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Archive for the ‘Using FSB (CPU)’ Category

In Depth Overclocking Continued

Posted by driveout on February 6, 2011

FSB stands for Front Side Bus, this is what connects your cpu and ram together allowing for information to flow between them. Actually the fsb goes from the cpu to the northbride chipset but thats where ram and video card meet up. The difference between using FSB and Multipliers is FSB also effects your ram speed while the multipliers only change your cpu speed. How this works is FSB x Multipliers = Cpu speed in GHz. This means while overclocking with FSB not only does it change your CPU speed but also your ram, because of this you have to take a few extra steps in order to overclock successfully.

In this case using the FSB is similar to using the multipliers you still raise it by little increments. First of a little trick you have to do is lower the memory speed. Say stock is at 1066mhz at 2.1v lower the speed to 800mhz leaving the voltage stock at 2.1v. What this does is it gives you overhead room to work with because remember the fsb raises both the cpu and ram speed. If you think about it once you start overclocking the cpu speed your ram will go up as well and will reach the 1066mhz you started with.

So now its time to overclock what you do is go into the bios (basic input and output system). The way to get into it is press delete on boot up. Once your in it find the fsb speed and start to raise the mhz say its at 200mhz, raise it to 203mhz. Leave the cpu voltage at stock now save and reboot, once booted up run prime 95 and hwmonitor. Prime95 to test for stability and hwmonitor for temps oh and also its a good idea to get cpuz to check all the specs before and after overclocking. Once prime had ran for around 1 to 3 hours stop it, go back into the bios and increase the mhz some more say to 208mhz, keeping the voltage the same save and test again. Do this until you reach the maximum until you cant go any higher with out upping the voltage. Remember to monitor temperature at all times. When the maximum has reached and your at 218mhz and cant go any higher now its time to up the voltage by a little bit. After each raise and voltage change make sure to test. You shouldnt really have to touch the ram voltage as once it goes past its stock speed which is 1066mhz then you might have to but thats overclocking the ram so we will get into it on a separate post.

Like mentioned before the ram will go up as well if it goes up to high make sure you lower it. Theres a separate feature for overclocking the ram. Either way theres a few options you can do a FSB ratio which means whatever the CPU is clocked to the ram is less i think its 80 percent of the cpu overclock. Another thing that can be done is overclock the ram as well while overclocking the cpu using the fsb. What I recommend is lowering the mhz on ram and safely overclock the cpu. Using the same example as above say you went from 218mhz to 250mhz and your ram is at 850mhz but it suppose to be at 1066mhz what you can do then is clock the ram speed separately and raise it to 1066mhz. A good tip is to overclock one part at a time as then if a problem occurs you know where it lies. I know that this might be confusing to some of you especially people who have not done it at all so I found another guide that might help.

Finally the final result, how you calculate it is 250mhz x 15x multiplier = 3.7ghz cpu

There you go guys make sure to check out how to overclock with multipliers as theres some useful info in there. Hope everyone has fun overclocking and be careful not to burn anything up. GOOD COOLING IS NEEDED !!

Link to Overclocking using Multipliers


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