User manual MSI MS-7380 PLATINUM REV V1.0 - 12-2007

[. . . ] P7N SLI Platinum Series MS-7380 (v1. X) Mainboard G52-73801X1 i Copyright Notice T he material in this doc ument is the intellec tual property of M ICRO-STAR INTERNATIONAL. We take every care in the preparation of this document, but no guarantee is given as to the correctness of its contents. Our products are under continual improvement and we reserve the right to make changes without notice. Trademarks All trademarks are the properties of their respective owners. NVIDIA, the NVIDIA logo, DualNet, and nForce are registered trademarks or trademarks of NVIDIA Corporation in the United States and/or other countries. [. . . ] tWR W hen the Memory Timings sets to [Manual], the field is adjustable. Minimum time interval between end of write data burst and the start of a precharge command. tWTR W hen the Memory Timings sets to [Manual], the field is adjustable. Minimum time interval between the end of write data burst and the start of a column-read command. It allows I/O gating to overdrive sense amplifiers before read command starts. tREF W hen the Memory Timings sets to [Manual], the field is adjustable. Specifies the refresh rate of the DIMM requiring the most frequent refresh. 3-20 BIOS Setup 1T/2T M emory Timing This item controls the SDRAM command rate. Select [1T] makes SDRAM signal controller to run at 1T (T=clock cycles) rate. Adjust PCI-E Frequency (MHz) This field allows you to select the PCI-E frequency (in MHz). M emory Voltage (V) Adjusting the memory voltage can increase the memory speed. Spread Spectrum W hen the motherboard's clock generator pulses, the extreme values (spikes) of the pulses create 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. If you do not have any EMI problem, leave the setting at Disabled for optimal system stability and performance. Remember to disable Spread Spectrum if you are overclocking because even a slight jitter can introduce a temporary boost in clock speed which may just cause your overclocked processor to lock up. Important 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. The greater the Spread Spectrum value is, the greater the EMI is reduced, and the system will become less stable. For the most suitable Spread Spectrum value, please consult your local EMI regulation. Remember to disable Spread Spectrum if you are overclocking because even a slight jitter can introduce a temporary boost in clock speed which may just cause your overclocked processor to lock up. 3-21 M S-7380 M ainboard CPU and Memory Clock Overclocking The D. O. T. Control/ FSB Clock/ Memory Clock are the items for you to overclock the CPU and the Memory. Please refer to the descriptions of these fields for more information. Important This motherboard supports overclocking greatly. However, please make sure your peripherals and c omponents are bearable for s ome spec ial s e ttin gs . [. . . ] By the way, if you need to conduct overclocking manually, please do not to apply the DOT function. D-5 M S-7380 M ainboard Clock In the Clock sub-menu, you can see clock status (including FSB/ CPU clock of mainboard and GPU/ memory clock of graphics card) of your system. There will be several items for you to select for overclocking after you click button. You can click the plus sign button to increase the clock, or click the minus sign button to decrease the clock. If you do not want to apply the adjustments, click the Cancel button to cancel. [. . . ]