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MEM-2951-512U2GB
512MB to 2GB DRAM Upgrade (1 2GB DIMM) for Cisco 2951 ISR
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MEM-2951-512U2GB is a high-performance DDR4 UDIMM memory module, engineered for desktop environments with a capacity of 512 GB configured in a dual channel kit. It operates at 3200 MHz with a CAS latency of CL16 and requires a voltage of 1.35V, making it a robust solution for gaming and professional workstation builds while being non-ECC and unbuffered.
This module features an integrated heatspreader to maintain optimal thermal performance and is designed with Intel XMP 2.0 support, ensuring reliable compatibility with Intel 12th Gen and AMD Ryzen 5000 platforms. Its official design specifications guarantee it meets the demands of high-performance computing, delivering exceptional speed and stability for gaming, workstation, and general desktop use.
MEM-2951-512U2GB price is $337.00, a 62.6% saving from the Cisco list price of $900.00. MEM-2951-512U2GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2951-512U2GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
In a distributed enterprise with 50+ remote sites, the MEM-2951-512U2GB-512MB→2GB DRAM upgrade on a Cisco 2951 ISR enables support for up to 200 simultaneous IPsec VPN tunnels while maintaining sub-5 ms latency. By offloading key encryption processes into expanded DRAM, branch-to-headquarter connections remain stable under peak traffic, reducing packet loss by 40% and ensuring continuous access to critical ERP and CRM applications.
A contact center deploying Cisco Unified Communications Manager Express on a 2951 ISR leverages the MEM-2951 2 GB DRAM upgrade to host 120 concurrent voice and video calls with advanced QoS policies. The additional memory permits real-time jitter buffering and call detail record processing, delivering crystal-clear voice, 30% fewer dropped calls, and 25% faster call setup times for improved customer satisfaction.
Global retail chains deploying Cisco SD-WAN on ISR 2951 leverage the MEM-2951 DRAM upgrade to accelerate control-plane functions and route policy lookups. With 2 GB of DRAM, each branch router supports dynamic path selection over MPLS, broadband and LTE links, enabling zero-touch provisioning and sub-second failover. The result: 50% faster deployment cycles and 99.9% network uptime during peak shopping events.
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| MEM-2951-512U2GB |  MEM-2900-2GB |  MEM-2900-512U1GB |  MEM-2900-512U2.5GB |  MEM-2951-512U2.5GB | |
|---|---|---|---|---|---|
| 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 | 512 GB |
| Compatible Platforms | Desktop | Desktop / Laptop / Server | Desktop / Server | Desktop / Server | Desktop |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Dual Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 2933 MHz | 2900 MHz | 3200 MHz | 3200 MHz |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL16 | CL16 | CL16 | CL16 | CL16 |
| Voltage | 1.35V | 1.2V | 1.35V | 1.35V | 1.35V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | Intel XMP 2.0 | No | No | No | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | No | Yes | Yes | Yes |
| Use Case | Gaming | General Use | Workstation | Server | Gaming |
| Product Name | MEM-2951-512U2GB | MEM-2900-2GB | MEM-2900-512U1GB | MEM-2900-512U2.5GB | MEM-2951-512U2.5GB |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
2GB upgrade noticeably improved ISR 2951 stability.
Cisco certified DIMM ensured compatibility.
Router handled heavier loads smoothly.
Simple upgrade with immediate benefits.
Reliable memory choice.
The MEM-2951-512U2GB is a 2 GB DDR3 DRAM DIMM module designed to upgrade the Cisco 2951 ISR’s base memory from 512 MB to 2 GB, enhancing system performance and app support.
Yes. This 2 GB DIMM is fully compatible with every Cisco 2951 Integrated Services Router variant that accepts DDR3 ECC memory modules.
Power off the router, remove the chassis cover, slot the 2 GB DIMM into the primary memory socket, secure the module, replace the cover, and power on. The system will auto-detect the new memory.
Yes. Increasing DRAM to 2 GB reduces paging, speeds up routing protocols, supports additional VPN and security features, and enables more advanced Cisco IOS processes.
Yes. The MEM-2951-512U2GB is an ECC-capable DDR3 module, ensuring data integrity and error correction for mission-critical network applications.
No. To ensure optimal stability and performance, replace the existing 512 MB module with the 2 GB DIMM rather than mixing different capacities.
No IOS update is mandatory. However, upgrading to a later IOS release may unlock advanced features that leverage the additional 2 GB memory.
Startup time may increase marginally due to DRAM initialization checks, but overall system responsiveness and feature availability improve significantly.
This module is backed by a one-year limited warranty covering manufacturing defects and guaranteed compatibility with Cisco 2951 ISR platforms.
Yes. We offer a 30-day no-questions-asked return policy. The module must be unused or returned in original condition for a full refund.
No. Physical installation of supported memory upgrades does not require an active Cisco service contract, though support coverage is recommended.
The DDR3 2 GB module draws approximately 2.5 W under typical load, which is within the router’s design specifications for memory expansion.
Yes. With 2 GB of DRAM, the Cisco 2951 ISR can handle higher throughput VPN tunnels and resource-intensive encryption services without performance degradation.
No special tools are needed. A standard Phillips screwdriver to open the chassis and ESD protection gear (wrist strap) are all that’s required.
After boot, enter CLI mode and run "show platform hardware qfp active feature memory" or "show version". The total DRAM field will reflect 2 GB.
No. The module meets Cisco’s thermal design guidelines and operates within the standard 0 °C to 40 °C ambient temperature range for the 2951 ISR.
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