I bought an i5 8400 back when it was first released. Since then i have been having heating issues with cpu temp going to 90 degrees Celsius and above. After turning off the turbo boost from bios resolved the issue. I think it could be improper installation and it had preapplied thermal paste on it and since then i have not changed it and now i want to change it. I am confused with what thermal paste i should go with. Something like cooler master mastergel which is really cheap and comes with support items like a scrapper and cleaner or something from the premium range. I am also worried about the stock intel fan. Should i install an aftermarket fan or the stock fan will do?