Does the video card slow down if it gets too hot?

[ANTant]

Does the video card slow down if it gets too hot? I know CPUs can do
this like Pentium 4/IV?

Thank you in advance.
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[Ben Pope]

Does the video card slow down if it gets too hot? I know CPUs can do
this like Pentium 4/IV?

It can do.

Well, if you have an XT it might not overclock as much.

Ben

 

[ANTant]

It can do.

Well, if you have an XT it might not overclock as much.

Ooops, I forgot to mention that this was an ATI Radeon 9800 Pro AIW
(128 MB) video card.

--
"As a thinker and planner, the ant is the equal of any savage race of men; as a self-educated
specialist in several arts she is the superior of any savage race of men; and in one or two high
mental qualities she is above the reach of any man..." --Mark Twain
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[Ben Pope]

Ooops, I forgot to mention that this was an ATI Radeon 9800 Pro AIW
(128 MB) video card.

Then the chances are that it doesn;t have a temperature sensor and couldn't
automtaically hrottle the clock speed based on temperature. Having said
that, I'm lead to believe that some of the newer cards are actually XT
cores.

Anyway, regardless of that, I don;t think your card would changer it's
speed.

Ben

 

[Mudfish\(Co30\)]

The video card MAY slow down if the VPU begins
to overheat under stress. What you will see is a
decrease in frame rates, usually but not always before
a video trapout. If the VPU is on the very borderline of
overtemping at max load it may swing back and forth between
full and unusable frame rates dependant on rendering load.

I have seen this on numerous undercooled and overclocked
Radion cards including my own (antiquated but presently well
cooled and seriously overclocked 9700 Pro).

As someone else mentioned some newer cards have fan throttling
to deduce fan noise when under limited load, but I do not beleive
the card interactively varies the VPU/Memory clock speed
according to the rendering load (could be wrong - technology
marches.on).

<{{ MudFish (Co30){('>

www.Co30.com
"Careful with that Axe Eugene."

 

[Ben Pope]

As someone else mentioned some newer cards have fan throttling
to deduce fan noise when under limited load, but I do not beleive
the card interactively varies the VPU/Memory clock speed
according to the rendering load (could be wrong - technology
marches.on).

The drivers for ATI XT range dynamically overclock the card.

http://www.ati.com/products/catalyst/overdrive.html

Ben

 

[ANTant]

Ooops, I forgot to mention that this was an ATI Radeon 9800 Pro AIW

Then the chances are that it doesn;t have a temperature sensor and couldn't
automtaically hrottle the clock speed based on temperature. Having said
that, I'm lead to believe that some of the newer cards are actually XT
cores.

Ben, how can I check if I have the newer cards with XT cores? I got mine
on 9/16/2003 according to my computer history
(http://alpha.zimage.com/~ant/antfarm/about/toys.html).
--
"As a thinker and planner, the ant is the equal of any savage race of men; as a self-educated
specialist in several arts she is the superior of any savage race of men; and in one or two high
mental qualities she is above the reach of any man..." --Mark Twain
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/ /\ /\ \ Ant @ The Ant Farm: http://antfarm.ma.cx
| |o o| | Ant's Quality Foraged Links: http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )

 

[ANTant]

The video card MAY slow down if the VPU begins
to overheat under stress. What you will see is a
decrease in frame rates, usually but not always before
a video trapout. If the VPU is on the very borderline of
overtemping at max load it may swing back and forth between
full and unusable frame rates dependant on rendering load.

I have seen this on numerous undercooled and overclocked
Radion cards including my own (antiquated but presently well
cooled and seriously overclocked 9700 Pro).

How did you keep this under control without going up and down on your
Radeon 9700 Pro. I really want this to stop. I don't want overclockign
and underclocking. Just stay where it is!

Do I assume core (378.00) and memory (337.50) are the correct default BIOS
clock rates?

--
"As a thinker and planner, the ant is the equal of any savage race of men; as a self-educated
specialist in several arts she is the superior of any savage race of men; and in one or two high
mental qualities she is above the reach of any man..." --Mark Twain
/\___/\
/ /\ /\ \ Ant @ The Ant Farm: http://antfarm.ma.cx
| |o o| | Ant's Quality Foraged Links: http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )

 

[OneActor1]

My X800 XT Platinum Edition came with special ATI software that
monitors card temperature. If it senses the card is running cool
enough, it can and will actually turn up the clock speed. I assume it
works in the opposite direction as well. Maybe your card has something
similar built in that is slowing down the card. If it's regularly
getting overheated, you probably need an extra case fan, or just a case
with better air flow.

 

[Ben Pope]

Ben, how can I check if I have the newer cards with XT cores? I got
mine on 9/16/2003 according to my computer history

Dunno, perhaps there are utilities that display the core type. The 9800
Core is the R350, the XT is the R360.

Of course, if you can find a utility that can tell you the temperature, and
it seems correct, that might also be an indication of an R360 core.

Ben

 

[Ben Pope]

My X800 XT Platinum Edition came with special ATI software that
monitors card temperature. If it senses the card is running cool
enough, it can and will actually turn up the clock speed. I assume it
works in the opposite direction as well.

I don't think it underclocks.

Ben

 

[Ben Pope]

Dunno, perhaps there are utilities that display the core type. The
9800 Core is the R350, the XT is the R360.

Of course, if you can find a utility that can tell you the
temperature, and it seems correct, that might also be an indication
of an R360 core.

Oh, I very much doubt that your driver is changing the speed.

Ben

 

[First of One]

No. Plain and simple.

BTW, to read the temp sensor, you need both an R360 core and a 9800XT-style
PCB. The telltale sign is a low-profile VGA connector.

 

[Mudfish\(Co30\)]

I took off the standard heatsink and spacer and
installed a high performance heatsink on the VPU
and significantly improved my case airflow strategy.
..
Obviously if your clock is being controlled dynamically
by the warez according to rendering load improved cooling
won't help you.

<{{ MudFish (Co30){('>

www.Co30.com
"Careful with that Axe Eugene."