MEM-2951-512U4GB, Cisco MEM-2951-512U4GB, DRAM Upgrade, 4GB capacity/2x2GB DIMM/For 2951 ISR

  • Brand: Cisco
  • Model: MEM-2951-512U4GB
List Price: $1,200.00
50% OFF
$600.00
  • 100% Genuine
    100% Genuine
    Original, factory-verified
    3-Year Warranty
    3-Year Warranty
    Extended, enterprise-grade
    23 Years Expertise
    24 Years Expertise
    Proven, deployment-focused
  • Condition
    • Original New · Covered SN
    Express Shipping to United States Get Shipping Estimate
    Estimated shipping time: 2–6 business days via DHL, FedEx, UPS and more
    expert
    Certified Expertise Builds Trust
    CCIE · JNCIE · NSE7 · ACDX · HPE Master ASE · Dell Server/AI Expert
    • Faster Delivery, Globally Ready

      Faster Delivery, Globally Ready

      20+ years of supply chain expertise for faster multi-stop delivery with smooth customs.

      48H Worldwide Shipping
      10+ Global Warehouses
    • Keep Projects On Time

      Keep Projects On Time

      Reliable availability and real-time shipment visibility to keep every critical IT project on schedule.

    • Leading Global Distributor Since 2002

      Leading Global Distributor
      Since 2002

      A global ICT bridge delivering authentic hardware and trusted service for over 20 years.

        21500+ Enterprise Clients Served200+ Countries & Regions Covered
    • Worry-Free Coverage with RSCare

      Worry-Free Coverage with RSCare

      3-Year warranty for enterprise hardware, including advanced RMA, diagnostics, spare parts support, and OEM service compatibility.

      Cisco SmartNet
      HPE Foundation Care
      Dell ProSupport
      Juniper Care
      Fortinet Support
    • Your Trusted Genuine Source

      Your Trusted Genuine Source

      Authorized partnerships with 30+ brands, including Cisco, HPE, Dell, Juniper, and Fortinet.

      100% Authentic Products
      100,000+ Multi-Brand SKUs Available
    Overview

    Cisco MEM-2951-512U4GB Overview

    The Cisco MEM-2951-512U4GB is an enterprise-grade DRAM Upgrade designed to boost the performance of Cisco 2951 ISR routers. This 4GB DDR2 SDRAM kit, delivered as 2 x 2GB DIMM modules, extends the original 512MB to 4GB, enabling heavier routing tables, richer security services, and branch virtualization. With 800MT/s data transfer rate, 1.8V low-power operation, and Non-ECC unbuffered design, this DIMM solution is ideal for service providers, regional integrators, and end users across Asia, Europe, Africa, and North America seeking a reliable Cisco memory upgrade for demanding enterprise networking workloads.

    Product Highlights

    4GB
    DRAM Capacity
    512MB-4GB
    Upgrade Range
    800MT/s
    Data Rate

    Product Applications Scenarios

    Enterprise Network
    Upgrading to 4GB DRAM on Cisco 2951 ISR enhances routing, QoS, and security services, reducing latency and improving user experience for branch and campus networks.
    Cloud Services
    Additional memory allows 2951 ISR routers to handle VPN, tunneling, and cloud on-ramp features more efficiently, cutting service disruption and boosting throughput.
    Service Providers
    Service providers can scale customer CPE services on Cisco 2951 ISR with higher DRAM, improving policy enforcement and session capacity while simplifying rollout.

    Product Features Comparison

      Cisco Cisco Cisco Cisco
    Model MEM-2951-512U4GB MEM-2951-512U2.5GB MEM-2951-512U1.5GB MEM-2951-512U2GB
    Brand Cisco Cisco Cisco Cisco
    Capacity 4GB 2.5GB (2GB + 512MB) 512MB to 1.5GB 2GB
    Memory Type DRAM DRAM SDRAM DIMM
    Frequency 800MT/s DDR2-800/PC2-6400 DDR3 n/a
    Voltage 1.8V 1.8V 1.5V n/a
    Device Compatibility Cisco 2951 ISR Cisco 2951 ISR Cisco 2951 ISR Cisco 2951 ISR

    Optional Add-ons

    Model Number Description
    MEM-2951-512MB= Cisco 2951 ISR base 512MB DRAM DIMM spare for maintenance or rollback configurations.
    MEM-2951-512U2GB Cisco 2951 ISR DRAM Upgrade to 2GB, single 2GB DIMM for intermediate capacity needs.
    MEM-CF-4GB= Cisco 4GB Compact Flash storage module for ISR 1900/2900/3900 IOS images and logs.

    Quality Certifications

    • ISO 14001
    • ISO 9001
    • RoHS
    • REACH
    • CE
    • FCC
    Specification

    Cisco MEM-2951-512U4GB Specification

    Model
    MEM-2951-512U4GB
    Brand
    Cisco
    Model Name
    MEM-2951-512U4GB
    Product Type
    DRAM Upgrade
    Capacity
    4GB
    Memory Type
    DRAM
    Module Configuration
    2 x 2GB DIMM
    Compatibility
    Cisco 2951 ISR
    Upgrade Path
    512MB to 4GB
    Technology
    DDR2 SDRAM
    Form Factor
    DIMM
    Data Transfer Rate
    800MT/s
    Voltage
    1.8V
    Dimensions
    133.35mm x 30mm
    Compatibility
    Non-ECC
    Latency
    CL6
    Operating Temperature Range
    0??C to 70??C
    Storage Temperature Range
    -40??C to 85??C
    Package Type
    Retail
    Compliance
    RoHS
    Signal Processing Technology
    Unbuffered
    Application
    Enterprise Networking
    Weight
    0.25 kg

    Get more information

    Discover unbeatable prices and fast shipping for the MEM-2951-512U4GB, Cisco MEM-2951-512U4GB, DRAM Upgrade, 4GB capacity/2×2GB DIMM/For 2951 ISR . Access the detailed MEM-2951-512U4GB, Cisco MEM-2951-512U4GB, DRAM Upgrade, 4GB capacity/2×2GB DIMM/For 2951 ISR datasheet and ensure you're getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via live chat or email us at [email protected].

