United States$5,000,000+
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Kyle Brennan
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Practical upgrade for modest performance needs.
MEM-2900-512U1GB
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UPG 1GB KIT 2X512MB FROM 512MB DRAM FOR CISCO 2901-2921
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Name:
MEM-2900-512U1GB
- Description:
- UPG 1GB KIT 2X512MB FROM 512MB DRAM FOR CISCO 2901-2921
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 12306905088
- Condition:
- Warranty:
- 3
- List Price:
$600.00
- Price:
$196.0067.3% off
Quantity:
1
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MEM-2900-512U1GB Overview
MEM-2900-512U1GB is a high-performance DDR4 UDIMM engineered for advanced workstation and server builds. Built to operate at 2900 MHz with a tight CL16 timing and 1.35V power requirement, this unbuffered memory module delivers reliable performance without ECC support while featuring an integrated heatspreader for optimal thermal management.
Designed as a single-channel kit, MEM-2900-512U1GB combines cutting-edge memory technology with robust construction to support desktop and server platforms. Although it does not offer RGB lighting or XMP enhancements, its proven DDR4 design and compatibility make it an ideal choice for professionals seeking consistent performance in mission-critical applications.
MEM-2900-512U1GB price is $196.00, a 67.3% saving from the Cisco list price of $600.00. MEM-2900-512U1GB is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for MEM-2900-512U1GB for additional pricing. Browse the full 2900 Router Memory & Flash series or explore all Cisco products.
MEM-2900-512U1GB Specifications
- Weight
- N/A
- Height
- N/A
- Depth
- N/A
- Width
- N/A
- Operating Temperature
- N/A
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Form Factor
- UDIMM
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- Voltage
- 1.35V
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Kit Configuration
- Single Channel
- Intel Platform Support
- N/A
- Compatible Platforms
- Desktop / Server
- Compatible Systems
- N/A
- AMD Platform Support
- N/A
- XMP Support
- No
- Use Case
- Workstation
- Capacity
- 512 GB
- Speed
- 2900 MHz
- Product Name
- MEM-2900-512U1GB
MEM-2900-512U1GB Use Case
High-Performance Branch Office Routing Upgrade
In a multi-site enterprise, network admins install the MEM-2900-512U1GB-UPG to double the Cisco 2901/2921’s DRAM from 512 MB to 1 GB. This upgrade delivers up to 45% faster throughput under heavy web and file-transfer loads, ensuring consistent application performance and reduced packet loss across branch offices.
Optimized VPN and Security Appliance Throughput
A managed service provider deploys the 1 GB DRAM kit on Cisco 2901 routers to support hundreds of IPsec VPN tunnels at remote sites. The extra memory enables up to 2× higher encryption session capacity, reducing CPU contention and delivering stable, low-latency connections for secure telework and B2B traffic.
Reliable VoIP and Video Conferencing Operations
An educational institution upgrades its campus routers with MEM-2900-512U1GB-UPG to handle concurrent VoIP calls and HD video streams. The expanded DRAM buffer minimizes jitter and call drops, guaranteeing clear audio/video quality and uninterrupted distance learning sessions during peak hours.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| MEM-2900-512U1GB |  MEM-2951-512U1GB |  MEM-2951-512U4GB |  MEM-2900-1GB= |  MEM-2900-512MB= | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR3 | DDR4 |
| Capacity | 512 GB | 512 GB | 4 GB | 1 GB | 512 MB |
| Compatible Platforms | Desktop / Server | Desktop / Laptop / Server | Desktop / Laptop / Server | Desktop | Desktop / Server |
| Compatible Systems | N/A | Rack Server / Tower Server / Blade Server / Workstation / N/A | Workstation | N/A | Tower Server / Workstation |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Single Channel | Single Channel | Single Channel |
| Speed | 2900 MHz | 3200 MHz | 3200 MHz | 1600 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 | CL11 | CL16 |
| Voltage | 1.35V | 1.35V | 1.35V | 1.5V | 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 |
| Intel Platform Support | N/A | Intel 13th Gen | Intel 10th Gen | N/A | Intel 13th Gen |
| AMD Platform Support | N/A | AMD Ryzen 5000 | AMD Ryzen 5000 | N/A | AMD Ryzen 5000 |
| Use Case | Workstation | Server | Gaming / Workstation | General Use | Workstation |
| Product Name | MEM-2900-512U1GB | MEM-2951-512U1GB | MEM-2951-512U4GB | MEM-2900-1GB= | MEM-2900-512MB= |
| Height | N/A | 1.18 inches | 1.2 inches | 1.2 inches | 1.2 inches |
| Width | N/A | 5.25 inches | 5.3 inches | 5.3 inches | 5.3 inches |
| Depth | N/A | 0.36 inches | 0.5 inches | 0.2 inches | 0.5 inches |
| Weight | N/A | 0.3 lbs | 0.3 lbs | 0.15 lbs | 0.2 lbs |
Reviews & Ratings
L
Liam Porter
5
Cisco memory ensured reliability.
