Running 2 different video cards in one system

[MAXBattle]

Back in the olden days, you could run two different video cards (not SLI or Crossfire) and have each one running a monitor. And, of course, there are apparently still vestiges of CrossfireX available, but the cards have to be from the same generation.

 

Is there any benefit to running two different cards in the same system today? (other than to run 6 monitors) 

 

What I was ideally thinking was to have my RX590 8GB running my two displays and my new RX6750XT 12GB doing nothing but crunching for things like Premiere and AfterEffects.  Is that in any way possible?  Mobo is ASUS TUF X570-PLUS with Ryzen 5 3600 and Widows 11.

[jaslion]

12 minutes ago, MAXBattle said:

Is that in any way possible?

Possible? Yes but for your usecase you will gain exactly nothing but increase power consumption and most likely even a buggy premiere gpu select that suddenly starts using the 580 for no reason.

[MAXBattle]

5 minutes ago, jaslion said:

Possible? Yes but for your usecase you will gain exactly nothing but increase power consumption and most likely even a buggy premiere gpu select that suddenly starts using the 580 for no reason.

[heavy sigh] oh, well...

 

You'd think that having a dedicated, separate processor would be clean.  I was hoping it'd be like the old 8087 math coprocessors we used to put in 8086 machines. It'd just reroute the workload.