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726821-B21: HPE Smart Array P440/4GB FBWC 12Gb 1-port Int SAS Controller

HPE 726821-B21 RAID controller
HPERAID controllers

Also listed as: 749797-001, 726739-001, 726739-002 · made by Microchip

The HPE Smart Array P440/4GB FBWC is a standard PCIe 3.0 x8 enterprise 12Gb/s SAS RAID controller for HPE ProLiant Gen9 servers. Featuring 4GB of flash-backed write cache, it delivers high write throughput and data protection for storage-intensive server configurations and secondary drive cages.

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Specifications

Part number726821-B21
BrandHPE
Made byMicrochip
TypeRAID controllers
Other numbers749797-001, 726739-001, 726739-002
Statusend of sale
Host interfacePCIe 3.0 x8 standard height/low-profile slot
Storage interface12Gb/s SAS, 6Gb/s SATA
Internal ports8 internal SAS/SATA physical links across 1x Mini-SAS HD (SFF-8643) wide connector
Cache4GB Flash Backed Write Cache (FBWC)
Raid levelsRAID 0, RAID 1, RAID 1 ADM, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60
Mixed modeSimultaneous RAID and HBA mode operation supported

About the 726821-B21

726821-B21 is the HPE Smart Array P440/4GB FBWC 12Gb/s SAS PCIe controller, providing high-performance enterprise storage connectivity and write acceleration. Equipped with 4GB of flash-backed write cache, it enables low-latency caching and advanced hardware RAID protection across up to eight directly attached internal SAS or SATA drives.

Compatibility

Compatible with all HPE ProLiant Gen9 servers supporting PCIe storage controllers, including DL380 Gen9, DL360 Gen9, DL160 Gen9, DL180 Gen9, DL120 Gen9, DL60 Gen9, DL80 Gen9, DL560 Gen9, DL580 Gen9, ML350 Gen9, ML110 Gen9, ML150 Gen9, Apollo 4200 Gen9, and Synergy 480 Gen9.

How to identify a genuine unit

Low-profile PCIe 3.0 x8 add-in card with full-height or low-profile bracket. Features one internal Mini-SAS HD x8 connector and an attached 4GB FBWC module. Label shows option part number 726821-B21, spare part number 749797-001, and assembly part number 726739-001.

Buying used

Inspect the PCIe edge connector and surface components for signs of scratches or damaged traces. Ensure the 4GB cache module is firmly mounted with its retaining clip intact. Test in a host server and verify that firmware updates flash successfully and cache diagnostics show 100% operational status.

Reference prices (last 12 months, updated 2026-10-27)

Used: USD 45 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
ebay.comusedUSD 45Tested working HPE P440/4GB PCIe RAID controller2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Check compatibility with HPE

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 726821-B21.

Equivalent part numbers

FAQ

What is the difference between P440 and P440ar?

The P440 is a standard PCIe slot card with 4GB cache, whereas the P440ar is a mezzanine card fitting the dedicated Flexible Smart Array slot with 2GB cache.

Does P440 support SAS expanders?

Yes, it fully supports the HPE 12G SAS Expander card to drive up to 24 or more SFF internal drives from a single controller.

Buying or selling 726821-B21?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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