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PartsTable / MEMORY / A9781930
A9781930 ✓ Verified by PartsTable
EMC · MEMORY · LRDIMM
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
DELL 64GB (1x64GB) 4RX4 PC4-21300V-L DDR4-2666MHZ LRDIMM

DELL 64GB (1x64GB) 4RX4 PC4-21300V-L DDR4-2666MHZ LRDIMM. Key specifications include ECC: Yes, Component for: PC/Server, Memory voltage: 1.2 V, Product colour: Black, Green, Internal memory: 64 GB, Chips organisation: 4Rx4. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ LRDIMM→ A9781930
SPECIFICATIONS
ECCYes
Component forPC/Server
Memory ranking4
Memory voltage1.2 V
Product colourBlack, Green
Internal memory64 GB
Chips organisation4Rx4
Memory clock speed2666 MHz
Memory form factor288-pin DIMM
Internal memory typeDDR4
Harmonized System (HS) code84733020
COMPONENT DIAGRAM
ECC — 2Rx4 PC4 — RDIMM EMC NOTCH ~133.35 mm DDR4 RDIMM | — | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN A9781930 MFR EMC — —
KEY FEATURES
•
Up to 64 GB
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
SNP4JMGMC/64GCompatible
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - MPN
compatible
370-ADNHCompatible
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - SPN
compatible
370-AETBCompatible
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - SPN
compatible
4JMGMCompatible
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - APN
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 4
SNP4JMGMC/64GSUBSTITUTE
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - DPN
DELL
370-ADNHSUBSTITUTE
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - DPN
DELL
370-AETBSUBSTITUTE
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - DPN
DELL
4JMGMSUBSTITUTE
Dell 64Gb PC4-2666V-L Load Reduced QR x4 CAS-19 DIMM - DPN
DELL
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FREQUENTLY ASKED QUESTIONS
What is A9781930?
A9781930 is a A9781930 manufactured by EMC. It is classified as a MEMORY (LRDIMM).
What parts can replace A9781930?
There are 4 known substitutes for A9781930: SNP4JMGMC/64G, 370-ADNH, 370-AETB and 1 more. Substitute compatibility should be verified for your specific system.
Is A9781930 still available?
A9781930 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026