MEM-4400-4GU16G-RF: Cisco 4GB-to-16GB DRAM Memory Upgrade Kit (2x8GB), remanufactured, for ISR 4400 Series Routers (4431, 4451)
MPN: MEM-4400-4GU16G-RF|By: Cisco

Price
Quoted on request
Current pricing within 48 business hours.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
The Cisco 4GB-to-16GB DRAM Memory upgrade Kit (2x8GB), remanufactured, for ISR 4400 series routers (4431, 4451) is supplied under part number MEM-4400-4GU16G-RF. Registered, load-reduced and unbuffered modules are not interchangeable, and a board that accepts one will refuse to post on another. Send the server model and we will check it against the supported-DIMM list before you order.
If the part is wrong for your platform we will say so and suggest the one that is, which is cheaper for both of us than a return.
Specifications
General
- Manufacturer part number
- MEM-4400-4GU16G-RF
- Product Type
- Server Memory
- Manufacturer
- Cisco
Technical specifications
- Capacity
- 4GB
Interfaces & connectivity
- Port Configuration
- 2x8GB
These are the 4 facts we can state about MEM-4400-4GU16G-RF without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the Cisco MEM-4400-4GU16G-RF is deployed
- Swapping out a failed server memory module for MEM-4400-4GU16G-RF under change control
- Standardising a host on one module type and speed
- Replacing a DIMM flagged by correctable-error logging
Who this part is for
- Procurement buying memory kits against a documented configuration
- MSPs matching DIMMs to what a customer already has installed
- Teams retiring mixed-speed memory in favour of one consistent part
What you get ordering this from us
Ordered by part number
The order is placed against MEM-4400-4GU16G-RF, not against a description of it, so there is no room for a substitution you did not agree to.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Rank and voltage confirmed
We check rank, voltage and module type against the platform before quoting, which is where most memory orders go wrong.
Questions buyers ask about this part
Is MEM-4400-4GU16G-RF genuine and is the warranty intact?
Yes, new and sealed, with the Cisco warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
Will MEM-4400-4GU16G-RF work in my server?
Send the server model and a list of the DIMMs already fitted. Rank, voltage and population order all have to agree, and a module that is electrically compatible can still be unsupported in a given slot. We map the population before you order.
Do you accept purchase orders and quote at volume?
Yes. We quote against a purchase order and hold the price for the quote period, with tiered rates at quantity. Net terms are available once the account is approved.
Compare other Server Memory we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| SK hynix 32GB DDR5-5600 PC5-44800 ECC Registered CL46 288-Pin RDIMM Server Memory Module | SK hynix | Capacity: 32GB | In Stock | $215 |
| Samsung 16GB DDR4-3200 PC4-25600 ECC Registered CL22 288-Pin RDIMM Server Memory Module | Samsung | Capacity: 16GB | In Stock | $55 |
| Micron 128GB DDR4-3200 PC4-25600 ECC Load-Reduced CL22 288-Pin LRDIMM Server Memory Module | Micron | Capacity: 128GB | In Stock | $500 |
| Dell Technologies 16GB DDR5-4800 PC5-38400 ECC RDIMM CL40 288-Pin Server Memory Module | Dell Technologies | Capacity: 16GB | In Stock | $95 |
| HPE 16GB DDR5-4800 PC5-38400 ECC RDIMM CL40 288-Pin Server Memory Module | HPE | Capacity: 16GB | In Stock | $95 |
| Lenovo 16GB DDR5-4800 PC5-38400 ECC RDIMM CL40 288-Pin Server Memory Module | Lenovo | Capacity: 16GB | In Stock | $90 |
Browse all Server Memory or everything we stock from Cisco.
Specifying a system, not just the part?
Host memory on an AI node is normally sized against accelerator memory, so the model and its working set both fit.
