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500660-B21 — HP 4GB (1x4gb) 4Rx8 Pc3-8500r-7 DDR3-1066MHZ 1.5V

✓ Government record, cited
HP · MEMORY · RDIMM
PRODUCT OVERVIEW
HP 4GB (1x4GB) 4RX8 PC3-8500R-7 DDR3-1066MHZ 1.5V

500660-B21: HP 4GB (1x4gb) 4Rx8 Pc3-8500r-7 DDR3-1066MHZ 1.5V.

A Hewlett Packard equivalent 4GB Registered Quad Rank Low Power DIMM (PC3-8500R) from Hypertec. Key specifications include Rank: Dual Rank (2R), Speed: DDR4-2933, Voltage: 1.2V, Capacity: 32GB, Form Factor: RDIMM, Organization: x4. This part is cataloged in the U.S.

Government catalog under NSN 7025-01-582-9780, indicating validated use in U.S. government and defense logistics supply chains. 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→ 500660-B21
NSN: 7025-01-582-9780
FSC: 7025 — Information Technology Input/output and Storage Devices
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
RankDual Rank (2R)
SpeedDDR4-2933
Voltage1.2V
Capacity32GB
Form FactorRDIMM
Organizationx4
NSN7025-01-582-9780
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COMPONENT DIAGRAM
ECC 4GB 2Rx4 PC3 1066MHz RDIMM HP NOTCH ~133.35 mm DDR3 RDIMM | 4GB | 1066MHz | PC3 Notch position = DDR3 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR3 RDIMM PN 500660-B21 MFR HP 4GB 1066MHz
KEY FEATURES
•
DDR3 Interface
•
4GB Capacity
•
1066MHz Speed
•
DDR3 Memory
•
BODY WIDTH: 1.180 INCHES NOMINAL IN
•
BODY LENGTH: 5.250 INCHES NOMINAL IN
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
BODY WIDTH1.180 INCHES NOMINAL IN
BODY LENGTH5.250 INCHES NOMINAL IN
SPECIAL FEATURES4GB MEMORY; 1X4GB MODULES; DDR3 SDRAM; 1066MHZ MEMORY SPEED; 240 PIN DIMM; MEMORY STANDARD DDR3-1066/PC3-8500 GB
PART NAME ASSIGNED BY CONTROLLING AGENCYLOW POWER DRAM MEMORY KIT
OTHER ITEMS IN FSC 7025 — Information Technology Input/output and Storage Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
7025-00-001-2681 7025-00-001-5588 7025-00-001-6998 7025-00-001-6999 7025-00-001-7000 7025-00-001-7025 7025-00-001-7026 7025-00-001-7027
SUBSTITUTES & CROSS-REFERENCES 2
501535001SubstituteBROKER-VERIFIED
HP 4GB (1x4gb) 4Rx8 Pc3-8500r-7 DDR3-1066MHZ 1.5V
substitute
500204-061CompatiblePARTNER
HP 4Gb PC3L-8500R 1066Mhz ECC REG QR x8 CAS-7 LV DIMM - Intel
compatible
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
THIS PART SUBSTITUTES FOR 2
500204-061SUBSTITUTE
HP 4Gb PC3L-8500R 1066Mhz ECC REG QR x8 CAS-7 LV DIMM - Intel
HPE
501535-001SUBSTITUTE
HP 4Gb PC3L-8500R 1066Mhz ECC REG QR x8 CAS-7 LV DIMM - Intel
HPE
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FREQUENTLY ASKED QUESTIONS
What is 500660-B21?
500660-B21 is a HP 4GB (1x4gb) 4Rx8 Pc3-8500r-7 DDR3-1066MHZ 1.5V manufactured by HP. It is classified as a MEMORY (RDIMM).
What parts can replace 500660-B21?
There are 2 known substitutes for 500660-B21: 501535001, 500204-061. Substitute compatibility should be verified for your specific system.
What is the NSN for 500660-B21?
500660-B21 is cataloged in the U.S. Government catalog under NSN 7025-01-582-9780. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.