diff --git a/tinygrad/runtime/support/am/amdev.py b/tinygrad/runtime/support/am/amdev.py
index 669e8bdd70..adcd131bfd 100644
--- a/tinygrad/runtime/support/am/amdev.py
+++ b/tinygrad/runtime/support/am/amdev.py
@@ -187,7 +187,10 @@ class AMDev:
     self.init_hw(self.gfx, self.sdma)
     self.pci_dev.write_config(pci.PCI_COMMAND, self.pci_dev.read_config(pci.PCI_COMMAND, 2) | pci.PCI_COMMAND_MASTER, 2)
 
-    self.smu.set_clocks(level=-1) # last level, max perf.
+    if (max_power:=getenv("AM_POWER_LIMIT", 0.0)) > 0:
+      self.smu.set_power_limit(max_power)
+      self.smu.set_clocks(level=None)
+    else: self.smu.set_clocks(level=-1) # last level, max perf.
     for ip in [self.soc, self.gfx]: ip.set_clockgating_state()
     self.reg("regSCRATCH_REG7").write(AMDev.Version)
     self.reg("regSCRATCH_REG6").write(1) # set initialized state.
diff --git a/tinygrad/runtime/support/am/ip.py b/tinygrad/runtime/support/am/ip.py
index 12bb947460..6119d7dc59 100644
--- a/tinygrad/runtime/support/am/ip.py
+++ b/tinygrad/runtime/support/am/ip.py
@@ -203,14 +203,25 @@ class AM_SMU(AM_IP):
     return {clck: [self._send_msg(self.smu_mod.PPSMC_MSG_GetDpmFreqByIndex, (clck<<16)|i, read_back_arg=True)&0x7fffffff for i in range(cnt)]
       for clck in clk_list if (cnt:=self._send_msg(self.smu_mod.PPSMC_MSG_GetDpmFreqByIndex, (clck<<16)|0xff, read_back_arg=True)&0x7fffffff)}
 
-  def set_clocks(self, level:int):
+  def set_clocks(self, level:int|None):
     clks = tuple([self.smu_mod.PPCLK_UCLK, self.smu_mod.PPCLK_FCLK, self.smu_mod.PPCLK_SOCCLK])
     if self.adev.ip_ver[am.MP0_HWIP] not in {(13,0,6), (13,0,12)}: clks += (self.smu_mod.PPCLK_GFXCLK,)
 
+    if level is None:
+      for clck in clks:
+        with contextlib.suppress(TimeoutError): self._send_msg(self.smu_mod.PPSMC_MSG_SetSoftMinByFreq, clck << 16, timeout=20)
+        if self.adev.ip_ver[am.GC_HWIP] >= (10,0,0): self._send_msg(self.smu_mod.PPSMC_MSG_SetSoftMaxByFreq, clck << 16 | 0xffff)
+      return
+
     for clck, vals in self.read_clocks(clks).items():
       with contextlib.suppress(TimeoutError): self._send_msg(self.smu_mod.PPSMC_MSG_SetSoftMinByFreq, clck << 16 | (vals[level]), timeout=20)
       if self.adev.ip_ver[am.GC_HWIP] >= (10,0,0): self._send_msg(self.smu_mod.PPSMC_MSG_SetSoftMaxByFreq, clck << 16 | (vals[level]))
 
+  def set_power_limit(self, watts:float):
+    ppt_limit = max(int(round(watts)), 1)
+    self._send_msg(self.smu_mod.PPSMC_MSG_SetPptLimit, ppt_limit)
+    if DEBUG >= 2: print(f"am {self.adev.devfmt}: GPU power limit set to {ppt_limit}W")
+
   def _aca_read_reg(self, bank_idx:int, reg_idx:int, ue=True) -> int:
     msg = self.smu_mod.PPSMC_MSG_McaBankDumpDW if ue else self.smu_mod.PPSMC_MSG_McaBankCeDumpDW
     return (self._send_msg(msg, (bank_idx << 16) | (reg_idx * 8 + 4), read_back_arg=True) << 32) | \