Overclocking P4 1.6A problems.

[Twinhead]

I have a P4 1.6A proc MSI 845G Max mobo, and 2 sticks of Crucial PC2100 DDR ram.

When I increase the FSB to 125, the clock speed goes up to 125 X 16 = 2 GHz
The boot up screen show DRAM frequency as 333MHz

The system boots up find, but I couldn't boot into Windows XP.

Then I decreased the FSB to 115. I could boot into WinXP but unstable.

I am wondering if this is because the DRAM frequency? I heard something about the ratio stuff, but I don't understand.
Anyone can help? Thanks.

 

[SupermanCK]

check you bios mem ratio setting...you might be running 4:5...set it to 1:1
and if unstable...up voltage of cpu....vcore....make sure you have good cooling...watch CPU temp.....i also suggest not to adjust vcore more than 1.75v

 

[Twinhead]

I have looked through those BIOS setting so many times. I don't I saw such setting for mem ratio.
Maybe I missed something?

 

[Twinhead]

how's the ratio setting looks like?

 

[Duvie]

It should be under where frequency and voltages are set in the bios, and likley is right next to settings for cpu clock and vcore....if it was set to 1:1 you should have been able to run 133fsb and it would be at pc2100...If 4:5 is being used...


115=287.5mhz...crucial should do easy....

125=312.5mhz....may be tougher....


Try going ahead and bumping vcore up a notch...could be cpu just as welll

 

[Twinhead]

thanks for those comments guys. I've figured out the setting in the BIOS.