No need for investigation, the problem is commonly investigated. The Heatsink itself limits the Performance. Uneven CPU thermals! - #303 by PSierra117 Check this Thread in Sep/Oct 24 i developed a modification which gives you the full headroom. You need to remove the Shim from the Vaporchamber and put a 20x20x0,8mm Coppershim sandwiched in PTM on there and Done.