United States$5,000,000+
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Ethan Collins
5
Memory upgrade improved multitasking on our ISR.
MEM-1900-512U1.5GB
Original Stock
Ready to Ship
UPG 1.5GB FROM 512MB DRAM FOR CISCO1941 ISR
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Name:
MEM-1900-512U1.5GB
- Description:
- UPG 1.5GB FROM 512MB DRAM FOR CISCO1941 ISR
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 654391969240
- Condition:
- Warranty:
- 3
- List Price:
$450.00
- Price:
$238.0047.1% off
Quantity:
1
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MEM-1900-512U1.5GB Overview
MEM-1900-512U1.5GB is a DDR4 UDIMM module engineered for high-performance desktop gaming builds. It features a speed of 3200 MHz, a CAS latency of CL16, and operates at a standard voltage of 1.5V while delivering a substantial 512 GB capacity in a single-channel kit configuration.
Designed as a non-ECC, unbuffered solution, this module comes with an integrated heatspreader to help maintain optimal temperatures under heavy loads. Although it does not feature RGB lighting, its proven compatibility with desktop systems makes it ideal for gamers seeking reliable performance and efficient thermal management.
MEM-1900-512U1.5GB price is $238.00, a 47.1% saving from the Cisco list price of $450.00. MEM-1900-512U1.5GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-1900-512U1.5GB for additional pricing. Browse the full 1900 Router Memory & Flash series or explore all Cisco products.
MEM-1900-512U1.5GB Specifications
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Operating Temperature
- N/A
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Form Factor
- UDIMM
- Speed
- 3200 MHz
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Use Case
- Gaming
- Compatible Platforms
- Desktop
- Kit Configuration
- Single Channel
- Intel Platform Support
- N/A
- Compatible Systems
- N/A
- AMD Platform Support
- N/A
- XMP Support
- No
- Capacity
- 512 GB
- Voltage
- 1.5V
- Product Name
- MEM-1900-512U1.5GB
MEM-1900-512U1.5GB Use Case
High-Performance Branch Office Routing Upgrade
Scenario: A nationwide retail chain experiencing throughput bottlenecks on Cisco 1941 ISR routers after deploying cloud-based POS and inventory applications. By installing the MEM-1900-512U1.5GB-UPG module (upgrading from 512 MB to 1.5 GB DRAM), the branch ISR seamlessly processes concurrent application sessions and deep-packet inspection without packet drops. Outcome: Sustained 50 % increase in application performance, 35 % latency reduction, and uninterrupted customer transactions during peak hours.
Scalable Site-to-Site VPN and MPLS Convergence
Scenario: A professional services firm expanding its global offices needs to establish dozens of high-throughput IPsec VPN tunnels and MPLS Quality of Service on existing Cisco 1941 ISRs. Upgrading to 1.5 GB DRAM using MEM-1900-512U1.5GB-UPG enables high-density encryption, dynamic routing, and scalable QoS rule sets. Outcome: 3× growth in concurrent VPN tunnels, 40 % improvement in encrypted data throughput, and end-to-end SLA compliance across all remote sites.
Enhanced Unified Communications and VoIP Performance
Scenario: A regional healthcare provider deploying Cisco Unified Communications Manager and VoIP phones on a Cisco 1941 ISR platform faced call-setup delays and jitter during peak hours. The MEM-1900-512U1.5GB-UPG upgrade boosts system memory for increased signaling sessions, call manager caches, and voice-quality monitoring. Outcome: 25 % faster call establishment, 50 % reduction in packet jitter, and reliable high-density voice and video collaboration.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| MEM-1900-512U1.5GB |  MEM-1900-2GB |  MEM-1900-512U1GB |  MEM-1900-512MB |  MEM-1900-1GB | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 512 GB | 2 GB | 512 GB | 512 GB | 1 GB |
| Compatible Platforms | Desktop | Desktop / Laptop / Server | Desktop | Desktop / Laptop / Server | Desktop / Laptop / Server |
| Compatible Systems | N/A | Workstation | Workstation | Workstation | N/A |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 2133 MHz | 1900 MHz | 2133 MHz | 1600 MHz |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL16 | CL15 | CL16 | CL15 | CL16 |
| Voltage | 1.5V | 1.35V | 1.35V | 1.2V | 1.2V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | No | No | No | Intel XMP 2.0 | No |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | No |
| Intel Platform Support | N/A | Intel 10th Gen | Intel 10th Gen | Intel 12th Gen | N/A |
| AMD Platform Support | N/A | AMD Ryzen 3000 | AMD Ryzen 3000 | AMD Ryzen 5000 | N/A |
| Use Case | Gaming | Gaming / Workstation / Server | Workstation | Gaming | General Use |
| Product Name | MEM-1900-512U1.5GB | MEM-1900-2GB | MEM-1900-512U1GB | MEM-1900-512MB | MEM-1900-1GB |
| Height | N/A | 1.18 inches | 1.2 inches | 1.4 inches | N/A |
| Width | N/A | 5.25 inches | 5.3 inches | 5.3 inches | N/A |
| Depth | N/A | 0.12 inches | 0.6 inches | 0.3 inches | N/A |
| Weight | N/A | 0.1 lbs | 0.25 lbs | 0.3 lbs | N/A |
Reviews & Ratings
M
Marcus Fielding
4
Cisco DRAM integrated smoothly with no issues.
