What Is Watttool AAnd Why Is It Used For

What Is Watttool AAnd Why Is It Used For


An easy utility that combines VRM-control and overclocking for the eatures RX 400 series  (nearly) all Watttool can do to assist VRM profile monitoring / modifying with Little and easy. You have to run WattTool as administrator if you get the “Failed Creation Mutex!” problem. This is because of other software that already runs admin-relevant and has the synchronisation mutex (e.g. GPU-Z or HWiNFO). If you close these tools first, you can launch WattTool as an ordinary user (and restart them after WattTool).

GPU clock and voltage:

Watttool -like works. Clocks not limited to increments of 5 MHz, however the voltage is limited to steps of 6.25 mV (rounding mode is up, so 976 mV will result in 981.25 mV).


Clock memory and tension:

works Watttool -like. The voltage is not the real voltage of memory (which is fixed to about 1.5 V or needs a ). The second loop voltage controllers are not used, therefore whether the memory controller has a dynamic voltage plane is questionable. Always check for memory issues if you overclock the memory (can be done with HWiNFO)

Settings for fans and power:

nothing noteworthy. Minimum rpm fan is not restricted, I can set a limit of less than 1040 rpm for Watttool. Minimum rpm is not directly employed. My estimate is that values less than 2200 are 2/3.

Default deactivation of VRM monitoring. Vid and VOUT are not always synchronised, hence reading the values is not atomic. VDDC is just 7.8 mV resolution.


Calibration loading line:

It decrease in voltage (I’m VOUT +- 1mV on my card). Not very helpful, in fact.

Winning phase: The RX 480 is attached to the six-pin connector in the first three VRM phases and to the slot in three other phases. Following assessment, AMD implemented a fix which puts the burden onto the 6-pin connector above the power demand above 80 W from the slots. DDD000 is the default value (Hex). FFF000 would be the largest shift conceivable. Slightly boosts VRM efficiency via equal load distribution (000000).

With a power reduction in the 2-3W range, around 3°C lower VRM times at 000000. In non-reference cards, all/most phases of this setting is probably tied to the 8-pin.

Current scale:

 scales the current VRM report. The default value for the reference RX480 is 60. (hex). You will see the GPU-Z report at almost half the power draw if you set it to 20. This doubles the power available before the power objective is reached. However, other things will see only half the current as well. Don’t expect this to work with the existing protection. Unknown is the encoding of this value and different values are used by non-reference cards. To circumvent the limit of power.

Using EMBD or the custom bios is generally safer (AMD signs for the unlocking air bios der8auer for reference cards).

  • Offset voltage: from -300mV to +300mV available (not tested over the whole range). The entry is decimal and increases by 6.25mV. The range is therefore valid from -48 to 48.
  • Profiles: Profiles can be entered on WattTool or loaded and stored from GUI as command line parameters.
  • Every card has a profile of its own. As command line options, you can add several profiles.
  • The index of the adapter is the list box number.

Oh hi there 👋
It’s nice to meet you.

Sign up to receive awesome content in your inbox, every month.

Share This


Wordpress (0)
Disqus (0 )
[an error occurred while processing the directive]