Geforce 7800 locks up

2011-09-17 Thread Kris Tilford 

On Sep 17, 2011, at 3:18 PM, Charles wrote:


I just bought a second hand 7800 and installed in my G4 Dual 800.

Works fine to begin with but eventually the system "locks up".

Had to power off and on the reboot - got a lot of skewed random  
pixels on the screen.


I leave it sit for quite some time - boot it back up and everything  
is great for a while but later locked up again.


I put my old (stock) card back in and it runs and runs.

Is it possible that these systems don't have adequate ventilation  
for this hotter card?  I did have the aux power connection connected.


I don't want to disable one of my CPUs to use this card, kind of  
defeats the purpose.


Any suggestions?


Look at this:



Pay attention to the taping of pins 3 & 11.

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Re: Abridged summary of g3-5-list@googlegroups.com - 1 Message in 1 Topic

2011-09-17 Thread Bruce Johnson 

On Sep 17, 2011, at 1:18 PM, Charles wrote:

> I just bought a second hand 7800 and installed in my G4 Dual 800.
> 
> Works fine to begin with but eventually the system "locks up".
> 
> Had to power off and on the reboot - got a lot of skewed random pixels on the 
> screen.
> 
> I leave it sit for quite some time - boot it back up and everything is great 
> for a while but later locked up again.
> 
> I put my old (stock) card back in and it runs and runs.
> 
> Is it possible that these systems don't have adequate ventilation for this 
> hotter card?  I did have the aux power connection connected.

I think you just discovered why it was available on the second-hand 
marketbut make sure your video drivers are up-to-date. ISTR some issues 
with the GeForce line.

-- 
Bruce Johnson

"Wherever you go, there you are" B. Banzai,  PhD

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Geforce 7800 locks up

2011-09-17 Thread Valter Prahlad 
Il giorno 17-09-2011 22:18, Charles ha scritto:

> I just bought a second hand 7800 and installed in my G4 Dual 800.
I think you mean Geforce 7800 graphic card.
Was it for Mac or PC? Was it for G5 only, or G4 also?

I think there's some hack to do for adapting these cards into G4s.
Did you read some webpages about this on the Net?

> Is it possible that these systems don't have adequate ventilation for this
> hotter card?  
It's possible. A lockup after a while, sounds like heating issues, or maybe
power.

> I did have the aux power connection connected.
Did you check the power requirements of the card against the G4 power
supply?
Recent video cards are quite power hungry.


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Re: Abridged summary of g3-5-list@googlegroups.com - 1 Message in 1 Topic

2011-09-17 Thread Charles 
I just bought a second hand 7800 and installed in my G4 Dual 800.

Works fine to begin with but eventually the system "locks up".

Had to power off and on the reboot - got a lot of skewed random pixels on the 
screen.

I leave it sit for quite some time - boot it back up and everything is great 
for a while but later locked up again.

I put my old (stock) card back in and it runs and runs.

Is it possible that these systems don't have adequate ventilation for this 
hotter card?  I did have the aux power connection connected.

I don't want to disable one of my CPUs to use this card, kind of defeats the 
purpose.

Any suggestions?  

Thanks,

Charles

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You received this message because you are a member of G-Group, a group for 
those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette 
guide is at http://www.lowendmac.com/lists/netiquette.shtml
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