    Quality Certifications

    Need Help? Technical Experts Available Now.

    • +1-626-655-0998 (USA)
      UTC 15:00-00:00
    • +852-2592-5389 (HK)
      UTC 00:00-09:00
    • +852-2592-5411 (HK)
      UTC 06:00-15:00
    Need Help? Technical Experts Available Now.
    Q&A

    Questions & Answers

    What accessories are available with it?

    Generally, it comes with the DIMMs themselves; additional accessories are usually unnecessary.

    How does it compare with other similar products?

    Compared to others, it provides a faster upgrade path specific to Cisco 2951 ISR routers.

    How to use the MEM-2951-512U4GB in a router?

    Install the DIMMs, boot the router, and the system will utilize the additional memory immediately.

    Are the products sold on router-switch.com authentic?

    Yes, router-switch.com only sells 100% genuine products from authorized brands. As a multi-brand authorized distributor, all items are sourced through official channels and include valid manufacturer warranties. Customers may verify authorization via brand websites or request certification documents.

    Warranty
    • Your Trusted Global ICT Partner

      Delivering reliable, cross-border fulfillment with 20+ years of expertise, backed by rigorous QC, fast logistics, and worldwide warehousing.
      Global warehousing
      Global warehousing
      10+ hubs positioned for fast international dispatch and stable availability.
      Seamless cross-border
      Seamless cross-border
      QC-verified packing and predictable delivery via FedEx, DHL, UPS.
      Your Trusted Global ICT Partner
    • ICT Tools Hub for Confident Monitoring

      ICT Tools Hub for Confident Monitoring

      Stay informed on product lifecycle status and real-time inventory availability—supporting confident planning, sourcing, and operational execution.
      EOL/EOSL Checker
      Verify product lifecycle status to plan purchases and avoid EOL/EOSL risks.
      Request VIP Inventory Portal Access
      Connect via live chat for VIP access to real-time inventory on priority SKUs.
    • Certified Experts Across Leading Vendors

      Professional guidance for network, security & data center builds, delivered by certified experts with extensive, hands-on deployment experience.
      Multi-vendor engineering
      Multi-vendor engineering
      Certified expertise across Cisco, HPE, Aruba, Dell, Juniper, Huawei and Fortinet.
      Deployment-ready guidance
      Deployment-ready guidance
      Faster, safer rollouts with project-focused engineering guidance.
      Certified Experts Across Leading Vendors

    The Choice of 21,500 +Global Customers

    • Ford
    • Disney
    • Nestle
    • Toyota
    • Walmart
    • Philips
    • Ups
    • Huatt
    • Hsbc
    • Novartis
    • Siemens Healthineers
    • Bt
    • Reference Johnson
    • T
    • Att
    • Lgu
    • Sk Telecom
    • Veerizon
    Industry-Leading Warranty Coverage You Can Trust
    • 100% Low Price Guarantee
      100% Low Price Guarantee
      Router-switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
    • 100% Quality Assurance
      100% Quality Assurance
      All items are brand new, original, and factory-sealed.
      Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
    • 100% Money-Back Guarantee
      100% Money-Back Guarantee
      If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly.
      Visit Return Policy page for more information.
    • Free Cisco CCIE Technical Support
      Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
    • Flexible & Secure Payment and Shipping
      Flexible & Secure Payment and Shipping
      We support multiple secure payment and logistics options, backed by industry-leading verification:
      • Pay by wire transfer.
      • Pay with your paypal.
      • Pay with your Visa credit card.
      • Pay with your Mastercard credit card.
      • Pay with your Discover Card.
      • Pay by American Express.
      More
      • mcafee-secure
      • verisign-secured
      • pci-dss
      • ssl-encryption
      Visit How to Pay page for more information
    Warranty Coverage & RMA Instructions
    • Extended, Worry-Free Warranty Coverage
      Extended, Worry-Free Warranty Coverage
      • Factory New Sealed Enterprise Hardware: 3 Years
      • Factory New Sealed Consumer Devices: 1 Year
      Visit Warranty Policy page for more information
    • How to Get Support
      How to Get Support
      If you encounter issues with products, please reach out to your dedicated sales representative. They will assist with diagnostics, remote troubleshooting, and RMA processing if necessary.
      Visit Contact Us page for more support options.

    Best-Fit Solutions for Your Network

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Expert-configured AI solution: Same power, 90% savings—multi-scenario flexibility with Dell/Huawei/Lenovo options.

    AI
    Beyond Bandwidth: The 100G+ Data Center Architecture

    Beyond Bandwidth: The 100G+ Data Center Architecture

    The must-have 100G foundation - AI-ready growth, zero-latency performance

    Data Center
    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    High-Profit data center switches from Cisco, Huawei, Mellanox & Juniper.

    Ethernet Switch
    Download