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442821-B21 — HP 1GB (2 x 512MB) FBD PC2-5300 memory module 2 x 0.5 GB DDR2 240-pin DIMM ECC

HPE · DIMM
PRODUCT OVERVIEW

442821-B21: HP 1GB (2 x 512MB) FBD PC2-5300 memory module 2 x 0.5 GB DDR2 240-pin DIMM ECC.

HP 1GB (2 x 512MB) FBD PC2-5300 memory module 2 x 0.5 GB DDR2 240-pin DIMM ECC. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

SPECIFICATIONS
Part Number442821-B21
ManufacturerHPE
Capacity1GB
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COMPONENT DIAGRAM
ECC 1GB 2Rx4 PC4 — RDIMM HPE 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 442821-B21 MFR HPE 1GB —
KEY FEATURES
•
1GB 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
SUBSTITUTES & CROSS-REFERENCES 2
397409-B21CompatiblePARTNER
HP 1Gb PC2-5300F 667Mhz ECC FBD SR x8 CL5 240-Pin (2x512Mb) Memory Kit - Intel
compatible
AG922AVCompatiblePARTNER
HP 1Gb PC2-5300F 667Mhz ECC FBD SR x8 CL5 240-Pin (2x512Mb) Memory Kit - Intel for xw6400/6600/xw8400/8600
compatible
LIFECYCLE

No lifecycle data available.

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FREQUENTLY ASKED QUESTIONS
What is 442821-B21?
442821-B21 is a HP 1GB (2 x 512MB) FBD PC2-5300 memory module 2 x 0.5 GB DDR2 240-pin DIMM ECC manufactured by HPE.
What parts can replace 442821-B21?
There are 2 known substitutes for 442821-B21: 397409-B21, AG922AV. Substitute compatibility should be verified for your specific system.
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PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.