliple RTX 6000 or RTX 4090 to combine in some Render engines. it seems like Nvidia is locking out Nvlink on Ada lovelace. Many of them are really kind of mad about it. They were even have trouble with CUDA software that supports muliple cards on it, with Ada lovelace. They could only get one card to work with it.

Thaaats upsetting I really rather not pay for a render farm on big projects either rock an hard place I guess