United States$5,000,000+
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R
Richard Nolan
5
Basic flash replacement that restored normal operation.
MEM-CF-256MB=
256MB COMPACT FLASH FOR CISCO 1900 2900 3900 ISR
FEATURED DEAL
Name:
MEM-CF-256MB=
- Description:
- 256MB COMPACT FLASH FOR CISCO 1900 2900 3900 ISR
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818249133553
- Condition:
- Warranty:
- 3
- List Price:
$460.00
- Price:
$168.0063.5% off
Quantity:
1
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MEM-CF-256MB= Overview
MEM-CF-256MB= is a high-performance DDR4 memory module engineered in a UDIMM form factor, designed to support desktop, laptop, and server platforms. It operates at 3200 MHz with a CAS latency of CL16 and a voltage of 1.35V, and is available in a single channel kit configuration featuring a 256 GB module that is non-ECC and unbuffered, complemented by an integrated heatspreader for improved thermal performance.
In addition to its core performance attributes, MEM-CF-256MB= is optimized for demanding setups such as gaming builds and workstation environments. Its compact design—with dimensions of approximately 1.2 inches in height, 5.3 inches in width, and 0.15 inches in depth, weighing around 0.3 lbs—ensures compatibility with a broad range of modern Intel and AMD platforms, making it a reliable choice for high-performance computing needs.
MEM-CF-256MB= price is $168.00, a 63.5% saving from the Cisco list price of $460.00. MEM-CF-256MB= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-CF-256MB= for additional pricing. Browse the full 1900 & 2900 & 3900 Series Router Flash Memory series or explore all Cisco products.
MEM-CF-256MB= Specifications
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Capacity
- 256 GB
- Compatible Platforms
- Desktop / Laptop / Server
- 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
- Intel 12th Gen
- AMD Platform Support
- AMD Ryzen 5000
- Use Case
- Gaming
- Product Name
- MEM-CF-256MB=
- Height
- 1.2 inches
- Width
- 5.3 inches
- Depth
- 0.15 inches
- Weight
- 0.3 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 MEM-CF-256MB= |  MEM-CF-4GB= |  MEM-CF-1GB= |  MEM-CF-256MB |  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 | 4 GB | 8 GB | 256 GB | 1 GB |
| Compatible Platforms | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server | Desktop / Laptop / Server |
| Compatible Systems | Workstation | Workstation | N/A | Workstation | Tower Server |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 3200 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 | 1.2V | 1.2V | 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 | No |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Intel Platform Support | Intel 12th Gen | Intel 12th Gen | Intel 12th Gen | Intel 12th Gen | N/A |
| AMD Platform Support | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 |
| Use Case | Gaming | Gaming | Gaming | Workstation | Gaming / Workstation / Server |
| Product Name | MEM-CF-256MB= | MEM-CF-4GB= | MEM-CF-1GB DDR4 8GB UDIMM | MEM-CF-256MB | MEM-CF-1GB |
| Height | 1.2 inches | 1.4 inches | 1.25 inches | N/A | N/A |
| Width | 5.3 inches | 5.3 inches | 5.25 inches | N/A | N/A |
| Depth | 0.15 inches | 0.5 inches | 0.14 inches | N/A | N/A |
| Weight | 0.3 lbs | 0.25 lbs | 0.1 lbs | N/A | N/A |
Reviews & Ratings
B
Brian Marshall
4
Cisco memory delivered stable storage performance.
E
Edward Price
5
Worked well for configuration and IOS storage.
M
Martin Shaw
5
Simple and reliable compact flash upgrade.
O
Oliver Reed
5
Good value for legacy router environments.
Questions & Answers
What is the MEM-CF-256MB= 256MB Compact Flash for Cisco 1900, 2900, 3900 ISR?
The MEM-CF-256MB= is a genuine Cisco 256MB Compact Flash card designed specifically for Cisco 1900, 2900 and 3900 Integrated Services Routers.
Which Cisco router models are compatible with the 256MB Compact Flash?
The MEM-CF-256MB= is fully compatible with Cisco ISR 1900, 2900 and 3900 series routers, ensuring seamless integration and reliable performance.
What is the storage capacity of MEM-CF-256MB=?
This Compact Flash card provides 256 megabytes of non-volatile storage for IOS images, configurations and log files.
What read/write speeds can I expect from this Compact Flash?
The MEM-CF-256MB= delivers up to 20 MB/s read and 10 MB/s write speeds, optimized for booting and application performance on Cisco ISRs.
How do I install the 256MB Compact Flash in my Cisco ISR?
Power off your router, open the CF slot cover, insert the card until it clicks, secure the cover and power on—no drivers or additional configuration required.
Do I need to format MEM-CF-256MB= before use?
Cisco routers automatically detect and format the CF card on first boot; manual formatting is not required.
Is the MEM-CF-256MB= an official Cisco product?
Yes. The MEM-CF-256MB= is an OEM Cisco part, guaranteed to meet Cisco’s quality, compatibility and reliability standards.
What operating temperature range does this Compact Flash support?
The MEM-CF-256MB= operates reliably between 0 °C and 70 °C (32 °F to 158 °F), suitable for standard telecom and data-center environments.
What is the expected lifespan of the 256MB Compact Flash?
Under normal operating conditions, the MEM-CF-256MB= offers up to 100,000 program/erase cycles and a minimum 10-year data retention life.
Can I store Cisco IOS images and configuration files on this CF card?
Yes. The 256MB capacity easily accommodates IOS images, startup configurations and system logs for ISR 1900, 2900 and 3900 routers.
How does using MEM-CF-256MB= affect router performance?
With fast read/write speeds and native integration, this CF card accelerates boot time, image loads and logging without impacting throughput.
Which file systems are supported on the MEM-CF-256MB=?
The card supports Cisco’s internal file system (CIFS) and FAT16 for out-of-band file transfers via compact flash.
Is the 256MB Compact Flash hot-swappable?
No. To ensure data integrity, power off the ISR before inserting or removing the MEM-CF-256MB= card.
What warranty does Cisco provide for MEM-CF-256MB=?
This Compact Flash card carries Cisco’s standard one-year warranty, covering defects in materials and workmanship.
What is the return policy if the MEM-CF-256MB= is faulty?
Defective units can be RMA’d within Cisco’s 30-day return window; replacements are issued upon validation of the fault.
Does the MEM-CF-256MB= support data encryption?
Data encryption is handled at the router level; the MEM-CF-256MB= supports encrypted file storage when enabled on your Cisco ISR.