Tuning Arguments

Tuning Arguments

This is the full argument reference. The argument names and SMU semantics match RyzenAdj.

Not every CPU supports every argument. Which arguments work depends on your CPU's socket group. The authoritative list for your machine is always:

zenmaster --help

It prints only the supported arguments, grouped and with units. The tables below are the union across all families.

How to read this

• Unit: the unit of the integer value you pass. mW is milliwatts, mA is milliamps, plus MHz, °C, mV, and s for seconds.
• Type: value takes =value, flag takes no value.
• Negative values wrap to unsigned 32-bit (used by Curve Optimizer offsets like --set-coall=-20).
• Flag arguments ignore any value you pass.

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Power limits

Argument	Unit	Type	Description
--stapm-limit	mW	value	Sustained Power Limit — STAPM LIMIT
--fast-limit	mW	value	Actual Power Limit — PPT LIMIT FAST
--slow-limit	mW	value	Average Power Limit — PPT LIMIT SLOW
--ppt-limit	mW	value	Platform Package Tracking power limit (desktop)
--apu-slow-limit	mW	value	APU PPT Slow limit for A+A dGPU platform — PPT LIMIT APU
--stapm-time	s	value	STAPM constant time
--slow-time	s	value	Slow PPT constant time

Thermal

Argument	Unit	Type	Description
--tctl-temp	°C	value	Tctl Temperature Limit — THM LIMIT CORE
--chtc-temp	°C	value	CHTC Temperature Limit
--apu-skin-temp	°C	value	APU Skin Temperature Limit — STT LIMIT APU
--dgpu-skin-temp	°C	value	dGPU Skin Temperature Limit — STT LIMIT dGPU
--skin-temp-limit	°C	value	Skin Temperature Power Limit

--apu-skin-temp and --dgpu-skin-temp are scaled by 256 internally (they are temperatures). --skin-temp-limit is a power limit and is not scaled.

VRM & Currents

Argument	Unit	Type	Description
--tdc-limit	mA	value	Thermal Design Current Limit — TDC LIMIT
--edc-limit	mA	value	Electrical Design Current Limit — EDC LIMIT
--vrm-current	mA	value	VRM Current Limit — TDC LIMIT VDD
--vrmmax-current	mA	value	VRM Maximum Current Limit — EDC LIMIT VDD
--vrmsoc-current	mA	value	VRM SoC Current Limit — TDC LIMIT SOC
--vrmsocmax-current	mA	value	VRM SoC Maximum Current Limit — EDC LIMIT SOC
--vrmcvip-current	mA	value	VRM CVIP Current Limit — TDC LIMIT CVIP (VanGogh only)
--vrmgfx-current	mA	value	VRM GFX Current Limit — TDC LIMIT GFX
--vrmgfxmax-current	mA	value	VRM GFX Maximum Current Limit — EDC LIMIT GFX
--psi0-current	mA	value	PSI0 VDD Current Limit
--psi0soc-current	mA	value	PSI0 SoC Current Limit
--psi3cpu-current	mA	value	PSI3 CPU Current Limit
--psi3gfx-current	mA	value	PSI3 GFX Current Limit
--prochot-deassertion-ramp	n/a	value	Ramp time after PROCHOT deasserts; higher = tighter post-throttle limits

Clocks

Argument	Unit	Type	Description
--max-cpuclk	MHz	value	Maximum CPU clock frequency
--min-cpuclk	MHz	value	Minimum CPU clock frequency
--max-gfxclk	MHz	value	Maximum GFX clock frequency
--min-gfxclk	MHz	value	Minimum GFX clock frequency
--gfx-clk	MHz	value	Forced GFX clock speed (Renoir only)
--max-socclk-frequency	MHz	value	Maximum SoC clock frequency
--min-socclk-frequency	MHz	value	Minimum SoC clock frequency
--max-fclk-frequency	MHz	value	Maximum Infinity Fabric (CPU↔GPU) frequency
--min-fclk-frequency	MHz	value	Minimum Infinity Fabric (CPU↔GPU) frequency
--max-vcn	n/a	value	Maximum Video Core Next (VCE) frequency
--min-vcn	n/a	value	Minimum Video Core Next (VCE) frequency
--max-lclk	n/a	value	Maximum Data Launch Clock frequency
--min-lclk	n/a	value	Minimum Data Launch Clock frequency
--oc-clk	MHz	value	Forced all-core clock speed (Renoir and up)
--per-core-oc-clk	MHz	value	Forced per-core clock speed (Renoir and up)
--set-boost-limit-frequency	n/a	value	Boost frequency ceiling
--set-vmin-freq	n/a	value	Minimum voltage frequency floor

