So, v1.5q2 seems to have fix issue with low h\r in 144.5 on my 1080s. After <5min run I even see higher I\s, though by 0.15%

But at least it is on pair with v1.3
Question, does OC1/OC2 work for all algos? What determines "power saving" to use OC1 vs OC2?
oc1 gives you max power saving and efficiency.