What RAM is compatible with the Cisco ISR 4431?

The Cisco ISR 4431 supports up to 16GB of DDR4 DRAM 2133MHz RAM across 1 slot(s). Compatible modules are listed above with live pricing.

Can I upgrade the RAM in my Cisco ISR 4431?

Yes, the Cisco ISR 4431 supports RAM upgrades. The device has 1 RAM slot(s) and supports a maximum of 16GB.

RAM for Cisco ISR 4431 (ISR4431/K9)

Name: RAM for Cisco ISR 4431 ISR4431/K9
Brand: Cisco

Model Years: 2014–2023

Max RAM: 16GBRAM Slots: 1RAM Type: DDR4 DRAM 2133MHz

⚠ Single Slot — Limited Upgrade

Compatible RAM for the Cisco ISR 4431

Cisco 200GB SSD for ISR 4431

SSD-M2-200G

HIGH

SSD0MHz200GBM.2 SATA

Cisco 32GB Flash Memory for ISR 4400

MEM-4400-32G-FLSH

HIGH

Flash0MHz32GBCompactFlash

Cisco 16GB DDR4 DRAM for ISR 4431

MEM-4400-16G

HIGH

DDR4 DRAM2133MHz16GBDDR4 DIMM

Cisco 8GB Flash for ISR 4431

MEM-4400-8G-FLSH

HIGH

Flash0MHz8GBCompactFlash

Cisco 8GB DDR4 DRAM for ISR 4431

MEM-4400-8G

HIGH

DDR4 DRAM2133MHz8GBDDR4 DIMM

Cisco 8GB DDR4 DRAM for ISR 4431

5 listings

Crucial 16GB DDR4 DIMM for Cisco

CT16G4RFD8213

MEDIUM

DDR4 DRAM2133MHz16GBDDR4 DIMM

Kingston 16GB DDR4 DRAM for ISR 4431

KCS-SP421/16G

MEDIUM

DDR4 DRAM2133MHz16GBDDR4 DIMM

SanDisk 8GB Flash for ISR 4431

SDCF-008G-ISR

MEDIUM

Flash0MHz8GBCompactFlash

Kingston 8GB DDR4 DRAM for ISR 4351

KCS-SP421/8G

MEDIUM

DDR4 DRAM2133MHz8GBDDR4 DIMM

Crucial 8GB DDR4 DIMM for Cisco

CT8G4RFD8213

MEDIUM

DDR4 DRAM2133MHz8GBDDR4 DIMM

Crucial 8GB DDR4 DIMM for Cisco

2 listings

RAM Upgrade Guide for the Cisco ISR 4431

This device uses DDR4 DRAM at 2133MHz. Maximum supported capacity is 16GB.

This model has a single RAM slot. Maximum capacity is 16GB.

Always power off and unplug your device before installing RAM. Ground yourself to avoid static discharge.