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PR788AV — Memory Specs & Substitutes

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HP · DIMM
WHAT YOU NEED TO KNOW
2Rx4 = Dual Rank ×4 chip width (standard server) RDIMM = Registered (servers) | LRDIMM = Load-Reduced (max density)
DDR3 ≠ DDR4 ≠ DDR5 — physically incompatible (notch position)
PRODUCT OVERVIEW

HP 2GB DDR-400 memory module 4 x 0.5 GB 240-pin DIMM ECC. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
PR788AV
SPECIFICATIONS
Part NumberPR788AV
ManufacturerHP
Capacity2GB
COMPONENT DIAGRAM
ECC 2GB 2Rx4 PC4 — RDIMM HP NOTCH ~133.35 mm DDR4 RDIMM | 2GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN PR788AV MFR HP 2GB —
KEY FEATURES
•
2GB 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
376638-B21Compatible
HP 1Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (2x512Mb) SDRAM Memory Kit - AMD
compatible
PP639AVCompatible
HP 1Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (2x512Mb) SDRAM Memory Kit - AMD for xw9300
compatible
PP641AVCompatible
HP 2Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (4x512Mb) SDRAM Memory Kit - AMD for xw9300
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
PP639AVSUBSTITUTE
HP 2Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (4x512Mb) SDRAM Memory Kit - AMD for xw9300
HPE
PP641AVSUBSTITUTE
HP 2Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (4x512Mb) SDRAM Memory Kit - AMD for xw9300
HPE
376638-B21SUBSTITUTE
HP 2Gb PC2-3200R 400Mhz ECC REG CL3 240-Pin (4x512Mb) SDRAM Memory Kit - AMD for xw9300
HPE
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FREQUENTLY ASKED QUESTIONS
What is PR788AV?
PR788AV is a HP 2GB DDR-400 memory module 4 x 0.5 GB 240-pin DIMM ECC manufactured by HP.
What parts can replace PR788AV?
There are 3 known substitutes for PR788AV: 376638-B21, PP639AV, PP641AV. Substitute compatibility should be verified for your specific system.
Is PR788AV still available?
PR788AV 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: August 2026