Finding a replacement cooler for the CyberStormPPC card can be difficult because most PC north/south-bridge replacement heatsinks typically expects four holes evenly apart in the edges of a 4 cm square. You can be creative and drill and tap a heatsink so it fits the CyberStormPPC card or mount a small Zalman heatsink which have very flexible hardware for mounting the heatsink.

IMHO the stock heatsink is actually fine, it is very thin but should do its job perfect when mated to a proper fan instead of the half centimetre tall 40 mm fan that comes as stock.

Look for any quality 40x40x10 mm fan running on 12 volt. The stock Sunon fan runs on 5 volt which means the fan is quiet but not as efficient at cooling the hot PPC chip as a faster and bigger 40 mm fan would be.

When purchasing a replacement fan also get a Molex to fan power cable adapter since the CyberStormPPC card only has 5 volt on the card and most modern 40 mm fans run on 12 volt.

Quite a lot has happened in the worlds of fans since the CyberStormPPC came out so do not expect a huge increase in noise level even though you are running a bigger fan at faster speed.

Improving CyberStormPPC cooling

Replacing the fan on the turbo card should be enough to warrant many years of enjoyment out of the brutal PPC card but you should also find some way of improving airflow over the whole card. In a typical Amiga 4000 desktop air comes into the case around the rear Zorro slot brackets where there are ventilation holes, air is then drawn around the Zorro cards over the turbo board and into the PSU which then pump hot air out of the case with the 80 mm fan.

In my latest A4000 setup I am running a minimal hardware configuration to open up the case a bit more. Gone are the 3.5” harddrive, CD-rom and unnecessary Zorro cards that only heat up the Amiga and hinder airflow. While air is still hot at the back of the system the system runs cooler.

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