United States$5,000,000+
Inventory Delivered By
Z
Zane Monroe
4
2GB DRAM module ensures high performance and stable operations for Cisco ISR routers.
MEM-3900-2GB=
Original Stock
Ready to Ship
2GB DRAM (1 DIMM) for Cisco 3925/3945 ISR, Spare
FEATURED DEAL
Name:
MEM-3900-2GB=
- Description:
- 2GB DRAM (1 DIMM) for Cisco 3925/3945 ISR, Spare
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 23531119201
- Condition:
- Warranty:
- 3
- List Price:
$805.00
- Price:
$34.0095.8% off
Quantity:
1
Business price:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
TRUSTED, TRIED, PROVEN
Officially Accredited
& Verified By
Next-Gen IT
Solutions Powered By
MEM-3900-2GB= Overview
MEM-3900-2GB= is a high-quality DDR4 memory module featuring a 2 GB capacity operating at 2400 MHz with a CAS latency of CL16 and a standard voltage of 1.2V. It is built in a UDIMM form factor, configured as a Single Channel module with non-ECC support and an Unbuffered design, ensuring broad compatibility across desktop, laptop, and server platforms.
This module comes with an integrated heatspreader to provide an effective thermal solution and does not include RGB lighting, keeping its design simple and efficient. Optimized for general use, it is ideal for workstation and everyday computing builds, delivering reliable performance as specified by the official vendor documentation.
MEM-3900-2GB= price is $34.00, a 95.8% saving from the Cisco list price of $805.00. MEM-3900-2GB= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-3900-2GB= for additional pricing. Browse the full 3900 Router Memory & Flash series or explore all Cisco products.
MEM-3900-2GB= Specifications
- Height
- 1.2 inches
- Weight
- 0.35 lbs
- Width
- 5.3 inches
- Depth
- 0.3 inches
- Operating Temperature
- N/A
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Compatible Platforms
- Desktop / Laptop / Server
- Form Factor
- UDIMM
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Kit Configuration
- Single Channel
- AMD Platform Support
- AMD Ryzen 3000
- Compatible Systems
- N/A
- Voltage
- 1.2V
- XMP Support
- No
- Capacity
- 2 GB
- Speed
- 2400 MHz
- Use Case
- General Use
- Intel Platform Support
- Intel Xeon E
- Product Name
- MEM-3900-2GB=
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| MEM-3900-2GB= |  MEM-3900-1GU4GB |  MEM-3900-512MB= |  MEM-3900-1GB= |  MEM-3900-1GU2GB | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 2 GB | 4 GB | 512 GB | 1 GB | 4 GB |
| Compatible Platforms | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server |
| Compatible Systems | N/A | N/A | Workstation | N/A | N/A |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 2400 MHz | 3200 MHz | 3200 MHz | 3200 MHz | 3600 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 | CL19 | CL16 |
| Voltage | 1.2V | 1.35V | 1.35V | 1.35V | 1.35V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | No | No | Intel XMP 2.0 | No | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Intel Platform Support | Intel Xeon E | N/A | Intel 13th Gen | Intel 11th Gen | N/A |
| AMD Platform Support | AMD Ryzen 3000 | N/A | AMD Ryzen 5000 | AMD Ryzen 3000 | N/A |
| Use Case | General Use | Gaming / Workstation | Workstation | Workstation | General Use |
| Product Name | MEM-3900-2GB= | MEM-3900-1GU4GB | MEM-3900-512MB= | MEM-3900-1GB= | MEM-3900-1GU2GB |
| Height | 1.2 inches | 1.23 inches | 1.2 inches | 1.2 inches | 1.4 inches |
| Width | 5.3 inches | 5.25 inches | 5.3 inches | 5.3 inches | 5.3 inches |
| Depth | 0.3 inches | 0.14 inches | 0.6 inches | 0.3 inches | 0.5 inches |
| Weight | 0.35 lbs | 0.20 lbs | 0.3 lbs | 0.2 lbs | 0.25 lbs |
Reviews & Ratings
A
Amara Tate
4
Professional-grade memory upgrade with reliable throughput improvements.
B
Bennett Hayes
5
Easy to install and enhances overall system responsiveness.
C
Clara Blake
5
Reliable and stable for enterprise-grade router deployments.
D
Dante Carter
5
Boosts performance for demanding network applications.
Questions & Answers
What is the capacity of MEM-3900-2GB= for Cisco 3925/3945 ISR?
MEM-3900-2GB= provides 2 GB of DDR3 DRAM in a single DIMM, designed to expand memory on Cisco 3925 and 3945 Integrated Services Routers.
Is MEM-3900-2GB= compatible with Cisco 3925 and 3945 ISR models?
Yes. MEM-3900-2GB= is fully compatible with Cisco 3925 and 3945 ISR platforms and meets Cisco’s memory specifications.
How do I install the 2 GB DRAM DIMM in my Cisco 3925/3945 ISR?
Power off the router, remove the cover, align the DIMM on the memory slot, press until it clicks, replace the cover, and power on.
Will adding MEM-3900-2GB= improve my router’s performance?
Yes. Increasing DRAM to 2 GB enhances multitasking, speeds up data processing, and supports higher throughput on ISR 3925/3945.
Does MEM-3900-2GB= support error correction (ECC)?
Yes. MEM-3900-2GB= includes ECC functionality to detect and correct single-bit memory errors, ensuring high data integrity.
Can I mix MEM-3900-2GB= with other memory modules in my router?
Cisco recommends using identical memory modules. Mixing different capacities or speeds may cause instability.
What warranty covers the MEM-3900-2GB=?
MEM-3900-2GB= is backed by Cisco’s limited lifetime warranty when purchased from an authorized reseller.
How do I verify the router recognizes the new 2 GB DRAM?
After installation, access the CLI and enter "show memory summary" to confirm the total installed DRAM matches 2 GB.
Is this memory a genuine Cisco spare part?
Yes. MEM-3900-2GB= is a genuine Cisco spare part, manufactured to Cisco’s quality and compatibility standards.
Can I return MEM-3900-2GB= if it doesn’t fit my hardware?
Returns are accepted within the seller’s specified return window, provided the module is undamaged and in original packaging.
What operating environments does MEM-3900-2GB= support?
The module supports standard Cisco ISR operating conditions: 0° to 40°C (32° to 104°F) and relative humidity up to 85%.
How reliable is MEM-3900-2GB= in continuous operation?
Designed for 24/7 operation, MEM-3900-2GB= undergoes rigorous testing to ensure high reliability and stability in production networks.
Does MEM-3900-2GB= require any special firmware updates?
No. Cisco IOS software automatically detects and utilizes the new DRAM without additional firmware updates.
What are the physical dimensions of the DIMM?
The MEM-3900-2GB= DIMM measures standard full-height module dimensions: 133.35 mm × 30 mm (5.25″ × 1.18″).
Can I install MEM-3900-2GB= with the router powered on?
No. To avoid damage and ensure safety, always power off and unplug the router before installing the DRAM module.
How do I troubleshoot if the router doesn’t detect the new DRAM?
Reseat the module, verify slot cleanliness, confirm compatibility, and reboot. If issues persist, consult Cisco support.
Where can I purchase the genuine MEM-3900-2GB=?
Purchase MEM-3900-2GB= from Cisco authorized resellers or the Cisco Store to ensure authenticity and warranty coverage.