AMD Richland

13 AMD “RICHLAND” APU | HOT CHIPS 25 | PRAVEEN DONGARA | AUGUST 2013
USING TEMPERATURE SENSORS
FACTORING IN UNDER/OVER-REPORTING ERRORS
X
o
C
Sensor’s potential
under-reporting error
Y
o
C
Sensor’s potential
over-reporting error
Temp. margin that
temperature-smart
AMD Turbo CORE can
leverage
= 10
o
C – X
o
C – Y
o
C
10
o
C
25°C
TYPICAL Ambient
35°C
MAX SPEC Ambient
IF
Ambient
Temp.
90°C
100°C
THEN
Die Sensor
Temp.
• After AMD Turbo CORE control loops
reach steady state
• Die temp shown before application of
temperature-smart AMD Turbo CORE
Over-reporting error needs to be accounted for
to allow deterministic higher performance at typical
thermal environments
Under-reporting error needs to be accounted for
to ensure max temp. reliability limit is not exceeded
The temperature values above
• are for illustrative purposes only
• may not reflect actual product implementation