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So what went wrong? Noctua NH-D15 vs Corsair H100i Pro

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Posted · Original PosterOP

Hi! I am new to LTT Forum.


My specs:

Ryzen 7 3700X (stock speeds, default Performance settings)

ASUS X570 Prime-P


Noctua NH-D15



8 months ago, I bought a Corsair H100i Pro AIO to replace the AMD stock cooler. Despite re-seating it a couple of times, my temps were:

Furmark CPU Burner: 80.05 degrees Celsius
AIDA64 CPU Package: 85 degrees Celsius


A week ago, I bought the Noctua NH-D15 from NewEgg and installed it. I had to replace the 2nd fan with a smaller 120mm Cooler Master Scythe fan (2000RPM) as the RAM sticks were quite tall and my case side panel barely fits if I install the 140mm Noctua fan.


Guess what, my temps now are:

Furmark CPU Burner: 68 degrees Celsius
AIDA64:CPU Package: 73 degrees Celsius


Wow! A big difference! Any ideas on why are the temps difference so large? Is the Corsair H100i Pro AIO really weak against the Noctua NH-D15? Or a defective H100i Pro?

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