Apple Inc. introduced the original Xserve in May 2002. Apple classifies the Xserve as "a high-density, 1U rackmount server that was applauded for its value and versatility." The Xserve came with one or two PowerPC G4 processors running at 1.33 GHz. It had up to 4 IDE hard disk drives and an ATI video card. In March 2003 they introduced the Xserve Cluster nodes. These only have one hard drive and no video cards, or optical drives. Powered by the 64-bit PowerPC G5 processor the Xserve G5 is much faster than its predecessor and more suited for High Performance Computing (HPC) applications.