Underclocking - help

[Guest]

I've heard plenty about overclocking a cpu, though I have never attempted it. My question is - can a cpu be underclocked? If so, that is what I need to do.

 

[bront]

Yes, it is posable, you simply turn down the FSB.

Why do you need to underclock a CPU?

I do not like it Tom you see,
I do not like green PCB.

 

[Guest]

I have a motherboard with a 200mhz max. fsb speed. I just ordered a 1.33ghz 200mhz fsb processor from chipmerchant and they sent me a 266mhz fsb chip. I want to know if I can use that chip on my board.

 

[Raystonn]

If your board will not work at 266MHz, then you can run it at 200MHz. Your processor will then be running at 1GHz. If you want to be able to run the processor at the proper 1.33GHz clockspeed then you will need to increase its multiplier. That may require 'unlocking' the processor, if it is not already unlocked.

-Raystonn


= The views stated herein are my personal views, and not necessarily the views of my employer. =

 

[Guest]

that's good news.

does anyone know off the top of their head if there is a good article that tells how unlock the thunderbird, figure out the multiplier, and so on. Am I going to have to mess with voltages and stuff also?

 

[Raystonn]

You will not require any voltage modifications, as you will still be running the processor near its rated clockspeed, at 1.3GHz after changing the multiplier. I recommend you start by changing the multiplier in your system BIOS to see if it works. If not, then explore unlocking.

-Raystonn


= The views stated herein are my personal views, and not necessarily the views of my employer. =

 

[bront]

Sounds like someone goofed. A 1.33 GHz chip MUST be a 266 FSB (10x multiplier at 133 doublepumped). You can't get the .03 without it. I would return the chip to the company and make sure you get what you need. You want a 1.3 GHZ chip at 200 FSB (13x multiplier at 100 doublepumped).

You can run the one you have at 100, but it will only run at 1.0 GHZ

I do not like it Tom you see,
I do not like green PCB.

 

[Guest]

excellent news. Thanks Raystonn.

 

[Raystonn]

He can simply increase the multiplier on the one he has from 10 to 13. This will give him a 1.3GHz processor. I am sure the price difference between the two actual processors (1.3GHz and 1.33GHz) is not as much as it would cost to ship it back to the company.

-Raystonn


= The views stated herein are my personal views, and not necessarily the views of my employer. =

 

[Guest]

so is there any problem with setting the multiplier to 13x and running at 1.3 - I'm not to concerned with the 30 mhz difference. I wouldn't mind having this processor around when I upgrade the motherboard.

 

[bront]

Shouldn't be given it's running at almost the same speed.

I do not like it Tom you see,
I do not like green PCB.

 

[Guest]

Well then I'm off in search of some over-clocking guides so I can unlock this thing. Thank you both for your comments.

 

[Raystonn]

Sure thing. By the way, I just checked <A HREF="http://www.pricewatch.com" target="_new">http://www.pricewatch.com</A> and found that your 1.33GHz/266MHz FSB processor is actually $6 cheaper than the 1.3GHz/200MHz FSB processor. You saved yourself some money and have a better processor.

-Raystonn


= The views stated herein are my personal views, and not necessarily the views of my employer. =

 

[bront]

Check out some of the overclocking bulliten boards. The would probably have writen guides with pics.

I do not like it Tom you see,
I do not like green PCB.

 

[Matisaro]

Set the fsb at 103/206mhz, there is a 99.9999999% chance it will work perfectly fine and it will give you your full rated speed.

"The Cash Left In My Pocket,The BEST Benchmark"
No Overclock+stock hsf=GOOD!

 

[Raystonn]

That would actually give him a speed of 1339MHz, rather than 1333.33333 (etc.) MHz. I agree it should work fine though.

-Raystonn


= The views stated herein are my personal views, and not necessarily the views of my employer. =

 

[kief]

If you bother to unlock I bet itll run at 14x easy with no mods =) 1333/133 is as hot as 1400/100....

Jesus saves, but Mario scores!!!

 

[Matisaro]

Um, No it isnt kief, 1.33/200 is the same temp as 1.33/266, the core is operating at the same speed in both cases.

"The Cash Left In My Pocket,The BEST Benchmark"
No Overclock+stock hsf=GOOD!

 

[girish]

Wow Ray! You are becoming an AMD expert!

Modulus, what board do you have? I am sure that board will let you set the 266 MHz FSB quite easily, if it doesnt then you have to go with the multiplier trick.

girish

<font color=red>Nothing is fool-proof. Fools are Ingenious!</font color=red>