OC a celeron 633MHz

[n1ck0s]

i am really new at this so please be patient.

due to the limited options i get with my m/b, the only way i can oc my cpu is chaging the FSB from 66MHz to 78 or 83MHz. i read at some previous posts that 83MHz is a bit too much while 66-75MHz is rather ok.

what about 78MHz? i should also mention that in order to get 78Mhz for the FSB i must first disable "Clock Spread Spectrum" in BIOS which i have no idea what it means.

so i need to ask the following:

1) is there a possibility of a PCI or AGP card being damaged?
2) someone told me that i might have problems with "data corruption" with my hard disk drives. is that correct? how can i diagnose such a problem if i decide to keep 78MHz?
3) will my CD-RW be affected or even damaged? will my DVD-Rom overheat (it gets really hot when watching movies)?


my system configuration is:

Celeron 633Mhz (9.5x66MHz)
QDI Advance 9
2x128 PC133 CL2
CD-RW Plextor 2410A
DVD-Rom Pioneer 106s
Seagate 8.4GB + Quantum Fireball 3.2GB

thanx in advance.

[batboy]

Welcome to the forum. I'll take a shot at answering your questions. You sure the FSB choices aren't 66, 75 and 83 MHz? I've never heard of 78 being a normal option. Regardless, it'll probably work ok anyway if your cooling is ok.

1) The chance of damaging a PCI or AGP card at the clock speeds you mention is extremely rare. Usually, if the card(s) don't like being overclocked, you'll just experience instability (lock ups, crashes, and/or the blue screen of death). While this is annoying and requires a reboot, it doesn't cause permanent damage.

2) Data corruption in the harddrive sometimes happens when you're doing extreme overclocking. At 78 FSB, I would think you'd have little to worry about. Most overclockers learn to keep important data backed up. At worse, you might have to reformat your harddrive and reinstall Windows. Running a program like Norton Utilities on a regular basis can help keep your operating system and harddrive "cleaned up" and working good.

3) I've never had problems with my CD-ROMs since I've been overclocking. You're really running the controller out of spec, not the drive itself. I don't have a DVD so I can't comment on that.

[murdoch]

83 is possible. The chip will do it, its your motherboard that might not like it. I had older equipment than you and it booted fine with that chip. If anything your agp might not like the higher rate But that would depend on your card, as well alot of nic cards are finiky about high bus speeds the jump won't kill anything just won't work if not stable 75 would be real easy for that chip I had mine at 100=950 at 1.80 volts flawless.

[n1ck0s]

thank you both for your replies.
You sure the FSB choices aren't 66, 75 and 83 MHz? I've never heard of 78 being a normal option. Regardless, it'll probably work ok anyway if your cooling is ok.
other people have told me that too, but its 78MHz for certain. i must say that this option (78MHz) is not available until i disable "Clock Spread Spectrum" (which i would really like to now what it does btw). my "normal" options are 66, 83MHz.

[Yodums]

Can you hit 83?

Try hitting 83 and bumping up the voltage if you need..

And make sure those temperatures are monitored.

[batboy]

I've been accused of being very conservative when overclocking, but on the other hand, I've never fried anything yet either. I generally recommend to the newcomers to walk before you run. Usually 75 FSB (or 78 in your case) is fairly straight forward and pretty easy to achieve with little if any cooling mods. But, 83 FSB sometimes starts heating stuff up (therefore needs more cooling) and causes the PCI bus to run quite a bit out of spec (more chance of instability). I'd try the 78 FSB first and see what happens. Monitor temps and test for stability. As you get better cooling and more confidence, then maybe try the 83 FSB if you want. But, I'd wait until you got a better CPU cooler at least.

[wayshot]

Originally posted by n1ck0s
other people have told me that too, but its 78MHz for certain. i must say that this option (78MHz) is not available until i disable "Clock Spread Spectrum" (which i would really like to now what it does btw). my "normal" options are 66, 83MHz. [/B]

My Aopen AX63 Pro 'board does have 32 FSB settings from 66 to 155 MHz. Some frequencies are available with Spread Spectrum ON, and the other ones when set OFF (apart from 66, 100 and 133 MHz, which are available on both settings).