HP 627814-B21 32GB PC3L-10600R DDR3 ECC REG Server Memory

Name: HP 627814-B21 32GB PC3L-10600R DDR3 ECC REG Server Memory
Brand: HP
SKU: 627814-B21

Overview

The HP 627814-B21 compatible 32GB module is a DDR3 SDRAM RDIMM operating in the PC3L-10600R speed class — meaning low-voltage (1.35V) operation, registered/buffered signal architecture, and a bandwidth ceiling of approximately 10,600 MB/s per module (at 1333 MHz) or 8,500 MB/s (at 1066 MHz). The registered buffer is what makes high-density population viable: it isolates the memory controller from the electrical load of the DRAM chips, allowing servers to fill all DIMM slots across both processor sockets without signal integrity failures. ECC (Error Correcting Code) adds single-bit correction and double-bit detection — a non-negotiable feature for servers running databases, hypervisors, or any workload where silent data corruption would be catastrophic. At 32GB capacity, this is among the largest DDR3 RDIMM densities available, which minimizes the number of modules required to reach target RAM totals.

This module is purpose-built for extending the life and capacity of HP ProLiant Gen8 server platforms — DL380p, DL360p, ML350p, and similar systems built around Intel Xeon E5-2600 series processors. The target buyer is an IT administrator managing aging server infrastructure who needs to expand memory headroom for additional VMs, larger database buffer pools, or growing application memory requirements without the capital expenditure of a platform refresh. The DDR3 ecosystem is mature and end-of-life, meaning this is an optimization play within an existing infrastructure investment rather than a foundation for future scaling. For organizations running these platforms in production, 32GB RDIMMs at low-voltage represent the highest-density, most power-efficient upgrade path available within the platform's constraints. Verify iLO firmware version before installation, as some earlier firmware revisions require updates to properly enumerate high-density third-party DIMMs.

Specifications

Capacity

32GB

Memory Type

DDR3 SDRAM

Speed

PC3L-10600R (1333 MHz)

Voltage

1.35V (Low Voltage)

Error Correction

ECC Registered (Buffered)

Form Factor

240-pin DIMM

HP Part Number

627814-B21

Warranty

Lifetime

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Pros & Cons

👍 Pros

32GB per DIMM allows high-density memory population — fewer modules needed to reach target capacity, leaving slots available for future expansion.
Low-voltage PC3L specification operates at 1.35V, reducing per-DIMM power draw and thermal output compared to standard 1.5V DDR3 RDIMMs — meaningful in fully-populated 24-DIMM configurations.
ECC with registered buffer enables reliable operation in fully-populated server memory configurations where unbuffered modules would fail signal integrity requirements.
240-pin RDIMM form factor is the standard for Intel Xeon E5 generation platforms — broad compatibility across HP, Dell, IBM, and Supermicro servers of that era.
Lifetime warranty on a compatible module provides long-term replacement coverage for a component class that sees continuous uptime expectations.

👎 Cons

DDR3 is a legacy memory standard — DDR4 and DDR5 platforms have surpassed it in bandwidth and power efficiency, making this an end-of-life ecosystem investment with no upgrade path.
PC3L-10600R at 1066/1333 MHz is the lowest-bandwidth tier of DDR3 server memory; workloads that are memory-bandwidth-constrained (in-memory databases, analytics) will not benefit from this module vs. a faster PC3-12800R or PC3-14900R alternative.
As a compatible (non-OEM HP) module, some HP ProLiant servers will display a memory warning in iLO or during POST — functionally benign but potentially alarming for operations teams running automated health monitoring.
Single-module 32GB purchase requires careful channel population planning — mismatched channel loading on multi-socket servers reduces effective memory bandwidth.

Frequently Asked Questions

What servers is the HP 627814-B21 compatible with?

The HP part number 627814-B21 is associated with HP ProLiant Gen8 servers, including the DL380p, DL360p, DL560, and ML350p Gen8 platforms. Compatibility depends on the processor's memory controller — these servers use Intel Xeon E5-2600 series CPUs that support quad-channel DDR3 ECC Registered DIMMs at 1066/1333/1600 MHz. Always verify the server's QuickSpecs before installing.

What does PC3L-10600R mean, and how does the "L" affect compatibility?

PC3L-10600R breaks down as: PC3 = DDR3, L = low voltage (1.35V vs standard 1.5V), 10600 = 10,600 MB/s peak bandwidth (running at 1333 MHz), R = Registered (buffered). The low-voltage designation matters for compatibility — some older servers and memory controllers are not certified for 1.35V operation. However, most Gen8 HP ProLiant systems support both standard 1.5V and low-voltage 1.35V RDIMMs.

Why is this module listed as 1066 MHz when PC3L-10600R implies 1333 MHz?

This is a common spec sheet ambiguity. PC3-10600R runs at 1333 MHz and achieves 10,600 MB/s bandwidth. If the listing states 1066 MHz DDR3-1066/PC3-8500, that is a different speed bin. Verify which speed is actually being shipped — 1333 MHz and 1066 MHz RDIMMs are not performance-equivalent, with 1333 MHz delivering roughly 25% more bandwidth per module.

What does ECC Registered memory provide that unbuffered ECC or non-ECC cannot?

Registered (buffered) DIMMs include a register chip that re-drives command and address signals, allowing the memory controller to support more DIMMs per channel without signal integrity degradation. ECC adds single-bit error correction and double-bit error detection. Together, these allow server platforms to populate all DIMM slots with high-capacity modules — something unbuffered DIMMs cannot support at scale.

Does the lifetime warranty transfer if I buy this as a compatible third-party module?

The lifetime warranty covers the module itself from the reseller/manufacturer of the compatible module — it is not a Dell or HP original part warranty. In practice, this means the warranty covers defective hardware replacement, but it does not entitle you to HP OEM support for the server platform.