You can dry ice cool your GPU and Northbridge as well. I went on a dry ice
fetish and decided to cool the CPU, Northbridge and GPU of my P4 Rig. Here,
you can see the CPU container on the left, the Northbridge container in the
middle, and the GPU container on the right.

19 Dry ice cooling Guide and Adventure

20 Dry ice cooling Guide and Adventure

The GPU container is made of aluminum as I could not find any square copper
pipes. It is welded together to form an “L” so that it will clear
the ram sinks on my video card.

23 Dry ice cooling Guide and Adventure

I insulated it with foam.

24 Dry ice cooling Guide and Adventure

You can see that there is a small hole near the bottom to form the “L”
shape.

26 Dry ice cooling Guide and Adventure

On my video card:

37 Dry ice cooling Guide and Adventure

38 Dry ice cooling Guide and Adventure

I had to make an acrylic plate to go over my CPU container so that it will
mount onto a socket 478 CPU.

21 Dry ice cooling Guide and Adventure

22 Dry ice cooling Guide and Adventure

A dry test run of the set up:

 Dry ice cooling Guide and Adventure

The Northbridge and CPU container ready for action:

28 Dry ice cooling Guide and Adventure

And then the GPU container goes on:

29 Dry ice cooling Guide and Adventure