The triple slot version started to be audible around 40% for me while the 2slot version (670) starts to be audible around 65% but have to agree the extra slot is kinda pointless. As you can see in this picture they could have easily made a 2slot card of it instead of using so large plastic things where the fans are attached to. Something else which is fail is that 2 heatpipes are not even touching the gpu die >.< MSI's heatsink design is just so much better but I hate their fans. But still the 3slot cards they look awesome in SLI especially on a rampage iv extreme :P