MSI 865PE NEO2-PFS User Manual - Page 54

BIOS Setup MPS Revision This field allows you to select which MPS (Multi-Processor Specification) version to be used for the operating system. You need to select the MPS version supported by your operating system. Settings: 1.4 and 1.1. APIC ACPI SCI IRQ This field is used to enable or disable the APIC (Advanced Programmable Interrupt Controller). Due to compliance to PC2001 design guide, the system is able to run in APIC mode. Enabling APIC mode will expand available IRQs resources for the system. Settings: Enabled and Disabled. CPU L1 & L2 Cache Cache memory is additional memory that is much faster than conventional DRAM (system memory). When the CPU requests data, the system transfers the requested data from the main DRAM into cache memory, for even faster access by the CPU. The setting controls the internal cache (also known as L1 or level 1 cache). Setting to WriteBack will speed up the system performance. System BIOS Cacheable Selecting Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result. Setting options: Enabled, Disabled. C000, 32k Shadow This item specifies how the contents of the adapter ROM named in the item are handled. Settings are described below: Option Disabled Enabled Cached Description The specified ROM is not copied to RAM. The contents of specified ROM are copied to RAM for faster system performance. The contents of specified ROM are not only copied to RAM, the contents of the ROM area can be written to and read from cache memory. 3-11