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Technical Data Sheet

300678-B21 — Memory Specs & Substitutes

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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 high quality memory ensure customers data reliability & productivity <br>- HP advanced memory technologies increase fault tolerance for applications that require higher levels of availability <br> This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7050-01-517-3248, 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 300678-B21
NSN: 7050-01-517-3248
FSC: 7050
CAGE: 65685 — COMPAQ COMPUTER CORP. (USA)
SPECIFICATIONS
special_features512MB OF ADVANCED ECC PC2100 DDR SDRAM DIMM MEMORY KIT (2 X 256MB) MB
end_item_identificationAN/USQ-172(V)
component_type_and_quantity1 BOARD
NSN7050-01-517-3248
COMPONENT DIAGRAM
ECC 256MB 2Rx4 PC4 RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 256MB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 300678-B21 MFR HP 256MB —
KEY FEATURES
256MB Capacity
COMPONENT TYPE AND QUANTITY: 1 BOARD
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)
COMPONENT TYPE AND QUANTITY1 BOARD
END ITEM IDENTIFICATIONAN/USQ-172(V)
SPECIAL FEATURES512MB OF ADVANCED ECC PC2100 DDR SDRAM DIMM MEMORY KIT (2 X 256MB) MB
COMPONENT TYPE AND QUANTITY1 BOARD
END ITEM IDENTIFICATIONAN/USQ-172(V)
SPECIAL FEATURES512MB OF ADVANCED ECC PC2100 DDR SDRAM DIMM MEMORY KIT (2 X 256MB) MB
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
300699-001Interchangeable
Same NIIN cross-reference
interchangeable
261583-031Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMATSourcing: other
RELATED PARTS 6
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HP 4GB FULLY BUFFERED DIMM PC2-5300 2X2GB DDR2 MEMORY KIT
187419-B21
COMPAQ 1GB 1X1GB PC1600 ECC DIMM
128279-B21
COMPAQ 512MB 1X512MB PC133 ECC DIMM
313615-B21
COMPAQ 128MB 1X128MB PC100 ECC DIMM
376242-L21
HP 3.60GHZ CPU 1MB 800MHZ FSB SC (SL7PH)
376242-B21
HP 3.60GHZ CPU 1MB 800MHZ FSB SC (SL7PH)
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FREQUENTLY ASKED QUESTIONS
What is 300678-B21?
300678-B21 is a COMPAQ 256MB 1X256MB PC2100 ECC DIMM manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 300678-B21?
There are 2 known substitutes for 300678-B21: 300699-001, 261583-031. Substitute compatibility should be verified for your specific system.
What is the NSN for 300678-B21?
300678-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7050-01-517-3248. This indicates validated use in U.S. government and defense supply chains.
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