LENOVO The IBM 7915 System x3650 M4 Express Model EFU has a E5-2609 v2 (4C) 2.5 GHz processor, 10 MB cache, 8 GB memory, 6.4 GT/s, SAS/SATA HDD interface, 2.5-inch HDD, Open bay, M5110e, 1 x 550W power supply, Multiburner, and U.S. English language support.