Are 3 or 4 Graphics Cards even still supported?

[Duranson]

I'm not actually planning on doing this, more just curious though. I know that SLI only supports up to 2 graphics cards, but can applications like video editing or CAD actually utilize more than 2 GPUs?

[Oshino Shinobu]

Yes. No additional driver support is required for that use case generally. It's SLI/CrossFire that's mostly been abandoned, but not multi-GPU for productivity based workloads. 

[Duranson]

1 hour ago, Oshino Shinobu said:

Yes. No additional driver support is required for that use case generally. It's SLI/CrossFire that's mostly been abandoned, but not multi-GPU for productivity based workloads. 

So could someone technically get 4 GPUs, run 2 in SLI when playing games that support it, and then when doing multi-GPU productivity based workloads they could utilize all 3 or 4?

[Oshino Shinobu]

8 hours ago, Duranson said:

So could someone technically get 4 GPUs, run 2 in SLI when playing games that support it, and then when doing multi-GPU productivity based workloads they could utilize all 3 or 4?

Yes