ARCTIC MX-4 Carbon Based High Performance Thermal Compound
This is a great compound from Arctic Cooling although it's a thick paste and isn't as easy to apply as some of the other pastes to make our list. It's offered in five gram packages and rated at a thermal conductivity of eight point five watts per meter kelvin (8.5 w/m*k) placing it among the best thermal pastes. In tests it performance is not quite as good as the best performing compounds but it remains near the top of the heap. It is non-conductive and non-corrosive so it won't harm sensitive PC components. If bang for your buck is one of your top priorities, this offering deserves a close look.