Western Digital WD 2TB 3D NAND SATA III 2.5" Internal SSD (Retail) - Manual (Page 19)

6 Thermal Throttling
To protect the integrity of the data and prevent excessive heat dissipation, the
X600 3D NAND SATA SSD uses an integrated thermal sensor in the NAND to monitor
its critical component temperature. If the sensor temperature rises above the
allowable limit, system performance is throttled until the temperature decreases to
an acceptable level. The X600 returns to full performance when the temperature
returns to a normal range. This performance throttling technique acts as a safety
measure.
The X600 3D NAND SATA SSD reads temperature from the integrated thermal
sensor every one second. The device then autonomously decides which throttling
level is required and reduces performance appropriate to the state.
The following table details the thermal throttling behavior for both the X600 3D
NAND SATA SSD 2.5”/7mm cased and M.2 2280 form factors.
Thermal Band ≤74°C ≥75°C ≥83°C ≥87°C
Thermal Throttle
State Normal Light (up to) Heavy (up to) Emergency
Shutdown
250GB Read Refer to
Performance
Section 250 150 No host I/O
available in this
state
250GB Write Refer to
Performance
Section 60 20 No host I/O
available in this
state
500GB Read Refer to
Performance
Section 250 140 No host I/O
available in this
state
500GB Write Refer to
Performance
Section 60 20 No host I/O
available in this
state
1TB Read Refer to
Performance
Section 250 140 No host I/O
available in this
state
1TB Write Refer to
Performance
Section 60 20 No host I/O
available in this
state
2TB Read Refer to
Performance
Section 240 150 No host I/O
available in this
state
2TB Write Refer to
Performance
Section 70 20 No host I/O
available in this
state
Light Thermal Throttle performance is defined has performance defined as 10% of
Normal. Heavy Thermal Throttle has performance is defined as 650% of Normal.
Emergency Shutdown is activated if device temperature is equal to or higher than
87°C for 20 seconds.
Thermal Throttling
WD Blue 3D NAND SATA SSD
User Manual
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