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Dell PERC H840 12G SAS External RAID Card 645NJ w/ Low Profile and Full Height Bracket


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Brand Dell
Model PERC H840
Part Number 645NJ
Device Type External RAID Controller - plug-in card
Form Factor 8-lane, PCI Express 3.1 compliant
Bracket Profile Low Profile / High Profile
Interface  3Gb/s, 6Gb/s & 12Gb/s SAS SSD support
SED drive support
Physical ports Two mini-SAS HD external SFF8644
NV Cache 8GB battery-backed write cache 
Raid Levels RAID levels 0, 1, 5, and 6
RAID spans 10, 50, and 60
Non-RAID (JBOD mode)
Solution provided Eight-port (2- x4 connectors) external SAS
solution for performance-hungry external storage
Key features OCE, RLM, 4K/ UNMAP/ S.M.A.R.T. support
Global and dedicated hot-spare with Revertible Hot-Spare
SAS controller LSI SAS 3508
RAID management CTRL-R, Dell OpenManage Storage, PERC CLI
Additional management: UEFI (HII), CEM
Compatibility 14th / 15th Gen Dell Servers
Cables None included 
Item Condition Used, open box
Qty 1


The Dell EMC PowerEdge RAID Controller (PERC) H840 is an eight-port (2-x4 connectors) external 12Gb/s SAS solution for performance-hungry external storage environments supporting up to 192 SAS hard-disk drives or solid-state drives.

As storage demands expand and processing loads grow, it becomes increasingly more difficult for administrators to achieve maximum performance and scale from their applications. The newest line of Dell EMC PERC cards, built on the LSI 3508 dual-core ARM A15 RAID-On-Chip (ROC), offer unmatched I/O performance for database applications and streaming digital media environments.

The PERC H840, with eight external ports (2- x4 connectors), delivers two high performance ARM A15 processor cores and integrates a 72-bit, DDR4-2133 DRAM interface that drives 4GB non-volatile cache memory. This controller is ideal for configuring external storage enclosures that drives high-performance SAS hard drives and application-accelerating solid state drives. The PERC H840 exploits the potential of 12Gb/s SAS SSDs for unsurpassed performance and enterprise-class reliability.

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  • 12-Month Return to Base Warranty

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