Hi Vythica,
I'm not as knowledgeable as some here, but now that it seems that no one is going to reply, I'll give it a go. Your cpu is fine at those temps, my G751jy runs higher than that running BF$ and Skyrim with 600 plus mods.
Everyone is all in an uproar about G-sync. Maybe that's why your thread isn't getting much attention. I would say that if your machine has no stickers on it, you are probably out of luck. But you probably paid less than what they ask for for these lappies with the stickers AND there will probably be a hack to give G-sync to us other unfortunates.
Do a search for overclocking and you will get lots to read in short order. I have never had much luck, so I don't bother. But these laptops are sold at a premium for a reason so have at it!