Adaptec ASR-51645 512MB 20-Port Mini-SAS PCI-Express RAID Controller Card 2258600-R.
Model Number: ASR-51645
Adaptec Part Number: 2258600-R
Compatible Part Numbers: TCA-00296-07-C PCA-00296-07-C PCB-00296-01-C
Specifications:
Bus Compatibility: PCIe
PCIe Bus Width: x8
PCIe Bus Speed: 2.5 Gb/s
Phys (Unified Serial Ports): 20
Standard Cache: 512 MB DDR2
Connectors, Internal: 4 mini-SAS x4 (SFF-8087)
Connectors, External: 1 mini-SAS x4 (SFF-8088)
Maximum number of disk drives: 20 direct-attached (or up to 256 with expanders)
Enclosure Support: I2C and SGPIO