Unless you are trying to drop as many degree's of heat as you can because you cpu runs really hot just stick with Noctua paste,my friend got me to apply some new thermal paste that was blue and it dropped your temps by about 5 degree's in most case's but it also dried up in 2 or 3 months,I forget the name of the blue stuff.I'm asymbling my new "main" rig and ran into some trouble. Skipping the story, I had to remove my HSF from the CPU and will have to do it again for further troubleshooting. I used the thermal paste that it came with and when I reinstalled, I used the last of my Noctua NT-H1. Before you start posting about how bad it is and how great liquid metal is....
I went and read a bunch of reviews on paste. Some big names were at the top to include liquid metal (always at the top) and many silicone based pastes. Now many of the top rated pastes are just not available. Try getting anything Arctic that isn't AS5. MX4? Yeah maybe. MX5? Nope. MX6? Still no. Noctua NT-H2? Not from my preferred retailers. So struggling to find a highly rated TIM (Thermal Interface Media), looking at whatever chart you find, you'll see that the difference between exceptional TIM and "good" TIM is very little. Like maybe 4c? Maybe less. That is, compared to liquid metal it's only 2-4c different. I'm just not gonna waste my time and money with liquid metal.
I can recall when Arctic Silver 5 was the king. While It gets a bad rap today, it's still good according to reviews I read but I didn't get that. I mean even today AS5 is in the middle of the pack. I ended up getting a large tube of Prolimatech Pro-PK3. As it is towards the top of many reviews and because the difference between this and other high end pastes is so small, I think I will be happy with this TIM. Now if shipping was instant.
Noctua however has never let me down and it doesn't dry up and always performs great.