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PartsTable / MEMORY / 864708-591
864708-591 ✓ Verified by PartsTable
Micron · 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

The 864708-591 is a Micron industrial component. 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→ 864708-591
SPECIFICATIONS
Part Number864708-591
ManufacturerMicron
COMPONENT DIAGRAM
ECC — 2Rx4 PC4 — RDIMM Micro 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 864708-591 MFR Micron — —
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
850881-001Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
1XD86AACompatible
HP 32GB PC4-2666V-R ECC Reg Dr X4 Cas-19 Dimm - Intel - WS
compatible
1XD86ATCompatible
HP 32GB PC4-2666V-R ECC Reg Dr X4 Cas-19 Dimm - Intel - WS
compatible
815100-H21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
815100-K21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
815100-X21Compatible
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - G10
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 20
880841-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
882361-091SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
882448-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
L09276-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
L09286-850SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
L12129-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
L42293-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P00602-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P02892-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P04177-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P05590-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P05590-X21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P06185-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P13627-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P18445-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P26140-001SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
P28221-B21SUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
Q1V92ASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
Q2D32ASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
1XD86AASUBSTITUTE
HP 32Gb PC4-2666V-R ECC REG DR x4 CAS-19 DIMM - Intel - WS
HP
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FREQUENTLY ASKED QUESTIONS
What is 864708-591?
864708-591 is a 864708-591 manufactured by Micron. It is classified as a MEMORY (RDIMM).
What parts can replace 864708-591?
There are 12 known substitutes for 864708-591: 850881-001, 1XD86AA, 1XD86AT and 9 more. Substitute compatibility should be verified for your specific system.
Is 864708-591 still available?
864708-591 is currently Unknown.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026