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159227-001 — Memory Specs & Substitutes

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COMPAQ · 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

<b>Memory 512MB ML 350/370/530</b><br>This 512 GB (1 x 512 GB module) SDRAM memory module is manufactured by Compaq. Clock speed is 133 MHz. Compaq is a Hewlett-Packard (HP) brand.

HP is a technology solutions provider to consumers, businesses and institutions globally. The company's offerings span IT infrastructure, personal computing and access devices, global services and imaging and printing. This part is cataloged in the Federal Logistics Information System under NSN 7025-01-484-7422, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
MEMORY→ RDIMM→ 159227-001
NSN: 7025-01-484-7422
FSC: 7025
CAGE: 65685 — COMPAQ COMPUTER CORP. (USA)
SPECIFICATIONS
general_characteristics_item_descriptionREGISTERED ECC SDRAM DIMM MEMORY OPTION KIT; 512 MEGABYTE; 133 MEGAHERTZ
NSN7025-01-484-7422
COMPONENT DIAGRAM
ECC 512MB 2Rx4 PC4 — RDIMM COMPA NOTCH ~133.35 mm DDR4 RDIMM | 512MB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 159227-001 MFR COMPAQ 512MB —
KEY FEATURES
•
512MB Capacity
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: REGISTERED ECC SDRAM DIMM MEMORY OPTION KIT; 512 MEGABYTE; 133 MEGAHERTZ
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
GENERAL CHARACTERISTICS ITEM DESCRIPTIONREGISTERED ECC SDRAM DIMM MEMORY OPTION KIT; 512 MEGABYTE; 133 MEGAHERTZ
GENERAL CHARACTERISTICS ITEM DESCRIPTIONREGISTERED ECC SDRAM DIMM MEMORY OPTION KIT; 512 MEGABYTE; 133 MEGAHERTZ
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
0749295Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
0475711Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
475711Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
836973Same_fscGOVERNMENT REGISTRY
same_fsc cross-reference
same_fsc
128279-B21InterchangeableGOVERNMENT REGISTRY
Compaq 512MB 1x512mb PC133 ECC Dimm
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMATSourcing: other
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FREQUENTLY ASKED QUESTIONS
What is 159227-001?
159227-001 is a COMPAQ 512MB 1X512MB PC133 ECC DIMM manufactured by COMPAQ. It is classified as a MEMORY (RDIMM).
What parts can replace 159227-001?
There are 5 known substitutes for 159227-001: 0749295, 0475711, 475711 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 159227-001?
159227-001 is cataloged in the Federal Logistics Information System under NSN 7025-01-484-7422. 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: October 2026