United States$5,000,000+
Inventory Delivered By
F
Felix Donovan
4
Balanced upgrade improving routing efficiency.
MEM-2900-512U1.5GB
Original Stock
Ready to Ship
UPG 512MB TO 1.5GB DRAM 1GB+512MB FOR CISCO 2901-2921
FEATURED DEAL
Name:
MEM-2900-512U1.5GB
- Description:
- UPG 512MB TO 1.5GB DRAM 1GB+512MB FOR CISCO 2901-2921
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 841280174742
- Condition:
- Warranty:
- 3
- List Price:
$600.00
- Price:
$314.0047.7% 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-2900-512U1.5GB Overview
MEM-2900-512U1.5GB is a DDR3 UDIMM memory module operating at 1600 MHz with a CAS latency of CL11 and a standard voltage of 1.5V. Designed as a single channel kit, it is non-ECC and unbuffered, ensuring reliable compatibility with desktop systems while incorporating an integrated heatspreader for effective thermal management and no RGB lighting.
This module features a compact design optimized for efficient airflow and stable performance in various computing environments, including gaming, workstation, and general use builds. Its precise engineering and dimensions make it a dependable choice for users seeking balanced performance and durability in their desktop applications.
MEM-2900-512U1.5GB price is $314.00, a 47.7% saving from the Cisco list price of $600.00. MEM-2900-512U1.5GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2900-512U1.5GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
MEM-2900-512U1.5GB Specifications
- Product Type
- Computer Memory
- Memory Type
- DDR3
- Capacity
- 1.5GB
- Compatible Platforms
- Desktop
- Compatible Systems
- N/A
- Form Factor
- UDIMM
- Kit Configuration
- Single Channel
- Speed
- 1600 MHz
- Operating Temperature
- 0°C to 85°C
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL11
- Voltage
- 1.5V
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- XMP Support
- No
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Intel Platform Support
- N/A
- AMD Platform Support
- N/A
- Use Case
- General Use
- Product Name
- MEM-2900-512U1.5GB
- Height
- 1.5 inches
- Width
- 5.3 inches
- Depth
- 0.5 inches
- Weight
- 0.45 lbs
MEM-2900-512U1.5GB Use Case
High-Speed IPsec VPN Acceleration for Remote Branches
By installing the MEM-2900-512U1.5GB-UPG on Cisco 2901-2921 routers at distributed sites, IT teams expand DRAM to 1.5 GB, sustaining high-performance IPsec and SSL VPN tunnels under heavy concurrency. Organizations benefit from up to 50% faster encrypted throughput, reduced latency, and consistent remote access stability—boosting productivity and securing critical business data.
Scalable Unified Communications for Mid-Sized Enterprises
Equipping Cisco 2901 routers with the MEM-2900-512U1.5GB-UPG empowers UC Manager Express deployments to support larger call volumes, advanced voicemail and conferencing features. The memory upgrade delivers a 60% capacity increase in active endpoints, superior call quality under peak load, and simplified administration—enabling seamless collaboration and a future-proof communications platform.
Enhanced Firewall and Intrusion Prevention Capacity
Upgrading to 1.5 GB DRAM via MEM-2900-512U1.5GB-UPG on Cisco ISR 2901-2921 routers unlocks full Zone-Based Firewall, IPS and Application Visibility & Control capabilities without memory constraints. Security teams can deploy larger ACL sets, deeper packet inspections, and real-time threat feeds, resulting in robust perimeter defense, compliance readiness, and up to 40% improved threat-handling throughput.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| MEM-2900-512U1.5GB |  MEM-2900-512U1GB |  MEM-2951-512U1.5GB |  MEM-2951-512U1GB |  MEM-2900-512MB= | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR3 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 1.5GB | 512 GB | 512 GB | 512 GB | 512 MB |
| Compatible Platforms | Desktop | Desktop / Server | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop / Server |
| Compatible Systems | N/A | N/A | Workstation | Rack Server / Tower Server / Blade Server / Workstation / N/A | Tower Server / Workstation |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 1600 MHz | 2900 MHz | 3200 MHz | 3200 MHz | 2933 MHz |
| Operating Temperature | 0°C to 85°C | N/A | N/A | N/A | N/A |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL11 | CL16 | CL16 | CL16 | CL16 |
| Voltage | 1.5V | 1.35V | 1.35V | 1.35V | 1.2V |
| 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 | N/A | N/A | Intel 13th Gen | Intel 13th Gen | Intel 13th Gen |
| AMD Platform Support | N/A | N/A | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 |
| Use Case | General Use | Workstation | Gaming / Workstation / Server | Server | Workstation |
| Product Name | MEM-2900-512U1.5GB | MEM-2900-512U1GB | MEM-2951-512U1.5GB Memory Module | MEM-2951-512U1GB | MEM-2900-512MB= |
| Height | 1.5 inches | N/A | 1.4 inches | 1.18 inches | 1.2 inches |
| Width | 5.3 inches | N/A | 5.3 inches | 5.25 inches | 5.3 inches |
| Depth | 0.5 inches | N/A | 0.5 inches | 0.36 inches | 0.5 inches |
| Weight | 0.45 lbs | N/A | 0.3 lbs | 0.3 lbs | 0.2 lbs |
Reviews & Ratings
G
George Linton
5
Cisco memory met expectations.
