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445166051 — 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 1GB, 800MHz, PC2-6400, DDR-2 ECC SDRAM

HP 1GB, 800MHz, PC2-6400, DDR-2 ECC SDRAM. 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→ 445166051
SPECIFICATIONS
Part Number445166051
ManufacturerHP
Capacity1GB
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 445166051 MFR HP 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
450259-B21Compatible
HP 1Gb PC2-6400E 800Mhz ECC UB DR x8 CL6 240-Pin (1x1Gb) Memory Kit - Intel
compatible
459932-001Compatible
HP 1Gb PC2-6400E 800Mhz ECC UB DR x8 CL6 240-Pin DIMM - Intel
compatible
M391T2953GZ3CF7Primary
Samsung 1GB, 800MHz, PC2-6400, DDR-2 ECC SDRAM
primary
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
450259-B21SUBSTITUTE
HP 1Gb PC2-6400E 800Mhz ECC UB DR x8 CL6 240-Pin DIMM - Intel
HPE
459932-001SUBSTITUTE
HP 1Gb PC2-6400E 800Mhz ECC UB DR x8 CL6 240-Pin DIMM - Intel
HPE
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FREQUENTLY ASKED QUESTIONS
What is 445166051?
445166051 is a HP 1GB, 800MHZ, Pc2-6400, Ddr-2 ECC Sdram manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 445166051?
There are 3 known substitutes for 445166051: 450259-B21, 459932-001, M391T2953GZ3CF7. Substitute compatibility should be verified for your specific system.
Is 445166051 still available?
445166051 is currently Unknown.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: September 2026