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726757-B21 ✓ Verified by PartsTable
HP · MEMORY · RDIMM
WHAT YOU NEED TO KNOW
Memory is a hot market right now. DDR5 and DDR4 are extremely volatile with data centers driving availability to extreme lows. Always validate machine type and model. Remember: all RAM is Hynix, Samsung, or Micron underneath OEM labels — use that to find alternatives. Key checks: Check OEM alternatives — all RAM is Hynix/Samsung/Micron underneath. Double-check what you're quoting in volatile market.
HOT market — DDR5/DDR4 extremely volatile
PRODUCT OVERVIEW
HP H240AR 12GB 2-PORTS INT SMART HOST BUS ADAPTER

HP H240AR 12GB 2-PORTS INT SMART HOST BUS ADAPTER. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ RDIMM→ 726757-B21
SPECIFICATIONS
Part Number726757-B21
ManufacturerHP
Capacity12GB
COMPONENT DIAGRAM
ECC 12GB 2Rx4 PC4 — RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 12GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 726757-B21 MFR HP 12GB —
KEY FEATURES
•
12GB Capacity
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
749997-001Compatible
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
compatible
726759-001Compatible
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
compatible
749976-B21Compatible
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module FIO
compatible
787841-B21Compatible
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module for DL380z G9
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 4
726759-001SUBSTITUTE
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
HPE
749976-B21SUBSTITUTE
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
HPE
749997-001SUBSTITUTE
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
HPE
787841-B21SUBSTITUTE
HP SAS 12G H240ar 2-Port Int (SFF-8087) PCI-E-3.0x8 Module
HPE
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FREQUENTLY ASKED QUESTIONS
What is 726757-B21?
726757-B21 is a HP H240ar 12GB 2-Ports Int Smart Host Bus Adapter manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 726757-B21?
There are 4 known substitutes for 726757-B21: 749997-001, 726759-001, 749976-B21 and 1 more. Substitute compatibility should be verified for your specific system.
Is 726757-B21 still available?
726757-B21 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026