United States
Name:
MEM-3900-1GB=
- Description:
- 1GB DRAM (1 DIMM) for Cisco 3925/3945 ISR, Spare
- Rating:
-
(0)
Added to cart 36 times recently
- Availability:
-
In stock - Ready to Ship
- Brand:
- Cisco
- Condition:
- GTIN:
- 638266993691
- Warranty:
-
3 - List Price:
-
- Price:
-
Quantity:
1
Business price:
Enroll your business for free
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.
Exclusive Bulk Discounts tailored to your order size
Priority Processing with a dedicated account manager
Fast Response: Get your custom quote within 5-10 minutes during business hours (Mon-Fri, 6:00 AM – 6:00 PM PST)
Holiday Bonus: Submissions on holidays receive priority handling the next business day
Shipping:
Payment:
Shipping as per your need
Same-day Shipping
Express Delivery Across the USA
Need it fast? Choose Express Shipping and receive your order within 1–3 business days.
Free Ground Shipping Available
Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.
International Shipments Made Simple
For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines
Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.
Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
14-Day Money Back Guarantee
Free 14-Day Returns
Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
MEM-3900-1GB=
1GB DRAM (1 DIMM) for Cisco 3925/3945 ISR, Spare
$690.00
$253.00
19 in Global Warehouse
$253.00
63% off
TRUSTED, TRIED, PROVEN
MEM-3900-1GB= Overview
MEM-3900-1GB= is a high-performance DDR4 memory module engineered in a UDIMM form factor specifically for desktop systems. This module comes as a single-channel kit with a total capacity of 1 GB, operating at a speed of 3200 MHz with a CAS latency of CL19 and a 1.35V operating voltage, all delivered in a non-ECC, unbuffered format with an integrated heatspreader for optimal thermal management.
MEM-3900-1GB= is optimized for workstation builds where reliability and efficient performance are key. Its design excludes RGB lighting to focus on stability, while ensuring compatibility with Intel 11th Gen and AMD Ryzen 3000 platforms, thereby meeting the rigorous demands of modern, high-intensity computing environments.
What is the price of MEM-3900-1GB=?
Lowest price of MEM-3900-1GB= is $ 253.00. Shop now! Get further exclusive discounts with bulk quotation on MEM-3900-1GB=
Explore more options from Memory & Flash or explore other Cisco products.
MEM-3900-1GB= Specifications
| Product Type | Computer Memory |
| Memory Type | DDR4 |
| Capacity | 1 GB |
| Compatible Platforms | Desktop |
| Compatible Systems | N/A |
| Form Factor | UDIMM |
| Kit Configuration | Single Channel |
| Speed | 3200 MHz |
| Operating Temperature | N/A |
| Reliability Rating | Standard |
| CAS Latency (CL) | CL19 |
| Voltage | 1.35V |
| ECC Support | No |
| Registered/Buffered | Unbuffered |
| XMP Support | No |
| RGB Lighting | No |
| Heatsink / Heatspreader | Yes |
| Intel Platform Support | Intel 11th Gen |
| AMD Platform Support | AMD Ryzen 3000 |
| Use Case | Workstation |
| Product Name | MEM-3900-1GB= |
| Height | 1.2 inches |
| Width | 5.3 inches |
| Depth | 0.3 inches |
| Weight | 0.2 lbs |
MEM-3900-1GB= Use Case
High-Throughput Branch Office Acceleration with MEM-3900-1GB DRAM on Cisco 3925/3945 ISR
A multinational retail chain upgrades its Cisco 3925 ISR with MEM-3900-1GB DRAM (1 DIMM) spare to sustain surges in POS, video surveillance and VoIP traffic during peak hours. By boosting packet buffering and QoS scheduling, the branch router maintains 250 Mbps+ throughput with sub-5 ms latency. Benefit: consistent application performance, zero transaction delays and improved customer satisfaction.
Rapid Disaster Recovery & Zero-Downtime Swap-In for Cisco 3945 ISR
An enterprise IT team pre-stages a MEM-3900-1GB DRAM spare to ensure immediate replacement in the event of module failure on a Cisco 3945 ISR. The hot-swap process completes in under 10 minutes, restoring full routing, firewall and VPN services. Benefit: minimizes unplanned outages, preserves SLAs and reduces MTTR by up to 80%.
