First off. I confess. Too lazy to search this whole thread to see if anyone else has this issue. So, SLI scaling is not working properly for my top (main) card. MSI shows the bottom card boosted %100 throughout a game. (BF primarily) and the top card fluctuates between stock and boost. But most stays at stock speeds. I power management mode, for BF4 set at Max Performance. Tried switching Prioritization between Power limit and temp limit with no change. So I went ahead and did a DDU and installed the 340.52 set and SLI speeds scaled properly again. Does anyone else notice this? And again. I was too lazy to search through the whole thread so sorry if I'm duplicating another post.