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4.2 Processor Core Power Management......................................................................... 50
4.2.1 Enhanced Intel
®
SpeedStep
®
Technology Key Features..................................50
4.2.2 Low-Power Idle States...............................................................................51
4.2.3 Requesting Low-Power Idle States...............................................................52
4.2.4 Core C-State Rules....................................................................................53
4.2.5 Package C-States......................................................................................54
4.3 Integrated Memory Controller (IMC) Power Management............................................58
4.3.1 Disabling Unused System Memory Outputs...................................................58
4.3.2 DRAM Power Management and Initialization..................................................58
4.3.2.1 Initialization Role of CKE................................................................59
4.3.2.2 Conditional Self-Refresh.................................................................60
4.3.2.3 Dynamic Power-Down....................................................................60
4.3.2.4 DRAM I/O Power Management........................................................ 60
4.3.3 DRAM Running Average Power Limitation (RAPL) .........................................60
4.3.4 DDR Electrical Power Gating (EPG).............................................................. 61
4.4 PCI Express* Power Management............................................................................61
4.5 Direct Media Interface (DMI) Power Management......................................................61
4.6 Graphics Power Management..................................................................................61
4.6.1 Intel
®
Rapid Memory Power Management (Intel
®
RMPM)................................61
4.6.2 Graphics Render C-State............................................................................61
4.6.3 Intel
®
Graphics Dynamic Frequency............................................................ 61
5.0 Thermal Management................................................................................................. 63
5.1 Thermal Metrology................................................................................................64
5.2 Fan Speed Control Scheme with Digital Thermal Sensor (DTS) 1.1.............................. 64
5.3 Fan Speed Control Scheme with Digital Thermal Sensor (DTS) 2.0.............................. 66
5.4 Intel
®
Xeon
®
Processor E3-1200 v3 Product Family Thermal Specifications...................67
5.5 Processor Temperature..........................................................................................69
5.6 Adaptive Thermal Monitor...................................................................................... 69
5.7 THERMTRIP# Signal..............................................................................................72
5.8 Digital Thermal Sensor.......................................................................................... 73
5.8.1 Digital Thermal Sensor Accuracy (Taccuracy)................................................73
5.9 Intel
®
Turbo Boost Technology Thermal Considerations..............................................74
5.9.1 Intel
®
Turbo Boost Technology Power Control and Reporting.......................... 74
5.9.2 Package Power Control.............................................................................. 75
5.9.3 Turbo Time Parameter...............................................................................75
6.0 Signal Description.......................................................................................................77
6.1 System Memory Interface Signals........................................................................... 77
6.2 Memory Reference and Compensation..................................................................... 79
6.3 Reset and Miscellaneous Signals............................................................................. 80
6.4 PCI Express*-Based Interface Signals......................................................................81
6.5 Display Interface Signals....................................................................................... 81
6.6 Direct Media Interface (DMI).................................................................................. 82
6.7 Phase Locked Loop (PLL) Signals.............................................................................82
6.8 Testability Signals.................................................................................................82
6.9 Error and Thermal Protection Signals.......................................................................83
6.10 Power Sequencing...............................................................................................84
6.11 Processor Power Signals.......................................................................................84
6.12 Sense Pins......................................................................................................... 84
6.13 Ground and Non-Critical to Function (NCTF) Signals.................................................85
Processor—Contents
Intel
®
Xeon
®
Processor E3-1200 v3 Product Family
Datasheet – Volume 1 of 2 June 2013
4 Order No.: 328907-001