Acer AB2x280 F1 Acer AB7000 Enclosure with AB2x280 F1 and AB460 F1 Blade Serve - Page 71

Demand Scrubbing: A memory error-correction scheme where the processor writes corrected data back into the 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 correcting resident errors. Throttling - Closed Loop/Throttling - Open Loop: Throttling improves reliability and reduces power in the processor by automatic voltage control during processor idle states. If Enabled, the following items will appear: • Hysteresis Temperature (For Closed Loop only) - Temperature Hysteresis is the temperature lag (in degrees Celsius) after the set DIMM temperature threshold is reached before Closed Loop Throttling begins. • Guardband Temperature (For the Closed Loop only) - This is the temperature which applies to the DIMM temperature threshold. Steps are in 0.5 °C increments. The default is [006]. Press "+" or "-" on your keyboard 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 °C increments. 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. The default is [400]. Press "+" or "-" on your keyboard to change this value. North Bridge configuration This 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, freeing resources 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 and maximize data processing effi ciency. Prefetching too frequently can saturate the cache directory and delay necessary 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 reporting the I/O device assignments to VMM through the DMAR ACPI Tables. This feature offers fully-protected I/O resource-sharing across the Intel platforms, providing you with greater reliability, security and availability in networking and data-sharing. Chapter 8 63