M
Mason Caldwell
4
Installation was straightforward.
N
Nathan Brooks
5
Stable and dependable results.
O
Owen Fisher
4
Good value memory kit.
Questions & Answers
What is the MEM-2900-512U1GB 1GB upgrade kit?
The MEM-2900-512U1GB is a Cisco-certified memory upgrade kit containing two 512 MB DRAM modules to expand compatible routers from 512 MB to 1 GB of RAM.
Which Cisco router models are compatible with this memory upgrade?
This upgrade kit is compatible with Cisco 2901, 2911, and 2921 Integrated Services Routers.
How does upgrading to 1GB of DRAM improve my Cisco 2901-2921 router’s performance?
Increasing to 1 GB of DRAM enables larger routing tables, accelerated VPN and QoS processing, and support for advanced security features.
Is the installation of the 2×512 MB DRAM modules user-friendly?
Yes. Installation requires only following the included Cisco hardware guide—no soldering or specialized training is needed.
Do I need any special tools to install the MEM-2900-512U1GB kit?
Only a standard Phillips screwdriver is required to open the chassis and secure the new memory modules.
Will installing this memory upgrade kit void my Cisco warranty?
No. Cisco’s customer-installable-part policy covers DRAM upgrades, so your original equipment warranty remains intact.
How do I verify compatibility before purchasing the memory upgrade?
Check the router’s model number on its chassis (2901/2911/2921) and ensure it currently has a single 512 MB DRAM module installed.
What warranty and support are included with the MEM-2900-512U1GB kit?
The kit includes a 90-day replacement warranty and lifetime technical support via authorized Cisco partners.
Are these DRAM modules genuine Cisco parts?
Yes. The MEM-2900-512U1GB kit contains genuine Cisco-certified DRAM modules for full compatibility and reliability.
Can I return the memory upgrade kit if it’s not compatible with my router?
Yes. Unopened kits may be returned within 30 days for a full refund under our standard return policy.
How soon will I notice performance improvements after installing the upgrade?
Performance gains—such as faster VPN throughput and smoother multitasking—are immediate after rebooting the router.
Is an instruction manual included with the upgrade kit?
Yes. An illustrated, step-by-step installation guide is included to ensure safe and accurate module replacement.
Can I mix the new 512 MB modules with existing DRAM modules of a different size?
No. For system stability, both slots must be populated with the matching 512 MB modules provided in the kit.
Does this upgrade support advanced Cisco IOS features?
Yes. Upgrading to 1 GB of DRAM unlocks advanced IOS features such as Zone-Based Firewall, IPS, and enhanced MPLS.
What are the step-by-step installation instructions?
Power down and unplug the router, remove the chassis cover, replace the old module with each new 512 MB DRAM in the slots, reinstall the cover, then power on.
How does MEM-2900-512U1GB differ from other Cisco memory upgrade kits?
This kit specifically provides two 512 MB modules for Cisco 2901–2921 routers, while other kits offer different capacities and model compatibility.