I decided to test various intensity settings for Suprminer 1.6, eliminating as many variables as possible.
For this test: I used a single 12 GPU 1080Ti rig on Windows split into three mining instances. All three mining instances were balanced to get as close to the same hash rate as possible. Each mining instance is running at the same time on the same machine on the same pool .
All three instances have GPU target power set to 80%, fans at 75%, no overclocking.
The instances/rig are managed by Awesome Miner, which restarts the miners for various reasons, based on rules I set.
The plan is to do three rounds of testing, each round lasting approximately 12hrs, at the conclusion of each round I'll rotate the miner to a new instance, until each miner has had a chance to run on each instance. I'll also normalize the results to averaged blocks foundperround.
Suprminer 1.6 - no dev fee
Going from an intensity setting of 19 to 20, yields a 10% improvement, a notable difference. The gain from 20 to 21 is much lower, less than 2%.
I've also anecdotally noticed that some GPUs can handle handle an intensity setting of 21 better than others. What I mean is that it seemed that the spread of MH/s (High/Low) on GPUs with an intensity of 21 was greater than on any other intensity setting. For example on an instance running -i 21, the slowest card might be at 14MH/s and the fastest card would be at 20MH/s. Keep in mind that these are all 1080Ti's
Seems to me, that there might be some more gains when optimizing intensity on a per GPU basis.
For what it's worth, I run my 1080/1080Ti's at -i 21 and my 1070Ti's at -i 20. If I get bored or have too much free time, I might experiment with testing optimizing intensity settings on the 1080's or even on a per GPU basis.. but that would take a lot of time.
Round 1 - 146 Blocks Found - Duration: 720 minutes (zero restarts or downtime)
[Instance 1] Normalized: 102.96 RVN / Raw: 104.15 RVN | -i 19 Pool Link
[Instance 2] Normalized: 109.83 RVN / Raw: 111.10 RVN | -i 20 Pool Link
[Instance 3] Normalized: 110.55 RVN / Raw: 111.83 RVN | -i 21 Pool Link
Round 2 - 128 Blocks Found - Duration: 684 minutes (zero restarts or downtime)
[Instance 1] Normalized: 137.80RVN / Raw: 122.21 RVN | -i 21 Pool Link
[Instance 2] Normalized: 122.27 RVN / Raw: 108.43 RVN | -i 19 Pool Link
[Instance 3] Normalized: 133.00 RVN / Raw: 117.95 RVN | -i 20 Pool Link
Round 3 - 159 Blocks Found - Duration: 621 minutes (zero restarts or downtime)
[Instance 1] Normalized: 104.63 RVN / Raw: 115.26 RVN | -i 20 Pool Link
[Instance 2] Normalized: 104.19 RVN / Raw: 114.78 RVN | -i 21 Pool Link
[Instance 3] Normalized: 86.07 RVN / Raw: 94.82 RVN | -i 19 Pool Link
Normalized Average Results
#1 - 117.52 RVN -i 21
#2 - 115.82 RVN -i 20
#3 - 103.77 RVN -i 19
Raw Average Results
#1 - 116.27 RVN -i 21
#2 - 114.77 RVN -i 20
#3 - 102.47 RVN -i 19