647899-B21 — Memory Specs & Substitutes

✓ 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: Double-check what you're quoting in volatile market.

HOT market — DDR5/DDR4 extremely volatile

PRODUCT OVERVIEW

HP 8GB 1X8GB PC3-12800R 1RX4 DIMM

HP 8GB 1X8GB PC3-12800R 1RX4 DIMM. Key specifications include Rank: Dual Rank (2R), Speed: DDR4-2666, Voltage: 1.2V, Capacity: 32GB, Form Factor: RDIMM, Organization: x4. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5998-01-623-0391, indicating validated use in U.S. government and defense logistics supply chains. 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→ 647899-B21

NSN: 5998-01-623-0391
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)

SPECIFICATIONS

Rank	Dual Rank (2R)
Speed	DDR4-2666
Voltage	1.2V
Capacity	32GB
Form Factor	RDIMM
Organization	x4
NSN	5998-01-623-0391

COMPONENT DIAGRAM

KEY FEATURES

•

8GB Capacity

TYPICAL APPLICATIONS

Server memory expansion for virtualization workloads
Database performance optimization (in-memory computing)
VDI and remote desktop session hosting
High-performance computing (HPC) clusters
Mail server and collaboration platform scaling
Application server tier expansion

TECHNICAL CHARACTERISTICS

OVERALL WIDTH	3.500 INCHES NOMINAL IN
OVERALL LENGTH	7.800 INCHES NOMINAL IN
END ITEM IDENTIFICATION	COMPUTER SERVER
SPECIAL FEATURES	MEMORY SIZE: 8GB GB
PART NAME ASSIGNED BY CONTROLLING AGENCY	RAM MODULE
OVERALL WIDTH	3.500 INCHES NOMINAL IN
OVERALL LENGTH	7.800 INCHES NOMINAL IN
END ITEM IDENTIFICATION	COMPUTER SERVER
SPECIAL FEATURES	MEMORY SIZE: 8GB GB
PART NAME ASSIGNED BY CONTROLLING AGENCY	RAM MODULE

VERIFIED SUBSTITUTES & CROSS-REFERENCES 11

10293243Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

SM-D-778022Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

DAA3383A504-105Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

DAA3383A499-107Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

DAA3383A512-105Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

10288424Same_fscGOVERNMENT REGISTRY

same_fsc cross-reference

same_fsc

LIFECYCLE

StatusACTIVEGOVERNMENT REGISTRY

AvailabilityOEM and secondary market

RoHS CompliantEAR99ESD SensitiveNot HAZMAT

THIS PART SUBSTITUTES FOR 3

647651-081SUBSTITUTE

HP 8Gb PC3-12800R 1600Mhz ECC REG SR x4 CAS-11 DIMM - Intel v1 - G8

HPE

647651-08MSUBSTITUTE

HP 8Gb PC3-12800R 1600Mhz ECC REG SR x4 CAS-11 DIMM - Intel v1 - G8

HPE

664691-001SUBSTITUTE

HP 8Gb PC3-12800R 1600Mhz ECC REG SR x4 CAS-11 DIMM - Intel v1 - G8

HPE

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Mass storage backplane - Has four SCA SCSI connectors for hot-swap drives - Mounts in the back of the hard drive cage

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FREQUENTLY ASKED QUESTIONS

What is 647899-B21?

647899-B21 is a HP 8GB 1x8gb Pc3-12800r 1Rx4 Dimm manufactured by HP. It is classified as a MEMORY (RDIMM).

What parts can replace 647899-B21?

There are 11 known substitutes for 647899-B21: 10293243, SM-D-778022, DAA3383A504-105 and 8 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 647899-B21?

647899-B21 is cataloged in the Federal Logistics Information System under NSN 5998-01-623-0391. This indicates validated use in U.S. government and defense supply chains.

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647899-B21 — Memory Specs & Substitutes

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