Cisco Compatible MEM3800-512D
512MB DIMM DDR DRAM for the Cisco 3800 Series
Product Highlights
As Cisco IOS software evolves and feature sets grow in complexity, the default 256MB of DRAM in Cisco 3800 Series routers can quickly become a bottleneck — limiting your ability to run advanced security, voice, and routing services simultaneously.
The MEM3800-512D is a 512MB DDR DRAM DIMM module designed specifically for the Cisco 3800 Series Integrated Services Routers, including the Cisco 3825 and Cisco 3845. This ECC DDR PC-2700 memory module installs directly into one of the router's two available DIMM slots, providing the additional system memory needed to support advanced Cisco IOS feature sets such as Advanced Security, Advanced Enterprise Services, and IP Communications.
Cisco 3800 Series routers store running configurations, routing tables, and packet buffers in main DRAM memory. Upgrading to 512MB per DIMM allows network administrators to deploy multiple concurrent services — including firewall, VPN, intrusion prevention, and voice call processing — without running into memory constraints. This Cisco compatible module is manufactured and tested to meet or exceed OEM specifications, offering a cost-effective path to extending the operational life of your Cisco 3800 investment.
Ideal for branch office and enterprise environments where the Cisco 3800 continues to serve as a reliable integrated services platform, this memory upgrade helps ensure your router can handle current and future IOS requirements.
Features & Benefits
512MB DDR DRAM Capacity
This module provides 512MB of ECC DDR SDRAM in a single DIMM, doubling the factory-default 256MB configuration. The additional memory enables your Cisco 3800 router to run larger IOS images and support more concurrent services such as VPN, firewall, and voice processing without performance degradation.
ECC Error-Correcting Code
Built with ECC (Error-Correcting Code) technology, this DRAM module automatically detects and corrects single-bit memory errors. This is critical for always-on routing platforms where data integrity directly impacts network reliability and uptime.
Cisco 3800 Series Compatibility
Engineered specifically for the Cisco 3825 and Cisco 3845 Integrated Services Routers. The 184-pin DDR DIMM form factor ensures a precise physical and electrical fit in the router's memory slots. No firmware changes or additional licensing are required to use this module.
Cost-Effective Cisco Compatible
As a Cisco compatible third-party module, the MEM3800-512D delivers the same performance and reliability as OEM memory at a significantly lower price point. This makes it an ideal choice for extending the life of EOL platforms without overspending on original Cisco-branded components.
Deployment Scenarios
Branch Office Integrated Services Router
Branch offices running converged voice, data, and security services on a Cisco 3825 or 3845 require sufficient DRAM to handle advanced IOS feature sets. Upgrading to 512MB per DIMM ensures the router can support IP telephony (SRST/CME), VPN tunnels, and firewall services concurrently without memory exhaustion.
IOS Software Upgrade Enablement
Later Cisco IOS releases for the 3800 Series often require more DRAM than the factory default. Installing the MEM3800-512D allows administrators to upgrade to newer, more secure IOS versions that demand higher minimum memory, keeping the router compliant with current security patches and features.
Lab and Training Environments
Network engineers maintaining Cisco 3800 routers in CCIE lab or training environments benefit from maximum memory to load full enterprise-grade IOS images. The 512MB DIMM supports the advanced feature sets commonly used in certification study and proof-of-concept testing.
General
Memory Specifications
Physical
Compatibility
Compatibility Notes
Compatible Platforms
- Cisco 3825 Integrated Services Router
- Cisco 3845 Integrated Services Router
Memory Slot Information
The Cisco 3800 Series routers have two DIMM slots for main system memory. Each slot accepts 128MB, 256MB, or 512MB DDR SDRAM DIMMs. The MEM3800-512D is a single 512MB DIMM that occupies one slot.
Important Notes
- The Cisco 3800 Series (C3800) has reached End-of-Life (EOL) status. This memory module is intended for maintaining and extending existing deployments.
- Advanced IOS feature sets and images may require additional memory beyond the factory default. Consult the Cisco Software Advisor for specific IOS image memory requirements.
- The router must be powered off before installing or removing DIMM modules.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| MEM3800-512D= | Cisco OEM 512MB DRAM for 3800 | Original Cisco-branded version of the same 512MB DDR DRAM DIMM; higher cost but carries the Cisco brand. |
| MEM3800-256U512D | 256 to 512MB DRAM Factory Upgrade for 3800 | Factory upgrade kit that increases total system DRAM from 256MB to 512MB; intended for BTO configurations. |
| MEM3800-512U768D | 512 to 768MB DRAM Factory Upgrade for 3800 | Factory upgrade kit that increases total system DRAM from 512MB to 768MB for heavier IOS feature sets. |
| MEM3800-512U1024D | 512 to 1024MB DRAM Factory Upgrade for 3800 | Factory upgrade kit that increases total system DRAM from 512MB to 1024MB — maximum supported configuration. |
