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.


https://www.amazon.com/dp/B07SMX1DB7?psc=1&ref=ppx_yo2ov_dt_b_product_details

 

[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.

 

[YMK]

Nice. If the card sits vertically, you'll get better convection by rotating the heatsink 90 degrees.

 

[jasa1063]

Nice. If the card sits vertically, you'll get better convection by rotating the heatsink 90 degrees.

I rotated the heatsink as you suggested.

Thanks!