vid card freaking when too cold

Rotax · 04-12-2001, 01:34 AM

my prophet2Gts64 is freaking on the desktop,i see white flashing lines, starting at below 9°C.
below 0 it gets worse.
do you have an idea of what causes that?

kozoman · 04-12-2001, 03:37 PM

MY GEFORCE CARD. BELOW. ZERO C. GIVES ME A HEAD ACHE. WHEN I USE ICE IN THE WATER.......
THINKING I NEED SOME MORE INSULATION ON THE BLOC SIDE OF THE CARD.

U HAVE MOISTURE. CONDENSTAION. ON THE BLOC SIDE. EFFECTING IT.?

Rotax · 04-12-2001, 05:41 PM

i dont think so...its well insulated, but possible.ill take a look at it.

hielko · 04-13-2001, 03:19 AM

I would say you have a condensation problem. Weird instabilty problems when supercooling are usally caused by this...

Rotax · 04-13-2001, 08:40 AM

maybe but its so hermetically sealed in high density foam...no air can get in..ill chk that.

Jtw0128 · 04-14-2001, 06:39 PM

I have the same problem, ran my radeon below 0 for about a week and started to get some small weird spots and lines until my card died a couple days ago, took the thing apart and let it sit overnight and it works fine now....strange.

mkosem · 05-14-2001, 01:30 PM

what kind of core clock did you get with the peltier cooled radeon?

--Matt

imagex · 05-15-2001, 06:35 PM

my voodoo 3 fliped out at 11F ,but that was with the help of dryice,got down to 7F,damn trying for -0

Rotax · 05-15-2001, 09:54 PM

now its all under control.

Darkhorse · 07-06-2001, 07:38 AM

What did you do to fix it?

Rotax · 07-06-2001, 04:24 PM

i insulated with clear cutex, i kinda painted around the gpu until the gap was closed.
so now the air cant get under the gpu where the pins go through the pc board of the vid card.
it took a lot of layers.
silicone should do the trick in less layers.
now it goes to about -20° celcius without any artifacts and anomalies.

DSREC · 07-07-2001, 02:23 PM

don't you think its funny that the major CPU companies still speak badly of supercooling? I was just reading something on the AMD website about Peltiers in the FAQ and they had a negative response. They said "blah blah blah pin sweating problem blah". Surprising considering how much evidence there is (thousands of people) who are having alot of success with it. Well I guess VapoChill and KyroTech is a start..

Darkhorse · 07-07-2001, 03:22 PM

Looking at it from AMD's point of view - If they don't say it's a bad thing they'll have hundreds of half-wits trying to take them to court, because you didn't tell them it could kill their chip.

On top of that AMD are probably looking at a chip having 5+ years of life. How many overclockers are going to have their chip in 12 months?

Rotax

So what sort of OC are you getting out of the card now?

Rotax · 07-08-2001, 12:05 AM

the highest i oc'ed it is 300/500...its an Elsa Gladiac Ultra.
im sure it could go higher.
but these days im more into racing my car than the 'puter...

Spinoza · 07-08-2001, 12:29 PM

Simple (Well maybe not so simple) Physics comes into play when you cool semi-conductors to low temperatures. Unlike conductors, when semi-conductors are cooled their resistance increases. When you get an average electron energy below the activation level you start "missing" pulses. Because video cards don't produce as much internal heat as CPUS, this problem can become noticable even at temperatures around 0C. If you are getting problems with a code chip you can't explain any other way. This is probably the reason.

04-12-2001, 01:34 AM	#1
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	vid card freaking when too cold my prophet2Gts64 is freaking on the desktop,i see white flashing lines, starting at below 9°C. below 0 it gets worse. do you have an idea of what causes that?

