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1Kernel driver coretemp
2======================
3
4Supported 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
14Author: Rudolf Marek
15
16Description
17-----------
18This driver permits reading the DTS (Digital Temperature Sensor) embedded
19inside Intel CPUs. This driver can read both the per-core and per-package
20temperature using the appropriate sensors. The per-package sensor is new;
21as of now, it is present only in the SandyBridge platform. The driver will
22show the temperature of all cores inside a package under a single device
23directory inside hwmon.
24
25Temperature is measured in degrees Celsius and measurement resolution is
261 degree C. Valid temperatures are from 0 to TjMax degrees C, because
27the actual value of temperature register is in fact a delta from TjMax.
28
29Temperature known as TjMax is the maximum junction temperature of processor,
30which depends on the CPU model. See table below. At this temperature, protection
31mechanism will perform actions to forcibly cool down the processor. Alarm
32may be raised, if the temperature grows enough (more than TjMax) to trigger
33the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
34
35All Sysfs entries are named with their core_id (represented here by 'X').
36tempX_input - Core temperature (in millidegrees Celsius).
37tempX_max - All cooling devices should be turned on (on Core2).
38tempX_crit - Maximum junction temperature (in millidegrees Celsius).
39tempX_crit_alarm - Set when Out-of-spec bit is set, never clears.
40 Correct CPU operation is no longer guaranteed.
41tempX_label - Contains string "Core X", where X is processor
42 number. For Package temp, this will be "Physical id Y",
43 where Y is the package number.
44
45The TjMax temperature is set to 85 degrees C if undocumented model specific
46register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
47(sometimes) documented in processor datasheet.
48
49Appendix A. Known TjMax lists (TBD):
50Some information comes from ark.intel.com
51
52Process Processor TjMax(C)
53
5432nm Core i3/i5/i7 Processors
55 i7 660UM/640/620, 640LM/620, 620M, 610E 105
56 i5 540UM/520/430, 540M/520/450/430 105
57 i3 330E, 370M/350/330 90 rPGA, 105 BGA
58 i3 330UM 105
59
6032nm Core i7 Extreme Processors
61 980X 100
62
6332nm Celeron Processors
64 U3400 105
65 P4505/P4500 90
66
6745nm Xeon Processors 5400 Quad-Core
68 X5492, X5482, X5472, X5470, X5460, X5450 85
69 E5472, E5462, E5450/40/30/20/10/05 85
70 L5408 95
71 L5430, L5420, L5410 70
72
7345nm Xeon Processors 5200 Dual-Core
74 X5282, X5272, X5270, X5260 90
75 E5240 90
76 E5205, E5220 70, 90
77 L5240 70
78 L5238, L5215 95
79
8045nm Atom Processors
81 D525/510/425/410 100
82 Z560/550/540/530P/530/520PT/520/515/510PT/510P 90
83 Z510/500 90
84 N475/470/455/450 100
85 N280/270 90
86 330/230 125
87
8845nm Core2 Processors
89 Solo ULV SU3500/3300 100
90 T9900/9800/9600/9550/9500/9400/9300/8300/8100 105
91 T6670/6500/6400 105
92 T6600 90
93 SU9600/9400/9300 105
94 SP9600/9400 105
95 SL9600/9400/9380/9300 105
96 P9700/9600/9500/8800/8700/8600/8400/7570 105
97 P7550/7450 90
98
9945nm Core2 Quad Processors
100 Q9100/9000 100
101
10245nm Core2 Extreme Processors
103 X9100/9000 105
104 QX9300 100
105
10645nm Core i3/i5/i7 Processors
107 i7 940XM/920 100
108 i7 840QM/820/740/720 100
109
11045nm Celeron Processors
111 SU2300 100
112 900 105
113
11465nm Core2 Duo Processors
115 Solo U2200, U2100 100
116 U7700/7600/7500 100
117 T7800/7700/7600/7500/7400/7300/7250/7200/7100 100
118 T5870/5670/5600/5550/5500/5470/5450/5300/5270 100
119 T5250 100
120 T5800/5750/5200 85
121 L7700/7500/7400/7300/7200 100
122
12365nm Core2 Extreme Processors
124 X7900/7800 100
125
12665nm Core Duo Processors
127 U2500/2400 100
128 T2700/2600/2450/2400/2350/2300E/2300/2250/2050 100
129 L2500/2400/2300 100
130
13165nm Core Solo Processors
132 U1500/1400/1300 100
133 T1400/1350/1300/1250 100
134
13565nm Xeon Processors 5000 Quad-Core
136 X5000 90-95
137 E5000 80
138 L5000 70
139 L5318 95
140
14165nm Xeon Processors 5000 Dual-Core
142 5080, 5063, 5060, 5050, 5030 80-90
143 5160, 5150, 5148, 5140, 5130, 5120, 5110 80
144 L5138 100
145
14665nm Celeron Processors
147 T1700/1600 100
148 560/550/540/530 100