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| Specifications: | |
| Category | Proliant Controller |
| Sub-Category | Smart Array |
| Generation | P840/4GB |
| Part Number | 761874-B21 |
| Products ID | 479718 |
| Manufacturer | HP |
| Product Type | Storage Controller (RAID) |
| Host Bus | PCI Express 3.0 x8 |
| Controller Interface Type | SATA 6Gb/s SAS 12Gb/s |
| Data Transfer Rate | 1.2GB/s |
| Buffer Size | 4GB |
| RAID Level | 0 1 1 ADM 10 10 ADM 5 50 6 60 |
| Supported Devices | Disk Array (RAID) |
| Channel Quantity | 16 |
| Form Factor | Plug-in Card |
| Internal Ports | Dual |