Acer AB2x280 F1 Service Manual

Contents

Acer AB2x280 F1 Service Manual Manual pdf 71 page image

Chapter 8 63Demand Scrubbing: A memory error-correction scheme where the processor writes corrected data back intothe memory block from where it was read by the processor.Patrol Scrubbing: A memory error-correction scheme that works in the background looking for and correctingresident errors.Throttling - Closed Loop/Throttling - Open Loop: Throttling improves reliability and reduces power in theprocessor by automatic voltage control during processor idle states. If Enabled, the following items willappear:• Hysteresis Temperature (For Closed Loop only) - Temperature Hysteresis is the temperature lag (indegrees Celsius) after the set DIMM temperature threshold is reached before Closed Loop Throttlingbegins.• Guardband Temperature (For the Closed Loop only) - This is the temperature which applies to the DIMMtemperature threshold. Steps are in 0.5 °C increments. The default is [006]. Press "+" or "-" on yourkeyboard to change this value.• Inlet Temperature - This is the temperature detected at the chassis inlet. Steps are in 0.5 °C increments.The default is [070]. Press "+" or "-" on your keyboard to change this value.• Temperature Rise - This is the temperature rise to the DIMM thermal zone. Steps are in 0.5 °Cincrements. The default is [020]. Press "+" or "-" on your keyboard to change this value.• Air Flow - This is the air flow speed to the DIMM modules. Each step is one mm/sec. The default is [1500].Press "+" or "-" on your keyboard to change this value.• Altitude - This feature defines how many meters above or below sea level the system is located.• DIMM Pitch - This is the physical space between each DIMM module. Each step is 1/1000 of an inch. Thedefault is [400]. Press "+" or "-" on your keyboard to change this value.North Bridge configurationThis feature allows you to configure the settings for the Intel North Bridge chip.Intel I/OAT: Significantly reduces CPU overhead by leveraging CPU architectural improvements, freeingresources for other tasks.DCA Technology: Uses Intel's DCA (Direct Cache Access) Technology to enhance data transfer effi ciency.DCA Prefetch Delay: Used with TOE components to prefetch data in order to shorten execution cycles andmaximize data processing effi ciency. Prefetching too frequently can saturate the cache directory and delaynecessary cache accesses. This feature reduces or increases the frequency the system prefetches data.Intel VT-d: Select Enabled to enable Intel Virtualization Technology support for Direct I/O VT-d by reportingthe I/O device assignments to VMM through the DMAR ACPI Tables. This feature offers fully-protected I/Oresource-sharing across the Intel platforms, providing you with greater reliability, security and availability innetworking and data-sharing.