IBM System x3850 X5 Implementation Guide

Chapter 2. IBM eX5 technology 39
Figure 2-19 Operating modes in UEFI
Acoustic Mode
Figure 2-20 shows the Acoustic Mode predetermined values. They emphasize power-saving
server operation for generating less heat and noise. In turn, the system is able to lower the fan
speed of the power supplies and the blowers by setting the processors, QPI link, and memory
subsystem to a lower working frequency. Acoustic Mode provides lower system acoustics,
less heat, and the lowest power consumption at the expense of performance.
Figure 2-20 Acoustic Mode predetermined values
Efficiency Mode
Figure 2-21 on page 40 shows the Efficiency Mode predetermined values. This operating
mode provides the best balance between server performance and power consumption. In
short, Efficiency Mode gives the highest performance per watt ratio.

IBM System x3850 X5 Specifications

General

Processor Cores	Up to 10 cores per processor
Chipset	Intel 7500
Hard Drive Interface	SAS/SATA
Processor	Intel Xeon E7-4800 series, Intel Xeon E7-8800 series
Memory Slots	64 DIMM slots
Storage	Up to 16 x 2.5" hot-swap SAS/SATA HDDs or SSDs
RAID Support	RAID 0, 1, 5, 6, 10
Network Interface	Integrated Gigabit Ethernet
Operating System Support	Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware vSphere
Form Factor	4U Rack