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solving the infamous KT133A PCI issues

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June 9, 2004 10:47:35 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Actually I've got a KM133A chipset motherboard, but the KM133A is
basically the KT133A with onboard video.

I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
settings, I've tried the VIA chipset drivers, but nothing stops these
corruption issues. PCI activity jams over each other, giving graphical
corruption and lockups.

Can anyone give me any more tips on what to do before I have to junk
this motherboard?

Thanks for any help
Anonymous
a b V Motherboard
June 9, 2004 10:47:36 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"Broken" <nospam@s.pam> wrote in message news:40C609C7.4732866F@s.pam...
> Actually I've got a KM133A chipset motherboard, but the KM133A is
> basically the KT133A with onboard video.
>
> I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> settings, I've tried the VIA chipset drivers, but nothing stops these
> corruption issues. PCI activity jams over each other, giving graphical
> corruption and lockups.
>
> Can anyone give me any more tips on what to do before I have to junk
> this motherboard?
>
> Thanks for any help
>

Could it be an irq conflict issue? Try putting your PCI cards into
different slots and see. Also make sure you're using the latest drivers for
all your PCI cards.

Regards,
Dave
Anonymous
a b V Motherboard
June 9, 2004 10:47:36 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

I don't have any tips for you but I'm using motherboards with the KT133A
chipset for over two years without corruption problems.

Bought two Asus A7V133's in february 2002 that had initially problems,
which ones I don't remember, but a few VIA drivers later they ran
without any flaw.
One of the A7V133's I had to replace last october, I replaced it with an
MSI KT7 Turbo2 which has the same chipset and is running without a problem.

To be honest on the A7V133's I ran RAID1 with the harddisks connected to
the Promise controller, I do the same on the MSI KT7 Turbo2 that has a
PCI Promise RAID card.


Broken wrote:
> Actually I've got a KM133A chipset motherboard, but the KM133A is
> basically the KT133A with onboard video.
>
> I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> settings, I've tried the VIA chipset drivers, but nothing stops these
> corruption issues. PCI activity jams over each other, giving graphical
> corruption and lockups.
>
> Can anyone give me any more tips on what to do before I have to junk
> this motherboard?
>
> Thanks for any help
>
Related resources
June 9, 2004 10:47:36 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

In article <40C609C7.4732866F@s.pam>, Broken <nospam@s.pam> wrote:

> Actually I've got a KM133A chipset motherboard, but the KM133A is
> basically the KT133A with onboard video.
>
> I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> settings, I've tried the VIA chipset drivers, but nothing stops these
> corruption issues. PCI activity jams over each other, giving graphical
> corruption and lockups.
>
> Can anyone give me any more tips on what to do before I have to junk
> this motherboard?
>
> Thanks for any help

The nearest Asus board would be a7v133-vm (KM133A chipset,
VT8365A Northbridge, evil 686B Southbridge). I thought the
Via 4in1 chipset drivers solved the problems, as much as
they can be solved. Some people still have problems, so
there are a certain percentage of boards that still have
problems. I thought one problem was disk corruption.
I don't remember reading about any graphics corruption.

You should uninstall/stop using any third party PCI
Latency patch. Try to use the Via 4in1 driver, and
let the Via supplied values drive the chips for a
while. Including both solutions means not knowning
just what settings are being used.

One post in Google mentions:

"You have to set the following parameters to ensure a save
operation of the VIA Southbridges (in particular the 686B):

PCI Delay Transaction = 0 (off)
PCI Master Read Caching = 0 (off)
PCI Latency = 0 (Values from 0 till 32 seems to be save,
all over 32 are not!)"

Of course, these settings just destroy performance. A PCI Latency
of 16 is about as low as I would want to go, as any lower than
that, video updates to the screen will start to stutter. A sound
card would have a hard time producing clean sound, when Delay
Transaction if Off (but you'll have to leave it that way, to
avoid disk corruption).

Your statement about similarity of Northbridges doesn't necessarily
apply, as a chip with built-in graphics is quite different from
one without graphics. The silicon die would be much bigger, and
build-in video functions make the Northbridge run hotter. You would
want to check that the fan is functioning, if there is one, and
that the Northbridge is warm to the touch, as that means heat
is being transferred successfully from the chip to the heatsink.
If the heatsink is cold to the touch, it either means the chip has
no appreciable heat output, or there is an air gap between the chip
and the heatsink.

Have you tried modifying any clocks on the board ? Maybe the
symptoms change if the FSB is reduced.

If you post back, include the model number of the board, as
it helps when Googling.

