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Technical Data Sheet

187419-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

Memory is one of the most critical components in your server, and one of the easiest to upgrade to quickly enhance and improve overall system performance.The dependence on industry standard servers to run memory-intensive applications is pushing the memory capacity of servers to new levels. For server applications, memory modules and other server components must withstand almost non-stop exposure to elements such as heat and electricity. The slightest defect can become a problem resulting in server crashes and data loss for multiple users.

As server memory capacities increase, so does the likelihood of memory errors that can corrupt data and cause servers to crash. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5962-01-542-7931, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MEMORY RDIMM 187419-B21
NSN: 5962-01-542-7931
FSC: 5962
CAGE: 65685 — COMPAQ COMPUTER CORP. (USA)
SPECIFICATIONS
memory_capacity2 X 512 MB MB
memory_device_typeRAM
end_item_identificationSERVER, ML570R
terminal_type_and_quantity184 PIN
part_name_assigned_by_controlling_agencySDRAM, PC1600, 1GB GB
NSN5962-01-542-7931
COMPONENT DIAGRAM
ECC 1GB 2Rx4 PC4 RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 1GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 187419-B21 MFR HP 1GB —
KEY FEATURES
1GB Capacity
MEMORY CAPACITY: 2 X 512 MB MB
TERMINAL TYPE AND QUANTITY: 184 PIN
MEMORY DEVICE TYPE: RAM
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)
MEMORY CAPACITY2 X 512 MB MB
END ITEM IDENTIFICATIONSERVER, ML570R
TERMINAL TYPE AND QUANTITY184 PIN
PART NAME ASSIGNED BY CONTROLLING AGENCYSDRAM, PC1600, 1GB GB
MEMORY DEVICE TYPERAM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
500-1249739Interchangeable
Same NIIN cross-reference
interchangeable
249676-001Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
RELATED PARTS 6
397413R-B21
HP 4GB FULLY BUFFERED DIMM PC2-5300 2X2GB DDR2 MEMORY KIT
300678-B21
COMPAQ 256MB 1X256MB PC2100 ECC DIMM
128279-B21
COMPAQ 512MB 1X512MB PC133 ECC DIMM
313615-B21
COMPAQ 128MB 1X128MB PC100 ECC DIMM
311584-B21
MICROCIRCUIT,DIGITAL
187420-B21
MICROCIRCUIT,MEMORY
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FREQUENTLY ASKED QUESTIONS
What is 187419-B21?
187419-B21 is a COMPAQ 1GB 1X1GB PC1600 ECC DIMM manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 187419-B21?
There are 2 known substitutes for 187419-B21: 500-1249739, 249676-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 187419-B21?
187419-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5962-01-542-7931. This indicates validated use in U.S. government and defense supply chains.
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