AMD Richland

12 AMD “RICHLAND” APU | HOT CHIPS 25 | PRAVEEN DONGARA | AUGUST 2013
TEMPERATURE-SMART AMD TURBO CORE
Activity from
Cac Monitors
Power
Calculation
Temp.
Calculation
P
calculated
Freq
V
T
calc
T
calc
<>
Max
Temp.?
Limit
P0
P1
Pboost2
...
If T
calc
< Limit  raise F,V
If T
calc
> Limit  lower F,V
New Operating F, V
T
calculated
Temp.
of other
TEs
*
If T
sense
< THRESHOLD
Apply Boost Scalar
Pboost0
On-die Temperature Sensor Readings
Pboost1
On-die
Temperature Sensors
(T
sense
)
 The real-time, power-based temperature calculations (T
calc
) include many
conservative assumptions about the nature of the cooling solution and
ambient conditions (e.g., 35°C external ambient).
 By supplementing our power-driven temperature calculations with on-die
temperature sensors (T
sense
), this feature is designed to deliver repeatable
higher performance for typical operating conditions.
Thermal Environment/
Condition
Die Temp
(in steady state)
Worst-case (max of spec)
(e.g., 35°C ext. ambient)
T
calc
== Max Temp. Limit
T
sense
== Max Temp. Limit
Typical
(e.g. 25°C ext./room ambient)
T
calc
== Max Temp. Limit
T
sense
< Max Temp. Limit
• Temperature-smart
AMD Turbo CORE kicks in
• Delivers higher boost
performance