Ok, the numbers, first cpu TB 1520@2.12V =120W ,100% Seti load. With this WB the temp. is 44°C (c/W=0.2), then I made another test with 2.5Cu plate bolted on the base of the WB with arctic silver between and temp dropped to 38°C (c/W=0.15) . With my old big homemade Cu WB I get 33°C (c/W=0.11).Room temp was 20°C, water temp 22°C. So the problem with WB is to thin base. I'll make few blocks with different base thickness and tested them to find optimal one.
That kind of camera would be nice, but no way I could get it.
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