H
Harvey Knox
4
Stable performance after upgrade.
I
Isaac Morton
5
Good mid range memory option.
J
Jonah Pierce
5
Worked perfectly in our ISR 2911.
Questions & Answers
What is the MEM-2900-512U1.5GB upgrade kit?
The MEM-2900-512U1.5GB upgrade kit enhances Cisco 2901 and 2921 routers by adding 1GB and 512MB DRAM modules to expand memory from 512MB to 1.5GB.
Which Cisco models are compatible with MEM-2900-512U1.5GB?
The MEM-2900-512U1.5GB kit is fully compatible with Cisco ISR 2901 and 2921 router series running Cisco IOS.
How does upgrading to 1.5GB DRAM improve router performance?
Increasing DRAM to 1.5GB enables higher throughput, supports advanced features, and prevents memory-related bottlenecks under heavy network loads.
Is the MEM-2900-512U1.5GB installation process straightforward?
Yes. Installation requires removing the router cover, seating the new 1GB and 512MB modules in the DRAM slots, and rebooting for automatic memory recognition.
Do I need a software update after installing this memory upgrade?
No software update is required; Cisco IOS automatically detects and utilizes the expanded DRAM on reboot.
Are these DRAM modules genuine Cisco parts?
Yes. MEM-2900-512U1.5GB modules are manufactured to Cisco specifications and carry the same quality and reliability as OEM components.
What warranty covers the MEM-2900-512U1.5GB kit?
This upgrade kit includes a one-year warranty covering defects in materials and workmanship, with optional extended warranty plans available.
How do I verify that my router recognizes the new 1.5GB memory?
After reboot, enter the 'show memory summary' command in the Cisco IOS CLI to confirm total DRAM of 1536MB.
Can I revert to the original 512MB configuration after upgrade?
Yes. Simply power down the router, remove the added modules, and reinstall the original 512MB DRAM module.
Will upgrading to 1.5GB DRAM support advanced security features?
Yes. Additional DRAM ensures sufficient resources for IOS security features such as VPN acceleration, firewall, and IPS.
What are the technical specifications of MEM-2900-512U1.5GB?
The kit includes one PC3-10600 DDR3 1GB module and one PC3-10600 DDR3 512MB module, both rated at 1333 MHz with CL9 latency.
How long does shipping take for the MEM-2900-512U1.5GB upgrade kit?
We offer standard 3–5 business day shipping and expedited options to deliver the MEM-2900-512U1.5GB kit promptly.
Does the memory upgrade affect my Cisco IOS licensing?
No. Increasing DRAM does not change your existing IOS license; you retain all current feature sets and entitlements.
Are there any compatibility issues with specific IOS versions?
MEM-2900-512U1.5GB is compatible with all Cisco IOS versions supported on ISR 2901 and 2921 routers without known conflicts.
What benefits can I expect after upgrading my Cisco 2901 to 1.5GB RAM?
Expect faster packet processing, support for larger routing tables, improved VPN performance, and enhanced reliability under peak loads.
What is the return policy for the MEM-2900-512U1.5GB kit?
We offer a 30-day return window on unused, undamaged kits with full refund, minus shipping fees, upon receipt of the original packaging.