Overclocking a Celeron

[suprsheep2]

I have a 766 celeron (66x11.5) running on an abit VH6-2. I have been able to get it to run stably at 1138.5 MHz (99x11.5) This is at 1.85v, my chip is normally supposed to be at 1.7. Once I put the FSB at 100 it just won't boot even with 1.9v. I know it will work at a higher speed if I could get the voltage up to about 2.0v or 2.1v. But my motherboard won't let me up the voltage anymore. Is there anyway to unlock this? Please let me know.

[Sterling_Aug]

If you push it any higher, then you may fry your processor.

Is it worth it?

[suprsheep2]

Of course it is, I only paid $44 for it, and it won't damage any of my other parts (I've made sure of that)

[Imperion1]

Raising your FSB speed also raises the bus speeds for the AGP slot, the PCI slots, and ram slots. So, you're not just overclocking the CPU. Also, your CPU may not be capable of higher speeds.

[suprsheep2]

when my FSB is between 66 and 83 the external clock ratio for pci is 1/2 and agp is 1/1. Between 84 and 123 the ratio for pci is 1/3 and agp is 2/3. Between 124 and 200 the pci is 1/4 and the agp is 1/2. so by running the FSB at 100 it is doing no damage to any parts except the processor.

[gateke]

To be exact: at 66 mhz fsb pci 33 mhz
at 75 mhz fsb pci 37,5 mhz
at 84 mhz fsb pci 41,6 mhz
at 100 mhz fsb pci 33 mhz
at 133 mhz fsb pci 44,4 mhz
it doesnt indeed harm the processor

i've got myself a celeron 733 that i can overclock
to 916 (84 fsb) but i can't take it to 100 mhz either! Strange i think because i thought the celeron did 'overclock'(= 100 mhz) very well
and i tried many slotket cards with the 100mhz option (jumpersetting) but the computer would't boot.
I tried another slotket card where u can change the voltage via jumpers until 2.3 v but nothing again :( ,( i didnt go further than that because i was afraid to harm the celeron)

Well then there was also that program called 'softsfb' i tried where u can then change the FSB frequency in windows without rebooting. My system hanged up at 100 mhz :(
Maybe u have more luck , let me know!

Maybe the celeron is fsb locked for 100 mhz and higher ....


Gateke

[Dreadnaught]

I have a Celeron 300a that i overclocked to 450 just by changing the fsb to 100. I also have a Celeron 633 that is running at 950 by changing the fsb to 100.

I'm running an Abit BX6 Rev 2 running the CPU softmenu Ver 2. If you enable the speed error hold it WILL NOT boot. It should say something like "CPU unworkable" or something similar.

By disabling the speed error hold you should be able to go to 100 fsb. Just pay attention to the temps for awhile. Here's a link to veiw recommended temps from Intel, it's down the page a little so scroll.

http://support.intel.com/support/processors/celeron/24767.htm

Later...Paul

The link looks strange but it does work!!!

[wizstix]

Any of you guys tried an aftermarket cooler ?

I have a celeron 733@1000 (100 fsp@1.85v) and a celeron 800@1256@1.90v. Both have dragon orb 3 coolers attached.

Having said all this, my board will support up to 2.05v and ram will happily run at 156fsb. So if all else fails....try a different board (the asus cusl2-c and abit's sa6 will also allow you to run your ram fsb and cpu fsp independantly of each other) just to see what you 'lil 766 will run at. Kinda keen to know myself hehe

Have fun and stay cool.
Wiz

[Dreadnaught]

Wiz, having an Abit board myself I believe his problem is in the CPU SoftMenu.

I'm not having any heat issues to speak of, my Celery 633 runs at around 39 degrees C. I don't have any system hangs or anything like that.

But I may just have to look into one of those Dragon orb coolers. Do ya really like it?

Later...Paul

[Lord Sech]

Sheep...

I have the same feelings as you. I paid $50 for my celeron 700 about 5 months ago so figured if i fry it...What difference does it make???

Anyway, As it was already suggeseted an upgraded cooler would be a great idea. Or more case fans for a better air supply. The reason Intel's chips o/c so well is because unlike AMD (Yes i still love AMD) they can disperse heat a bit better.

In my opinion you could hit 1.2 with your current voltage and not be at risk for frying it ONLY after better cooling.

BTW, i have my 700 @1130 (10.5x107) with a vantec cooler and have not had a BSOD or any glitches since day 1.

-Lord Sech

[wizstix]

Dread.

Yeah mate, the dragon orb 3 does a really nice job of keeping my cpu's below melting point :-)

After applying a 'lil arctic silver and the orb my cpu temp dropped by 6-7 C. When you pushing the limits that 6-7 makes a huge difference. It's saved me a ****load of bluescreens anyhow hehe

Have fun and stay cool.
Wiz.

[suprsheep2]

I have a thermaltake golden orb, with arctic silver 2. When I have the 766 o/ced to 1.1Ghz there little to no heat increase. I still runs under 80 degrees F (27 degrees C). would I be better off buying a new processor and overclocking it? I think the highest that it supports is a 1Ghz P3 and a 950 Celeron. any suggestions?

[suprsheep2]

I just got and email back from abit saying that I can use the 1.1Ghz P3(100FSB x 11) I think this would be a great overclocking processor, Would it be worth paying about $150 to get this processor? I think I would be able to overclock it to about 1.4Ghz. I need advice because I don't think the celeron can go any higher

[Dreadnaught]

SuperSheep I don't know if you'd be ab;e to o/c past your mobo's max speed. It's something you need to look into before spending the cash on the cpu.
Check here to see some pricing for new Mobo and CPU combos. (http://www.pricewatch.com/1/306/4238-1.htm)

Later...Paul

[wizstix]

suprsheep2 !!

If your mainboard supports a 1 ghz cpu or higher then it at least supports up to an 11x multiply setting. (Cele 1.1 = 11x100mhz)
I've always had problems in the past highly overclocking cpu's with multiply settings over 10x, (cele 1 cpu's mostly) but some increase has always been possible.
If I were to take a wild guess, i'd say a cele 1.1 would clock to at least 11x115...maybe 11x120. So anywhere from 1265 - 1320 is what i'd be trying for :-)

Stay Cool.
Wiz.

[suprsheep2]

my multiplier right now is 11.5x and the FSB is 95, my motherboard can handle up to 200Mhz, so I don't think I need to worry about a new motherboard