United States$5,000,000+
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A
Alan Prescott
5
1GB upgrade helped improve router responsiveness.
MEM-2951-512U1GB
512MB to 1GB DRAM Upgrade (1 1GB DIMM) for Cisco 2951 ISR
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MEM-2951-512U1GB
- Description:
- 512MB to 1GB DRAM Upgrade (1 1GB DIMM) for Cisco 2951 ISR
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 11411537153
- Condition:
- Warranty:
- 3
- List Price:
$600.00
- Price:
$240.0060% off
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1
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MEM-2951-512U1GB Overview
MEM-2951-512U1GB is a high-performance DDR4 UDIMM that runs at 3200 MHz with a tight CAS latency of CL16 and an operating voltage of 1.35V. It is offered as a single channel kit with a module capacity of 512 GB, built using non-ECC and unbuffered technology.
MEM-2951-512U1GB is designed for versatile compatibility across desktop, laptop, and server platforms, and it includes an integrated heatspreader for improved thermal management without RGB lighting. This memory solution is ideally suited for server builds where stability and efficiency are critical.
MEM-2951-512U1GB price is $240.00, a 60% saving from the Cisco list price of $600.00. MEM-2951-512U1GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2951-512U1GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
MEM-2951-512U1GB Specifications
- Weight
- 0.3 lbs
- Height
- 1.18 inches
- Operating Temperature
- N/A
- Depth
- 0.36 inches
- Use Case
- Server
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Compatible Platforms
- Desktop / Laptop / Server
- 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
- AMD Platform Support
- AMD Ryzen 5000
- Kit Configuration
- Single Channel
- Compatible Systems
- Rack Server / Tower Server / Blade Server / Workstation / N/A
- Width
- 5.25 inches
- XMP Support
- No
- Capacity
- 512 GB
- Intel Platform Support
- Intel 13th Gen
- Product Name
- MEM-2951-512U1GB
MEM-2951-512U1GB Use Case
Enhanced VPN Throughput for Secure Branch Office Connectivity
In a multi‐site enterprise deploying hundreds of IPsec VPN tunnels on Cisco 2951 ISR routers, the MEM-2951-512U1GB-512MB to 1GB DRAM Upgrade (1 1GB DIMM) delivers the extra memory headroom needed for concurrent encryption, decryption and packet buffering. By upgrading to 1 GB of DRAM, network teams can sustain 200+ VPN sessions at wire-rate performance, reduce packet drops under peak loads and simplify compliance with PCI DSS and HIPAA encryption mandates. Outcome: Secure, high-performance branch connectivity with sub-millisecond latency and zero session failures.
Scalable Unified Communications and Video Collaboration
A regional service provider hosting Cisco Unified Communications Manager (CUCM) clusters at branch sites leverages Cisco 2951 ISR with MEM-2951-512U1GB-512MB to 1GB DRAM Upgrade to support up to 1,000 SIP registrations and 200 simultaneous video streams per router. The DRAM upgrade enables advanced call control features, transcoding and QoS policy enforcement in hardware, avoiding CPU bottlenecks. Outcome: Seamless HD voice/video calls, accelerated feature rollout and 30% reduction in call setup times—boosting productivity and customer satisfaction.
Optimized SD-WAN and Cloud Application Acceleration
In a distributed enterprise migrating critical workloads to AWS and Azure, IT architects deploy Cisco 2951 ISR as SD-WAN edge devices. The MEM-2951-512U1GB-512MB to 1GB DRAM Upgrade unlocks deep packet inspection, application-aware routing and dynamic path selection across multiple links. With increased memory buffers, the router sustains thousands of simultaneous TCP/UDP flows and accelerates SaaS traffic via Cloud OnRamp. Outcome: 40% improvement in cloud app response times, consistent user experience and lower WAN costs through intelligent path utilization.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 MEM-2951-512U1GB |  MEM-2951-512U2.5GB |  MEM-2900-512U2.5GB |  MEM-2951-512U1.5GB |  MEM-2900-2GB= | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 512 GB | 512 GB | 512 GB | 512 GB | 2 GB |
| Compatible Platforms | Desktop / Laptop / Server | Desktop | Desktop / Server | Desktop / Laptop / Server | Desktop / Laptop / Server |
| Compatible Systems | Rack Server / Tower Server / Blade Server / Workstation / N/A | N/A | Rack Server | 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 | 3200 MHz | 3200 MHz | 3200 MHz | 2933 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 | CL16 |
| Voltage | 1.35V | 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 | Intel XMP 2.0 | No | Intel XMP 2.0 | No |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | No |
| Intel Platform Support | Intel 13th Gen | Intel 12th Gen | Intel Xeon Scalable | Intel 13th Gen | Intel 10th Gen |
| AMD Platform Support | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD EPYC | AMD Ryzen 5000 | AMD Ryzen 5000 |
| Use Case | Server | Gaming | Server | Gaming / Workstation / Server | General Use |
| Product Name | MEM-2951-512U1GB | MEM-2951-512U2.5GB | MEM-2900-512U2.5GB | MEM-2951-512U1.5GB Memory Module | MEM-2900-2GB= |
| Height | 1.18 inches | 1.2 inches | 1.2 inches | 1.4 inches | 1.18 inches |
| Width | 5.25 inches | 5.3 inches | 5.3 inches | 5.3 inches | 5.25 inches |
| Depth | 0.36 inches | 0.6 inches | 0.3 inches | 0.5 inches | 0.12 inches |
| Weight | 0.3 lbs | 0.2 lbs | 0.5 lbs | 0.3 lbs | 0.2 lbs |
Reviews & Ratings
B
Benjamin Ortiz
4
Cisco memory delivered consistent performance.
C
Charles Denton
5
Smooth installation process.
D
Dominic Reyes
3
Good entry level upgrade.
E
Evan Foster
4
Reliable memory for branch routers.
Questions & Answers
What is the MEM-2951-512U1GB module?
The MEM-2951-512U1GB is a 1GB DRAM upgrade module designed to expand memory from 512MB to 1GB on Cisco 2951 Integrated Services Routers.
Is the MEM-2951-512U1GB compatible with Cisco 2951 ISR?
Yes, the MEM-2951-512U1GB is fully compatible with all Cisco 2951 Integrated Services Router models.
What performance benefits does upgrading to 1GB DRAM provide?
Upgrading to 1GB DRAM improves routing performance, supports enhanced security features, and enables higher throughput and more concurrent sessions.
How do I install the 1GB DIMM in a Cisco 2951 router?
Power off the router, remove the chassis cover, insert the 1GB DIMM into the DRAM slot until it clicks, replace the cover, and power on the router.