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BIOS Tuning Guide - BIOS Tuning - Page 8


By: | Guides | Posted: Feb 26, 2002 5:00 am

- Frequency/Voltage Control

 

 

This is the area where you will find most of the options that enable you to overclock your processor, whether they be increasing the frequency (FSB speed), or increasing the voltage, which in turn enables higher overclocking results. Due to the fact that the motherboard used in this guide is a Pentium 4 based motherboard, the option for multiplier adjustment is not there (Intel CPUs feature a locked multiplier).

 

CPU Host Frequency (MHz) - This option allows you to change the FSB (Front Side Bus) speed of your processor. The overall clock speed of your processor is worked out by the formula multiplier x FSB = clock speed. Therefore, if you have a multiplier of 9 and a FSB of 150MHz, then the clock speed of your processor is 1350MHz. Most processors have a default FSB speed of either 100MHz or 133MHz. The more you increase the FSB, the higher performance you will get. Increment this by 1MHz at a time until you experience instability, in which case you will reduce it by a few MHz and test again. Keep doing this until you find the maximum speed your system will allow, without becoming unstable.

 

PCI/AGP Divider - This setting allows you to lock the PCI/AGP bus at a certain speed. The advantage of this is that you can set your FSB (Front Side Bus) speed much higher, without having the PCI/AGP bus as a bottleneck. Thus enabling much higher overclocking.

 

Host/DRAM Clock ratio - This controls the DRAM frequency. You can set it to 100MHz, 133MHz or even 166MHz if you're motherboard supports DDR333 memory. If you have memory rated at 100MHz, try setting it to 133MHz for increased speed. If you experience instability, drop it back down to 100MHz. If you have 133MHz memory, try 166MHz and so on.

 

DIMM OverVoltage Control - This option allows you to adjust the voltage of your memory module/s. Increasing the voltage will help you maintain stability at high overclocked speeds. Be warned though that the higher you increase the voltage, the more heat your memory modules will generate. If there is too much heat, your system will become unstable anyway, defeating the purpose of the voltage increase. Make sure your system has sufficient cooling before overclocking/increasing the voltage for best results.

 

AGP OverVoltage Control - This option allows you to adjust the voltage of your AGP card. Increasing the voltage will help you maintain stability at high overclocked speeds. Be warned though that the higher you increase the voltage, the more heat your AGP card will generate. If there is too much heat, your system will become unstable anyway, defeating the purpose of the voltage increase. Make sure your system has sufficient cooling before overclocking/increasing the voltage for best results.

 

CPU OverVoltage Control - This option allows you to adjust the voltage of your CPU. Increasing the voltage will help you maintain stability at high overclocked speeds. Be warned though that the higher you increase the voltage, the more heat your CPU will generate. If there is too much heat, your system will become unstable anyway, defeating the purpose of the voltage increase. Make sure your system has sufficient cooling before overclocking/increasing the voltage for best results.

 

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