Luca, HPC4 project leader, explains the features of Eni's green data center: HPC4 is a computational cluster, a lot of computers working together as a common computer. HPC4 is the fourth iteration of Eni's supercomputing system and quadruples the power of its predecessor. It can provide 15 million billion calculations per second. Every single computer has two sockets and two graphics accelerators. Meaning the machine is able to provide over 70 thousand computing processors and over three thousand graphics cards".