Ndis driver crashes after overnight inactivity

[Voltaire]

I get Ndis driver crashes after I leave the computer on overnight, without being connected to the internet. This seems to happen with 2 of my previous NICs, too.
I used DLink528 and LinkSys PCI II NICs, which were totally unusable and then I switched to Allied Telesyn AT2500TX NIC. I get 95% stability (finally), except for that Ndis driver crash after an overnight of inactivity.
I am running PIII600E@800, with the PCI Bus is running at 33.25Mhz. So, I don't think overclocking is the thorn here.
I am running on Win98SE. Could the OS be the problem? I am using the latest driver for the NIC, too. Changing to WinME will help at all?
Any advice/comments will be really appreciated.
Thanks.

 

[obenton]

This can happen with power management if everything is not ACPI compliant, some functions not waking up properly from some power reduction settings.

 

[LordOfAll]

Just to rule out the oc issue why don't you set it to the proper speed and test it?

 

[Voltaire]

Hi, I have already tested it on default frequency, 600, with DRAM@100, PCI@33.41.
No difference at all.
As a matter of fact, if I ran the system at 800, DRAM@133, I have PCI running @33.25, which is a little lower than before.
Unless the motherboard is posting inaccurate PCI bus frequencies, I think it is pretty safe to rule out the OC issue.
Few months back, when I first bought this system, I heard on this forum that there were a few issues regarding power management and problematic powerups from standby mode. Perhaps this could be the problem... will try the latest mobo bios flash.
But what I really want to know is: If I changed the OS from Win98SE to WinME, would the system be more stable running DSL?

Asus P3V4X with 1.004 Beta 2 Bios(I think)/600E@800 133/33.25/Samsung PC133 Cas3 128MB/Hercules Prophet2 MX/SBLive! MP3+/IBM34GXP 20.4 GB/Allied Telesyn AT2500TX NIC