this post was submitted on 03 Mar 2026
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Looks nice. Why they don't sell PCs with cooling like that? What are the downsides?
I would guess that the low surface area would lead to problems. At first it would cool very well because of the huge thermal mass, but once it reaches thermal equilibrium the cooling would be quite weak.
how long till it reaches thermal equilibrium? maybe it can endure a full load for an hour
Your mom can endure a full… oh never mind.
You're looking at about a half hour per kilogram of copper to raise it by 50 °C with 100W of heat.
Actual delta from ambient to thermal limit will typically be a little higher than that, but so is processor wattage on mid-to-high performance CPUs, so I'm happy enough with that as a ballpark estimate.
Someone else estimated that block as 4.5kg, so you've got something close to two and a half hours of cooling from an ambient start.
I was wondering about this too, but I'm not an engineer so I would have to look up how to calculate this