Akasa Revo How very strange indeed. It's a very small refrigerant filled loop of radiator/fan and cooling block. No pump as such, the coolant shifts the heat without requiring one, probably some unusual effect being abused to do so. Under the name of a "bubble pump". Coolant vaporising at the block being harnessed to drive the fluid round the loop and radiator? Anyway it's not a hardcore cooling solution, intended for under 90w TDP but definitely interesting. More so than yet another tower cooler that looks uncannily like the last one.