Owners Manual
Table Of Contents
- Dell Precision 7820 Tower Owner's Manual
- Chassis
- Working on your computer
- Removing and installing components
- Screw size list
- Recommended tools
- Power supply unit (PSU)
- Side cover
- Front bezel
- Hard Disk Drive bezel
- Hard disk drive assembly
- NVMe Flexbay
- Slim Optical Disk Drive
- Front input and output bezel
- 5.25 inch ODD bracket
- Front input and output panel
- Input and output panel bracket
- VROC module
- Intrusion switch
- Internal chassis speaker
- Air shroud
- Memory
- Graphical processing unit(GPU)
- Coin cell battery
- System fan
- Fan bracket
- PCIe holder
- Rear system fan
- Front system fan
- Processor heat sink module
- System board
- Technology and components
- System specifications
- System Setup
- Software
- Troubleshooting
- Contacting Dell
speeds and protocols to seamlessly work with any of the three types of storage devices. Tri-Mode support provides a non-
disruptive way to evolve existing data center infrastructure. By upgrading to a tri-mode controller, users can expand beyond
SAS/SATA and use NVMe without major changes to other system configurations. The MegaRAID Tri-Mode storage adapters
support both REFCLK and SRIS based NVMe x1, x2, and x4 devices.
Key Features:
● Tri-Mode SerDes Technology enables the operation of NVMe, SAS or SATA devices in a single drive bay, allowing for endless
design flexibility
● Supports 12, 6, and 3 Gb/s SAS and 6, 3 Gb/s SATA data transfer rates
● Up to 8 PCIe links. Each link supporting x4, x2, or x1 link widths, supporting 8.0 GT/s (PCIe Gen3) per lane
● SFF-9402 Compliant, Connector Pin-out
● SFF-8485 Compliant, SGPIO
● Fits into rack-mounted servers with low-profile form factor and side-mounted SAS connectors
● Support critical, high-bandwidth applications with PCIe 3.1 connectivity
● CacheVault flash back-up at power fail. Supports bad block management
● Balance protection and performance for critical applications with RAID levels 0, 1, 5, 6, 10, 50, and 60
Table 3. Features of MegaRAID 9440-8i and 9460-16i controller
9440-8i 9460-16i
Ports 8 internal 16 internal
Connectors 2 x SFF8643 4 x SFF8643 x4
Storage Interface Support
SATA: Eight x1
SAS: One x8, Two x4, Four x2, Eight x1
NVMe: Two x4, Four x2, Four x1
SATA: Sixteen x1
SAS: Two x8, Four x4, Eight x2, Sixteen
x1
NVMe: Four x4, Eight x2, Eight x1
Max Devices Per Controller
SAS/SATA: 64
NVMe: 4
SAS/SATA: 240
NVMe: 24
Cache Memory N/A 4 GB 2133 MHz DDR4 SDRAM
94 Technology and components