Overclocking celeron 400

[ltdata_us]

I try to overclock my celeron from 400 to 450. When i load windows 98, there is no problems even when i use some programs word, excel, quicken.....Then i reboot and i have a message "invalid disk system" or windows
98 cant find some files in system.ini

I have:
-celeron 400
-128 ram
-hd: seagate 8.4 Go (st38420A)
-video card:guillemot xentor 32
-motherboard: msi-6163

[K4]

o/c 400 to 450 using FSB 75Mhz should run really smooth with the default settings and shouldn't do much harm to your system. As much as it seemed like that speed corrupted your HD, it could just be a software problem.
Have you tried increasing your core voltage to 2.05v? or higher?

[Dave_B]

It appears that your hard drive can't hack the 37.5 MHz PCI clock. Some Seagates have this problem. Try unchecking DMA in the hard drive properties under Control Panel, System Properties. Many hard drives that corrupt or have problems with DMA on don't with DMA off. If it's OK then, get a new Quantum or Western Digital hard drive; they both O/C fine up to the 83 MHz FSB. You should get a new hard drive because O/C'ing your CPU while crippling the hard drive by turning off DMA doesn't make a lot of sense.

[ltdata_us]

I try with 2.10 Volt but it doesnt work: My hd crash. Also, my hd has 5 partitions. When i overclock the celeron, it corrupts files in all the partitions i accessed during the overclocking.

[Yoman]

looks like your hdd doesn't like 37.5mhz pci bus speed....try 100mhz bus so your pci will run at 33 default by increasing voltage and get a better heatsink.btw,your cel400 is slot1 or socket370?

[ltdata_us]

Celeron is slot one.
And how do you change the bus speed?
I have an Award bios

[ltdata_us]

I try a 100 mhz bus speed and i have the same problem

[K4]

Try this:

1. Try FSB 92Mhz, which underclocks your PCI to 92/3=30.6Mhz.

2. Take out your HD, IDE cable everything, and put them back in carefully.

3. Re-format and Re-install your OS.

btw, could it also be a boot-sector virus?

[ltdata_us]

I cant have a 92 mhz bus speed( it is 75,83 then 100). So, i select 100 mhz * 4=400mhz
and i had the following error message: CMOS checksum error

[ltdata_us]

Also, i can overclock my celeron to 411 mhz with the following settings: 83 mhz/41 * 5=411 mhz.

Also, i notice that every time i format my hd(fat 32) i have the following message: recording bad clusters. So, I try with fat16 and i dont have this message.(5 partitions)

[K4]

You are aware that Celeron 400 has the multiplier lock on 6. In other words, you can only use 75x6, 83x6, or 100x6.. Any other Multiplier settings may cause problems. Blame that on Intel.

[Yoman]

how come you can get 411 by changing the multiplier??the multiplier is locked at 6.Perhaps you succeeded in changing it?????

[ltdata_us]

I can overclock my celeron to 411 mhz(68*6)
Also, i send a e-mail to seagate and they say:
"That would be an issue with your controller card. The drive does not negotiate
with the pci bus only the controller.
This may be driver/or overclocking related. For further information you will
need to contact Microsoft and your motherboard manufacturer."
"This is an operating system issue. The drive only stores 0's and 1's. Contact
Microsoft for further information.
If you are overclocking that may be the issue"