HP DL160 G6 Server MotherBoard supports quad-core Processors.  HP DL160 G6 server  Motherboard is a high-performance, low-cost, ultra-dense, dual processor capable, 1U rack server for memory intense High-Performance Computing (HPC) environments, Web 2.0, hosting, and general large memory footprint server deployments. If a single Processor is installed, then use socket 1. When two processors are used, the server supports boot functions through the processor installed in socket 1. However, if processor 1 fails, the system cannot boot up, and if Removal and replacement procedures 65 processor 2 fails, the system will be automatically booted from processor 1 and provide a processor failure message. The processor socket supports a 2P Intel Xeon processor and a 2P Intel Westmere processor with an integrated memory controller.