Radiator testing S19 J pro with no fan cooling

Ive been playing around with Luxos temperature system with the board target set for 55 degrees Celsius. The miner has water cooling plates and I want to see if its possible to cool the miner with ambient temperatures.

The miner will underclock/overclock itself based on board temps. It will aim for 55 degrees, if it reaches 60 degrees it will underclock itself. If the board reaches 70 it will shut off. I set the max profile to 545mhz which is the stock 104T and the min profile to 145mhz which im going to guess will be roughly 20-30T.

Important things to note - the weather is currently 10 degrees Celsius and when I started this test the board temps was 14 degrees.

Im just going to update this thread as it progresses and see where its at in 24 hours time.

Update 1: While the miner did roll itself back when it got too hot, it was not enough. One board shut off for being too hot and the other 2 boards were at various frequencies (I think 395mhz and 420mhz) and board temps were at 69. So I shut them off, cooled the water down and going for round 2. I think I set the hot board temp too high at 65, I will lower that.

Round 2 settings are target temp 40 degrees, max frequency is 420mhz. Lets see if it can hold its own.
Reached 420mhz, board temps were between 44-47 before it started to roll back. The temps stayed the same while rolling back, and each board went down 1 degree when it reached the 195mhz profile, which is 36T

It dropped another degree when it reached the 170mhz which is 33T.

Its dropped back to 40 degrees at 27T which is the lowest profile

Going to set it to reach the max profile of 65T, but will also make that a custom undervolted profile.
So max temp before undervolting is 60c, and max profile is 345mhz/11.88v

Ran for 5 hours and stabilized itself at 270mhz which I think is 52.5T, and board temps was high 50s

Unsurprisingly the water drum was real hot to touch, at least 40 degrees as a guess, id say more like 45-50. Obviously this has performed better in winter than what it would in summer, but interesting, and would be interesting to see in a pool/spa scenario in a much larger sum of water which would allow for more cooling opportunities with the transfer of water etc

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