5 ms·
For what it's worth, I resolved my Pi4 overheating issue by expanding the surface area of the heat sink with some folded aluminium foil [1]. Not the prettiest
by tbabej 6y ago
For what it's worth, I resolved my Pi4 overheating issue by expanding the surface area of the heat sink with some folded aluminium foil [1].
Not the prettiest solution, but works just fine. The Pi4s on the picture are running at ~100% CPU utilization of all cores for months (using mlucas) now without any overheating events.
[1] https://postimg.cc/CzNzMb6B https://postimg.cc/CzNzMb6B
- jancsika 6y agoOoh, that's very clever! I'm definitely going to give this a shot...
- Scoundreller 6y agoDid you glue the aluminum slices to the existing ‘sinks or?
- tbabej 6y agoNo, its malleable aluminium foil (I took it from the kitchen), that holds between the teeth of the original sinks merely by pressure of being jammed in.
- Scoundreller 6y agoGotcha. Reminds me of an old story of someone using coins to bridge the gap between a CPU heat sink and the L2 cache chips with good effect.
- LeoPanthera 6y agoHow do you attach it to the chip?
- tbabej 6y agoI have glued on top the classic cheap heat sink [1], which came with the Pi. Once that was determined to be unsuficient, I slotted the aluminium foil (folded to achieve sufficient thickness to stay in place) between the teeth. [1] https://www.buyapi.ca/product/aluminum-heatsink-for-raspberry-pi-4b-3-pack/ https://www.buyapi.ca/product/aluminum-heatsink-for-raspberr...
- Scoundreller 6y agoI wonder how well several hex-head bolts superglued to the chip would work... (Or some kinda metallic epoxy, even JB Weld is part iron oxide, but a thin layer of superglue may be sufficiently effective)
- CydeWeys 6y agoSmall aluminum heatsinks are quite cheap. You'll spend more on shipping than on the heatsinks themselves at this volume. I'd sooner do that, unless you really need to pinch every dollar for some reason.
- Scoundreller 6y agoI’ve got a bucket of old bolts, but not heat sinks :(
- undersuit 6y agoI swear I saw some guy just stack pennies on the chip and the extra thermal mass did wonders. JB-welding it would only increase the heat transfer compared to air between the coin faces. Or you can specialize and get some thermal epoxy made for permanent effective heat transfer: https://www.amazon.com/Arctic-Silver-Premium-Adhesive-ASTA-7G/dp/B0087X7262/r https://www.amazon.com/Arctic-Silver-Premium-Adhesive-ASTA-7...
- Scoundreller 6y agoLooks like US pennies will do a pretty good job (copper plated zinc). With JB Weld you could probably build a set of fins. Most post-2000 Canadian coins are coated steel, meh.