Documentation/hwmon/coretemp

   1 Kernel driver coretemp
   2 ======================
   3
   4 Supported chips:
   5   * All Intel Core family
   6     Prefix: 'coretemp'
   7     CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm),
   8                               0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm),
   9                               0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield)
  10     Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
  11                Volume 3A: System Programming Guide
  12                http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
  13
  14 Author: Rudolf Marek
  15
  16 Description
  17 -----------
  18
  19 This driver permits reading temperature sensor embedded inside Intel Core CPU.
  20 Temperature is measured in degrees Celsius and measurement resolution is
  21 1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
  22 the actual value of temperature register is in fact a delta from TjMax.
  23
  24 Temperature known as TjMax is the maximum junction temperature of processor,
  25 which depends on the CPU model. See table below. At this temperature, protection
  26 mechanism will perform actions to forcibly cool down the processor. Alarm
  27 may be raised, if the temperature grows enough (more than TjMax) to trigger
  28 the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
  29
  30 temp1_input      - Core temperature (in millidegrees Celsius).
  31 temp1_max        - All cooling devices should be turned on (on Core2).
  32 temp1_crit       - Maximum junction temperature (in millidegrees Celsius).
  33 temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
  34                    Correct CPU operation is no longer guaranteed.
  35 temp1_label      - Contains string "Core X", where X is processor
  36                    number.
  37
  38 The TjMax temperature is set to 85 degrees C if undocumented model specific
  39 register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
  40 (sometimes) documented in processor datasheet.
  41
  42 Appendix A. Known TjMax lists (TBD):
  43 Some information comes from ark.intel.com
  44
  45 Process         Processor                                       TjMax(C)
  46
  47 32nm            Core i3/i5/i7 Processors
  48                 i7 660UM/640/620, 640LM/620, 620M, 610E         105
  49                 i5 540UM/520/430, 540M/520/450/430              105
  50                 i3 330E, 370M/350/330                           90 rPGA, 105 BGA
  51                 i3 330UM                                        105
  52
  53 32nm            Core i7 Extreme Processors
  54                 980X                                            100
  55
  56 32nm            Celeron Processors
  57                 U3400                                           105
  58                 P4505/P4500                                     90
  59
  60 45nm            Xeon Processors 5400 Quad-Core
  61                 X5492, X5482, X5472, X5470, X5460, X5450        85
  62                 E5472, E5462, E5450/40/30/20/10/05              85
  63                 L5408                                           95
  64                 L5430, L5420, L5410                             70
  65
  66 45nm            Xeon Processors 5200 Dual-Core
  67                 X5282, X5272, X5270, X5260                      90
  68                 E5240                                           90
  69                 E5205, E5220                                    70, 90
  70                 L5240                                           70
  71                 L5238, L5215                                    95
  72
  73 45nm            Atom Processors
  74                 D525/510/425/410                                100
  75                 Z560/550/540/530P/530/520PT/520/515/510PT/510P  90
  76                 Z510/500                                        90
  77                 N475/470/455/450                                100
  78                 N280/270                                        90
  79                 330/230                                         125
  80
  81 45nm            Core2 Processors
  82                 Solo ULV SU3500/3300                            100
  83                 T9900/9800/9600/9550/9500/9400/9300/8300/8100   105
  84                 T6670/6500/6400                                 105
  85                 T6600                                           90
  86                 SU9600/9400/9300                                105
  87                 SP9600/9400                                     105
  88                 SL9600/9400/9380/9300                           105
  89                 P9700/9600/9500/8800/8700/8600/8400/7570        105
  90                 P7550/7450                                      90
  91
  92 45nm            Core2 Quad Processors
  93                 Q9100/9000                                      100
  94
  95 45nm            Core2 Extreme Processors
  96                 X9100/9000                                      105
  97                 QX9300                                          100
  98
  99 45nm            Core i3/i5/i7 Processors
 100                 i7 940XM/920                                    100
 101                 i7 840QM/820/740/720                            100
 102
 103 45nm            Celeron Processors
 104                 SU2300                                          100
 105                 900                                             105
 106
 107 65nm            Core2 Duo Processors
 108                 Solo U2200, U2100                               100
 109                 U7700/7600/7500                                 100
 110                 T7800/7700/7600/7500/7400/7300/7250/7200/7100   100
 111                 T5870/5670/5600/5550/5500/5470/5450/5300/5270   100
 112                 T5250                                           100
 113                 T5800/5750/5200                                 85
 114                 L7700/7500/7400/7300/7200                       100
 115
 116 65nm            Core2 Extreme Processors
 117                 X7900/7800                                      100
 118
 119 65nm            Core Duo Processors
 120                 U2500/2400                                      100
 121                 T2700/2600/2450/2400/2350/2300E/2300/2250/2050  100
 122                 L2500/2400/2300                                 100
 123
 124 65nm            Core Solo Processors
 125                 U1500/1400/1300                                 100
 126                 T1400/1350/1300/1250                            100
 127
 128 65nm            Xeon Processors 5000 Quad-Core
 129                 X5000                                           90-95
 130                 E5000                                           80
 131                 L5000                                           70
 132                 L5318                                           95
 133
 134 65nm            Xeon Processors 5000 Dual-Core
 135                 5080, 5063, 5060, 5050, 5030                    80-90
 136                 5160, 5150, 5148, 5140, 5130, 5120, 5110        80
 137                 L5138                                           100
 138
 139 65nm            Celeron Processors
 140                 T1700/1600                                      100
 141                 560/550/540/530                                 100