Pls gimme advice on those ratios using 845G

[kovax]

Hi,

I have a P4 1.6A and a DDR333 stick.
There is an ABIT BG7 i845G Mobo coming into my hands.
I would like to utilize my DDR33 instead of just downgrading it to 266.
I am not an OC fan (dunno anything about it), so just to be on the safe side, I would like to solve it by only as slight OC of the processor as it is possible.
Could anyone give me some hints, what settings I should use so that my mem would run @333, but I would not risk my processor by my unexperienced OC (well, if it is possible at all).
Actually, If anyone could very briefly explain what those annoying ratio values everybody keeps referring to mean, I would really appreciate it.
Thanks for any answer.
Kovax

 

[o1die]

Try setting your cpu clock at 133, and the cpu/mem ratio at 4:5. You may have to increase the cpu vcore slightly to run stable. Your default cpu voltage should be about 1.5 volts. You can try 1.6 volts if the system gives you error messages while in windows. Your cpu temps won't rise more than a degree or two with such a small increase. If your board doesn't have the 4:5 ratio, try the 3:4 ratio. For example, with your cpu at 133 fsb, with the 4:5 ratio, the ddram would be at 166. 133/166 = 4:5. 166 x 2 = 333 (should post as pc2700), which is your ddram speed rating. These settings should all be in the "frequency/voltage control" section of the bios. Also, find your cmos jumper, in case you accidentally change the wrong setting and your system won't post. With the power supply unplugged, you simple move the cmos jumper over one position to the next pin (and leave for 10 seconds), then return it to it's original position which changes the bios to the default settings. Then, you can start over with adjustments.

 

[oldfart]

As above, you will need to overclock to get to DDR333. Also as above, a small overclock is not normally any problem.

133 FSB, 4:5 ratio = DDR333, 2.13 GHz
125 FSB, 3:4 ratio = DDR333, 2.0 GHz