Crossfire with different VRAM amount?

[GrobfootGaming]

If you had a graphics card that supported SLI or Crossfire, would you be able to crossfire it with a card that has less VRAM?  For example if you had a GTX 960 2gb and GTX 960 4gb version, would they still work or would there be some limitation?  

[Sauron]

Yes, it will just run as if both cards had the lowest common vram amount. Still, I don't recommend having 2 960s in SLI, especially with only 2gb of vram.

 

I think @Kloaked did that but I can't remember if it was him or not

[manikyath]

pretty sure on the nvidia side you cant, but on the amd side you can, with that said, you'd be limited to the lower card's vram on both cards. (cf 2GB & 4GB results in the 4GB card becoming a 2GB card)

[App4that]

Depends, with crossfire you just need two graphics cards with the same GPU. So a 290 4g and 390 8g crossfire. But with SLI you would need two 960 2g, a 960 2g and 4g wouldn't work. But a Asus 960 4g and a  EVGA 960 4g would. 

[GrobfootGaming]

1 minute ago, manikyath said:

pretty sure on the nvidia side you cant, but on the amd side you can, with that said, you'd be limited to the lower card's vram on both cards. (cf 2GB & 4GB results in the 4GB card becoming a 2GB card)

 

So in that case it would not be worth it then haha

[Guest Kloaked]

2 minutes ago, Sauron said:

Yes, it will just run as if both cards had the lowest common vram amount. Still, I don't recommend having 2 960s in SLI, especially with only 2gb of vram.

 

I think @Kloaked did that but I can't remember if it was him or not

On Nvidia's you can't, as they have to match VRAM specs. On AMD you can for the most part.

 

I also agree that getting another 960 isn't worth it.

[Sauron]

Just now, Kloaked said:

On Nvidia's you can't, as they have to match VRAM specs. On AMD you can for the most part.

 

I also agree that getting another 960 isn't worth it.

Really? I thought only the gpu needed to be an exact match.

[Guest Kloaked]

1 minute ago, Sauron said:

Really? I thought only the gpu needed to be an exact match.

It used to be doable mid-Kepler launch I believe, but they locked it down to requiring the same amount of VRAM on both cards some time after that. Makes no sense, I know.

[App4that]

Just now, Sauron said:

Really? I thought only the gpu needed to be an exact match.

Only with AMD, and that's for a reason. You're limited by the lowest VRAM and different VRAM quantities can cause performance issues.

 

I crossfired a 290 and 390 so know this very well  

[GrobfootGaming]

23 hours ago, Kloaked said:

On Nvidia's you can't, as they have to match VRAM specs. On AMD you can for the most part.

 

I also agree that getting another 960 isn't worth it.

 

Ok.  Getting another 960 would be a bad idea I just used that as an example because it has different VRAM variants.