05-14-2001, 01:30 PM	#7
mkosem Cooling Savant Join Date: May 2001 Location: here Posts: 494	what kind of core clock did you get with the peltier cooled radeon? --Matt __________________ If you can't cool it, blow it up!! http://www.mattkosem.com

05-15-2001, 06:35 PM	#8
imagex Cooling Savant Join Date: Mar 2001 Location: south FL Posts: 220	my voodoo 3 fliped out at 11F ,but that was with the help of dryice,got down to 7F,damn trying for -0 __________________ Overkill'n Overclock'n Hybrid Mobile Solutions

07-07-2001, 02:23 PM	#12
DSREC Cooling Neophyte Join Date: Jul 2001 Location: Long Island, NY Posts: 18	don't you think its funny that the major CPU companies still speak badly of supercooling? I was just reading something on the AMD website about Peltiers in the FAQ and they had a negative response. They said "blah blah blah pin sweating problem blah". Surprising considering how much evidence there is (thousands of people) who are having alot of success with it. Well I guess VapoChill and KyroTech is a start.. __________________ AMD T-Bird 1.1Ghz @ 1385 ABit KT7A-Raid Mobo 768Mb Mushkin REV3+/CL2 SDRAM DangerDen Maze2/BlackIce/Eheim 1250 3 x 40Gig Maxtor IDE HD's Hercules 3D Prophet III [GeForce3]

07-08-2001, 12:29 PM	#15
Spinoza Cooling Neophyte Join Date: Jun 2001 Location: Upstate NY Posts: 42	Simple (Well maybe not so simple) Physics comes into play when you cool semi-conductors to low temperatures. Unlike conductors, when semi-conductors are cooled their resistance increases. When you get an average electron energy below the activation level you start "missing" pulses. Because video cards don't produce as much internal heat as CPUS, this problem can become noticable even at temperatures around 0C. If you are getting problems with a code chip you can't explain any other way. This is probably the reason. __________________ Thunder K7 Athlon 1800's Danger Den/Ehiem to cool jig of RAM http://www.cs.oswego.edu/~vito/complete.jpg

04-12-2001, 03:37 PM	#2
kozoman Cooling Neophyte Join Date: Mar 2001 Location: detroit Posts: 11	MY GEFORCE CARD. BELOW. ZERO C. GIVES ME A HEAD ACHE. WHEN I USE ICE IN THE WATER....... THINKING I NEED SOME MORE INSULATION ON THE BLOC SIDE OF THE CARD. U HAVE MOISTURE. CONDENSTAION. ON THE BLOC SIDE. EFFECTING IT.?

04-12-2001, 05:41 PM	#3
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	i dont think so...its well insulated, but possible.ill take a look at it.

04-13-2001, 03:19 AM	#4
hielko Cooling Savant Join Date: Feb 2001 Location: The Netherlands Posts: 108	I would say you have a condensation problem. Weird instabilty problems when supercooling are usally caused by this...

04-13-2001, 08:40 AM	#5
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	maybe but its so hermetically sealed in high density foam...no air can get in..ill chk that.

04-14-2001, 06:39 PM	#6
Jtw0128 Cooling Neophyte Join Date: Feb 2001 Location: Scotch Plains Posts: 15	I have the same problem, ran my radeon below 0 for about a week and started to get some small weird spots and lines until my card died a couple days ago, took the thing apart and let it sit overnight and it works fine now....strange.

05-15-2001, 09:54 PM	#9
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	now its all under control.

07-06-2001, 07:38 AM	#10
Darkhorse Cooling Savant Join Date: Jun 2001 Location: UK Posts: 103	What did you do to fix it?

07-06-2001, 04:24 PM	#11
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	i insulated with clear cutex, i kinda painted around the gpu until the gap was closed. so now the air cant get under the gpu where the pins go through the pc board of the vid card. it took a lot of layers. silicone should do the trick in less layers. now it goes to about -20° celcius without any artifacts and anomalies.

07-07-2001, 03:22 PM	#13
Darkhorse Cooling Savant Join Date: Jun 2001 Location: UK Posts: 103	Looking at it from AMD's point of view - If they don't say it's a bad thing they'll have hundreds of half-wits trying to take them to court, because you didn't tell them it could kill their chip. On top of that AMD are probably looking at a chip having 5+ years of life. How many overclockers are going to have their chip in 12 months? Rotax So what sort of OC are you getting out of the card now?

07-08-2001, 12:05 AM	#14
Rotax Cooling Neophyte Join Date: Apr 2001 Location: Montréal, Québec Posts: 21	the highest i oc'ed it is 300/500...its an Elsa Gladiac Ultra. im sure it could go higher. but these days im more into racing my car than the 'puter...

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