Rear View of PNNL's Olympus Supercomputer (image) DOE/Pacific Northwest National Laboratory Share Print E-Mail Caption A unique, energy-saving feature PNNL's Olympus supercomputer is its rear-door rack cooling system, which uses water to absorb the heat generated by the computer. Here, one of the rear-door cooling elements is pulled away from a rack for display. Credit Pacific Northwest National Laboratory Usage Restrictions Credit PNNL Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.