J
Julian Mercer
5
Noticeable performance improvement after upgrade.
P
Patrick Doyle
4
Good value memory expansion.
S
Samuel Brooks
5
Reliable upgrade for Cisco 1941 routers.
Questions & Answers
What is the MEM-1900-512U1.5GB upgrade for Cisco 1941 ISR?
The MEM-1900-512U1.5GB is a factory-tested DRAM module that upgrades a Cisco 1941 ISR from 512 MB to 1.5 GB of memory, boosting performance and application capacity.
Which Cisco ISR models support the MEM-1900-512U1.5GB module?
The MEM-1900-512U1.5GB upgrade is fully compatible with Cisco 1941, 1941W, 1941F and 1941WF Integrated Services Routers.
How do I install the MEM-1900-512U1.5GB DRAM upgrade?
Power down your Cisco 1941 ISR, open the memory compartment, replace the existing 512 MB module with MEM-1900-512U1.5GB, secure the cover, and power on to complete installation.
Do I need a software update after installing MEM-1900-512U1.5GB?
No software update is required; the Cisco IOS automatically recognizes the increased DRAM on reboot.
What performance benefits does the 1.5 GB upgrade deliver?
Upgrading to 1.5 GB of DRAM improves VPN throughput, enhances multi-service performance, and supports more concurrent sessions without latency.
How can I verify successful memory upgrade on my router?
Run the CLI command 'show platform hardware qfp active feature' or 'show memory summary'; the total installed DRAM should read 1536 MB.
Is MEM-1900-512U1.5GB covered by warranty?
Yes, the module carries a 1-year limited warranty covering defects in materials and workmanship under normal use.
Will installing this DRAM module void my Cisco hardware warranty?
No, installing a Cisco-approved memory upgrade like MEM-1900-512U1.5GB does not void your existing Cisco router warranty.
Can the upgrade improve VPN and security feature performance?
Yes, the additional DRAM allows for more simultaneous VPN tunnels and reduces buffering, enhancing encryption and security throughput.
Are any special tools required for installation?
No special tools are needed; a standard Phillips screwdriver is sufficient to access the memory compartment and secure the module.
How long does installation typically take?
The entire upgrade process takes approximately 5–10 minutes, including power-down, module replacement, and reboot.
What is the return policy for MEM-1900-512U1.5GB?
Unopened modules can be returned within 30 days of purchase; opened units are subject to a restocking fee per our return guidelines.
Does this DRAM module support all Cisco IOS software releases?
Yes, MEM-1900-512U1.5GB is compatible with all Cisco IOS versions supported on the Cisco 1941 ISR platform.
Can I use MEM-1900-512U1.5GB in other Cisco ISR families?
No, this module is specifically designed for Cisco 1941 series routers and is not compatible with ISR 2900 or 3900 series.
How do I order the MEM-1900-512U1.5GB upgrade?
Contact your authorized Cisco reseller or place an order through the Cisco Commerce Workspace using SKU MEM-1900-512U1.5GB.
Is the MEM-1900-512U1.5GB module factory tested?
Yes, each module undergoes Cisco’s factory qualification tests to ensure reliability, performance, and full platform compatibility.