Originally Posted by Belial
Again with the snide comments, that's okay. I make perfectly clear in the review that I'm testing on the IHS, not on die, and in the post I specifically state that on-die is different than IHS, and that most likely, differences in thermal paste performance would be exaggerated when put on-die (vs standard IHS).
I have checked many review sites. Not a single site shows a difference between Ultra vs Pro, but for the most part, very few sites have even reviewed either CLU/CLP.They are all NOT within 2-6*C range of eachother, including AS5.
You are most likely looking at outdated benches from years ago. 10 years ago,all pastes were within 2-6*C of AS5, on the IHS, yes.
Today, all high end pastes are within 2-6*C, sure - Gelic GC Extreme, NH-T1, PK-3, Shin Etsu.
However, all of today's high end pastes, are likely going to be 5-10*C+ over pastes like AS5.
Not to mention, AS5 was a terrible paste 5 years ago when most benchmarks were done (i mean, most are around 5-2 years old it seems).
Those are also the results of my own test. I found, consistently, in my testing, that PK-3 was 5*C better than PK-1. Which, consistently, is about 2-3*C better than AS5. You can do the math to figure out the difference between PK-3 and AS5. You can also probably do the math and figure out how AS5 compares to CLU/CLP, which are not conventional thermal pastes, but more in the line of Phobya Hegrease, IC Diamond, and Indigo Extreme - they are thermal 'applicants' of a different nature. Most basically, they are not ceramic based, and they are significantly higher in price (considering about 99% of pastes are under $10 for 5g, $8 for 3.5g, and $5 for 1.5g), and generally much more difficult to apply.
My results are hardly authoritative, but I'd bet money that AS5 is at least 10*C worse than CLU/CLP, especially when put on-die.
Yes, 1-3*C is a huge deal of difference when it comes to thermal pastes. You'd be hard pressed to find 1-3*C difference in modern pastes - nh-t1, gelid, hegrease even, pk2, pk3, mx-4, even clu/clp are close within that range on IHS applications. But AS5 is such a terrible thermal paste, being over a decade old after all, that it's much more than 5*C worse than modern pastes. That's how terrible it is, that stock paste performs better than it these days.
As I said before - look at how much CPUs and GPUs have evolved in the last 13 years. TIM has evolved just as much.
This thread moves insanely fast, but to the person using AS5 - get a modern paste (it'd be a great chance for you to get CLU/CLP right now, but any modern paste would be fine, you can get something like 1.5g of pk3 or masscool for under $4 shipped on ebay). You'll have significant temp drops, a more dramati temp drop using a good thermal paste, than if you switch from a hyper 212 to a 120mm closed loop/mid range cooler, or even something like an H60 vs nh-d14. It's not that getting a thermal paste will provide a dramatic drop in temps, it's that switching from a terrible paste like AS5 to a half decent one, would provide a dramatic drop in temps.
I'd bet money that the stock intel paste on the IHS is better than AS5.