CPU Type : Intel Xeon Scalable Family Generation 2 processors (x2xx) ChipSet : Intel C621 CPU Socket : N/A CPU No : 2 RAM Support (max) : 128 GB RAM Slots : 16 RAM Type : HPE SmartMemory or DDR4 Load Reduced (LRDIMM), or Registered (RDIMM) HDD bays : up to two (2) small form factor (SFF) or 4 ultra form factor (uFF) hot plug drive bays Internal Storage (max) : Two drives bays for SFF HPE Smart Drives.  Capacities dependent on drive size selected. On board network : depending on Model Expansion slots : Two (2) I/O expansion mezzanine slots: x16 PCIe 3.0 Type A (supports Type A mezzanine cards), x16 PCIe 3.0 Type B (supports Type A and Type B mezzanine cards Internal Raid Controllers : HPE Smart Array P204i-b SR Gen10 (4 Internal Lanes/1GB Cache) 12G SAS Modular Controller 804367-B21, HPE Smart Array P408e-m SR Gen10 (8 External Lanes/2GB Cache) 12G SAS Mezzanine Controller 804381-B21, HPE FIO Enable Smart Array SW RAID 784308-B21, HPE Special Enablement Kits 873373-B21