Chapter 7: BIOS
Perfmon and DFX Devices
A PerfMon device monitors the activities of a remote system such as disk us- age, memory consumption, and CPU load which will allow an IT administrator to maximize the performance of each computer within the network. A DFX device, usually in the form of a USB adaptor, can be used to enhance audio performance. Select Unhide to display the Perfmon and DXF devices installed in the system. The options are HIDE and UNHIDE.
DRAM RAPL Mode
RAPL which stands for Running Average Power Limit is a feature that provides mechanisms to enforce power consumption limits on supported processors The options are DRAM RAPL MODE0 , DRAM RAPL MODE1, and Disabled.
MPST Support
Select Enabled to enable the Message Processing Subscriber Terminal which is used to process short messages. The options are Disabled and Enabled.
DDR Speed
Use this feature to force a DDR3 memory module to run at a frequency other than what the system is specified in the specification. The options are Auto, Force
Channel Interleaving
This feature selects from the different channel interleaving methods. The options are Auto, 1 Way, 2 Way, 3, Way, and 4 Way.
Rank Interleaving
This feature allows the user to select a rank memory interleaving method. The options are Auto, 1 Way, 2 Way, 4, Way, and 8 Way.
Patrol Scrub
Patrol Scrubbing is a process that allows the CPU to correct correctable memory errors detected on a memory module and send the correction to the requestor (the original source). When this item is set to Enabled, the IO hub will read and write back one cache line every 16K cycles, if there is no delay caused by internal processing. By using this method, roughly 64 GB of memory behind the IO hub will be scrubbed every day. The options are Enabled and Disabled.
