IBM System X3550 M4 Server

Specification

Form Factor – 1U Rack
Hard Drive – Up to eight 2.5″ hot-swap SAS/SATA HDDs, or up to three 3.5″ hot-swap SAS/SATA HDDs, or up to three 3.5″ Simple Swap SATA HDDs
Maximum Internal Storage – Up to 14.4 TB with 1.8 TB 2.5″ SAS HDDs, or up to 8 TB with 1 TB 2.5″ NL SAS/SATA HDDs, or up to 12.8 TB with 1.6 TB 2.5″ SAS/SATA SSDs, or up to 18 TB with 6 TB 3.5″ NL SAS/SATA HDDs
Memory – Up to 24 DIMM sockets (12 DIMMs per processor). RDIMMs and LRDIMMs (Load Reduced DIMMs) are supported but memory types cannot be intermixed. Memory speed up to 1866 MHz
Processor – Up to two Intel Xeon processor E5-2600 v2 product family CPUs with 12 cores (up to 2.7 GHz) or ten cores (up to 3.0 GHz) or eight cores (up to 3.3 GHz) or six cores (up to 3.5 GHz) or four cores (up to 3.5 GHz)