These days a lot of attention is paid to the ecology and green technologies, including manufacturers of servers. Hewlett Packard is not the exception. There are number of parameters in the settings of server's BIOS, which affect the power consumption of hardware. And, naturally, these parameters also affect performance. You may not know this, but these are installed by default settings, significantly reduce the speed of the memory and CPU.
I will show you where these parameters are located. Setting the highest values for these settings helped us to significantly increase the speed of VmWare ESXi hosts and to achieve a shorter response for SAP systems. These recommendations are taken from SAP notes.