Ok performanse numbers. First I must say the block is very restrictive as I thought (even more) so normal submersible pump can't handle that. That's why I connected the block on direct line high preasure tap water, and open the valve so I got ~ 500l/h Water temp was constant 14°C my tbred 1700+ overclocked to 2700 MHz 2.025V where folding @ home temp was 26°C on Epox 8rda sensor. Results are ~4 degrees lower the with previous Cu block in my regular setup with water temps compensated.
After seeing this I'm very much thinking about using central heating circulating pump with head more then 10m and adjustable rpm's and skip radiator all together and just dig the holes near my basement computer room, lay some copper pipes and have high performanse ultra silent setup. And the room is also on the north side so the ground should remain relatively cool even on summer.
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