From what I've read in previous threads, the general consensus is that a PC will run with two different graphics cards, however... it probably won't work in SLI and each card needs to drive its own monitor.
So i'm guess on a multi-screen system (left = CAD Card and right = Gaming Card), if the CAD software is open on the left is will run better on the left than the right and visa-versa for the gaming software. I don't have enough experience with multi graphics cards system to ascertain if this is correct or not but my gut is telling me that this is not quite correct in relation to my use case. I won't be doing CAD and gaming at the same time and I would like to use both screen at the same time with the software stretched across two screens or one type of CAD software open on one and another CAD software open on the other.
Background:- Designing a new air gapped, full PC system with two main purposes; high end CAD including Simulation (Flow as well as others) and high end gaming.
Graphics Cards:- (both cards need to be connected at all times due to the system being sealed)
for CAD: a P5000 or possibly a P6000 (if I can justify that, to myself)
for Gaming: an RTX 2080 Ti
Screens:- Two 27" screens (or a single curved equivalent)[and maybe an A4 sized-ish screen in portrait].
Scenario:- Do some CAD, close the software, click a switch (physical or otherwise), the computer switches cards without rebooting, play some tetris (as if I would use an RTX 2080 Ti for just tetris lol)
My initial train of thought would be to have the screens plugged into both graphics cards at all times and some how control which graphics card is powered up. I'm hoping this can be done in software without powering down or maybe by adding a physical switch/relay etc between the PSU and the graphics cards; but i'm guessing the system will need to be powered down or else risk system death. However if I can keep the system powered up and use a physical switch without system damage... that would be ideal.
My other idea was to have both cards powered up at all times (a bit wasteful) and have the screens permanently connected to both cards via some kind of KVM switch (not sure if that's still a thing, I had one back in VGA days, worked a treat). Hopefully this would shift the PC's card choice. If that would work then I could probably automate that with some kind of AutoIt magic or something.
My third idea which is an option but I really really don't want to do, is design my case to have two systems inside and have a KVM switch to move between them. But this seems like a cop out to me. I'd rather try to get the single system to work than compromise.
I posted this on here because i'm looking for some guidance, thoughts, ideas, nuggets of truth from folk who have done this type of thing before and succeeded or failed. Both the cards are really quite expensive and any info which could assist the design would be much appreciated.
Your probably thinking "why don't you just use the RTX 2080 Ti for the CAD work"... I tried opening one of my smaller models on a sample machine at one of the CAD software re-sellers with an RTX 2080 Ti and is was clunky AF, properly unusable.