Next update. I cleaned the die and applied Kryonout thermal paste. The temperature problems under load persist. I can run Cinebench, but the CPU throttles down to around 5GHz. Strangely enough, idle temps actually dropped when using the thermal paste. Maybe because it is thicker. Looking at the cooler and die afterwards, it looks to me like there is some contact in the middle of the die and little to no contact around the center towards the edges. This would explain the poor temperatures. Also, I noticed that when assembled the little arrow on the cooler points up and right, while in the assembly documentation from EK it shows down and left (in line with the little arrow on the CPU pcb). The rest of the waterblock is oriented correctly, so I am wondering if EK assembled this one incorrectly? I am hitting a wall here. May need to give EK a call next week to sort it out. Cleaning up the die Adding Kryonout The contact pressure imprint on the die and cooler. Note the arrow. When assembled this points up/right, but on cpu it points down/left. ☹️ Any more suggestions before I call EK?