Enabling Advanced Security and Encrypted VPN Tunnels at the Edge
A financial services firm installs MEM-3900-1GB DRAM spare on its Cisco 3925 ISR to support stateful firewall inspection, IPSec and SSL VPNs for remote advisors. The memory upgrade accommodates larger connection tables and encryption buffers. Benefit: secures 150+ concurrent tunnels, enforces regulatory compliance and delivers end-to-end data protection.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
|
|
|
|
|
|
|---|---|---|---|---|---|
| AMD Platform Support | N/A | N/A | AMD Ryzen 3000 | AMD Ryzen 3000 | AMD Ryzen 5000 |
| Capacity | 4 GB | 4 GB | 1 GB | 2 GB | 512 GB |
| CAS Latency (CL) | CL16 | CL16 | CL19 | CL16 | CL16 |
| Compatible Platforms | Desktop | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server | Desktop / Laptop / Server |
| Compatible Systems | N/A | N/A | N/A | N/A | Workstation |
| Depth | 0.14 inches | 0.5 inches | 0.3 inches | 0.3 inches | 0.6 inches |
| ECC Support | No | No | No | No | No |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Height | 1.23 inches | 1.4 inches | 1.2 inches | 1.2 inches | 1.2 inches |
| Intel Platform Support | N/A | N/A | Intel 11th Gen | Intel Xeon E | Intel 13th Gen |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Product Name | MEM-3900-1GU4GB | MEM-3900-1GU2GB | MEM-3900-1GB= | MEM-3900-2GB= | MEM-3900-512MB= |
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| RGB Lighting | No | No | No | No | No |
| Speed | 3200 MHz | 3600 MHz | 3200 MHz | 2400 MHz | 3200 MHz |
| Use Case | Gaming / Workstation | General Use | Workstation | General Use | Workstation |
| Voltage | 1.35V | 1.35V | 1.35V | 1.2V | 1.35V |
| Weight | 0.20 lbs | 0.25 lbs | 0.2 lbs | 0.35 lbs | 0.3 lbs |
| Width | 5.25 inches | 5.3 inches | 5.3 inches | 5.3 inches | 5.3 inches |
| XMP Support | No | Intel XMP 2.0 | No | No | Intel XMP 2.0 |
Showing - of 0 Results
Questions & Answers
Q
What is the Cisco MEM-3900-1GB= spare memory module?
A
The Cisco MEM-3900-1GB= is a 1GB DRAM 184-pin DIMM designed as a spare memory upgrade for Cisco ISR 3925 and 3945 series routers.
Q
Which Cisco ISR models are compatible with MEM-3900-1GB=?
A
The MEM-3900-1GB= is fully compatible with Cisco 3925 and 3945 ISR models, ensuring seamless integration and optimal performance.
Q
What are the key technical specifications of the 1GB DRAM DIMM?
A
This module is a 1GB DDR2 SDRAM, 184-pin form factor, operating at 533 MHz, supporting ECC and requiring 2.5 V power.
Q
How do I install the MEM-3900-1GB= in Cisco 3925/3945 routers?
A
Power off the router, remove the chassis cover, insert the MEM-3900-1GB= DIMM into the memory slot until it locks, replace the cover, and power on.
Q
Does the MEM-3900-1GB= support error-correcting code (ECC)?
A
Yes, the MEM-3900-1GB= module includes ECC to detect and correct single-bit memory errors for enhanced system stability.
Q
What performance improvements can I expect after installing the MEM-3900-1GB=?
A
Installing the MEM-3900-1GB= increases packet buffering capacity, improves routing table handling, and enhances throughput under heavy load.
Q
Is MEM-3900-1GB= an original Cisco Genuine spare part?
A
Yes, the MEM-3900-1GB= is a Cisco-approved genuine spare component, providing full manufacturer support and compatibility.
Q
Do I need to configure the router after installing the MEM-3900-1GB=?
A
No manual configuration is required; the router automatically detects and utilizes the additional memory upon reboot.
Q
How can I verify that the router recognizes the new 1GB memory module?
A
After reboot, issue the "show version" command in the CLI; the total system memory will reflect the added 1GB.
Q
Can I mix different memory sizes with the MEM-3900-1GB= in my Cisco router?
A
Cisco recommends using identical memory modules; mixing capacities is not supported and may lead to system instability.
Q
What is the standard warranty period for the MEM-3900-1GB= module?
A
Cisco provides a limited lifetime warranty on hardware spares, covering defects in materials and workmanship.
Q
What troubleshooting steps should I take if the module is not detected?
A
Reseat the DIMM, verify compatibility, update the IOS image, check "show memory" diagnostics, and contact Cisco TAC if needed.
Q
What is the maximum memory capacity supported by Cisco 3925 and 3945 ISR with this module?
A
Each ISR supports up to 4GB of DRAM; installing four 1GB modules maximizes system memory to 4GB.
Q
Where can I purchase the Cisco MEM-3900-1GB= spare part?
A
The MEM-3900-1GB= is available through authorized Cisco resellers, distributors, and the Cisco online store.
Q
What is the memory speed (frequency) of the MEM-3900-1GB= DIMM?
A
The MEM-3900-1GB= operates at 533 MHz DDR2 speed, delivering reliable throughput for ISR routing tasks.
Q
Does installing the MEM-3900-1GB= require any special tools or conditions?
A
No special tools are required; ensure the router is powered off and placed on a static-free surface before installation.
Q
How does adding MEM-3900-1GB= enhance the reliability of Cisco ISR routers?
A
Additional memory reduces buffer overflows, improves error correction, and enhances stability during peak network traffic.
