United States$5,000,000+
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Aaron Whitfield
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Upgrade allowed additional services to run smoothly.
MEM-2900-512U2.5GB
512MB to 2.5GB DRAM Upgrade (2GB+512MB) for Cisco 2901-2921
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Name:
MEM-2900-512U2.5GB
- Description:
- 512MB to 2.5GB DRAM Upgrade (2GB+512MB) for Cisco 2901-2921
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 11411535517
- Condition:
- Warranty:
- 3
- List Price:
$606.99
- Price:
$315.6448% off
Quantity:
1
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MEM-2900-512U2.5GB Overview
MEM-2900-512U2.5GB is a high-performance DDR4 UDIMM engineered for demanding server and desktop environments. With a rated speed of 3200 MHz, a CAS latency of CL16, and an operating voltage of 1.35V, this non-ECC, unbuffered memory module delivers consistent performance for critical server builds while its integrated heatspreader ensures reliable thermal management even under sustained loads.
Designed for compatibility with both desktop and server platforms, MEM-2900-512U2.5GB comes in a single-channel kit configuration and supports Intel Xeon Scalable and AMD EPYC systems. Built without RGB lighting to focus on performance and reliability, this memory module is ideally suited for server applications where stability, speed, and efficient heat dissipation are essential.
MEM-2900-512U2.5GB price is $315.64, a 48% saving from the Cisco list price of $606.99. MEM-2900-512U2.5GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2900-512U2.5GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
MEM-2900-512U2.5GB Specifications
- Weight
- 0.5 lbs
- Height
- 1.2 inches
- Width
- 5.3 inches
- Depth
- 0.3 inches
- Operating Temperature
- N/A
- Use Case
- Server
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Form Factor
- UDIMM
- Speed
- 3200 MHz
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- Voltage
- 1.35V
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Kit Configuration
- Single Channel
- Compatible Platforms
- Desktop / Server
- Compatible Systems
- Rack Server
- XMP Support
- No
- Intel Platform Support
- Intel Xeon Scalable
- AMD Platform Support
- AMD EPYC
- Capacity
- 512 GB
- Product Name
- MEM-2900-512U2.5GB
MEM-2900-512U2.5GB Use Case
Scalable Unified Communications with MEM-2900-512U2.5GB DRAM Upgrade for Cisco 2901-2921
In a 200-user branch office running Cisco Unified Communications Manager on a Cisco 2901, the MEM-2900-512U2.5GB to 2.5GB DRAM Upgrade eliminates voice jitter and one-way audio during peak conferencing sessions. By expanding to 2.5 GB of DRAM, the router buffers high-volume RTP streams, supports 150+ concurrent calls, and unlocks advanced video and collaboration features. Outcome: 30% fewer dropped calls, crystal-clear audio/video quality, and future-proof UC performance.
High-Throughput Security and Threat Defense via 2.5 GB DRAM for Cisco 2921
A retail chain deploys Cisco 2921 routers with ASA firewall modules at 50+ locations. Upgrading with MEM-2900-512U2.5GB-512MB to 2.5 GB DRAM enables deep packet inspection, SSL decryption, and multi-context VPNs without throughput degradation. Result: firewall throughput rises by 40%, threat-signature updates process in real time, and PCI-DSS compliance is maintained under peak shopping loads.
Accelerated Site-to-Site and Remote VPN at 2.5 GB DRAM on Cisco 2901
An engineering firm uses Cisco 2901 routers for 100+ IPsec tunnels connecting global R&D centers. Installing the MEM-2900-512U2.5GB DRAM upgrade boosts encryption/decryption buffers, eliminating CPU stalls during high-volume key exchanges. Benefit: VPN throughput doubles to 200 Mbps, latency drops by 25%, and remote teams experience uninterrupted, low-lag access to CAD and SCM systems.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 MEM-2900-512U2.5GB |  MEM-2900-512U1GB |  MEM-2951-512U4GB |  MEM-2951-512U1.5GB |  MEM-2900-1GB= | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR3 |
| Capacity | 512 GB | 512 GB | 4 GB | 512 GB | 1 GB |
| Compatible Platforms | Desktop / Server | Desktop / Server | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop |
| Compatible Systems | Rack Server | N/A | 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 | 2900 MHz | 3200 MHz | 3200 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 | CL16 | CL16 | CL16 | CL11 |
| Voltage | 1.35V | 1.35V | 1.35V | 1.35V | 1.5V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | No | No | 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 Xeon Scalable | N/A | Intel 10th Gen | Intel 13th Gen | N/A |
| AMD Platform Support | AMD EPYC | N/A | AMD Ryzen 5000 | AMD Ryzen 5000 | N/A |
| Use Case | Server | Workstation | Gaming / Workstation | Gaming / Workstation / Server | General Use |
| Product Name | MEM-2900-512U2.5GB | MEM-2900-512U1GB | MEM-2951-512U4GB | MEM-2951-512U1.5GB Memory Module | MEM-2900-1GB= |
| Height | 1.2 inches | N/A | 1.2 inches | 1.4 inches | 1.2 inches |
| Width | 5.3 inches | N/A | 5.3 inches | 5.3 inches | 5.3 inches |
| Depth | 0.3 inches | N/A | 0.5 inches | 0.5 inches | 0.2 inches |
| Weight | 0.5 lbs | N/A | 0.3 lbs | 0.3 lbs | 0.15 lbs |
Reviews & Ratings
B
Blake Thornton
4
Cisco memory delivered stable performance.
C
Connor Reeves
5
Installation was quick and simple.
D
Dylan Harper
3
Good memory expansion for ISR 2900.
E
Elliot Parsons
4
Reliable upgrade option.
Questions & Answers
What is the MEM-2900-512U2.5GB DRAM upgrade?
The MEM-2900-512U2.5GB is a 512MB to 2.5GB DRAM memory upgrade kit that enhances Cisco 2901, 2911, and 2921 router performance by adding 2GB of verified DRAM.
Which Cisco router models are compatible with this upgrade?
This DRAM upgrade is fully compatible with Cisco Integrated Services Routers 2901, 2911, and 2921 running standard Cisco IOS.
How does the MEM-2900-512U2.5GB improve router performance?
By increasing total system memory from 512MB to 2.5GB, the upgrade supports more simultaneous processes, faster packet handling, and improved throughput.
What components are included in the upgrade kit?
The kit includes a factory-tested 2GB DRAM module, installation instructions, and ESD-safe packaging for safe handling.