# Memory module HP 16 GB DDR4 2666 MHz ECC 288-pin DIMM (1 x 16 GB, CL19)

**URL:** https://aio.lv/en/product--hp-835955-b21--4974589
**Data updated:** 2026-03-11 11:49 (EET)
**Category:** Memory (RAM)
**Manufacturer:** HP
**Manufacturer code:** 835955-B21
**EAN:** 889894339263
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 644.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 533.05 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hp-835955-b21--4974589

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.89 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

Server/PC memory module HP 835955-B21, 1 x 16 GB DDR4 ECC DIMM with 2666 MHz clock and CL19 latency. 288‑pin form factor designed for internal system memory expansion in compatible servers and workstations. Provides error-correcting code (ECC) for improved data integrity in critical applications and virtualization environments.

## Long description

HP 16 GB DDR4 2666 MHz ECC 288-pin DIMM (1 x 16 GB, CL19) is a server-grade memory module designed for internal system memory expansion in compatible HP and HPE servers and workstations. This 16 GB DDR4 DIMM operates at 2666 MHz with CL19 latency and supports error-correcting code (ECC) to improve data integrity in critical applications, virtualization and database workloads. The 288‑pin form factor fits standard DDR4 DIMM slots used in many rack and tower servers, and the module is engineered to meet qualification and testing standards for reliable operation in enterprise environments.
Advantages
This HP memory module offers ECC support to detect and correct single-bit memory errors, reducing the risk of data corruption in servers and workstations where uptime and accuracy are important. Running at 2666 MHz with CL19 timing, it provides a balance of capacity and bandwidth suitable for multi-core processors and memory-intensive tasks. The 1 × 16 GB configuration gives a straightforward way to increase system memory without replacing existing modules, while the 288-pin DDR4 form factor ensures compatibility with systems that accept standard DDR4 ECC DIMMs.
Suitable for
Server and workstation memory upgrades to increase available RAM capacity
Virtualization hosts and hypervisor environments requiring reliable ECC memory
Database and in-memory applications that benefit from additional DRAM capacity
Replacement or expansion in systems that use 288-pin DDR4 ECC DIMMs
Key specifications
Memory type: DDR4 ECC DIMM
Capacity: 16 GB (single module)
Effective clock speed: 2666 MHz
CAS latency: CL19
Form factor: 288-pin DIMM
Error correction: ECC (single-bit error correction)
How to use
Power off the server or workstation and disconnect it from mains power before installing the memory module. Open the system chassis according to the manufacturer’s instructions, locate an empty compatible 288‑pin DDR4 DIMM slot or replace an existing module if needed, and align the notch on the module with the slot key. Firmly press the module into the slot until the retention clips engage. Close the chassis, reconnect power and start the system. Verify that the new module is recognized in BIOS/UEFI or by the system management tools and that ECC functionality is enabled where applicable.
Usage recommendations
Use this HP 16 GB DDR4 2666 MHz ECC DIMM in systems specified to support DDR4 ECC 288‑pin modules and follow server vendor compatibility lists. For best results in multi-module configurations, install modules in matched pairs or per motherboard population guidelines, and use HPE-validated memory combinations when deploying in HPE ProLiant Gen9/Gen10 and compatible platforms to ensure optimal reliability and performance.

## Specifications

### Features

| Feature | Value |
|---|---|
| Internal memory | 16 GB |
| Internal memory type | DDR4 |
| Memory clock speed | 2666 MHz |
| Memory form factor | 288-pin DIMM |
| Memory voltage | 1.2 |
| ECC | Yes |
| CAS latency | 19 |
| Memory ranking | 2 |
| Component for | PC/Server |
| Memory layout (modules x size) | 1 x 16 |
| Buffered memory type | Registered (buffered) |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.045 kg |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733020 |

## FAQ

### How much does the HP 16 GB DDR4 2666 MHz ECC DIMM cost, and is it available for purchase?

The price is 644.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 10.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can HP 16 GB DDR4 2666 MHz ECC DIMM be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All HP products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HP service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: internal memory, internal memory type, memory clock speed, memory form factor, weight, memory voltage, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/4974589/59220447_large.webp