High Quality Content by WIKIPEDIA articles! QPACE (QCD Parallel Computing on the Cell Broadband Engine) is pursuing the development of a massive parallel, scalable supercomputer for applications in lattice quantum chromodynamics (QCD). The machine structure is a three-dimensional torus of identical processing nodes, based on IBM's PowerXCell 8i processors. These nodes are tightly coupled by an Xilinx Virtex-5-based FPGA, application-optimized network processor attached to the PowerXCell 8i processor.