Mainstream Intel CPUs from Ivy Bridge till the newest Coffee Lake themselves have inefficient stock thermal paste and excessive gap underneath the IHS so these factors also need to be taken into the account. The thermal results won't be as accurate as the ones tested on the enthusiast-class CPUs (ie. 3930K etc) with soldered thermal interface. Furthermore, bigger chips like the 3930K have larger contact surface than the smaller CPUs.
G3D: performs similarly compared to Kraken X62 (based on 4790K)
Vortez: beats Kraken X62 by 13C (based on 3930K)
OC3D: outperforms Kraken X62 by 14.5C (7700K @ 5.0GHz)