Noctua NH-U9, U12S, U14S TR4-SP3 Threadripper cooler review

Cooling 192 Page 7 of 12 Published by


Preparing the System Overclock


Overclocking and tweaking then. Always invest in good hardware by the way (MOBO/PSU/Memory/Cooling), the cheaper motherboards often are not well tuned for enthusiast overclocking. Also get yourself a good power supply and proper processor cooling. Overclocking with a more core processor (it doesn't matter if that is Intel or AMD) is often far more difficult than you expect it to be. 


For this 16-core / 32 threads Ryzen Threadripper review round we'll use the three heatpipe cooler and the NZXT Kraken 140mm, nothing more.

Overclocking multi and many cores on a high clock frequency with Threadripper is a relatively okay to do the job, and can be managed relatively easily from the BIOS. You can also use AMD's software tool of course. Everything Ryzen and that includes the series 3 5 7 and now 12 and 16 core Threadripper processors reach roughly the same values as the 8-core Ryzen 7 series. This makes sense as the reality is that the processors die is all same, the 8-core die part with two CCXes however for Threadripper is binned, they only use the top 2% dies. That means lower voltages. During our measurements, by trial and error, we found that at ~1.375 Volts you will end up at roughly 4.0 GHz. You could apply a fixed voltage, but we do recommend a voltage offset (start with +200Mv).

BIOS Overclocking

The Guru3D reader-base overclocks mostly from the BIOS to try and find the maximum stable limit. The generic overclock procedure for multiplier based overclocking is as follows:

  • Leave base clock (bus) for what it is right now (100 MHz)
  • Set the per core multiplier to a maximum of your liking:
  • Example 1: 100MHz x 40 = 4000 MHz
  • Example 2: 125MHz x 32 = 4000 MHz
  • Increase CPU voltage; though AUTO works fine on many motherboards you can do it manually as well. Start at 1.325 volts (or voltage offset (start with +200Mv)) and work your way upwards into a state of equilibrium in perf and cooling temps.
  • Make sure your processor is properly cooled as adding voltage = more heat
  • Save and Exit BIOS / UEFI


We apply a simple three-step overclock:

  1. Enable 4000 MHz (40 Multiplier)
  2. Apply 1.380V to the CPU
  3. Enable XMP/ DOCP on our memory kit (ours does 3200 MHz CL14)

Ryzen Threadripper likes fast memory, so with this quad-channel setup we really can recommend higher frequency memory like the 2933 and 3200 MHz kits used. Save and exit, and you will boot with all your cores tweaked to 4.0 GHz into windows. 



Here is an example of the Ryzen Threadripper 1950X at 4000 MHz @ all cores. AMD explains that the Tdie score is the actual proper temperature readout.

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