WHOA WHOA WHOA!!! DO NOT DO THIS!
"use a vacuum cleaner to remove any dust form inside"
ARE YOU CRAZY? waaay too much static, might as well run a lightning rod into your motherboard... go down to wallmart's electronic section and ask about a "can of air" follow the instructions on the can to dust your computer. also a tip for your fans, use zip ties, they hold better than screws and you can put them anywhere. but to your overheating problem i am having the same issue which is how i found this thread, i'm to the point where i think overheating just once has caused chronic problems, i'm going to rearrange the fans i have and add a third case fan and if that doesnt work i have an older gpu laying around that i'm going to install but for all my research this seems to be my only option.