TechSpot were somewhat disappointed with the temperatures they were seeing on the new i9-9900k and so decided to do what many have been trying lately; delidding and replacing the TIM between the CPU and heatspreader. The results speak for themselves, when overclocking you can expect a 3-5C drop in temperature. This comes with the risk of cracking the die and ruining your CPU as well as definitively voiding your warranty, so do consider that when looking at the results.
"We know that soldering CPUs works a lot better than the paste method Intel's been using to cut costs, so we wanted to know how much better is the solder method used by the 9900K than the paste of the 8700K/8086K?"
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Derba8er shaved the silicon a
Derba8er shaved the silicon a few mm and cut temps another 10 degrees. Liquid metal showed a small improvement vs solder but not enough to make it worthwhile.
I believe it was 0.2 or 0.3
I believe it was 0.2 or 0.3 mm. A few mm would be through the entire die.
While I like being pedantic for its own sake as much as the next Internet person, I’m only bothering to post this so that anyone who might be interested in doing what you’re talking about gets the right scale in their mind and hopefully is less likely to go too deep and ruin their chip.
It looks like from Deba8ers
It looks like from Deba8ers testing that the issue is the increase in depth of the silicon combined with the large amount of solder used. The temperature of the die is dependent on the thermal material used but also how thick it is and both the silicon and the solder are thick than the silicon and paste in the prior models. The best results come from lapping the die.
The issue is that the overall
The issue is that the overall results are inconclusive for the core question since there was no testing done with the thermal compound that Intel uses on their 8th gen and older CPUs.
It is clear that it runs hot with the solder, but we do not know how much hotter it would be with the thermal paste.
I’ll leave this review made
I’ll leave this review made by Gamers Nexus to answer to that.
It’s a bit long, but very detailed.
I checked it out and it seems
I checked it out and it seems they used a high end thermal compound, and not the notoriously bad intel thermal paste. With the older intel CPUs, e.g., the 6700k, you can get a large temperature drop by simply delidding and replacing the intel stuff, with almost any other thermal paste.