Overclocking Nubee

[andy04]

I want to try overclocking and have read a few beginers guide and I am confused. Most af them explain about the multiplyers and stuff. I have a few specific question.

1) When I overclock my CPU will the RAM and Video Card and everything else in my comp like NorthBridge and SouthBridge run faster and hence hotter too or is it possible to overclock only the CPU?

2) Is my mobo overclock capable - Intel D945GNTL - are all mobos capable ?

3) Has it to be done from BIOS only or can it be done from within the OS ?

4) is there a beginners guide which will spoonfeed - go into the bios, change XXXX... something like that ?

 

[raincityboy]

1) Yes it OCs your system, excluding your gpu. Only if you have a cpu with an unlocked multi
2) dont know
3) You can do it in windows, but I only do it in bios myself
4) You would need to find one for your mobo...

 

[Smartazz]

1. What raincityboy said.
2. I doubt it, I couldn't overclock my old Intel board.
3. I use the bios with my AMD rig, but windows software works too.
4. You need to find one for that specific mobo, but I would suggest looking at the overclocking guides on this site.

 

[andy04]

Thanks for the help...

Now one more question - If the Memory get overclocked too - do all memories work with overclocking - If not then is there a specification I can look up on my module to figure it out ?
I am using - GEIL 1GB 667 PC25300

 

[raincityboy]

Originally posted by: andy04
I am using - GEIL 1GB 667 PC25300

:Q that should oc pretty good.

J/k there are no guaranties in OCing. Some RAM does OC better then others. Just find your RAMs limit, and use divders to keep it as high as you can.

 

[domicron]

Your processor is multiplier locked. This means that the only way you will be able to overclock is by increasing the bus speed of the entire system.

Processor speed = mobo bus speed x processor multiplier

To make this more complicated, the motherboard's bus speed is also used to determine the speed of your AGP bus, your PCI bus, and your RAM bus. Each of these is actually also set by a multiplier, though it is a fraction.

Note that the PCI-Express graphics option is not dependent upon the motherboard bus as it operates along different principles, and thus makes it easier for overclocking - one less thing to worry about.

For example...

Let's assume your processor is locked at a 5.5x multiplier. And that the bus speed of your motherboard is 400mhz.

Processor = 400 x 5.5 = 2200mhz

And, you are using DDR400 ram which operates at 200mhz using a 1/2 multipler.

RAM = 400 x 1/2 = 200mhz

Now, let's say that to overclock you decide to raise the motherboard bus speed to 410.

Processor = 410 x 5.5 = 2255

RAM = 410 x 1/2 = 205

And let's say you get a little overzealous and up your mobo bus speed to 430.

Processor = 430 x 5.5 = 2365

RAM = 430 x 1/2 = 215

At this point, you will probably run into problems as the RAM frequency has gotten too high and will result in either no-post or stability issues when trying to load windows. Windows may hang, or you may get a BSOD.


Okay, so this has been a really basic example of overclocking. There are more considerations involved, but it depends a lot on processor, motherboard, and RAM being used. If you could supply some more detail here, i'm sure someone here could point you in the right direction.

 

[Smartazz]

Good explanation domicron.

 

[Boyo]

You can also overclock your system from your OS if you use a program like ClockGen.

 

[andy04]

Really great and a very helpful explaination domicron. Thanks you very much. :thumbsup:

But that again leads me to some more questions.

1) When you said "Your processor is multiplier locked." did you mean that specifically MY CPU - Pentium D 945 or are you just giving an example?

2) You said that PIC bus' clock speed also increases so does that mean my PCI devices would be effected ? I have a Linksys Wireless G adapter and a Firewire card... Do I need to worry about them ?

You can find me exact system config below

 

[fzkl]

1) Your CPU is multiplier locked and so are many others. Only the extreme editions, X6800, QX6700 are multiplier unlocked from Intel. On the AMD side, on the Athlon FX series is unlocked. When the multiplier is unlocked you can overclock by changing the multiplier value in the BIOS only if the BIOS provides such an option.
2) If the PCI bus clock speed increases, devices in the PCI bus will be affected. I think some BIOSes have a PCI lock in them to prevent this from happening.