Paul
Anonymous
a b V Motherboard
June 9, 2004 10:47:36 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"Broken" <nospam@s.pam> wrote in message news:40C609C7.4732866F@s.pam...
> Actually I've got a KM133A chipset motherboard, but the KM133A is
> basically the KT133A with onboard video.
>
> I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> settings, I've tried the VIA chipset drivers, but nothing stops these
> corruption issues. PCI activity jams over each other, giving graphical
> corruption and lockups.
>
> Can anyone give me any more tips on what to do before I have to junk
> this motherboard?
>
> Thanks for any help
>

Check supply voltages
Check Ram & Ram Voltages
Check CPU Voltages
Check Heat of system (clean the heatsinks)

Shrug
Anonymous
a b V Motherboard
June 9, 2004 10:47:37 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

"rstlne" <.@text.news.virgin.net> wrote in message
news:6ytxc.163$iC5.26@newsfe5-win...
>
> "Broken" <nospam@s.pam> wrote in message news:40C609C7.4732866F@s.pam...
> > Actually I've got a KM133A chipset motherboard, but the KM133A is
> > basically the KT133A with onboard video.
> >
> > I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> > settings, I've tried the VIA chipset drivers, but nothing stops these
> > corruption issues. PCI activity jams over each other, giving graphical
> > corruption and lockups.
> >
> > Can anyone give me any more tips on what to do before I have to junk
> > this motherboard?
> >
> > Thanks for any help
> >
>
> Check supply voltages
> Check Ram & Ram Voltages
> Check CPU Voltages
> Check Heat of system (clean the heatsinks)
>
> Shrug
>


FYI, Just saying it's not allways a chipset issue..
June 9, 2004 11:44:48 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

> Could it be an irq conflict issue? Try putting your PCI cards into
> different slots and see. Also make sure you're using the latest drivers for
> all your PCI cards.

I've tried that.

I've also updated the BIos to the latest version.
June 10, 2004 10:21:03 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Paul wrote:

> In article <40C609C7.4732866F@s.pam>, Broken <nospam@s.pam> wrote:
>
> > Actually I've got a KM133A chipset motherboard, but the KM133A is
> > basically the KT133A with onboard video.
> >
> > I've tried the 3rd party PCI Latency patch, I've tried changing Bios PCI
> > settings, I've tried the VIA chipset drivers, but nothing stops these
> > corruption issues. PCI activity jams over each other, giving graphical
> > corruption and lockups.
> >
> > Can anyone give me any more tips on what to do before I have to junk
> > this motherboard?
> >
> > Thanks for any help
>
> The nearest Asus board would be a7v133-vm (KM133A chipset,
> VT8365A Northbridge, evil 686B Southbridge).

Yes, that's the evil one.

> I thought the
> Via 4in1 chipset drivers solved the problems, as much as
> they can be solved.

They either do nothing, or corrupt Windows and force a reinstall.

> Some people still have problems, so
> there are a certain percentage of boards that still have
> problems. I thought one problem was disk corruption.

Yes, though I haven't had any disk corruption issues.

> I don't remember reading about any graphics corruption.

I've come across it on the Linux kernel mailing list archives.

> You should uninstall/stop using any third party PCI
> Latency patch. Try to use the Via 4in1 driver, and
> let the Via supplied values drive the chips for a
> while. Including both solutions means not knowning
> just what settings are being used.

Maybe I'll try again.

> One post in Google mentions:
>
> "You have to set the following parameters to ensure a save
> operation of the VIA Southbridges (in particular the 686B):
>
> PCI Delay Transaction = 0 (off)
> PCI Master Read Caching = 0 (off)

Setting to safer values lessens the problem, but it does not remove it.

> PCI Latency = 0 (Values from 0 till 32 seems to be save,
> all over 32 are not!)"
>
> Of course, these settings just destroy performance. A PCI Latency
> of 16 is about as low as I would want to go, as any lower than
> that, video updates to the screen will start to stutter. A sound
> card would have a hard time producing clean sound, when Delay
> Transaction if Off (but you'll have to leave it that way, to
> avoid disk corruption).
>
> Your statement about similarity of Northbridges doesn't necessarily
> apply, as a chip with built-in graphics is quite different from
> one without graphics. The silicon die would be much bigger, and
> build-in video functions make the Northbridge run hotter. You would
> want to check that the fan is functioning, if there is one, and
> that the Northbridge is warm to the touch, as that means heat
> is being transferred successfully from the chip to the heatsink.
> If the heatsink is cold to the touch, it either means the chip has
> no appreciable heat output, or there is an air gap between the chip
> and the heatsink.

There're no fans or heatsinks on the board.

> Have you tried modifying any clocks on the board ? Maybe the
> symptoms change if the FSB is reduced.

Lowering to 90MHz FSB lessens the problems a bit, but doesn't take them away.
Anonymous
a b V Motherboard
June 10, 2004 10:21:04 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

>
> There're no fans or heatsinks on the board.
>


I THINK you found your problem..
That NB chip NEEDS a heatsink
June 10, 2004 1:17:02 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

rstlne wrote:

> >
> > There're no fans or heatsinks on the board.
> >
>
> I THINK you found your problem..
> That NB chip NEEDS a heatsink

sorry, it does appear to have a small heatsink. Sorry
!