not really dropped. infact i had to increase powerlimit as it became unstable,

here are my OC settings

log info :
[ 0d 1h50m26s] 449(447.4)Sol/s 857(853.3)W
0>GTX 1080 Ti ` 100% [45°C/50%] 33.86 I/s 68.3(67.7)Sol/s 135(134.4)W clk=1430MHz mclk=4957MHz Sol/W=0.50
1>GTX 1080 Ti ` 100% [47°C/50%] 33.81 I/s 68.0(67.3)Sol/s 124(122.9)W clk=1341MHz mclk=4957MHz Sol/W=0.55
2>GTX 1080 Ti ` 100% [47°C/50%] 39.62 I/s 79.1(79.1)Sol/s 151(148.8)W clk=1607MHz mclk=5454MHz Sol/W=0.53
3>GTX 1080 Ti ` 100% [44°C/50%] 38.54 I/s 75.9(76.9)Sol/s 147(148.2)W clk=1620MHz mclk=4957MHz Sol/W=0.52
4>GTX 1080 Ti `98.8% [43°C/50%] 39.54 I/s 79.3(78.9)Sol/s 150(149.3)W clk=1683MHz mclk=4957MHz Sol/W=0.53
5>GTX 1080 Ti ` 100% [49°C/50%] 38.90 I/s 77.3(77.5)Sol/s 149(149.4)W clk=1620MHz mclk=4957MHz Sol/W=0.52
[ 0d 1h50m36s] 448(447.4)Sol/s 860(853.4)W
0>GTX 1080 Ti ` 100% [45°C/50%] 33.86 I/s 68.1(67.7)Sol/s 136(134.4)W clk=1379MHz mclk=4957MHz Sol/W=0.50
1>GTX 1080 Ti ` 100% [48°C/50%] 33.82 I/s 67.9(67.3)Sol/s 124(122.9)W clk=1354MHz mclk=4957MHz Sol/W=0.55
2>GTX 1080 Ti ` 100% [47°C/50%] 39.63 I/s 79.6(79.1)Sol/s 150(148.8)W clk=1607MHz mclk=5454MHz Sol/W=0.53
3>GTX 1080 Ti ` 100% [44°C/50%] 38.54 I/s 75.8(76.9)Sol/s 150(148.3)W clk=1645MHz mclk=4957MHz Sol/W=0.52
4>GTX 1080 Ti `98.8% [43°C/50%] 39.54 I/s 79.1(78.9)Sol/s 150(149.3)W clk=1657MHz mclk=4957MHz Sol/W=0.53
5>GTX 1080 Ti ` 100% [49°C/50%] 38.90 I/s 77.5(77.6)Sol/s 150(149.4)W clk=1620MHz mclk=4957MHz Sol/W=0.52
we are sorry, but maybe we did not understand exactly what you consider to be the problem.
With --oc1 we expect that the cards with less power would benefit more.
Could you paste here right the beginning of the log? (Right after "******** miniZ v1.2m ********")