a li'l help with celeron 300a O/C??

[technoman28]

Hi all. firstime here, but love this site so far. Yeah, i know it's late to start tryin to overclock my malay 300a celeron, but since i wanna upgrade past 1 Gig soon, i figure it's o.k in case i fry anything.

I've just upgraded to the latest bios on my abit BH6 rev.1 MB and tried to boot my system at 100MHZ x 4 and 4.5 - pci bus at 2/3 with no success. At 2.3v, my system finally boots past the windows 98 r.2 screen, but then gives me an message saying there is a windows protection violation error & to restart. Step by step confirmation hangs after loading himem.sys driver. Anyone experience anything similar? I really wish now i had done this when this was the hot o/c item at the time so there might b more info still around.

Could the prob be crappy memory? I have 64 MB of generic 100 mhz sd and i tried adjusting cas latency between 2 & 3 with no effect. Oh yeah, i did thermal grease my chip with dual fan heatsink. Don't know what else to try, any suggestions would b great!! thanks, T.M

 

[Nick Stone]

You want the AGP/FSB set at 2/3 and the PCI/FSB ratio set at 1/3 in case you don't have it set that way already. Can you increase the cooling by leaving your case cover off and pointing a fan toward the inside of the case?

 

[technoman28]

OOPS!! My Bad. I meant i set the agp bus to 2/3, not pci. actually, i'm not sure what i set the pci bus to. I downloaded the bh6 manual here at work and it seems the fraction after the 100 mhz setting is the pci bus speed?? Might have been at 2/3 -if that option is even available. Can't wait to get home and find out. Would b great if that was my mistake and things then worked, but thanks 4 the tip Nick!!

ps- i will leave the case off etc, but i thought that sort of overheating would only affect stability after the cpu's been running awhile. I'm struggling just to get win-doze to boot!

 

[pizon]

Make sure speed error hold is set to disabled in the bios when overclocking. good luck.

 

[Bartman]

Welcome to Anandtech.. may I be the first to invite you to join Team Anandtech's OGR team? I'm sorry that I can't explain more but if you swing by the distributed computing forum they would me MORE than happy to help you out, just ask.

Bart

 

[Chuffmaster2k]

Did you up the voltage at all? The processor probably needs more voltage to get a higher speed. I do not remember the default voltages. Good Luck.

 

[they call mr big]

the PCI divider should be set at 1/3 at 100 mhz bus. what case cooling do you have??? I had the same problem with my 566 until I got gorb and couple of 120 mm fans in the case, now at 850 mhz stable. good luck