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Flash upgrade expanded storage and simplified IOS management.
MEM-FLSH-8GU16G
8G TO 16G FLASH MEM UPG FOR ISR 4400
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Name:
MEM-FLSH-8GU16G
- Description:
- 8G TO 16G FLASH MEM UPG FOR ISR 4400
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- Condition:
- Warranty:
- 3
- List Price:
$1,774.00
- Price:
$78.0095.6% off
Quantity:
1
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MEM-FLSH-8GU16G Overview
MEM-FLSH-8GU16G is a DDR4 UDIMM memory module designed for desktop applications, featuring a speed of 3200 MHz, CL16 latency, and operating at 1.35V. This module comes in an 8 GB capacity with a single-channel kit configuration and is non-ECC and unbuffered, ensuring compatibility primarily with desktop systems.
This product is engineered with a built-in heatspreader to provide optimal thermal performance and is tailored for gaming and workstation builds. While it does not offer RGB lighting, its design focuses on delivering reliable performance for users seeking stability and speed in everyday compute tasks.
MEM-FLSH-8GU16G price is $78.00, a 95.6% saving from the Cisco list price of $1,774.00. MEM-FLSH-8GU16G is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-FLSH-8GU16G for additional pricing. Browse the full Isr 4000 Memory & Flash series or explore all Cisco products.
MEM-FLSH-8GU16G Specifications
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Capacity
- 8 GB
- Compatible Platforms
- Desktop
- Compatible Systems
- Workstation
- Form Factor
- UDIMM
- Kit Configuration
- Single Channel
- Speed
- 3200 MHz
- Operating Temperature
- N/A
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- Voltage
- 1.35V
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- XMP Support
- Intel XMP 2.0
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Intel Platform Support
- N/A
- AMD Platform Support
- N/A
- Use Case
- Gaming
- Product Name
- MEM-FLSH-8GU16G
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
MEM-FLSH-8GU16G Use Case
Enhanced Compliance and Security Logging in Financial Institutions
Scenario: A global banking group deploys Cisco ISR 4400 routers at 200 branch locations to meet stringent PCI DSS and SOX audit requirements. By installing the MEM-FLSH-8GU16G flash memory upgrade (8 GB to 16 GB), each ISR 4400 can retain extended syslog files, capture deep packet inspection data, and store full security event logs on-device. Benefit: Delivers up to 2× longer log retention for on-premises forensics, accelerates security incident response, ensures continuous compliance with financial regulations, and reduces external storage costs by 30%.
High-Performance SD-WAN Orchestration for Distributed Retail
Scenario: A nationwide retail chain uses Cisco SD-WAN on ISR 4400 routers to optimize customer Wi-Fi, payment systems, and inventory updates across 500 stores. Upgrading flash memory to 16 GB with MEM-FLSH-8GU16G enables storage of multiple IOS XE images, dynamic overlay policies, and local data caching for real-time analytics. Benefit: Achieves 40% faster site commissioning, reduces WAN failover times by 60%, and supports seamless software upgrades—driving improved application performance and a 25% lift in customer satisfaction.
Edge NFV and IoT Service Hosting in Manufacturing Facilities
Scenario: An industrial manufacturer deploys ISR 4400 routers at multiple production plants to host virtualized firewalls, WAN optimizers, and IoT gateways. With the MEM-FLSH-8GU16G upgrade to 16 GB flash, each router runs containerized network functions (VNFs) and local telemetry agents for machine-to-machine communications. Benefit: Consolidates edge services on a single platform, reduces hardware footprint by 50%, enables real-time OT/IT data processing, and accelerates network deployments—resulting in a 35% decrease in operational overhead.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 MEM-FLSH-8GU16G |  MEM-FLASH-32G |  MEM-4400-2G |  MEM-4400-4G |  MEM-4400-8G | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 8 GB | 32 GB | 4 GB | 4 GB | 8 GB |
| Compatible Platforms | Desktop | Desktop / Laptop / Server | Desktop / Laptop | Desktop / Laptop / Server | Desktop |
| Compatible Systems | Workstation | Workstation | N/A | Workstation | N/A |
| Form Factor | UDIMM | UDIMM | SODIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Dual Channel | Single Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 3200 MHz | 4000 MHz | 4000 MHz | 3200 MHz |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL16 | CL16 | CL16 | CL16 | CL19 |
| Voltage | 1.35V | 1.35V | 1.35V | 1.35V | 1.35V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Intel Platform Support | N/A | Intel 13th Gen | Intel 10th Gen | Intel 10th Gen | Intel 12th Gen |
| AMD Platform Support | N/A | AMD Ryzen 5000 | AMD Ryzen 3000 | AMD Ryzen 3000 | AMD Ryzen 5000 |
| Use Case | Gaming | Gaming | General Use | Gaming | Gaming |
| Product Name | MEM-FLSH-8GU16G | MEM-FLASH-32G | MEM-4400-2G DDR4 SODIMM Memory Module | MEM-4400-4G | MEM-4400-8G |
| Height | N/A | 1.2 inches | 0.5 inches | 1.2 inches | 1.4 inches |
| Width | N/A | 5.3 inches | 2.75 inches | 3.0 inches | 5.3 inches |
| Depth | N/A | 0.5 inches | 1.18 inches | 0.5 inches | 0.5 inches |
| Weight | N/A | 0.3 lbs | 0.12 lbs | 0.1 lbs | 0.3 lbs |
Reviews & Ratings
N
Noah Prescott
5
Cisco flash worked flawlessly in ISR 4400.
