Passive cooling solution for the Macintosh Display Card 8*24 GC

[jasa1063]

I recently picked up a Macintosh Display Card 8*24 GC NuBus video card. The one thing I immediately noticed is how hot the Am29000 CPU got. I was looking for an inexpensive passive cooling solution and this is what I came up with. I found this 4 pack of aluminum coolers for $10.99 on Amazon. I attached one of the coolers to the Am29000 using Sekisui #5760 double sided thermal tape. This has made a noticeable difference in how hot the Am29000 now gets. Attached is a photo of how this looks on the Macintosh Display Card 8*24 GC and a link to the coolers on Amazon.

Amazon.com

 

[Hopfenholz]

Nice work!

 

[jasa1063]

I just found out how well this removes heat from the Am29000. It was transferring all that heat to my Daystar PowerCache 50MHz Accelerator causing that to overheat. I had the Macintosh Display Card 8*24 GC in the NuBus slot closest to the IIci PDS slot. I moved it over to the middle NuBus slot and that seems to have solved the issue. Everything is running stable at this point.

 

[Byrd]

A nice slow 80 - 90mm fan stuffed somewhere (velcro on base can do) in a jam packed vintage Mac case is always recommended - just to blow that small amount of air through and past the heatsinks, with the PSU doing the exhaust work.

 

[jasa1063]

By moving the card to the middle NuBus slot and rotating the heatsink 90 degrees, the overheating problem is now gone.