Celeron 766 overclock

[homicsbane]

I am going to try overclocking my celeron, but i need to increase the fsb on it. I just want to know what fsb settings would be the safest and what impact would it have on the rest of my system?




Thanks


Homicsbane

[CrystalMethod]

Need a lillte bit more info on your system specs before we can help you. welcome to the forums btw!

[homicsbane]

Celeron 766mhz (66mhz FSB)
Gigabyte motherboard GA-6VXC7-4XP
256mb PC-133 SDram
Voodoo3 2000 PCI (I know, i know... i need an agp card...)
Soundblaster PCI 128
D-link 538TX Ethernet card
1.2gb hard drive
5.1gb hard drive
12x10x32 CD Burner

[outhouse]

Well first you need to try and see how high you can go and keep it stable, start out slow working your way up a little at a time. also raising CV [core voltage] to your CPU as long as you can keep your temps down if you start raising your CV you will need better cooling maybe a little case cooling [a few fans] and a new HSF [heatsinkfan] for your CPU when overclocking its very important to keep your temps down. There is no real answer to your question because all CPU's will overclock differently and also after you have run a while and burned your CPU in you will be able to go higher. Overclocking is a little more then raising FSB and CV if you new to it i highly recomend that you read through the tips section i still go through them and pick up new ideas.

[Monaco]

A celeron 766 normally works at 11.5 x 66, right? Most boards have 66, 75, 83, then 83 to 150+ in smaller increments.
That means your choices are 766, 862, 954, and 954 on up. Most new celerons go to 850, but not all go to 950. I would try to work in the 90mhz FSB range, as that is about the most you are likely to get out of it without serious cooling. But if I got it to work at 83FSB I would be happy.

The multiplier on a 766 is just a real pain in the rear to work with.
I would do everything outhouse mentioned but don't be too surprised if it don't quite get to 100FSB.

[homicsbane]

I read in the manual that if the FSB is 75 or 83, then the pci will be at 44mhz. Is that bad? the only other FSB's that keep the pci at 33mhz is 66 (of course), 100 and 133. Will 100 FSB hurt the chip? or is it just on the motherboard?

[The Doors]

Hi homicsbane,
Yes, 75 & 83Mhz of Fsb, like many others, generate not standards Pci frequency that can give probs with Pci cards, especially Nic, and possible probs with the older Hd's (Fat Corruption!!!).
The best way is to check your chip temps @full load (under 100% work) with MotherBoardMonitor, and if under 40-45 degree C, rise the Fsb from 66 to 100Mhz, and also a little the Vcore if not stable.
This chip works really good at this freq. like you can check looking the Cpu database on the Home page.

I hope it helps you :-)

[FrankMasterFlash]

Do you know what stepping it is?
The default voltage or the S-Spec?:cool:

[homicsbane]

it is family 6 model 8 stepping 6

[Mr B]

686 is a cC0, if memory serves correctly.... =) You got a good start, there!

[outhouse]

Originally posted by homicsbane
I read in the manual that if the FSB is 75 or 83, then the pci will be at 44mhz. Is that bad? the only other FSB's that keep the pci at 33mhz is 66 (of course), 100 and 133. Will 100 FSB hurt the chip? or is it just on the motherboard?

44 is a little high but some people can and are running that high i'm at 43 with no problems at all. If you go to high or end up with unstability you may fry your HD but it will make noise and let you know it does not like the out of spec speeds as long as you turn it down your fine and you should not hurt anything so there is little risk of damage. 100FSB will not hurt the CPU it will either work or not, I still think its best to work your way up slow and try different settings when i first started i could only get up to a certain point and then i had to get creative to figure out how to get it higher [cooling mods burn in ect ect] so i think its safe to say that [generaly speaking] you will not be able to max your CPU out all at once, with a little luck and some help from others you may get into the 100's but who knows until you try you may just pop rite into 100 allot depending on luck with your components.

[homicsbane]

Ok, I got it to 863 and the cpu temp didn't increase at all, it has been running like this for months. Would it be safer now to go up a little bit higher? maybe 83 or 100fsb?

[batboy]

Overclocking your system to 75 FSB is no problem. A nice and easy no-brainer overclock. However going to 83 FSB sometimes works or sometimes can cause instability in some systems because the PCI bus is at 41.5 MHz (not 44 like you posted previously). However, try it if you want, the worse that will happen is it'll scramble your harddrive (that's happened to me a couple of times and I had to reformat). Usually, if it's unstable it will just not start Windows or if it does it might crash, lock up, or BSOD during usage. However, you might as well forget 100 FSB, I really doubt that will happen without supercooling and lots of luck.

[Peter007]

Too bad you have the Step cC0 Celeron 766

I have a friend who have a cD0 Celeron 766 and overclock to 1346mhz :)