Originally Posted by yoshi245
Where'd you get that idea? AS5 is old, it works fine if you got nothing else, and probably a bit better after curing, but there's plenty of options that are better than it now. MX-4 > AS5.
Why's everyone so down on AS-5 just because it's "old"?
There are a few TIMs that beat it by less than a degree when tested side by side. In my experience, how well you apply the TIM and fasten the heatsink down play a much larger role. For instance, right now, I have Shin-Etsu X23-7783 on my Silver Arrow and I'm getting 3 or 4 degrees warmer on load than I did with the chillfactor paste that came with the Silver Arrow. I didn't think I did a good job this time and it shows. You have to heat up everything up with a hairdryer to get it to go on right. On the other hand, I never found AS-5 difficult to work with. Also, the break-in period doesn't seem to be as dramatic as it's made out to be. Put a small line down the middle and let the heatsink do the work. It's really not that thick in my opinion. I also think different pastes work better for different types of heatsinks: lapped, rough surfaces, polished surfaces, lapped cpu, etc.
This 80 way test in June 2009 shows AS-5 right at the top. Granted, I don't think MX-3 and MX-4 were out then, but still http://benchmarkreviews.com/index.ph...&limitstart=12
Here's another from the same time period showing similar results. http://www.hardocp.com/article/2009/...hootout_q209/4
I admit that MX-3 and 4 may be better as I haven't tried them, and I'm not trying to argue. I just wouldn't say to only use AS-5 only if you've got nothing else around. It's better than that. Hey, they actually sell it at RadioShack which is the only place anywhere near me that I can find thermal paste for a reasonable price!