How do I change CPU FSB Freq on 975X Platinum Pue

Hi all!
I´m thinking about overclocking my CPU and that will be my first time ever. So I am a complete noob in this matter.
I have already read the sticky "975x Platinum Pue Overclocking Guide" (I do have that board) and will have it for reference later.
1. I have one question regarding changing CPU FSB frequency. I´m asked to key in a DEC number. But how should I do it. The guide says to "Start from 266 fsb increase by 3 fsb". So do I have to put in 269 to begin with, or how else do I change the number.
2. One other thing I want to ask of before I begin. My memory is Corsair XMS2 2x1GB 800MHz PC2-6400 CL5 in Dual channel. But in Bios it says 667MHz and voltage 1.8. Do I need to adjust memory clock ratio and the voltage before I begin overclocking?
3. My third question is: if overclocking Core 2 Duo E6400 to about 3.2GHz could I face some stability issue in regard to my PSU of 410W? (that my PSU could influence the system stability in a negative way). My system is very stable I think and the PSU fan is very quiet.
4. I´m using the the most recent Speedfan and it shows unusually high cpu temps, about 100c which is wrong as I´m using hardware temperature monitor which says about 35c idle and the BIOS says about the same. Which software cpu temp monitor would you recommend?

Speedfan is no good for Core2 Duo + 975xPUE, use CoreTemp
To change your FSB, simply put in a new number. The multiplier is locked on this board still I believe, so to calculate the frequency you'll get, just multiply the FSB by 9 and that should give it to you. So, yes, that means do 269, stress test, then 272, stress test, etc. BUT, the 266 they used in that guide is from an E6600, you don't have that. You want to start from whatever it is as default.
The reason you go up by 3 is because of stability issues as far as voltage is concerned. That is to say, go up by three, stress test (i like to use 2 instances of Folding@Home) and if it crashes, raise the voltage a little.
Make your fsb:memory ratio 1:1 always, and that means it will run a little slower than what it's rated at to begin with but then you can move up from there. As a beginner doing a pretty small overclock, you shouldn't worry about RAM. At 3.2GHz your RAM will be running at 712MHz, which is a little slower, but once you get more experienced that means you'll be able to tighten the timings.
Good luck and be safe

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Quote
Originally posted by jdurg
If I recall correctly, once you reach a front-side-bus of 123 MHz, the ratio sticks at 1:1. So at a fsb higher than 123, the memory ratio will ALWAYS be 1:1 no matter what you set it at. X( You are correct on your ratio assumptions, but at 123 MHz the memory ratios become useless. The Auto option is as it suggests. The BIOS will automatically set all the RAM timings per what the chips are rated at. So if you have the memory set to Auto, you won't be able to change the CAS timings and the other various memory options.
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Welcome
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