diff --git a/playbook.yml b/playbook.yml
index 17c0708..c6ba71e 100644
--- a/playbook.yml
+++ b/playbook.yml
@@ -8,9 +8,14 @@
     power_cap_half_float: "{{ power_max |float * 0.5 }}"
     power_cap: "{{ power_cap_float |int }}"
     power_cap_half: "{{ power_cap_half_float |int }}" # used to limit GPU power to 50% on 'low' perf modes
+    gpu_clock_min: "2300" # minimum GPU clock (in 3D) - defaults 500Mhz
+    gpu_clock_max: "2600" # maximum GPU clock (also 3D) - range allows up to 3000Mhz.  default 2529
+    gpumem_clock_max: "1075" # maximum GPU memory clock - default 1000Mhz, range allows 1075Mhz
+    # note: (all clocks based on my non-reference 6900XT)
+    # consult '/sys/class/drm/{{ card }}/device/pp_od_clk_voltage'
     card: card0 # default to card0
-    base_profiles: # standard tuned profiles available on Fedora, should dynamically discover?
-      - balanced
+    base_profiles: # list of source tuned profiles available on Fedora (TODO: should dynamically discover?)
+      - balanced   # these are further modified with secondary (templated) profiles, see 'templates/tuned.conf.j2'
       - desktop
       - latency-performance
       - network-latency
@@ -18,12 +23,7 @@
       - powersave
       - virtual-host
     amdgpu_profiles: # statically defined mapping of the contents in /sys/class/drm/{{ card }}/device/pp_power_profile_mode
-#      - { name: 'bootup_default', value: 0 }
-      - { name: '3D', value: 1 }
-      - { name: 'powersaving', value: 2 }
-      - { name: 'video', value: 3 }
-      - { name: 'VR', value: 4 }
-#      - { name: 'compute', value: 5 }
+      - { name: 'default', value: 0 }
       - { name: 'custom', value: 6 }
   handlers:
     - name: restart tuned
@@ -56,6 +56,28 @@
       with_nested:
         - "{{ amdgpu_profiles }}"
         - "{{ base_profiles }}"
+    - name: template AMDGPU clock control scripts (tuned profile dependency)
+      template:
+        src: templates/amdgpu-clock.sh.j2
+        dest: /etc/tuned/{{ item.1 }}-amdgpu-{{ item.0 }}/amdgpu-clock.sh
+        owner: root
+        group: root
+        mode: "0755"
+      with_nested:
+        - 'custom'
+        - "{{ base_profiles }}"
+      notify: restart tuned
+    - name: template AMDGPU clock control *reset* script (tuned profile dependency)
+      template:
+        src: templates/amdgpu-clock-reset.sh.j2
+        dest: /etc/tuned/{{ item.1 }}-amdgpu-{{ item.0 }}/amdgpu-clock-reset.sh
+        owner: root
+        group: root
+        mode: "0755"
+      with_nested:
+        - 'default'
+        - "{{ base_profiles }}"
+      notify: restart tuned
     - name: template custom tuned profiles
       template:
         src: templates/tuned.conf.j2
diff --git a/templates/amdgpu-clock-reset.sh.j2 b/templates/amdgpu-clock-reset.sh.j2
new file mode 100644
index 0000000..5e9b34b
--- /dev/null
+++ b/templates/amdgpu-clock-reset.sh.j2
@@ -0,0 +1,12 @@
+#!/bin/bash
+# script to reset tuned's AMDGPU clock control to default
+#
+# rendered by Ansible with environment-appropriate values:
+#   card #, eg: card0
+#   min/max GPU clocks
+
+# set control mode back to auto
+echo 'auto' | tee /sys/class/drm/{{ card }}/device/power_dpm_force_performance_level
+
+# reset any existing profile clock changes
+echo 'r' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
diff --git a/templates/amdgpu-clock.sh.j2 b/templates/amdgpu-clock.sh.j2
new file mode 100644
index 0000000..14bac41
--- /dev/null
+++ b/templates/amdgpu-clock.sh.j2
@@ -0,0 +1,33 @@
+#!/bin/bash
+# script for tuned AMDGPU clock control
+# clocks in 3D usage are dynamic based on need/usage
+#
+# this sets the minimums / maximums
+#
+# rendered by Ansible with environment-appropriate values:
