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Green circuit board with black memory chips and gold edge connector

HPE

HP P64339-B21 32GB DDR5 4800MHz CL40 desktop RAM

SKU CH-AQWV-TS2K0 MPN P64339-B21

32GB DDR5 4800MHz CL40 unbuffered dual-rank DIMM at 1.20V with 288 pins

  • Total capacity32 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • 32 GB capacity supports demanding workloads with a single module
  • 4800 MHz DDR5 speed delivers high data throughput for servers
  • CL40 latency provides responsive memory access at this frequency
  • 20 V operation reduces power draw compared to previous DDR generations
  • 288-pin unbuffered DIMM fits standard desktop memory slots

32GB DDR5 4800MHz Server Module

This 32GB DDR5 module operates at 4800MHz with CL40 latency and 1.20V. It is an unbuffered, dual-rank 288-pin DIMM designed for server platforms that support DDR5-4800 memory. The single-module configuration provides a straightforward capacity upgrade for compatible systems.

Simple DIMM Installation

Installation follows the standard 288-pin DIMM procedure: align the notch, press firmly until the retention clips engage, and verify seating. The unbuffered design means no register timing complications arise during POST. The most common issue is a motherboard that does not officially support DDR5-4800 unbuffered modules, which can prevent boot or limit speed.

DDR5-4800 Platform Limits

The module runs at the JEDEC base data rate of 4800MT/s with PC5-38400 bandwidth. Real-world throughput depends on the memory controller, channel population and BIOS revision. Dual-rank organisation can improve bandwidth utilisation on supported platforms, but maximum stable frequency and rank-per-channel limits are dictated by the specific server board and processor combination.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $608.99
Pricier than about 89% of the 3,647 comparable items (median $90.99).
Total capacity 32 GB
Higher than about 70% of the 3,251 comparable items (median 16 GB).
Price per GB $19.03 per GB
Pricier than about 90% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameHPE
Total capacity32 GB
Performance
Rated speedDDR5 4800 (PC5 38400)
Size & build
Shipping weight0.05 kg
Package size170 × 69 × 15 mm

Questions about this item

How can I verify the module is running at 4800 MHz with CL40 after installation?

Enter the system BIOS or use a hardware-monitoring utility; the SPD should report DDR5-4800, PC5-38400 speed and CL40 latency at 1.20 V.

What ships in the box and what must I source separately?

The package contains one 32 GB 288-pin unbuffered DDR5 DIMM; no cables, brackets or additional modules are included.

Which capacity version should I choose for a dual-channel server board?

This SKU is a single 32 GB dual-rank module; add a second identical module to populate both channels.

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