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Old 2020-10-05, 08:27   #7
Just call me Henry
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Sep 2007
Cambridge (GMT/BST)

2·2,897 Posts

Originally Posted by VBCurtis View Post
OP- I've run LLR on this size of number on prebuilt machines with slow 2-channel memory, and running 3 instances was just about as fast as 4 but generated quite a bit less heat. That is, 3 is enough to saturate the memory on some quad-core machines. It takes some experimenting with threads-per-process and number of processes to find the sweet spot!
Better still might be to reduce the cpu speed to match the memory throughput and still use all cores. Generally lower speeds need less power/cycle. Experimentation might be needed there.
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