OC cel 400 to 450 and system crawls

[Strider]

If anyone can help out with this, it would be greatly appreciated.

I have a cel 400 that I want to run at 450. This is not a huge leap, and I don't expect any problems with the cpu.

What is a problem, is that as soon as I up the FSB to 75, the system begins to crawl. It take about 5 minutes to get into win98, and once inside everything is horribly slow as the HD is contantly being accessed. If I boot into safe mode, everything seems fine.

The board is an ASUS P2B, with a G200 (no oc there), sound card, modem and PC100 ram. The hard drive is a Maxtor 6.4 Gig. I couldn't find any conflicts while the system was oc'd. DMA was still active, and so was AGPx2.

Any ideas?

[Helmchen]

Perhaps it's the hd. My IBM DHEA 6.4 doesn't like a OCed PCI, while my IBM DTTA 8.4 has no problem.

Helmchen

[Strider]

Well, if it is the hd then I am pretty much out of luck. The thing I don't understand is why such a huge performance difference between safe and normal mode.

[Buuri]

Safe mode doesn't use IDE mastering. Just slow standard access.

_
B

[This message has been edited by Buuri (edited 09-09-1999).]

[Maggi]

Disable UDMA in your MoBo bios ...

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CU,
Maggi
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Asus P2B-DS @ 103MHz FSB
2x P3-450 @ 464MHz
512MB CAS2 SDRAM
Millenium G400 32MB DH

[Strider]

Thanks for the info guys. Is it worth running an OCed system if UDMA must be disabled? And is the inablity to run with UDMA on non-standard FSB settings HD specif.

As Helmchen pointed out, one HD had problems, but the other ran flawlessly. So some HDs don't work with UDMA on OCed systems while others do?

If I have two HDs in the system, can one run with UDMA while the other runs without bus mastering? I am planning on adding a second drive but have no intentions of ditching the current one.

[paul]

maybe you shouldn't overclock it

[Wombat]

Not overclock a system? What a silly idea.

Of course you can run one with UDMA, and not the other, but it might be wise to put them on separate IDE channels first.


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K6-2/350@400, 503+ rev 1.2a, 128MB PC100 RAM, Millenium G200, RH6.0 w/ 2.2.12, Win98, and too many classes