Wasn't really stable at -0.15vcore offset so now I'm at -0.125vcore. So far so good. Current vcore ranges from 1.200 to 1.260. By having CAM, RGB Fusion 2 and iCue running in the background, I actually lose 200 points in CB15 so I switched them off and finally got a proper score
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Cooled by NZXT Kraken X62 with its stock 2x AER P140 fans in pull configuration, conducted by Cooler Master Mastergel Pro TIM.

Mobo: Gigabyte Z390 AORUS Elite
RAM: GSkill Trident Z RGB 3200mhz on XMP profile 8GB x4

The last rig I did any tweaking or overclocking was my i7 920 rig