Electronics > Projects, Designs, and Technical Stuff
Disapating 750W of MOSFET heat for under $100
thm_w:
--- Quote from: EmmanuelFaure on April 11, 2019, 08:09:00 pm ---The Rth of a common CPU cooler, costing about $20, is about 0.5°C/W. Let's say you want a max delta T = 50K (Between junction and air), this leads to 100W dissipated for $20, 750W for $150. That doesn't take into account all the custom hardware to mount your FETs, the assembly work, etc.
For this range of dissipated power, there's no any heatsink cheaper per watt dissipated than CPU coolers, they're manufactured by millions. Any solution with industrial parts will cost more than that.
--- End quote ---
Evo212 slightly better at 0.17°C/W for $30: https://www.anandtech.com/show/10500/stock-cooler-roundup-intel-amd-vs-evo-212/6
Wonder how a corsair H60 or similar compares, probably better with a high power fan, but I can't seem to find any specs.
Mr.B:
The Corsair H60 is what I used in my design - see previous post.
I could not find any specs on it, so contacted Corsair directly.
Their response was that it was confidential information.
What I interpreted was "We have no idea"...
Mechatrommer:
for $40-60 you can already get water based cooling, much powerful heat transfer and movable heat dissipation element. for this kind of power and if compactness/configurable is preferred, thats a wiser solution imho, ymmv.
--- Quote from: Mr.B on April 12, 2019, 01:24:28 am ---The Corsair H60 is what I used in my design - see previous post.
I could not find any specs on it, so contacted Corsair directly.
Their response was that it was confidential information.
What I interpreted was "We have no idea"...
--- End quote ---
i have $40+ segotep halo blue china brand (cant find in ebay anymore) with 12x12cm coil/fan put on 95W cpu, no need big fan on cooling coil, everything runs cool to the touch with only slight air flow. i believe it can take 200-400W easily with more powerful fan. because it so affordable, i bought a spare. for something like this project. but for configuration in OP i think he will need more than one either way.
Nerull:
A Corsair H115 can barely keep up with a 210W 9900k.
37electrons:
Paralleling MOSFETs in linear mode is not a good idea. You'd need a separate gate control signal for each of them if you want true & equal load sharing.
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