Re: [Dri-users] Voodoo3 2000 lockup / overheating?

[Robert <es...@wo...>]

On Friday 17 August 2001 07:55 am, Simon Harvey wrote:
> I can't seem to run a heavily loaded OpenGL app for more than 5 minutes
> before the odd triangle gets dropped, a couple of bits get randomly
> corrupted in textures and a few moments later the system locks up
> hard. The application is just zooming in on a sequence of textures, but
> its running flat out at 84fps all the time, which seems rather high eve=
n
> though its a simple geometry (CPU@366MHz).
>
> The GPU has no fan on the V3-2000PCI and this seems just like an
> overheating problem, especially as very occasionally the colours get al=
l
> inverted.
>
> What determines the clock rate here? Is it the DRM module or just
> tdfx.o? Are the clock speeds being set for the V3 3000? Is there any wa=
y
> to lower it to see if this is the problem?
>
> System: kernel 2.4.8, XF86 4.1.0, Glide3 from dri.sourceforge.net, 96MB
> RAM, 16MB Voodoo3 2000PCI, Celeron 366, Intel 440__ chipset.
>
> Thanks,
>
> Simon Harvey
> Whittle Lab., Cambridge, UK

The bus rate on the Voodoo 3 series is fixed by crystal.  You can't chang=
e it.

However, you could try to cool off the chip by hooking on a fan.  Just us=
e a=20
clamp or wide screws to hack a mount of a 3" fan onto the heatsink.  I di=
d it=20
on my Voodoo3 3500.  However I'm not sure if overheating is your problem =
so=20
read further.


Your more likely to have interferance problems in the AGP bus interferanc=
e=20
causing video memory coruption (which also can cause a crash.)  Clean you=
r=20
connectors with a lint free cloth dampened with a solution of 5-10% isopr=
opyl=20
alchohol and the rest DISTILLED water.  It is very important to use Disti=
led=20
water, as it leaves no residue.  Dry the connectors with a dry portion of=
 the=20
lint free cloth, making sure to leave no moisture on the connectors, whic=
h=20
may lead to oxidation.  Re-insert the card.

If your system has it's bus speed overclocked, disactivate that overclock=
ing.=20
The overclocking will carry over to the AGP bus base speed on some system=
s.=20
You can re-activate it if it isn't the problem, but get it working first.

Enable "AGP Spread Spectrum" in the BIOS which is an electronic noise con=
trol=20
system for the AGP bus.

Check if it works now, otherwise go on the the more drastic measure of us=
ing=20
1X agp instead of 2X.  Finally, hook fans everywhere in your computer in =
a=20
design that enables air flow because overheating components creat more=20
electrical noise.  You can find out how to create air-flow designs on any=
=20
decent overclocker's web site (they're not just good for overclocking).=20