Asrock Z370 Pro 4 vrm thermal pad replacement. Original pad was 1mm thickness, replaced with 0.5mm thick Gelid Extreme pad. Board doesn't have a temp sensor for the vrm's but cpu does have a more consistent score in Cinebench R23. : r/overclocking
BIOSTAR :: Motherboard
Intel Core i7-8700K, Core i5-8600K, Core i5-8400 CPU Review