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Technical Data Sheet
PartsTable / MEMORY / 633542-001
633542-001 ✓ 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 1GB DDR3-1600 FLASH BACKED WRITE CACHE

HP 1GB DDR3-1600 FLASH BACKED WRITE CACHE. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-695-3940, 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→ 633542-001
NSN: 5998-01-695-3940
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number633542-001
ManufacturerHP
InterfaceDDR3
Capacity1GB
NSN5998-01-695-3940
COMPONENT DIAGRAM
ECC 1GB 2Rx4 PC3 — RDIMM HP NOTCH ~133.35 mm DDR3 RDIMM | 1GB | — | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 633542-001 MFR HP 1GB —
KEY FEATURES
•
DDR3 Interface
•
1GB Capacity
•
DDR3 Memory
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 (FLIS)
SPECIAL FEATURESNO BATTERY
PART NAME ASSIGNED BY CONTROLLING AGENCYFLASH BACKED WRITE CACHE MODULE
SPECIAL FEATURESNO BATTERY
PART NAME ASSIGNED BY CONTROLLING AGENCYFLASH BACKED WRITE CACHE MODULE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
631679-B21Compatible
HP Smart Array FBWC 1Gb Kit for P420 P421 includes FL Capacitor with 36in Cable
compatible
610674-001Compatible
HP Smart Array FBWC 1Gb Module for P420/P421
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
610674-001SUBSTITUTE
HP Smart Array FBWC 1Gb Module for P420/P421
HPE
631679-B21SUBSTITUTE
HP Smart Array FBWC 1Gb Module for P420/P421
HPE
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FREQUENTLY ASKED QUESTIONS
What is 633542-001?
633542-001 is a HP 1GB DDR3-1600 Flash Backed Write Cache manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 633542-001?
There are 2 known substitutes for 633542-001: 631679-B21, 610674-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 633542-001?
633542-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-695-3940. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026