Quote from: issie81 on July 17, 2019, 07:26:44 AM

Doc,

Is there any reason why CNR is close to 10c hotter then CN Haven?
clock speeds same on same machine when i switch to CNR the temps are close to 10c hotter

(1) If you wrote "Doc" because you meant to post in SRB's channel, the issue is that you're running the wrong miner if you care about power draw and efficiency.

(2) A general note that applies to all miners: the transitions from CNv1 to CNv8 to CN/r have added more and more computations to the main loop. CNv8 added a square root and a division, CN/r went further and replaced it with a string of random operations with a lot of multiplications that chew up cycles on gpus, but this work is still only related to two read/write mem accesses as in the original CN algorithm. The Heavy/Saber main loop adds a third mem access and a single division. The main loop is > 90% of the runtime, and the differences between the CN/r and Haven main loops are enough to push the power consumption significantly. The important factor is the amount of computational work necessary per mem access.