disabling pins 3 and 11 on Nvidia 7800GS

[herminio]

I would love some advice. I got an Nvidia 7800GS for my PowerMac G4 MDD. I was able to flash the correct ROM and put tape on pins 3 and 11. I installed it on my PM and booted. It took a while to boot but Sorbet Leopard loaded. I went to the profiler and it saw the GPU. However Geekbench was giving me a score of 900?!? Then when I loaded a YouTube video on Leopard WebKit the screen crashed. I rebooted and it froze with a blank blue screen. I am suspecting that the pins were not properly disabled. I tried to watch YouTube videos on how to properly do this but I could not really get a good look at how it was done. Any advice would be appreciated.

Regards,
Herminio

 

[eyoungren]

I would love some advice. I got an Nvidia 7800GS for my PowerMac G4 MDD. I was able to flash the correct ROM and put tape on pins 3 and 11. I installed it on my PM and booted. It took a while to boot but Sorbet Leopard loaded. I went to the profiler and it saw the GPU. However Geekbench was giving me a score of 900?!? Then when I loaded a YouTube video on Leopard WebKit the screen crashed. I rebooted and it froze with a blank blue screen. I am suspecting that the pins were not properly disabled. I tried to watch YouTube videos on how to properly do this but I could not really get a good look at how it was done. Any advice would be appreciated.

Regards,
Herminio

With taping, you need scotch tape and an X-Acto knife. Beware that if you take the card out frequently you can end up leaving tape inside the AGP slot. You don't want to do that.

The Mac Elite: Pins 3 And 11

web.archive.org

 

[herminio]

With taping, you need scotch tape and an X-Acto knife. Beware that if you take the card out frequently you can end up leaving tape inside the AGP slot. You don't want to do that.

The Mac Elite: Pins 3 And 11

web.archive.org

Thanks the pictures helped. The system boots and I can see the GPU in the System profile. However I am seeing some issues.

1. Geekbench is still reporting scores less than 1000
2. Booting into Sorbet Leopard takes 3 min, but Tiger boots near instantly

Something is prevent the GPU from the using its full potential. I think maybe it is power? I am using the stock power supply so it is 20 yrs old. Any thoughts?

 

[LightBulbFun]

Geekbench is a CPU benchmark and has nothing to do with your GPU


Leopard takes 3 minutes to boot because you probably did not flash the ROM with the thermal sensor disabled


if Pins 3 and 11 where not taped properly than the machine would have never even booted properly in the first place

 

[weckart]

A semi-permanent solution if you are absolutely sure not to use that card in any other machine or sell it on later is to cut the traces above pins 3 and 11. You could actually bridge the cuts later if you are handy with a fine tipped soldering iron or possibly even a trace pen.