Ive been running windows 10 pro 64bit for a while but was running 14.4 drivers and i could use all 3 GPU's with no problems. I decided after being prompted for ages to update and now I've done so my pc can only see 2 of my R9 290's. I've update windows and checked the AMD drivers are up to date and waited a few weeks for updates but still no change. I can disable the cards on the motherboard via switches but i cannot move the cards around as they use a shared waterblock. The pc hasn't been moved in months so i doubt the card has been dislodged as they are bolted together to form a water tight seal. Can anyone offer any advice?