i normally use artic mx-4 thermal paste does not change the performance that much so just use any
Arctic MX-4 (Not to be confused with Arctic Silver, they are different companies)
Arctic Silver is metal bearing and has a curing time. If you get it on the motherboard or CPU it can create a short. It has a long reputation, but it really doesn't come near the top end of performance any longer.
Thermaltake, Tuniq, and a few other brands make thermal compound that are all around the same performance level. Basically just go a step above the cheapest and you have decent thermal compound.
I always rrecommend Arctic Silver
I'm stuck between artic silver 5 vs artic mx 4 Anyone know which is better for liquid cooling?
Arctic Silver 5 should be just fine.
To be honest any will do just fine. No thermal paste works best with different type of coolers. Look at any thermal paste that a store sells some are better than others but temp difference is so small.
There is only a 1-3 degree difference between the most expensive pastes and average pastes. You have to get into exotic stuff like liquid metal to get better results. Or de-lidding and lapping.
Also depends on the CPU cooler. Very shiny nickel plated coolers need a more fluid paste. Rougher bottomed coolers, and those with exposed heatpipes, should rely on thicker compounds to fill in the large gaps. Arctic MX-4 is a nice mix between the two extremes.