SK hates my video card

There is a BIG problem with this game (SK Beta 5.2 opt-in) and my video card. 

I've been playing Fallen Enchantress waiting for the latest BETA (to keep me busy).  Because it's heavily modded, I never bother to report bugs for FE.  But here is what happens:

I'm playing and suddenly the screen just goes blank (I would say twice an hour or so on average).  I wait awhile and it goes to my desktop, and then SOMETIMES it comes back to the game.  When it doesn't I get a DX something error.  Then the game crashes and on my desktop I get an error message from my video card (telling me something bad happened). I've just learned to live with it.

BUT - I just started playing SK as soon as the latest beta came out and guess what - it happened again (and again, and again).  Exactly same sequence.  Mostly during tactical combat - and sometimes (but not exclusively) when I'm selecting a group of squares for a spell or area arrow target.

It's something with the way the software interacts with my video card.

My PC:

Win 8.1 pro

16 gig ram

i5 4690K

GTX 970 ("4 Gig"). Latest drivers of course.

Thought you guys should know - especially because this is something both games do.

Mozo