Help OCing Celery D 2.8

[ArchangelM]

Ok I have a Celeron D 2.8 335 478 w/ a machspeed mobo PM9MS(Via PM800 North chipset). Others told me it didn't have a lock on it and i'm wondering how far i should or shouldn't go. I have some fairly valuable things on the PCI(HD,CDRW,Sound) that i don't want fried. I'm am a newb with knowledge but little experience with overclocking.

Also i would like a proggy that tells me what my PCI/AGP freqeuncies are...if there are any for my mobo.
Here are the brands:
Intel Celeron D 335 2.8 ghz
machspeed PM9MS (Via PM800 north)
Antec SmartBlue 350 watt
ULTRA FIRE 3,200 rpm Aluminum Heatsink(nothing special, does its job for $15)
ULTRA 256mb pc2700 RAM
another stick MUSHKIN 512mb pc3200 RAM(running at 333 for ULTRA ram)

[larva]

Honestly, that's a really poor motherboard for overclocking. All you can do is try it and see what it will do. It's almost impossible to predict the results from here. I'd simply advance the fsb slowly and see what happens. If you can increase the cpu voltage, try upping it a tiny bit, but don't go crazy.

[ArchangelM]

My friend actually got a 2.0 to a 2.6 with this mobo stable. But i didn't really have overclocking in mind when i bought it so no biggy. It doesn't void the warranty to overclock this board either. so i was wondering why wouldn't it have a lock on the pci/agp? especially if the onboard sound will be the first to go...

do you know where i can find a PCI/AGP freq. program?

[batboy]

VIA chipsets until very recently just didn't have PCI locks. Don't know of any monitoring programs that will give you PCI frequency, but you can calculate it. Generally anything from 100 FSB to 132 FSB will have a 1/3 divider, 133 to 199 will be 1/4 divider, and 200 and above will have the 1/6 divider.

Usually running the PCI bus up to about 37 MHz is ok (your mileage may vary). Above that you might begin to experience instability. I doubt you'll fry anything though. Worse case would be data corruption on the harddrive.

Ok, so 37 MHz PCI bus speed would be 148 FSB with a 2.8 celeron D (3.1 gig). Too bad you didn't get a 2.4 or 2.53 Celly D, so you could hit 200 FSB and get the PCI back in spec.

[ArchangelM]

bummer... so my max oc is 3.1? I don't use onboard sound anymore. i just got a SB Live! 24-bit. It's mostly my Hard Drive that i don't want to give. I need it. my next alternative is a 6gig WD caviar in my closet.

So if i somehow miraculously got my FSB to 200mhz the PCI clock would automatically switch to a 1/6 divider?

How could getting a 2.4 or 2.53 allow me to get a FSB of 200 mhz?

[ArchangelM]

also i thought that 166 FSB had a 1/5 divider. I could be wrong but, i thought i saw it somewhere. pull out the calculater it makes sense.

it just seems like there's a huge gap b/w 133 and 200mhz than the small gap b/w 100 and 133 mhz.