Johnny-1987

Vlada011
I think you should use pre-installed thermal paste.
Except if you mess up with installation. 
And I think if you check temperature with pre-installed and thermal grizzly temps will be same.
A lot of people report increase in temperatures 1-2-3C after they replace default paste on CORSAIR AIO Systems.
They tried to decrease and then figure out that pre-installed paste is very good. I think it's more because installation method and perfect layer.
 
 
Smaller or bigger difference between cores is normal.
My 6 core is lazy example and lower temps 3-5C than others, i7-5820K.
You can't change that even with delid, that's sensor inside, don't worry.
Always look main temperature, CPU Package example in AIDA64 and HWInfo.
That's few degree higher than Core Temps but at least CPU will stay in safe zone. 
Max CPU Package should be 85C in Stress test, never allow him to go more, Cores will stay around 80C.
 

Hey Vlada011 thanks for the reply. 
 
What do you mean by always look main temperature ? I use coretemp or Hw monitor and look at the 8 core temps that way.

Vlada011

Johnny-1987

Vlada011
I think you should use pre-installed thermal paste.
Except if you mess up with installation. 
And I think if you check temperature with pre-installed and thermal grizzly temps will be same.
A lot of people report increase in temperatures 1-2-3C after they replace default paste on CORSAIR AIO Systems.
They tried to decrease and then figure out that pre-installed paste is very good. I think it's more because installation method and perfect layer.
 
 
Smaller or bigger difference between cores is normal.
My 6 core is lazy example and lower temps 3-5C than others, i7-5820K.
You can't change that even with delid, that's sensor inside, don't worry.
Always look main temperature, CPU Package example in AIDA64 and HWInfo.
That's few degree higher than Core Temps but at least CPU will stay in safe zone. 
Max CPU Package should be 85C in Stress test, never allow him to go more, Cores will stay around 80C.
 

Hey Vlada011 thanks for the reply. 
 
What do you mean by always look main temperature ? I use coretemp or Hw monitor and look at the 8 core temps that way.

I look CPU Package in HWInfo.... because it's little higher than core temps...
 

bob16314
The reason you're getting core spikes is because a core, or cores, is/are assigned/doing more work sometimes..That's normal and expected.

Thermal Grizzly makes different compounds, so it depends which compound you're talking about..Just saying "Thermal Grizzly" is pretty vague.

If you're talking "Thermal Paste" from Thermal Grizzly, then it's hard to tell if it would be better than the stock TIM that Corsair uses now (whatever it is, they used to use Shin-Etsu stuff) on their cold plates.

If you're talking "Liquid Metal" TIM like Conductonaut from Thermal Grizzly (and others), you're in a whole different ballpark and you would almost certainly see much lower temperatures across-the-board (idle to load) than you would with a conventional Thermal Paste.

Conductonaut completely blew me away by the temp drops that I documented here in one of my threads, you can check it out..It has a Thermal Conductivity of 73 W/mk..You want to compare "Thermal Conductivity" between different brands/types of TIM..Although I do think that what made the biggest difference for me was de-lidding my processor and replacing Intel's stock Thermal Paste with Conductonaut rather than just on the cooler's cold plate, but I did it all at the same time, so...

Intel uses solder in an i9-9900K, so don't try to de-lid the thing conventionally (or at all) or you'll destroy it.

I will never use Thermal Paste again on things that I really care about.

Johnny-1987
Also not to mention, if i was to Delid the 9900k and use the liquid metal i'd definately see a decrease in temps i'd imagine, would you use liquid metal again when mounting the cooler or just the standard kyronaut paste  ?

bob16314
You can use the de-lidding tool (not a utility knife blade like I used on my 8700K) more about that here.

bob16314

Johnny-1987

bob16314
You can use the de-lidding tool (not a utility knife blade like I used on my 8700K) more about that here.

So i can use the delidding tool even if they use solder? What did you use to clean all the old plastic and clean the intel TIM they used off the cpu ?

They used the tool with no problem in that instructional video in the link.
 
I used a razor blade to remove the sealer they used on the IHS, and rubbing alcohol and a cloth to clean off the old TIM..Then I applied Conductonaut to the CPU and put in the socket..Then I applied Conductonaut to the IHS..Then I put a very small amount of automotive silicone sealer on the 2 'wings' of the IHS and put it on the CPU and clamped it in..It was easy to do.
 
I don't think you'd really need to heat up the solder.