Supermicro RAID controller AOC-S3916L-H16IR-32DD-O w/ 4GB, 8GB Cache & PCIe4.016 int 12Gb/s ports, x8 Gen4, ROC - LP, 32HDDw/exp, RoHS Technical Specification Controller ( RAID ) - Memory Memory Technology: DDR4 SDRAM Installed Cache Memory Storage Capacity: 8 GB Memory Speed: 2666MHz(PC4-21300) Controller ( RAID ) - Controller Controller Form Factor: Plug-in Card Requires Expansion Slot Standard: PCI Express 4.0 x8 Provides Internal Drive Bay Dimension: Low Profile Provides Data Channel: SAS/SATA III Data Transfer Rate: 12 Gbps Number of Input-Output Channels: 16 Supports Number of Devices: 32 Supports RAID Level: Level 0 Level 1 Level 10 Level 5 Level 50 Level 6 Level 60 Certifications: RoHS Controller ( RAID ) - Environment Maximum Operating Ambient Temperature: 55 °C Controller ( RAID ) - Dimensions&Weight Depth (mm): 167.64 mm Height (mm): 68.83 mm Warranty and Logistic Warranty Warranty Products Returnable: Yes Warranty Term (month): 12 month(s) Warranty Validation Criteria: Serial Number Logistic Pack Weight Brutto (kg): 0.2 kg Pack Weight Netto (kg): 0 kg Pieces in pack: 1 Retail Packaging Net Weight Carton: 0 kg Retail Packaging Net Weight Plastic: 0 kg Packs in Box: 1 Package Type: Retail