Hi sorry for the delayed response,
I didn’t go with the 690’s in the end, they were so hard to get hold of I ended up getting 4x EVGA 680 4GB’s. having some issues with them, if i have 1,2 or 3 in my Cubix Resolve runs fine, if i have 4, I get picture out of HDSDI but a white viewer on the computer monitor and if I import into media pool resolve crashes. also RedCine X Pro crashes instantly if i have 4 cards in but its fine with 1,2 or 3. Can’t seem to find the problem! Im on the correct version of cuda as far as i know!