What processors does the ISR 4000 support — and can the CPU be upgraded?

Aggregate 35 Mbps-1.5 Gbps default; over 7 Gbps with Boost (ISR4461) — ICD (icd3s.com) supplies compatibility-verified parts for the ISR 4000 with worldwide shipping. Request a quote at https://icd3s.com/quote-request/.

What power supply options does the ISR 4000 support?

Internal AC; DC options; PoE up to 500W; redundant on 4431+ — ICD (icd3s.com) supplies compatibility-verified parts for the ISR 4000 with worldwide shipping. Request a quote at https://icd3s.com/quote-request/.

What networking and connectivity does the ISR 4000 offer?

2-4x onboard GE; 2-3 NIM slots, 0-3 SM-X slots by model — ICD (icd3s.com) supplies compatibility-verified parts for the ISR 4000 with worldwide shipping. Request a quote at https://icd3s.com/quote-request/.

What upgrades are available for the Cisco ISR 4000?

ICD offers 0 verified compatible upgrades across 0 categories including . All parts are tested and guaranteed compatible.

Can I upgrade the memory in my ISR 4000?

Yes. The ISR 4000 supports up to maximum capacity of RAM. ICD stocks all compatible memory modules with guaranteed compatibility.

Cisco ISR 4000 Upgrade Guide

Maximize the performance and lifespan of your ISR 4000 (ISR-4000). Every upgrade option below is verified compatible.

0Upgrade Categories

0Options Available

Verified Specifications

Processor Options	Aggregate 35 Mbps-1.5 Gbps default; over 7 Gbps with Boost (ISR4461)
Power Supply Options	Internal AC; DC options; PoE up to 500W; redundant on 4431+
Networking Options	2-4x onboard GE; 2-3 NIM slots, 0-3 SM-X slots by model
Specification Source	Cisco official documentation (verified 2026-07-02)

About the ISR 4000

Cisco ISR 4000 Series Integrated Services Router

Technical specifications

Generation	ISR-4000
Device type	Networking
End of Sale	2023-11-07

Recommended upgrade strategy

Network equipment like the ISR 4000 typically upgrades via SFP, SFP+, or QSFP transceiver replacements, license-tier increases, line-card additions, and PSU redundancy. Cisco ISR 4000 works with ICD stocked transceiver inventory and supports field-replaceable component upgrades.

ICD Cisco expertise

Cisco UCS upgrades require careful UCSM and Intersight version awareness and fabric-interconnect compatibility checking. ICD Cisco engineering team verifies firmware compatibility, smart-licensing, and fabric topology before any component ships.

Upgrade categories ICD can quote for the ISR 4000

Even when our database does not yet list specific compatible parts for the ISR 4000, ICD engineering team sources verified-compatible components across these categories. Submit a quote request with your current configuration:

Memory — DDR3, DDR4, DDR5 RDIMM, LRDIMM, ECC SO-DIMM modules at maximum supported capacity
Storage — Enterprise SSDs (SAS, SATA, NVMe), HDDs (NL-SAS, SAS 10K/15K RPM), and tape generations
RAID and HBA controllers — Hardware RAID, JBOD passthrough, fabric attach, with cache battery
Network adapters — 1GbE, 10GbE, 25GbE, 40GbE, 100GbE NICs plus SFP+ and QSFP transceiver modules
Power supplies — Redundant hot-swap PSUs in matching wattage and connector specification
CPUs — Intel Xeon Scalable and AMD EPYC where socket-compatible with this platform
GPUs — NVIDIA Tesla, A-series, and RTX A-series for compute and visualization workloads
Accessories — Bezels, mounting rails, drive caddies, cooling fans, and chassis hardware

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More ISR 4000 Resources

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