MSI K8NM-FISR User Manual page 60

MS-7034 M-ATX Mainboard
RAS# to CAS# delay (tRCD)
When DRAM is refreshed, both rows and columns are addressed separately.
This setup item allows you to determine the timing of the transition from RAS
(row address strobe) to CAS (column address strobe). The less the clock
cycles, the faster the DRAM performance. Setting options: [Auto], [2], [3], [4],
[5], [6] and [7].
Min RAS# Active Time (tRAS)
This setting determines the time RAS takes to read from and write to a memory
cell. Setting options: [Auto], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14] and
[15].
Row Precharge Time (tRP)
This item controls the number of cycles for Row Address Strobe (RAS) to be
allowed to precharge. If insufficient time is allowed for the RAS to accumulate
its charge before DRAM refresh, refreshing may be incomplete and DRAM
may fail to retain data. This item applies only when synchronous DRAM is
installed in the system. Available settings: [Auto], [2], [3], [4], [5] and [6].
Spread Spectrum
When the motherboard's clock generator pulses, the extreme values (spikes) of the
pulses creates EMI (Electromagnetic Interference). The Spread Spectrum function
reduces the EMI generated by modulating the pulses so that the spikes of the pulses
are reduced to flatter curves.
MSI Reminds You...
1. If you do not have any EMI problem, leave the setting at [Disabled] for
optimal system stability and performance. But if you are plagued by
EMI, select the value of Spread Spectrum for EMI reduction.
2. The greater the Spread Spectrum value is, the greater the EMI is
reduced, and the system will become less stable. For the most suit-
able Spread Spectrum value, please consult your local EMI regulation.
3. Remember to disable Spread Spectrum if you are overclocking be-
cause even a slight jitter can introduce a temporary boost in clock
speed which may just cause your overclocked processor to lock up.
HT Frequency
This setting specifies the maximum operating frequency of the link's transmitter clock.
Setting options: [1x], [2x], [3x], and [4x].
Cool'n'Quiet control
This feature is especially desiged for AMD Athlon processor, which provides a CPU
temperature detecting function to prevent your CPU's from overheating due to the
heavy working loading. Setting options: [Disabled] and [Auto].
Adjust CPU Ratio
This item lets you to adjust the CPU ratio. Setting to [Startup] enables the CPU running
at the fastest speed which is detected by system. Setting options are: [Startup], [x4]
~[x20].
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