(This is a guest post by Antoni Sawicki aka Tenox)
DEC Multias are known for notoriously overheating. Someone even coined a term “Multia Heat Death”. The typical folklore recommendation of the time was to only run it vertically, replace the built-in fan with a more powerful, etc.
In modern times one can inexpensively acquire a thermal camera that attaches to a mobile phone. So why not take a peak inside the inferno.
This is how Multia looks like in a thermal camera. PS is on top. CPU on the left. FDD/HDD bottom left.
The CPU, Alpha AXP, runs at around 60C, not great, not terrible.
Scanning up close through individual chips I found this curiosity:
Wedged between the memory chips and the power supply is a little chip that generates almost 100C. That’s a boiling temperature of water. Note the thermal image is shifted in regards to the visual part due to close range.
What does this chip do? I have no clue. Perhaps someone can help here. What I however did to it is this:
Slapped on this really nice radiator. In fact I added little radiators you can buy for Raspberry PI to all the chips generating tons of heat.
This is how the motherboard looks like right now:
I also added a tiny fan on top of the CPU. Drilled some holes in the case and of course replaced the main fan with a highest air flow I could find.
Time will tell if this resolves the heat death, but my Multia now runs much cooler with help of all the radiators and extra fans.