User Guide

 [AMD Public Use]
SOC Voltage setting
CPU Voltage setting
RYZEN MASTER – UNDERSTANDING PROCESSOR POWER DOMAINS
 The CPU Voltage setting influences how far the CPU Cores frequency can
be driven to a point of instability
 Platform Power Threshold (PPT) is the total power capacity in Watts at
the processor socket and includes Memory controller power for a CPU
(not for an APU)
 Thermal Design Current (TDC) is the total current capacity in Amps at
the thermal throttling limit of the processor
 Electrical Design Current (EDC) is the total current capacity in Amps that
can be supplied to the socket
22
CPU
Cores
Memory
Controller
APU GFX Voltage
setting
Core speed control
Core Disable control
SMT control
Memory Clock control
Board memory VDDIO &
VTT settings
APU GFX Clock control
CPU Power Domain SOC Power Domain
TDC (CPU)
EDC (CPU)
Each at reported at % of
capacity setting
Graphics
 The SOC Voltage setting drives the overclocking potential for the memory controller
and, if an APU, for the APU Graphics (GFX)
‒ The APU GFX Voltage is derived from the SOC Voltage and determines how far the GFX
frequency can be driven to the point of instability
 Power information is separated for CPU and SOC for APUs
‒ Total System Power (TSP) replaces PPT – CPU and SOC power are reported separately
‒ TDC and EDC are reported for the SOC domain separately from CPU
AMD Ryzen Master 2.6 Reference Guide | November 2020
TDC (SOC)
EDC (SOC)
Each at reported at % of
capacity setting