Hi,
This might interest some of you.
I am quite happy to have discovered this Temperature display and Fan controller thanks to ActionRetro on his Youtube channel.
It is not really cheap, but for $20, you have a device with 3 temperature probes, displaying the T.



You can manually adjust the fan Speed with 3 settings (6, 9 and 12V).
The speed is adjusting automatically
Speed 2 starts at 40c
Speed 3 starts at 60c
You can also set up an Alarm T (40 to 90c) . Unfortunately, this does not have any impact on the T for automatic speed adjustment, just remain at 40 and 60.
I spent quite sometime with my Quicksilver, measuring the T of the CPU heatsink, Video card ans exhaust air to select the best combination Fan, Noise, Efficiency by using the BBQ thermometer, supposed to check the meat T

Would have been easier with this one.
I am right now measuring the Quicksilver again, will post later on the impact on the previous results.
Here is the link if you are interested.
https://www.amazon.com/dp/B01LN3YJPO?ref=ppx_yo2ov_dt_b_product_details&th=1It is also available on Aliexpress at $7.40 but $10 for shipping.
If enough people are interested, may be macos9lives might negotiate a deal like for the Sinloon IDE to SATA bridge
https://www.aliexpress.com/item/3256802500827769.html?spm=a2g0o.productlist.0.0.7d82772fhCyvC4&algo_pvid=f5edce76-9777-4344-b65a-8e1925bd755b&algo_exp_id=f5edce76-9777-4344-b65a-8e1925bd755b-3&pdp_ext_f=%7B%22sku_id%22%3A%2212000021717837748%22%7D&pdp_npi=2%40dis%21USD%2110.88%217.4%21%21%21%21%21%402101d91e16617013666262095ea02e%2112000021717837748%21sea&curPageLogUid=Kvm9UmkBkWGu