The MERCED cluster (Multi-Environment Research Computer for Exploration and Discovery) is a shared resource for UC Merced researchers, performing calculations such as electronic, optical, and mechanical simulations of materials. This Linux cluster from Advanced Clustering Technologies was funded by an NSF Major Research Instrumentation grant. There are 76 compute nodes with a total of 1892 cores at 2301 MHz, plus 6 GPU nodes, running nVidia K20 graphics cards. Total capacity is 38 TFLOPS. The machine is connected to UC Merced’s Science DMZ network and the Pacific Research Platform for 10-100 Gbps connection to other research universities.