Do Crossfire need same GPU

[airborne spoon]

I have an Asus RX 5700XT ROG Strix and im thinking in a few months if prices drop i'll buy another card. The smaller 2 fan cards like the MSI RX 5700 XT MECH OC are cheaper but still have the same specs, and the waterblock is like $30 cheaper too.

Could i run those in Crossfire or do they need to be the Exact same model card not just the same primary model?

[Mateyyy]

The 5700XT does not support Crossfire.

[airborne spoon]

2 minutes ago, Mateyyy said:

The 5700XT does not support Crossfire.

So would a second card do nothing?

Like didnt Nvidia stop the SLI thing but there is still performance gains with a second card.

[Eigenvektor]

It would only work for DX12/Vulkan games that support explicit multi-GPU, which is basically zero.

Just now, airborne spoon said:

So would a second card do nothing?

Like didnt Nvidia stop the SLI thing but there is still performance gains with a second card.

No, there's no performance gain from a second GPU unless you have something like Crossfire/SLI support or explicit multi-GPU.

[Windows7ge]

I think "Back in the day" you could CFX cards like the Radeon HD7970 with its little sister the HD7950. Certain other combinations may be possible in the R7/R9 series but with the latest GPUs CFX/SLI has turns into a dying practice.

 

However, if you have a compute application based load like rendering, transcoding, or other highly parallel workloads like BOINC, or F@H that doesn't mean you can't utilise more than one card.

 

[airborne spoon]

1 minute ago, Windows7ge said:

However, if you have a compute application based load like rendering, transcoding, or other highly parallel workloads like BOINC, or F@H that doesn't mean you can't utilise more than one card.

 

So basically besides F@H and mining, multi GPU serves no purpose for games and benchmarks? Also my 5700XT is putting out 1.6 million points daily on F@H but i haven't OC it yet.

[Windows7ge]

3 minutes ago, airborne spoon said:

So basically besides F@H and mining, multi GPU serves no purpose for games and benchmarks? Also my 5700XT is putting out 1.6 million points daily on F@H but i haven't OC it yet.

Workloads such as rendering, video editing, 3D acceleration, etc can take advantage of it too.

 

In the very high-end NVIDIA does have a smidgen of something resembling SLI left but it's really not meant for gaming. Mainly workstation and compute use cases. I haven't heard for sure if AMD still allows CFX at all with their latest 5700XT cards.

[Eigenvektor]

10 minutes ago, airborne spoon said:

So basically besides F@H and mining, multi GPU serves no purpose for games and benchmarks? Also my 5700XT is putting out 1.6 million points daily on F@H but i haven't OC it yet.

It does have a benefit in games (and benchmarks) that do support it, it's just that the number of modern titles that bother to implement support for Cfx/SLI is getting smaller. And even if it is supported, it's not always without issues.

 

One example: Does DOOM Eternal support Crossfire for AMD or SLI for NVIDIA GPUs?

Quote

DOOM Eternal does not support Crossfire for AMD or SLI for NVIDIA GPUs.  If you play the game with Crossfire or SLI enabled, you will experience performance issues or even crash.  If you have dual GPUs on your PC, plug both monitors into the primary GPU before you play DOOM Eternal.