Apologies if this is a really stupid question but I'm a newbie and am just in the process of ordering / building my rig.

Can you mine multiple coins on each card (say 80% used for one coin and 20% on another)? If so, do they have to use the same algo?
And can you do the above for each card that you own? e.g. if I have 2 x 1080Ti's can I mine 6 different coins?

It's called hedging my bets ;-)