Overclocking & Curve Optimizer

Argument	Unit	Type	Description
--enable-oc	n/a	flag	Enable overclocking mode (Renoir and up)
--disable-oc	n/a	flag	Disable overclocking mode (Renoir and up)
--oc-volt	mV	value	Forced core VID: (1.55 − target_V) / 0.00625 (Renoir and up)
--pbo-scalar	n/a	value	Precision Boost Overdrive scalar
--set-coall	n/a	value	All-core Curve Optimizer offset (negative = undervolt)
--set-coper	n/a	value	Per-core Curve Optimizer offset
--set-cogfx	n/a	value	iGPU Curve Optimizer offset
--set-gpuclockoverdrive-byvid	n/a	value	Set GPU clock overdrive by VID

Power states

Argument	Unit	Type	Description
--power-saving	n/a	flag	Apply power-saving profile (AC-unplugged behavior)
--max-performance	n/a	flag	Apply max-performance profile (AC-plugged behavior)
--enable-feature	n/a	value	Enable a CPU/SMU feature by feature ID
--disable-feature	n/a	value	Disable a CPU/SMU feature by feature ID

Query / get

All --get-* arguments are flags (no value) and read a value back from the SMU instead of writing. The value is shown in the CLI and exposed as returned in --json and in the library apply() result.

Argument	Description
--get-pbo-scalar	Query current PBO scalar value
--get-sustained-power-and-thm-limit	Query fused sustained power and thermal limit
--get-overclocking-support	Query overclocking support flags
--get-max-cpu-clk	Query maximum CPU clock limit
--get-min-gfx-clk	Query minimum GFX clock
--get-max-gfx-clk	Query maximum GFX clock
--get-curr-gfx-clk	Query current GFX clock
--get-pbo-fused-power-limit	Query PBO fused sustained power limit
--get-pbo-fused-slow-limit	Query PBO fused slow power limit
--get-pbo-fused-fast-limit	Query PBO fused fast power limit
--get-pbo-fused-apu-slow-limit	Query PBO fused APU slow power limit
--get-pbo-fused-vrmtdc-limit	Query PBO fused VRM TDC current limit
--get-pbo-fused-vrmsoc-current	Query PBO fused VRM SoC current
--get-pbo-fused-tctl-temp	Query PBO fused Tctl temperature
--get-coper-options	Query available per-core Curve Optimizer options
--get-cogfx-options	Query available iGPU Curve Optimizer options

Advanced / state

Argument	Type	Description
--disable-prochot	flag	Disable PROCHOT thermal throttle signal
--set-fll-btc-enable	flag	Enable FLL BTC mode
--set-vddoff-vid	value	Set VDD-off VID
--set-ulv-vid	value	Set Ultra-Low Voltage VID
--setcpu-freqto-ramstate	flag	Lock CPU frequency to RAM state
--stopcpu-freqto-ramstate	flag	Release CPU frequency from RAM state lock

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A note on values

• Power limits are milliwatts: 15000 means 15 W.
• Currents are milliamps: 40000 means 40 A.
• Temperatures are °C: 90 means 90 °C.
• --oc-volt takes a VID, not a voltage. Convert with (1.55 − target_V) / 0.00625. For 1.2 V: (1.55 − 1.2) / 0.00625 = 56.

Start conservative and test for stability. See the FAQ and Troubleshooting if a value is rejected or the system becomes unstable.