HP ProLiant AMD-based 300-series G7 servers

Cool Speed ™

Cool Speed technology protects processor integrity by reducing power-states when the processor

reaches an established temperature limit. This technology allows a server to continue operating if the

processor thermal environment exceeds safe operational limits.

It is important for managers to understand that Cool Speed is an automated processor feature. Within

a rack environment, some server platforms may initiate this process while other servers do not. Given

the same workload, Cool Speed activation will depend on the installed processor model and local

environmental conditions. AMD Cool Speed is enabled by default and is not a user option.

C1E ™

In G34 based

-systems, the Northbridge chipset detects when all of the processor cores are idle and

communicates that command to the Southbridge chipset. After the command is sent, the Northbridge

and HT links are powered down and the cores go into a deeper sleep state. Depending on system

configuration, this feature can equate to significant data center power savings when the Northbridge

and HT links are powered down and cores are at idle. The OS manages C1E and it is enabled or

disabled through the RBSU.

PowerNow! Technology

AMD PowerN

ow! Technology with Independent Dynamic Core technology and Dual Dynamic Power

Management™ is technology that allows the processors to run dynamically at different frequencies

and voltages depending upon CPU computing demand. As a result, PowerNow! can lower server

power consumption without compromising performance.

AMD PowerNow! can be enabled on ProLiant AMD-based 300-series G7 servers through the BIOS-

controlled Dynamic Mode of Power Regulator for ProLiant, which does not require an OS driver.

Power Cap Manager

Power Cap Manager allows administrators to set a fixed limit on a server'

s processor power

consumption. In a multi-core environment, administrators control the P-state of individual cores. The

caveat is that a single voltage is supplied to all cores in the processor even if different P-states are

requested by the user. If an administrator requests different P-states for different cores in the processor,

the actual P-state will equal that of the highest voltage required among the selected P-states.

Administrators can control this through HP Dynamic Power Capping, accessed from iLO advanced

menus or the HP ICE management suite.

AMD Core Select

AMD Core Selec

t lets administrators use the RBSU to select the number of software-visible cores per

CPU (minimum of one, up to full number supported). Operating systems and applications can

recognize the reduced core count so that fewer software licenses may be required. By reducing core

count recognition, Core Select has the potential to reduce software licensing costs. Also, applications

can benefit from increased memory bandwidth and cache per core. This feature is offered on HP

ProLiant G7 platforms with the AMD 6100 series processors. The feature is also supported on ProLiant

G6 servers that are configured with the AMD 2400 or 8400 series processors and the latest System

ROM supporting this feature.

For more information on these processor management technologies, please consult the HP ROM-

Based Setup Utility User Guide for more details on these options.

http://h20000.www2.hp.com/bc/docs/support/S

upportManual/c00191707/c00191707.pdf