Watttol

WattTool – used to reduce power consumption and overlock video cards produced by AMD. The program is suitable exclusively for miners. It can change the voltage and control the operating frequencies of video adapters. The utility is especially popular for theRXline, both480and580.
Download Wattol 0.92

Features of Wattol:

  • GPU Clock Speed ​​and Voltage: Works similar to WattMan. Clock frequencies are not limited to 5 MHz steps, but voltage is limited to 6.25 mV steps (rounding mode is enabled, so976 mVwould result in 981.25 mV).
  • Memory Clock and Voltage: Works similar to WattMan. The voltage is not the actual memory voltage (which is fixed at about1.5 Vor requires a hard refresh). The second voltage controller circuit is not used, so it is questionable whether the memory controller has its own dynamic voltage plane. I’m guessing the voltage set here is simply a lower limit for the core voltage. If you overclock your memory, always check for memory errors (this can be done using HWiNFO)
  • Fan and Power Settings: Nothing special here. There is no minimum fan speed limit, I can set it below the Wattman limit of 1040 rpm. The minimum speed is not directly used. I estimate that values ​​below 2200 are scaled by 2/3. So 2500 results in 2200 * 2/3 + 300 = 1760 (see screenshot), while 1800 results in 1800 * 2/3 = 1200.
  • Standard monitoring: These values ​​should be identical to the values ​​displayed in WattMan, and monitoring has (almost) no impact on performance.
  • I2C access: currently only works for the IR3567B controller at address 8 line 4 on the RX470/RX480 boards strong>. Access is synchronized with other tools such as GPU-Z or HWiNFO which can sometimes result in missing readings. Accessing I2C s greatly impacts performance and causes stuttering (even when dragging a window to the desktop). Changes to I2C settings are not permanent. They will return to default values ​​after turning off VRM.
  • VRM Monitoring: Disabled by default. Reading values ​​is not atomic, so VID and VOUT are not always synchronized. TheVDDCresolution is only7.8 mV.
  • Load Line Calibration: Eliminates voltage drop (on my card I get VOUT = VID +-1 mV). It’s actually not very useful.
  • Phase Gain: The reference RX 480 has the first three phases of the VRM connected to the 6-pin connector and the remaining three phases connected to the connector. After testing measured slot power consumption above80W,AMDimplemented a fix that shifts the load to the 6-pin connector. Default value for this parameter– DDD000 (hexadecimal). The maximum possible shift will be FFF000. Uniform load distribution (000000) slightly improvesVRMefficiency. At 000000 I get the temperatureVRMabout 3°C ​​lower, the power savings can be 2 to 3W. On non-reference boards, all/most phases are probably connected to the 8-pin header, so changing this setting is pointless.
  • Current Scale: The current one reported by the VRM will be scaled.On the referenceRX480the default value is60(hexadecimal). If you set it to 20, you will see thatGPU-Zreports about half the power consumption. This will double the available power before you reach your target power. But other materials will also only see half of the current one. Do not expect overcurrent protection to operate with this setting. The encoding of this value is unknown, and non-reference cards use other values. If you want to bypass the power limit, it’s probably safer to useEMBDor custombios (unlockedair bios der8auerfor reference boards signedAMD< /strong>).
  • Voltage offset: Available from -300 mV to +300 mV (not tested over full range). The input data is decimal and is multiplied by6.25mV. Thus, the valid range is from-48to48.

Wattol features:

  • Monitoring VRM and setting it up.
  • Maintaining profiles.
  • Change clock frequencies and voltage.
  • Changing video memory voltage.
  • Cooler and power settings.
  • Standard monitoring that does not impact performance.
  • Provides access to I2C.
  • Adjusting the load line.
  • Ability to scale current energy consumption.
  • Voltage change in the range of-300…+300mV.
  • Profiles can be passed as arguments via the command line. They can also be downloaded and saved via the GUI. For each processor you can add your own, individually configured profile. Data is entered via the command line.

Technical aspects

The application can only be used as a solution forVRM monitoring. The main client window displays detailed information about the current frequencies, RPM of the cooler, current VID values ​​and load level. The utility does not require installation on a computer, and its use is free of charge. On machines with video cards fromNVIDIAyou will not be able to activate the program.

Download Wattol 0.92

Wattol 0.92

Wattol's conclusions:

We have identified the following features of the program:

  • The operating frequencies of both video memory and AMD graphics card cores are adjusted.
  • Providing ready-made profiles for all video cards belonging to theRX series.
  • You can increase or decrease the voltage sent to the GPU.
  • You can control the fan speed.
  • Works in a portable format.
  • Convenient interface that is easy to work with.
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