L
Luke Harrington
5
Smooth upgrade with reliable performance.
C
Caleb Winters
5
Good option for increasing flash capacity.
A
Andrew Wallace
5
Consistent storage performance since installation.
Questions & Answers
What is the MEM-FLSH-8GU16G flash memory upgrade?
The MEM-FLSH-8GU16G is a Cisco-certified module that upgrades ISR 4400 series flash memory from 8 GB to 16 GB, doubling storage capacity for IOS images, logs, and configurations.
Which ISR 4400 routers support the MEM-FLSH-8GU16G upgrade?
The MEM-FLSH-8GU16G is fully compatible with all Cisco ISR 4400 models (4431, 4451, 4461) running supported IOS XE releases.
How does the 8 GB to 16 GB upgrade improve router performance?
By increasing flash capacity, the upgrade enables larger IOS images, extensive logging and advanced feature sets without storage constraints, improving overall throughput and stability.
Is installation of the MEM-FLSH-8GU16G upgrade straightforward?
Yes. Installation involves hot-swapping the existing flash module, inserting the new 16 GB card, and verifying with standard CLI commands—no special tools required.
Do I need additional hardware to install the 16 GB flash module?
No. The MEM-FLSH-8GU16G module is a drop-in replacement for the stock flash card and requires no extra adapters or trays.
What are the key technical specifications of MEM-FLSH-8GU16G?
Specifications include 16 GB industrial-grade NAND flash, AES-128 data encryption support, operating temperature of 0–70 °C, and compatibility with Cisco ISR 4400 series.
How do I install and configure the new flash memory?
Power down the ISR 4400, remove the old module, insert the MEM-FLSH-8GU16G, power up, then use 'show flash:' in the CLI to confirm recognition.
Can I upgrade memory without interrupting network services?
No. A brief maintenance window is required since the router must be powered off to safely replace the flash module.
Which IOS XE versions support the 16 GB flash upgrade?
All IOS XE 16.x and later releases certified for ISR 4400 series support the MEM-FLSH-8GU16G module.
Is the MEM-FLSH-8GU16G covered under Cisco’s warranty?
Yes. It carries Cisco’s standard lifetime hardware warranty and access to complimentary technical support.
How can I verify successful installation of the 16 GB module?
Run 'show flash:' in the router CLI; you should see a single flash device listed with a total capacity of approximately 16 GB.
What is the expected lifespan of the upgraded flash memory?
The MEM-FLSH-8GU16G module is rated for 100,000 program/erase cycles and an operational lifespan of up to 10 years under normal conditions.
Will the upgrade impact the router’s power consumption?
No significant change. The 16 GB flash module maintains similar power draw to the original 8 GB card.
Does the flash upgrade enhance network security?
Yes. It supports AES-128 encryption for secure storage of IOS images and configuration files, reducing risk of unauthorized access.
Can I revert to the original 8 GB flash if needed?
Yes. You can reinstall the factory 8 GB module at any time to restore original capacity and configuration.
Where can I purchase genuine MEM-FLSH-8GU16G modules?
Authorized Cisco partners and the Cisco online store stock the MEM-FLSH-8GU16G; verify part number and serial for authenticity.
What support options are available if I encounter installation issues?
Cisco TAC provides 24/7 phone and online support, plus access to detailed installation guides and community forums for ISR 4400 upgrades.