United States$5,000,000+
Inventory Delivered By
C
Carlos Bennett
5
Large flash upgrade handled multiple IOS images easily.
MEM-CF-256U4GB
256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900
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Name:
MEM-CF-256U4GB
- Description:
- 256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818249751610
- Condition:
- Warranty:
- 3
- List Price:
$1,656.00
- Price:
$578.0065.1% off
Quantity:
1
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MEM-CF-256U4GB Overview
MEM-CF-256U4GB is a DDR4 UDIMM engineered for high-performance desktop and server builds. This memory module features a 256 GB capacity delivered via a Quad Channel kit configuration, operating at 3200 MHz speed with a CAS latency of CL16 and a voltage of 1.35V, while being non-ECC and unbuffered to ensure efficient performance in workstations.
Designed with an integrated heatspreader for optimal thermal management and built without RGB lighting, MEM-CF-256U4GB is perfectly suited for professional workstation and server applications. Its compatibility with Intel 12th Gen and AMD Ryzen 5000 platforms makes it a reliable choice for demanding overclocking and high-performance computing tasks.
MEM-CF-256U4GB price is $578.00, a 65.1% saving from the Cisco list price of $1,656.00. MEM-CF-256U4GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-CF-256U4GB for additional pricing. Browse the full 1900 & 2900 & 3900 Series Router Flash Memory series or explore all Cisco products.
MEM-CF-256U4GB Specifications
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Capacity
- 256 GB
- Compatible Platforms
- Desktop / Server
- Compatible Systems
- Workstation
- Form Factor
- UDIMM
- Kit Configuration
- Quad 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
- Intel 12th Gen
- AMD Platform Support
- AMD Ryzen 5000
- Use Case
- Workstation
- Product Name
- MEM-CF-256U4GB
- Height
- 1.3 inches
- Width
- 5.3 inches
- Depth
- 0.2 inches
- Weight
- 0.3 lbs
MEM-CF-256U4GB Use Case
Branch Office Business Continuity with MEM-CF-256U4GB-256MB to 4GB Upgrade
In a nationwide retail chain deploying Cisco 1900 routers in 150 branch locations, upgrading the embedded 256MB Compact Flash to 4GB (MEM-CF-256U4GB-256MB to 4GB) enables storage of dual IOS images, full configuration backups, and local event logs. This ensures sub-minute failover when primary firmware is corrupted and accelerates recovery, delivering 99.9% network availability and reducing on-site maintenance costs.
Security Logging & Compliance Archiving on Cisco 2900/3900 Routers
A financial services firm uses Cisco 2900 and 3900 series routers to aggregate branch office traffic and must retain syslog, NetFlow, and packet-capture data for 90-day audits. By installing the MEM-CF-256U4GB-256MB to 4GB Compact Flash upgrade, each router securely stores high-volume logs locally, supporting automated off-peak transfers to SIEM systems and ensuring PCI DSS and SOX compliance with zero packet loss during peak trading hours.
Advanced QoS, Modular Features & IP SLA on Cisco 3900 Platforms
An enterprise campus network running Cisco 3900 routers requires granular Quality of Service, IP SLA probes, and application-aware services for VoIP and video conferencing. Upgrading from 256MB to 4GB Compact Flash (MEM-CF-256U4GB-256MB to 4GB) provides the file system capacity to host large QoS policy templates, extended performance routing databases, and firmware images for modular feature sets. The result is sub-5ms jitter for voice, dynamic path selection for critical applications, and simplified version control for network automation.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 MEM-CF-256U4GB |  MEM-CF-2GB |  MEM-CF-4GB= |  MEM-CF-256U512MB |  MEM-CF-1GB= | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 256 GB | 2 GB | 4 GB | 512 GB | 8 GB |
| Compatible Platforms | Desktop / Server | Desktop | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop |
| Compatible Systems | Workstation | Tower Server | Workstation | Tower Server | N/A |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Quad Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 2400 MHz | 3200 MHz | 3200 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 | CL16 |
| Voltage | 1.35V | 1.35V | 1.2V | 1.35V | 1.2V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | Intel XMP 2.0 | No | 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 | Intel 12th Gen | N/A | Intel 12th Gen | Intel 12th Gen | Intel 12th Gen |
| AMD Platform Support | AMD Ryzen 5000 | N/A | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 |
| Use Case | Workstation | Gaming | Gaming | Gaming | Gaming |
| Product Name | MEM-CF-256U4GB | MEM-CF-2GB | MEM-CF-4GB= | MEM-CF-256U512MB | MEM-CF-1GB DDR4 8GB UDIMM |
| Height | 1.3 inches | N/A | 1.4 inches | 1.2 inches | 1.25 inches |
| Width | 5.3 inches | N/A | 5.3 inches | 5.3 inches | 5.25 inches |
| Depth | 0.2 inches | N/A | 0.5 inches | 0.2 inches | 0.14 inches |
| Weight | 0.3 lbs | N/A | 0.25 lbs | 0.3 lbs | 0.1 lbs |
Reviews & Ratings
V
Victor Hughes
4
Cisco flash delivered stable and fast access.
D
Daniel Prescott
5
Excellent option for ISR upgrades.
A
Anthony Miller
3
No compatibility issues and smooth performance.
R
Robert Sinclair
4
Reliable storage upgrade for enterprise routers.
Questions & Answers
What is the MEM-CF-256U4GB Compact Flash Upgrade for Cisco 1900, 2900, 3900?
The MEM-CF-256U4GB is a high-performance Compact Flash card that upgrades Cisco 1900, 2900, and 3900 series routers from 256 MB to 4 GB of storage for IOS images, logs, and configurations.
Which Cisco router models are compatible with the MEM-CF-256U4GB upgrade?
This Compact Flash upgrade is fully compatible with Cisco ISR 1900, 2900, and 3900 series routers that support a standard Type I/II Compact Flash slot.
How do I install the 256 MB to 4 GB Compact Flash in my Cisco router?
Power off the router, open the Compact Flash slot cover, insert the card until it clicks, secure the cover, and power on. The router will detect the new storage automatically.
Is the MEM-CF-256U4GB plug-and-play?
Yes. The upgrade is plug-and-play. After insertion and reboot, the router recognizes the additional capacity without manual driver installation.