How to fix core temp delta on Noctua NH-D15S in The Witcher 3?
It's honestly embarrassing that I'm using a top-tier cooler and still getting lag in Novigrad. It felt like a slap in the face to Noctua's reputation. I found that the massive base of the NH-D15S was slightly tilted during install, leaving a gap that caused a 18-25℃ difference between Core 0 and Core 4, triggering local throttling. I tried enabling 'Extreme Performance' in the BIOS, but that just pushed the peak temp to 96℃ without fixing the delta—just adding more stress to the chip. I took the whole thing off and used a torque wrench to precisely calibrate the four mounting screws and flipped the front fan to a forced push config. The core delta immediately dropped to 5-8℃ and FPS stabilized at 80-90. I did have a slight clearance issue with my RAM sticks after the second install, but sliding the front fan up by 2mm solved it. Full load temps are now 68-74℃. I backed up the BIOS voltage and fan profiles just in case. Finally feels right.
