Dell PowerEdge R420 4 x 3.5 Hot Plug E5-2407 Quad Core 2.2Ghz 48GB 4x 2TB SAS H710 2x 550W Rack Height: 1U Redundant Hot-swap Power: Yes MAX Processors: 2 Chipset: Intel C600 Memory Features: 12 DIMM slots, 6 per processor. (2GB/4GB/8GB/16GB/32GB DDR3 up to 1600MT/s, actual memory speed dependent on the processor capability) Number of Memory Slots: 24 Storage Controller: Dell Perc H710 Controller HDD Interface: SAS