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With both the stock retention system and the contact frame I noticed a huge variance in core temperatures. Generally the hottest cores were 12-13 C higher than the coolest cores. Also, until delidding, cores #5 and #7 were always the hottest two, and cores #0 and #1 were the coolest. Lapping the IHS provided a measurable difference, although again not quite as much as expected. There was only a maximum benefit of 3 C on the hottest cores, but overall the majority of the cores stayed a few degrees cooler throughout the duration of the test.
Things get interesting with the EKWB Velocity2 Direct Die block. As mentioned before, my first test went wrong immediately and I knew something was wrong. After reapplying the Conductonaut and then remounting the block, the numbers looked very good. The hottest core was a full 13 C lower than stock and 9 C lower on the coolest core. Overall I was pretty satisfied with this result and felt that the annoyance of the EK mounting system may have been worth the hassle. I felt that way right up to testing the Iceman.
There is no need to beat around the bush here, the Iceman Cooling direct die block has ASTOUNDING performance. The package temperature was a full 11 C lower than with the EKWB block. That’s 24 C lower than stock under load! Only one core exceeded 80 C, and oddly enough, that was core #3, not #5. The hottest any other core hit was 76 C.
I did notice a couple of interesting things when checking out the all the data. All three results before delidding pulled over 360 watts maximum during their Cinebench loops. Despite the fact that all the motherboard settings were unchanged from before (I did double check this) the CPU drew less power after delidding. During their R23 loops, I only measured 356.49 watts while using the EKWB block and 350.41 with the Iceman mounted. Also, the Iceman results were the only where the package temp did not match the hottest core, but it is also the only result in which the hottest core was not #5. This tells me that the package temperature sensor is very close to core 5, or core 5 is the sensor used to report package temps.
