Acer Veriton M661 Aspire M5620 Service Guide - Page 39

Parameter Description Options Spread When the system clock generator pulses, the [Enabled], Spectrum extreme values of the pulse generate excess [Disabled] EMI. Enabling pulse spectrum spread modulation changes the extreme values from spikes to flat curves, thus reducing EMI. This benefit may in some case be outweighed by problems with timing-critical devices, such as a clock-sensitive SCSI device. HT Spread Enables or Disables HT Spread Spectrum. [Enabled], Spectrum HT is Hyper Transport between CPU and [Disabled] North Bridge. SSE/SSE2 This feature controls the availability of the [Enabled], Instructions processor's SSE and SSE2 instruction sets. [Disabled] When enabled, the processor's SSE and SSE2 instruction sets are enabled. Software applications can make use of those instructions to better process large amounts of data quickly. When disabled, the processor's SSE and SSE2 instruction sets are disabled. Software applications will not be able to use those instructions to process multiple data elements simultaneously. However, the processor's MMX instruction set will still be available for use. It is highly recommended that you leave this BIOS feature at the default setting. 33