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© 2016 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 
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Data Sheet 
Cisco UCS B420 M4 Blade Server 
Product Overview 
The Cisco Unified Computing System
™
 (Cisco UCS
®
) unites networks, storage, and management fabric and 
revolutionizes server deployment, enabling a flexible, stateless computing environment for Cisco UCS B-Series 
Blade Servers and C-Series Rack Servers. With this unique approach, Cisco UCS reduces total cost of ownership 
(TCO) and increases business agility. 
The Cisco UCS B420 M4 Blade Server expands the Cisco UCS 4-socket blade portfolio. 
Features and Benefits 
Designed for demanding virtualization and database workloads, the Cisco UCS B420 M4 combines a large 
memory footprint with 4-socket scalability, using the Intel
®
 Xeon
®
 processor E5-4600 v4 and v3 product family. The 
Cisco UCS B420 M4 supports 2400 MHz DDR4 memory and uses UCS Cisco Virtual Interface Card (VIC) 
technology to achieve up to 160 Gbps of aggregate I/O bandwidth, all in a dense, full-width blade form factor. The 
Cisco UCS B420 M4 maintains memory performance even as capacity grows. In addition, with the large power 
envelope of the Cisco UCS 5108 Blade Server Chassis, the Cisco UCS B420 can handle up to 3 TB of memory 
without compromising CPU speed or core count. Up to four Cisco UCS B420 M4 Blade Servers can be installed in 
the Cisco UCS 5108 Blade Server Chassis. 
The Cisco UCS B420 M4 is centrally managed using Cisco UCS Manager. Cisco UCS Manager provides a single 
management interface for all hardware and software components of a Cisco UCS domain. Cisco UCS Manager 
manages up to 160 servers, using Cisco
®
 to consolidate network, storage, and 
management traffic. With 
, management can be extended globally to thousands of 
servers in multiple domains. 
Figure 1.    Cisco UCS B420 M4 Blade Server 
 
The Cisco UCS B420 M4 provides: 
● 
Four Intel
®
 Xeon
®
 processor E5-4600 v4 and v3 series CPUs, for up to 88 cores per server 
● 
Forty-eight DIMM slots, providing 3 TB of 2400 MHz DDR4 memory 
● 
Three mezzanine connectors, supporting 160 Gbps bandwidth 
● 
Four SAS, SATA, or SSD hot-pluggable drive bays 
● 
RAID 0, 1, 5, 6 and 10, with optional 2 GB flash-backed write cache 
● 
Up to four Cisco UCS B420 M4 Blade Servers per Cisco UCS 5108 Blade Server Chassis