+#   card #, eg: card0
+#   min/max GPU clocks
+
+# send a reset for a clean slate
+# echo 'r' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# set manual control mode
+echo 'manual' | tee /sys/class/drm/{{ card }}/device/power_dpm_force_performance_level
+
+# set the minimum GPU clock
+echo 's 0 {{ gpu_clock_min }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# set the maximum GPU clock
+echo 's 1 {{ gpu_clock_max }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# set the maximum GPU *memory* clock
+echo 'm 1 {{ gpumem_clock_max }}' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# boost offset voltage 100mV / 0.1V
+echo 'vo +100' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# commit the changes
+echo 'c' | tee /sys/class/drm/{{ card }}/device/pp_od_clk_voltage
+
+# force GPU memory into highest profile
+echo '3' | tee /sys/class/drm/{{ card }}/device/pp_dpm_mclk
diff --git a/templates/tuned.conf.j2 b/templates/tuned.conf.j2
index 1513389..90ff588 100644
--- a/templates/tuned.conf.j2
+++ b/templates/tuned.conf.j2
@@ -2,25 +2,6 @@
 include={{ item.1 }}
 summary={{ item.1 }} + TCP/RAID tweaks + AMDGPU pp_power_profile_mode = {{ item.0.value }} ({{ item.0.name }})
 
-[sysfs]
-/sys/class/drm/{{ card }}/device/pp_power_profile_mode = {{ item.0.value }}
-{% if 'VR' in item.0.name or '3D' in item.0.name or 'compute' in item.0.name or 'custom' in item.0.name %}
-{# TODO: if 'custom' profile: #}
-{#         set 'power_dpm_force_performance_level' to manual   #}
-{#         set individual clocks (eg: pp_dpm_mclk/pp_dpm_sclk/pp_dpm_pcie) #}
-{#         with user-provided values for those clocks #}
-# configure GPU power/clock characteristics
-# ref: https://docs.kernel.org/gpu/amdgpu/thermal.html
-/sys/class/drm/{{ card }}/device/power_dpm_force_performance_level = high
-# limit perf profiles to {{ power_max_multi * 100.0 |int }}% of the max power capability
-/sys/class/drm/{{ card }}/device/hwmon/hwmon9/power1_cap = {{ power_cap }}
-{% else %}
-# choose power saving dpm clock options
-/sys/class/drm/{{ card }}/device/power_dpm_force_performance_level = low
-# limit lower power modes to 50% of the max power capability
-/sys/class/drm/{{ card }}/device/hwmon/hwmon9/power1_cap = {{ power_cap_half }}
-{% endif %}
-
 [sysctl]
 net.core.default_qdisc=fq
 # 'bbr2' requires a [modified] supporting kernel - stock Fedora kernels do *not* support it (currently)
@@ -32,3 +13,31 @@ dev.raid.speed_limit_min=600000
 dev.raid.speed_limit_max=9000000
 # allow some games to run (eg: DayZ)
 vm.max_map_count=1048576
+
+{% if 'default' in item.0.name %}
+# reference/execute AMDGPU clock control *reset* script
+[gpuresetscript]
+type=script
+script=${i:PROFILE_DIR}/amdgpu-clock-reset.sh
+
+[sysfs]
+# configure GPU power/clock characteristics
+# ref: https://docs.kernel.org/gpu/amdgpu/thermal.html
+/sys/class/drm/{{ card }}/device/pp_power_profile_mode = {{ item.0.value }}
+/sys/class/drm/{{ card }}/device/power_dpm_force_performance_level = auto
+# give default profile {{ power_max_multi * 50.0 |int }}% (max) power capability
+/sys/class/drm/{{ card }}/device/hwmon/hwmon9/power1_cap = {{ power_cap_half }}
+{% endif %}
+{% if 'custom' in item.0.name %}
+[sysfs]
+# configure GPU power/clock characteristics
+# ref: https://docs.kernel.org/gpu/amdgpu/thermal.html
+/sys/class/drm/{{ card }}/device/pp_power_profile_mode = {{ item.0.value }}
+# give this custom oriented profile {{ power_max_multi * 100.0 |int }}% of the power capability
+/sys/class/drm/{{ card }}/device/hwmon/hwmon9/power1_cap = {{ power_cap }}
+
+# reference/execute AMDGPU clock control script
+[gpuclockscript]
+type=script
+script=${i:PROFILE_DIR}/amdgpu-clock.sh
+{% endif %}