Originally Posted by justanoldman
Thanks for all the info.
I would guess around 62c also, but right now I am using AC5 between the ihs and cooler. I will use Ultra there when I get some more, that could be a couple more degrees I hope. I don't understand why lapping a really concave IHS did not help, but that might be part of the problem I am having. I can't find anyone, anywhere that has lapped an H100i, so I don't know if that is what I need to do to get it to fit better with the IHS.
Going from AS5 to CLU/CLP will be a dramatic temp drop, just on the ihs even. As in as big a temp drop as going from a hyper 212 to an h80, maybe even high end cooling like an nh-d14. AS5 is just so terrible, it's been terrible for a long time (dont you have some stock paste you can use instead, like what came with some good heatsink you bought or something?). 13 years ago it was good, but 13 years ago the pentium 3 or whatever was great too.
On top of that, going to not just a high end ceramique, but a premium thermal solution like CLU/CLP, you'll literally get temp drops of 10-20*C when used just on the IHS instead of as5. Why would you buy a 13 year old thermal paste, I can assure you many other companies, and even arctic silver, have been able to figure out a better paste. The idea that pastes don't make a difference is partially wrong - yes, the difference between modern, high end pastes is very little, but as5 is not modern, and it wasn't even high end 10 years ago. Then, CLU/CLP is more in line with phobya hegrease, ic diamond, indigo extreme, than pk-3, mx-4, nh-t1 - it's an extreme paste.
You don't have to hope. It's guaranteed your temps will be dramatically different if you use a decent paste on the IHS over as5. It's not just a couple degrees lost using as5... it's huge. I literally saw bigger temp drops using PK-3 over PK-1 than from going from a hyper 212 to H50 - and pk-1 is significantly better than as5, and pk-3, while one of the better modern pastes, is not in the same league as CLU/CLP. Then again you can buy a 1.5g of pk-3 for under $4, while 1.5g of CLU/CLP is about $15-23 shipped.
I'm considering lapping my chip. With taking my nh-d14 on and off so many times, I must have scratched the IHS at one point. Kinda nasty scratch, I wouldn't normally mind but it's right in the middle. I'm pretty delicate with these heatsinks, i've mounted heatsinks at least 50+ times by now, especially the nh-d14... must be the mounting system. I don't exactly want to go about lapping the nh-d14 though.