That my friend is organic even in my Event Log i get countless of them. I am attempting to findout how to cap the temps now by means of chat screen on mainweb page as that could help you. I am using MSI afterbuner on my new GTX770M there is a setting on there about temps. yet for the GPU to be getting that superior anything isn't right. Are the fans working mate ? i.e are the leaf blowers working? fairly best bet is to speak to @svl7 to see if he can do something around the Temp issue by means of a Vbios update. 90c is not natural on a GPU i attempt to be max 80c at greatest. but with my recent 770M i am only hitting 66-70c's when gaming and shadow playing at the same time on my NB. Only other thing i can say is repaste with new greese making sure on a gain duration pea is applied and view if that helps. I use MX-4 as IC-Diamond scratches the hell out of the CPU or GPU dies. I as well use Brasso on the Heatsink to lap it and clear that off with TIM cleaner as well.