Overclocked P4 2.8C

[El_CID]

Hi,
As the subject says i have an overclocked P4 2.8C that i cant get to go down to its normal speed. I overclocked the FSB in the BIOS and put the CPU up to 3.0ghz and it performed flawlessly, but now it wont go below 2.84 and an 811 FSB. I just want to get it back down to its normal speeds, i never intended to run it overclocked permanently.

 

[pIII_Man]

are you saying your mobo is not letting you drop the fsb back to 200mhz...or even when you set the fsb to 200 (800mhz qdr) the system still runs at 2.84ghz...really that is such a small overclock it is most likly to be inacuracies in your clock generator

3 386DX-25's...12 volts...glue some ln2 and a wicked amount of overclocking and you get a willamantee minus 36 pins, 33.75 million transistors and a couple hundred mhz... 😎

 

[El_CID]

The mobo allows me to drop down to 200mhz but windows and intel's frequncy detector both show it at 2.84.

 

[pIII_Man]

dont worry about that...like i said clock generators are not completely acurate...let it be...

3 386DX-25's...12 volts...glue some ln2 and a wicked amount of overclocking and you get a willamantee minus 36 pins, 33.75 million transistors and a couple hundred mhz... 😎

 

[sonoran]

I wouldn't worry the least about running a 2.8 at 3.0. It is, quite literally, the exact same chip design. The <b>only</b> difference is what the multiplier was locked in at.

 

[Cloaked]

that is not totally true. A 2.8c was made to run with a 2oo bus speed and a 14 multiplier, while a 3.0c is a 200 bus and a 15 multiplier. If you overclock a 2.8 to 3 ghz, you will have a ~214 bus on a 14 multiplier. And when you increase the system bus, memory/agp/pci frequencys go up, (and unstable too) So while the two chips might be from the same batch of silicon, neither of them were designed for a 214 bus, and the memory and other componients in your box were not designed to deal with that frequency either. That said, if you have decent cooling, the extra 40mhz will probably not make a differece in stablility, but might make the proc fail prematurly (even if that means it will only work for 7 years instead of 10,by which time you will probably have a new comp anyway.)

 

[pIII_Man]

obviously you have been living under a rock for the past year...the latest nvidia and intel chipsets have a locked pci/agp bus...instead of using an fsb divider i beleive they use their own clock generators...

From what i know bus speed has little effect on the stability of the cpu...just memory and chipset...i beleive if you had a good enough board and memory you could run a unlocked 3ghz cpu at 1x 3000mhz....So overclocking to 3ghz on stock voltage will not shorten the cpus life (at least no less than an intel 3ghz factory cpu)...

3 386DX-25's...12 volts...glue some ln2 and a wicked amount of overclocking and you get a willamantee minus 36 pins, 33.75 million transistors and a couple hundred mhz... 😎