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MEM-2900-512U1.5GB
UPG 512MB TO 1.5GB DRAM 1GB+512MB FOR CISCO 2901-2921
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MEM-2900-512U1.5GB is a DDR3 UDIMM memory module operating at 1600 MHz with a CAS latency of CL11 and a standard voltage of 1.5V. Designed as a single channel kit, it is non-ECC and unbuffered, ensuring reliable compatibility with desktop systems while incorporating an integrated heatspreader for effective thermal management and no RGB lighting.
This module features a compact design optimized for efficient airflow and stable performance in various computing environments, including gaming, workstation, and general use builds. Its precise engineering and dimensions make it a dependable choice for users seeking balanced performance and durability in their desktop applications.
MEM-2900-512U1.5GB price is $314.00, a 47.7% saving from the Cisco list price of $600.00. MEM-2900-512U1.5GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2900-512U1.5GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
By installing the MEM-2900-512U1.5GB-UPG on Cisco 2901-2921 routers at distributed sites, IT teams expand DRAM to 1.5 GB, sustaining high-performance IPsec and SSL VPN tunnels under heavy concurrency. Organizations benefit from up to 50% faster encrypted throughput, reduced latency, and consistent remote access stability—boosting productivity and securing critical business data.
Equipping Cisco 2901 routers with the MEM-2900-512U1.5GB-UPG empowers UC Manager Express deployments to support larger call volumes, advanced voicemail and conferencing features. The memory upgrade delivers a 60% capacity increase in active endpoints, superior call quality under peak load, and simplified administration—enabling seamless collaboration and a future-proof communications platform.
Upgrading to 1.5 GB DRAM via MEM-2900-512U1.5GB-UPG on Cisco ISR 2901-2921 routers unlocks full Zone-Based Firewall, IPS and Application Visibility & Control capabilities without memory constraints. Security teams can deploy larger ACL sets, deeper packet inspections, and real-time threat feeds, resulting in robust perimeter defense, compliance readiness, and up to 40% improved threat-handling throughput.
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| MEM-2900-512U1.5GB |  MEM-2900-512U1GB |  MEM-2951-512U1.5GB |  MEM-2951-512U1GB |  MEM-2900-512MB | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR3 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 1.5GB | 512 GB | 512 GB | 512 GB | 512 MB |
| Compatible Platforms | Desktop | Desktop / Server | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop / Server |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 1600 MHz | 2900 MHz | 3200 MHz | 3200 MHz | 2933 MHz |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL11 | CL16 | CL16 | CL16 | CL16 |
| Voltage | 1.5V | 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 | No | Intel XMP 2.0 | No | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Use Case | General Use | Workstation | Gaming / Workstation / Server | Server | Workstation |
| Product Name | MEM-2900-512U1.5GB | MEM-2900-512U1GB | MEM-2951-512U1.5GB Memory Module | MEM-2951-512U1GB | MEM-2900-512MB |
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.
Balanced upgrade improving routing efficiency.
Cisco memory met expectations.
Stable performance after upgrade.
Good mid range memory option.
Worked perfectly in our ISR 2911.
The MEM-2900-512U1.5GB upgrade kit enhances Cisco 2901 and 2921 routers by adding 1GB and 512MB DRAM modules to expand memory from 512MB to 1.5GB.
The MEM-2900-512U1.5GB kit is fully compatible with Cisco ISR 2901 and 2921 router series running Cisco IOS.
Increasing DRAM to 1.5GB enables higher throughput, supports advanced features, and prevents memory-related bottlenecks under heavy network loads.
Yes. Installation requires removing the router cover, seating the new 1GB and 512MB modules in the DRAM slots, and rebooting for automatic memory recognition.
No software update is required; Cisco IOS automatically detects and utilizes the expanded DRAM on reboot.
Yes. MEM-2900-512U1.5GB modules are manufactured to Cisco specifications and carry the same quality and reliability as OEM components.
This upgrade kit includes a one-year warranty covering defects in materials and workmanship, with optional extended warranty plans available.
After reboot, enter the 'show memory summary' command in the Cisco IOS CLI to confirm total DRAM of 1536MB.
Yes. Simply power down the router, remove the added modules, and reinstall the original 512MB DRAM module.
Yes. Additional DRAM ensures sufficient resources for IOS security features such as VPN acceleration, firewall, and IPS.
The kit includes one PC3-10600 DDR3 1GB module and one PC3-10600 DDR3 512MB module, both rated at 1333 MHz with CL9 latency.
We offer standard 3–5 business day shipping and expedited options to deliver the MEM-2900-512U1.5GB kit promptly.
No. Increasing DRAM does not change your existing IOS license; you retain all current feature sets and entitlements.
MEM-2900-512U1.5GB is compatible with all Cisco IOS versions supported on ISR 2901 and 2921 routers without known conflicts.
Expect faster packet processing, support for larger routing tables, improved VPN performance, and enhanced reliability under peak loads.
We offer a 30-day return window on unused, undamaged kits with full refund, minus shipping fees, upon receipt of the original packaging.
United States
