>>52498169 probably up to 8000 grit https://www.youtube.com/watch?v=Y_tXF-pKn4Y These guys have been polishing stones to a mirror finish since forever.
>>52498166 When you have a very polished surface (for metals) it means that the surface is incredibly flat. When the surface of the CPU IHS and the surface of the heatsink are both at mirror finish, then it will increase surface area contact, thereby increasing metal-metal contact, increasing thermal conductivity and finally improve heat transfer through the heatsink.
You still need paste but its effect will be less pronounced because the surface will be doing a lot of the work.
>>52498201 because running individual IHSes on grindstones would significantly decrease production volume, they'd have to pay for the tooling, and in transport the finish is likely to get fucked up without better packaging.
I bought all the right grit years ago for my q6600 and never ended up doing it. Plan to do it 4770k after I get to delidding it but somehow I doubt I'll get to that either. I never go over 70 during full load at 4.5ghz anyway. It would be more for the science of it all.
>>52498460 This may be of interest to some people.
Thermal conductivity of silicon semiconductors: http://www.electronics-cooling.com/1998/05/the-thermal-conductivity-of-silicon/
Thermal conductivity of copper http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html
It seems that the process of heat transfer is rather limited by the die itself.
That still doesn't mean you shouldn't use metal heat sinks. Since metals have high thermal conductivity (it varies internally versus at the surface, which is why you see a lot of copper heatsinks plated with aluminum), they can sink heat into the air faster, as to not allow heat to build up close to the CPU.
>>52498858 >Doesn't make sense to me The centre is the most important. It will spread out over the CPU as the heatsink is pushed onto it, and there will be no air bubbles. The thermal paste will expand slightly as it heats up, so you don't want to place it too close to the edge.
>>52498858 You can see videos of people preparing thermal paste with Plexiglas sandwiches.
I believe that pasty faggot Logan did quite a few. Deal is, if you spread it by hand, you're guaranteed to introduce air holes because you're not a machine and there's zero chance of you being able to apply paste at a mirror-finish level of flatness.
There's also the fact that just using a sphere of thermal paste is simply easier to apply and doesn't introduce air holes because you allow nature to do all the work.
There isn't a correct way to apply thermal paste, because manufacturers produce differently shaped heatsinks and differently shaped CPU dies.
Consumer Intel CPU dies don't fill much more than a third or even a fourth of the IHS, but high-end Xeons fill the entire IHS. A "pea sized dot" would not work for high-end Xeons because you'd end up not covering a core.
>>52498347 I hope you're not considering using this without thermal paste... You would still need thermal paste regardless of how smooth the top of the CPU lid is. It'd still be metal-paste-metal either way.
>>52498935 do both. or a combination of both, rather. put a very thin layer over the surface, as smooth as possible. then put a smaller than usual amount in the middle. that way you get good coverage and if the right amount is used, very little spill.
>>52498347 there is no such thing as metal-metal either there is a thin layer of air inbetween, which isolates and heats up and fries your computer, or you ACTUALLY WELD THE CPU AND HEATSINK, then there is only metal conduction
You should only polish your IHS if you can polish it completely flat with some kind of machine. Don't do it like >>52505038 and polish it so you turn it into a concave bulge so the actual contact is reduced significantly.
If you can't polish it perfectly flat don't polish it at all.
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