2 GPU's in same Computer Without SLI + Does VRAM Stack

Toggle sidebar Toggle sidebar
J

jasonmbell2144

Prominent
Apr 3, 2018
5
0
510
I'm currently using a EVGA GTX 1060 3GB SSC. Looking at the card, there is no SLI support on it.

I want to upgrade my GPU to get 6GB of VRAM, but I thought I could just get the same 3GB GPU so the VRAM stacks to 6GB. But does the VRAM stack if you don't use SLI?

I'm also wondering does my MOBO support 2 GPU's in one PC in the first place? I have a Gigabyte Z370P D3 ATX.

Assuming VRAM does stack, and my MOBO supports 2 GPU's, does gaming without an SLI bridge take advantage of both GPU's, such as GTA, Arma II, or Rainbow 6? Is getting SLI bridge the only thing I can do to make the 2nd GPU work in gaming?
 
Solution
Karadjgne
DX11 games usually have decent sli support, some better than others. DX12 has 0 sli support since it was written for multi-gpu support instead. The difference being sli alternates frames, 1 gpu does 1 frame, the other gpu does next frame, but shunts it's output back to the first gpu which ties them together in a chain. Consequently you only get 1gpu worth of ram at any given frame. With multi-gpu, both gpus work simultaneously as a single gpu (supposedly) which means both rams are added. Supposedly you could run any 2 cards, either nvidia/nvidia, amd/amd or a mix. The ram then stacks (sort-of) since both gpus are tied together. Unfortunately thats a whole heap of extra coding, and game devs were only too happy to not have to include...
Sort by date Sort by votes
Karadjgne

Karadjgne

Titan
Ambassador
Dec 26, 2012
30,740
4,559
142,790
DX11 games usually have decent sli support, some better than others. DX12 has 0 sli support since it was written for multi-gpu support instead. The difference being sli alternates frames, 1 gpu does 1 frame, the other gpu does next frame, but shunts it's output back to the first gpu which ties them together in a chain. Consequently you only get 1gpu worth of ram at any given frame. With multi-gpu, both gpus work simultaneously as a single gpu (supposedly) which means both rams are added. Supposedly you could run any 2 cards, either nvidia/nvidia, amd/amd or a mix. The ram then stacks (sort-of) since both gpus are tied together. Unfortunately thats a whole heap of extra coding, and game devs were only too happy to not have to include sli/cf in DX12 games, and as of yet put any real effort into coding for the mgpu since a single more powerful gpu gets roughly the same performance for lower overall costs.

As of the release of DX12, sli/cf has pretty much become a dead end, especially since many new cards from the 1060 on down don't even support it at all. No physical connectors.
 
Upvote 0 Downvote
Solution
A

aquielisunari

Judicious
Mar 31, 2011
6,499
14
33,015


Save more and possibly wait until the next generation is out. 2080? You have till October to save.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom