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The SIMES cluster was a mid-range computing platform. It consisted initially of 64, dual Quad-core Dell 1950 PowerEdge nodes with a 100 GigaBit Ethernet interconnect and 16 GB of RAM per node and a theoretical maximum-peak-performance of ~ 5TFlops. It was upgraded to include an additional 48, 12 core Dell C6100 PowerEdge nodes with 48 GB of RAM per node and the entire system used an InfiniBand interconnect. The computational resources also included a GPU test cluster with NVIDIA Fermi GPU cards. The SIMES cluster facilitated simulations of ARPES spectra in strongly correlated materials modeled by the single- and multi-band Hubbard and Hubbard-Holstein Hamiltonians using quantum Monte Carlo (QMC) techniques and massively parallel computer codes; the SIMES cluster also facilitated modest sized simulations of RIXS spectra in strongly correlated materials modeled using multi-orbital Hubbard Hamiltonians solved by exact diagonalization (ED) techniques with SMP as well as massively parallel computer codes. The principle use of the cluster was for code development and small scale production.