I'm sorry, but honestly,, I have to reiterate, that there is absolutely not one single solitary reason in the entire universe's of all that have existed or will ever exist to use your fingers or a card or anything else of any imagination when applying Arctic Silver 5.
However, one can apply it any way they like, it's really a waste of time and effort though.
And this may not be true for all pastes, cause there is a lot of pastes out there that just plain suck.
They are not all equal, and AS5 beats them all.
It is up there with the best, but it does not beat them all.
Tuniq TX-2
Innovation Cooling Overview
Don't get sucked in by short term tests done on review websites...
AND... especially not those quoted in the manufacturer's advertising.
Does this stuff hold it's temperature over time... like 6 months to a year?
As pointed out with the Toothpaste article, there are lots and lots of thermal compounds --including sandwich spreads-- that can lick the pants off AS5 for the 20 minutes required for testing... But these things go through heat catalysed changes over time and very often the "big gains" (2 degrees? LOL) disappear outright in the first month after application.
I worry about 2 things with thermal compounds...
1) Is the chip operated within it's thermal safety limits?
2) Does the compound hold it's characteristic up over time.
I could not care less what the actual temperature is... Heck that's going to change with room temperature anyway... everything runs hotter on a hot day, my friend.
Spending all your hard earned cash for 1 and 2 degree differences is a fool's errand at best.
One of the reasons Zinc Oxide paste is still around, after all these years, is that after it's initial curing phase, it will last for
decades.