IBM System x3550M5 Processor Up to two Intel Xeon processor E5-2600 v3 product family CPUs with 18 cores (upto 2.6 GHz). Two QPI links up to 9.6 GT/s each. Up to 45 MB L3 cache  / Up to 24 DDR3 DIMMs sockets (12 DIMMs per processors) with Up to 1.5TB (24x 364GB LRDIMMs) and up to 2133MHz memory speed / ECC / memory mirroring / Memory Sparing / Intel C612 Chipset / Up to 26x 2.5" hot-swap SAS HDDs or 14x 3.5" hot-swap SATA for max. 87.6TB / Support 512e Advanced Format HDD / ServeRAID M5210 or M1215 with up to 4GB Flash / Upto Nine PCIe 3.0 slot / Upto four PCIe 3.0 slots / Four Gigabit Ethernet ports with Broadcom BCM5719 chipset / optional Optical Drive for selected models / Three USB 3.0, two USB 2.0 and 1 internal USB port for hypervisor / Integrated Management Module 2 (IMM2) using Renesas SH7758 / VGA Matrox G200eR2 with 16MB memory support 1600x1200 resolution / 550W, 750W or 900w Hot-Swap Platinum and Titanium Power Supply (optional second RPS) / Rackmount 2U / Warranty 3years P/L O/S 24x7 / Standard Without Optical & Without Keyboard + Mouse