for it to be successful, you need to focus on memory thermal pads having 100% contact with the heatsink, core temperature is secondary and others like mosfets and vrm, dont even bother. I did just this on my 3080 and core temp is 48c and memory temperature is around 74 - 78c. What i see, is that most of you trolls are focusing on vrm and mosfets and trust me there is no need as long as you keep your gpu clean, the only issue for them would be dust overtime but even though not much increase in temperature they would have, so focus on memory then core.