Intel 2955U CL8064701523900 Data Sheet
Product codes
CL8064701523900
Note
Definition
1
The TDPs given are not the maximum power the processor can generate. Analysis indicates that real applications
are unlikely to cause the processor to consume the theoretical maximum power dissipation for sustained periods of
time.
2
TDP workload may consist of a combination of processor-core intensive and graphics-core intensive applications.
3
The thermal solution needs to ensure that the processor temperature does not exceed the maximum junction
temperature (Tj
MAX
) limit, as measured by the DTS and the critical temperature bit.
4
The processor junction temperature is monitored by Digital Temperature Sensors (DTS). For DTS accuracy, refer to
on page 68.
5
Digital Thermal Sensor (DTS) based fan speed control is required to achieve optimal thermal performance. Intel
recommends full cooling capability well before the DTS reading reaches Tj
MAX
. An example of this is Tj
MAX
– 10 ºC.
6
The idle power specifications are not 100% tested. These power specifications are determined by the
characterization at higher temperatures and extrapolating the values for the junction temperature indicated.
7
At Tj of Tj
MAX
8
At Tj of 50 ºC
9
At Tj of 35 ºC
10
Can be modified at runtime by MSR writes, with MMIO and with PECI commands.
11
'Turbo Time Parameter' is a mathematical parameter (unit in seconds) that controls the processor turbo algorithm
using a moving average of energy usage. Do not set the Turbo Time Parameter to a value less than 0.1 seconds.
Refer to
on page 61 for further information.
12
Shown limit is a time averaged power, based upon the Turbo Time Parameter. Absolute product power may exceed
the set limits for short durations or under virus or uncharacterized workloads.
13
on page 60. If the power value and/or 'Turbo Time Parameter' is changed during runtime, it may take a
short period of time (approximately 3 to 5 times the 'Turbo Time Parameter') for the algorithm to settle at the new
control limits.
14
This is a hardware default setting and not a behavioral characteristic of the part.
15
For controllable turbo workloads, limit may be exceeded for up to 10 ms.
16
Refer to
on page 62 for the definitions of 'TDP-Nominal', 'TDP-Up', 'TDP-Down'.
17
LPM power level is an opportunistic power and is not a guaranteed value as usages and implementations may vary.
18
Power limits may vary depending on if the product supports the 'TDP-up' and/or 'TDP-down' modes. Default power
limits can be found in the PKG_PWR_SKU MSR (614h).
19
May vary based on SKU.
20
cTDP down power is based on GT2 equivalent graphics configuration. cTDP down does not decrease the number of
active Processor Graphics EUs, but relies on Power Budget Management (PL1) to achieve the specified power level.
21
Hardware default values might be overridden by the BIOS.
Table 22.
Thermal Design Power (TDP) Specifications
Segment
State
Processor Core
Frequency
Processor
Graphics Core
Frequency
Thermal Design
Power
Units
Notes
U-Processor
(Dual Core)
28W
GT3
28W
GT3
TDP-Nominal /
HFM
2.0 GHz up to
2.8 GHz
200 MHz up to
1200 MHz
28
W
1, 2, 7,
16, 17,
18
TDP-Down /
LFM
800 MHz
23
LPM
800 MHz
200 MHz
22.5
continued...
Thermal Management—Processors
Mobile 4th Generation Intel
®
Core
™
Processor Family, Mobile Intel
®
Pentium
®
Processor Family, and Mobile Intel
®
Celeron
®
Processor Family
July 2014
Datasheet – Volume 1 of 2
Order No.: 329001-007
63