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377726-888 ✓ Verified by PartsTable
HP · MEMORY · UDIMM
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 1RX8 PC2-5300U DDR2 666MHZ UDIMM MEMORY

HP 1GB 1RX8 PC2-5300U DDR2 666MHZ UDIMM MEMORY. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MEMORY→ UDIMM→ 377726-888
SPECIFICATIONS
Part Number377726-888
ManufacturerHP
Capacity1GB
COMPONENT DIAGRAM
ECC 1GB 2Rx4 PC4 — UDIMM HP NOTCH ~133.35 mm DDR4 UDIMM | 1GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 UDIMM PN 377726-888 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 7
PX976AACompatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin (1x1Gb) Memory Kit for Desktops
compatible
398038-001Compatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
compatible
377726-288Compatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
compatible
377726-885Compatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
compatible
5188-1017Compatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
compatible
EK478-69001Compatible
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 7
EK478-69001SUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
PX976AASUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
PX976ATSUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
377726-288SUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
377726-885SUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
398038-001SUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
5188-1017SUBSTITUTE
HP 1Gb PC2-5300U 667Mhz Non-ECC UB SR x8 CL5 240-Pin DIMM
HP
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FREQUENTLY ASKED QUESTIONS
What is 377726-888?
377726-888 is a HP 1GB 1Rx8 Pc2-5300U Ddr2 666MHZ UDIMM Memory manufactured by HP. It is classified as a MEMORY (UDIMM).
What parts can replace 377726-888?
There are 7 known substitutes for 377726-888: PX976AA, 398038-001, 377726-288 and 4 more. Substitute compatibility should be verified for your specific system.
Is 377726-888 still available?
377726-888 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026