Yeah going caseless is really the way to go especially with multi gpu setups. Lots of heat to dissipate and the more airflow you can get them the better. I've actually been pretty surprised by the temps - as these cards are factory OC'd: 85 C, 83 C and 70 C. Also I highly recommend the Kingwin LZP-1000 PS - it's 80+ Platinum and running under full load with the 3 gpu's going it's only drawing 600W from the wall. It's very efficient for sure.