Question about overclocking Celeron 566

[Doobu]

I was trying to overclock the Celeron 566 on a Abit BX6 2.0 version and it does accept Coppermine chips because it runs reliably at 566 MHz, but I was wondering does it support the overclock to 850? I checked the latest BIOS and they don't have any support for 850 at least it doesn't mention it. The highest it seems to support is 600Mhz .... is that true and is there any way to work around that because when I tried to overclock the RETAIL Celeron 566 to 850MHz on an Abit Slotket I finally got it to work at 1.65V (I think that's too high don't you think? Should be easier than that right?) but it didn't recognize it as 850MHz... it still recognized it as 566. Anyone know what's going on?

 

[shawn_16]

how do you know it's running @ 850? If you know it's running @ 850 and it doesn't display it "correctly" when you puter posts, don't worry about it

 

[Doobu]

Well I changed the jumper on the Abit Slotket to 100MHz and change the voltage to 1.65V and left the jumper as Coppermine setting and when it booted to Windows I used WcpuID and it said the speed was 566MHz so that's how I know it didn't overclock to 566. Like it says after the POST does not recognize CPU press F1 to continue or Del to setup or something like that.

 

[compuwiz1]

You dont need to set jumpers on the slotket. Set it to 100MHz fsb in bios and bump voltage up to 1.75v and boot.

 

[Doobu]

So leave the jumper on the bus at Auto? and leave the jumpers on the Voltage as Auto? and change it through the BIOS right? Isn't 1.75V a little too much voltage for a 566 to 850 jump on a Retail Celeron 566? I thought most Retail 566s reached 850 on the default 1.50v or at most 1.65v

 

[KR]

You got it, make the changes in the bios. The whole reasoning behind the soft bios settings is to allow non-standard settings without having to change jumpers - or even open the case once the stuff is installed. 1.75V is not too high provided you have reasonable cooling in your case and a good CPU Heatsink and fan installed. Your success may be limited if you are using a retail chip with the retail heatsink and fan. If it's an OEM chip and/or you've installed an after-market Heatsink-Fan, do be certain that you have applied thermal heatsink compound to the CPU/Heatsink where they join.

 

[compuwiz1]

You can always lower the voltage if it is stable at 1.75, but that is a good place to start, in case it wont post. Otherwise sometimes you have to clear the CMOS to restore default settings.

 

[klod]

The part you mentioned about "Post does not recognize CPU press F1 to continue or Del to setup" sounds like you have Speed Error Hold enabled in your bios. I recently did this with my cellery 600 @ 900 on an Abit BH6 with MSI slocket. Just a thought.

 

[Supradude]

After trying the above methods, if it's still not working .... you should consider making smaller clock increments, although most 566's make 850 handily and readily, there are some unfortunate few that clock less or maybe not at all...

 

[spamboy]

A lot of people (myself included) run their 566's at 1.90V (with good cooling, of course). Intel lists the "max" spec for coppermines at 1.85V of their website, and hey, if it burns out, it will be time for a CPU upgrade anyway.

Oh yeah, and my retail 566 needed 1.8V to be truly stable at 850, so condsider yourself lucky.

 

[heng1028]

i have mine running at 875 (1.8v). the temp never over 38celcius with artic silver and chrome orb at full load (RC5 and SETI at the same time)

cool...