Well, I'm quite sure we didn't change shit in the miner code either when you switched driver version .

This is the painful world of trying to develop against AMD's drivers. CN is perhaps the most sensitive algo of all when it comes to mem controller tweaks in the driver, and man do they hack that shit between driver versions sometimes. Unfortunately, AMD's incentives are rather to maximize the frame rate in the latest and greatest games than making sure CN miners are happy. So, there's not that much we can do unfortunately .