HPE 809208-B21 PC4-19200 DDR4-2400MHz Memory

HPE 809208-B21 DDR4-2400 PC4-19200 Load Reduced Memory Kit (128GB)

The HPE 809208-B21 is a DDR4-2400 (PC4-19200) memory kit containing one 128GB load reduced DIMM. It is an octal rank x4 module with CAS latency 20, ECC and 1.2V operation, made for HPE ProLiant Gen9 servers that need the largest memory footprint per slot.

A single 128GB module is aimed at memory-hungry systems: large virtualisation hosts, SAP HANA style in-memory databases and analytics servers. Where a server would otherwise need every slot filled with smaller DIMMs, these kits reach high totals while leaving room to grow.

The kit is offered by Euroland IT Store in both New and Refurbished condition, according to what is currently in stock.

HPE 809208-B21 Technical Specifications

What Is The HPE 809208-B21?

809208-B21 is the HPE option kit number, the code used when the module is sold as an upgrade. The same 128GB LRDIMM is supported under spare part 819415-001, and its assembly code is 809086-091. Any of those three numbers leads to the same module.

The product title on this page gives the speed but not the size, so it is worth stating clearly: 809208-B21 is the 128GB module in HPE’s DDR4-2400 Gen9 range. It should not be confused with the 32GB or 64GB DDR4-2400 kits, which carry different numbers.

Octal Rank Memory And What It Costs In Latency

Eight ranks on one DIMM is a lot of DRAM for a memory channel to drive. The load reduced design is what makes it possible. A data buffer on the module presents a single, light load to the processor, hiding most of the electrical complexity behind it.

There is a price for that capacity. CAS latency is 20, compared with 17 on smaller DDR4-2400 modules, and the buffer adds a little more delay. For applications limited by how much data fits in memory, that cost is small next to the benefit of avoiding disk or network access. For latency-sensitive trading or high frequency workloads, smaller RDIMMs may suit better.

Population Rules For 128GB LRDIMMs

Only load reduced memory can sit alongside this module; registered DIMMs must be removed. HPE also recommends using the same capacity and rank layout across a channel. Mixing 128GB and 32GB LRDIMMs in one channel can work on some platforms but limits speed and makes troubleshooting harder. The simplest path is to fill channels with identical kits in equal numbers per processor.

New HPE 809208-B21

New kits are the usual choice for large planned memory builds, where several identical modules go into a host at once and you want them all unused. Warranty information for new stock is on the product page.

Refurbished HPE 809208-B21

With 128GB modules carrying a high list price, Refurbished stock can make a significant difference to the cost of a Gen9 upgrade. It also suits replacement of a single failed module. Check the product page for refurbished condition and warranty.

Supported Servers

• HPE ProLiant DL360 Gen9
• HPE ProLiant DL380 Gen9
• HPE ProLiant ML350 Gen9

These servers need Xeon E5-2600 v4 processors for DDR4-2400 memory. Confirm your processor generation, check that the server already uses LRDIMMs or is empty of RDIMMs, and read an existing module label if you are replacing one.

Related Memory Options

819415-001 is the spare number and 809086-091 the assembly number for this 128GB module. If you need less capacity per slot, the store lists the HPE 805358-B21 64GB DDR4-2400T kit and the HPE 819413-001 64GB DDR4-2400T module. Smaller DDR4-2400 parts include the HPE 809082-091 16GB module, the HPE 819411-001 16GB module and the HPE 863953-B21 16GB kit. Check each one’s buffer type before combining it with this LRDIMM. Browse the full server memory kit range for other sizes.

Right Part Checklist

• The label on your existing module shows 809208-B21, 819415-001, 809086-091 or 128GB 8Rx4.
• The speed code ends in L, confirming load reduced memory.
• The server is a DL360, DL380 or ML350 Gen9 with v4 processors.
• Any other DIMMs in the server are also LRDIMMs.
• Your planned total stays within what each processor model supports.

Sizing A Large Memory Upgrade

Before buying several 128GB kits, work out the memory each processor actually needs. Hypervisors and databases often report peak memory use in their monitoring tools. Add headroom for growth, divide by the number of processors and then by the number of channels. That gives the module count per channel, and it often shows whether 64GB or 128GB modules give the better cost per useful gigabyte.

Buying HPE 809208-B21 in the UK

Businesses, IT teams, resellers and repairers across the UK buy server memory from Euroland IT Store. Use the product page to check condition, warranty, stock and delivery information. Spend above £100 + VAT and we cover the cost of sending this 128GB kit anywhere on the UK mainland. Our team can review your server model, processors and the part numbers on your current DIMMs before you commit, so get in touch or call 0203 209 6002.

Frequently Asked Questions

What capacity is the HPE 809208-B21?

The 809208-B21 is a 128GB kit containing one octal rank x4 DDR4-2400 load reduced DIMM.

Is the 809208-B21 compatible with my Gen9 server?

It is listed for the DL360 Gen9, DL380 Gen9 and ML350 Gen9 with E5-2600 v4 processors, so confirm your model and processors first.

How do New and Refurbished kits differ?

New kits are unused, while Refurbished kits are previously used modules offered at a lower price, and the product page describes each condition.

What warranty applies?

Cover for this 128GB kit varies between New and Refurbished stock, and the product page states the terms for each.

Can you deliver anywhere in the UK?

Yes, we deliver across the UK, with free UK mainland shipping on orders over £100 + VAT and delivery information on the product page.