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Based on kernel version 3.2. Page generated on 2012-01-05 23:28 EST.

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	This driver permits reading the DTS (Digital Temperature Sensor) embedded
19	inside Intel CPUs. This driver can read both the per-core and per-package
20	temperature using the appropriate sensors. The per-package sensor is new;
21	as of now, it is present only in the SandyBridge platform. The driver will
22	show the temperature of all cores inside a package under a single device
23	directory inside hwmon.
24	
25	Temperature is measured in degrees Celsius and measurement resolution is
26	1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
27	the actual value of temperature register is in fact a delta from TjMax.
28	
29	Temperature known as TjMax is the maximum junction temperature of processor,
30	which depends on the CPU model. See table below. At this temperature, protection
31	mechanism will perform actions to forcibly cool down the processor. Alarm
32	may be raised, if the temperature grows enough (more than TjMax) to trigger
33	the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
34	
35	All Sysfs entries are named with their core_id (represented here by 'X').
36	tempX_input	 - Core temperature (in millidegrees Celsius).
37	tempX_max	 - All cooling devices should be turned on (on Core2).
38	tempX_crit	 - Maximum junction temperature (in millidegrees Celsius).
39	tempX_crit_alarm - Set when Out-of-spec bit is set, never clears.
40			   Correct CPU operation is no longer guaranteed.
41	tempX_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	
45	On CPU models which support it, TjMax is read from a model-specific register.
46	On other models, it is set to an arbitrary value based on weak heuristics.
47	If these heuristics don't work for you, you can pass the correct TjMax value
48	as a module parameter (tjmax).
49	
50	Appendix A. Known TjMax lists (TBD):
51	Some information comes from ark.intel.com
52	
53	Process		Processor					TjMax(C)
54	
55	32nm		Core i3/i5/i7 Processors
56			i7 660UM/640/620, 640LM/620, 620M, 610E		105
57			i5 540UM/520/430, 540M/520/450/430		105
58			i3 330E, 370M/350/330				90 rPGA, 105 BGA
59			i3 330UM					105
60	
61	32nm		Core i7 Extreme Processors
62			980X						100
63	
64	32nm		Celeron Processors
65			U3400						105
66			P4505/P4500 					90
67	
68	45nm		Xeon Processors 5400 Quad-Core
69			X5492, X5482, X5472, X5470, X5460, X5450	85
70			E5472, E5462, E5450/40/30/20/10/05		85
71			L5408						95
72			L5430, L5420, L5410				70
73	
74	45nm		Xeon Processors 5200 Dual-Core
75			X5282, X5272, X5270, X5260			90
76			E5240						90
77			E5205, E5220					70, 90
78			L5240						70
79			L5238, L5215					95
80	
81	45nm		Atom Processors
82			D525/510/425/410				100
83			Z560/550/540/530P/530/520PT/520/515/510PT/510P	90
84			Z510/500					90
85			N475/470/455/450				100
86			N280/270					90
87			330/230						125
88	
89	45nm		Core2 Processors
90			Solo ULV SU3500/3300				100
91			T9900/9800/9600/9550/9500/9400/9300/8300/8100	105
92			T6670/6500/6400					105
93			T6600						90
94			SU9600/9400/9300				105
95			SP9600/9400					105
96			SL9600/9400/9380/9300				105
97			P9700/9600/9500/8800/8700/8600/8400/7570	105
98			P7550/7450					90
99	
100	45nm		Core2 Quad Processors
101			Q9100/9000					100
102	
103	45nm		Core2 Extreme Processors
104			X9100/9000					105
105			QX9300						100
106	
107	45nm		Core i3/i5/i7 Processors
108			i7 940XM/920					100
109			i7 840QM/820/740/720				100
110	
111	45nm		Celeron Processors
112			SU2300						100
113			900 						105
114	
115	65nm		Core2 Duo Processors
116			Solo U2200, U2100				100
117			U7700/7600/7500					100
118			T7800/7700/7600/7500/7400/7300/7250/7200/7100	100
119			T5870/5670/5600/5550/5500/5470/5450/5300/5270	100
120			T5250						100
121			T5800/5750/5200					85
122			L7700/7500/7400/7300/7200			100
123	
124	65nm		Core2 Extreme Processors
125			X7900/7800					100
126	
127	65nm		Core Duo Processors
128			U2500/2400					100
129			T2700/2600/2450/2400/2350/2300E/2300/2250/2050	100
130			L2500/2400/2300					100
131	
132	65nm		Core Solo Processors
133			U1500/1400/1300					100
134			T1400/1350/1300/1250				100
135	
136	65nm		Xeon Processors 5000 Quad-Core
137			X5000						90-95
138			E5000						80
139			L5000						70
140			L5318						95
141	
142	65nm		Xeon Processors 5000 Dual-Core
143			5080, 5063, 5060, 5050, 5030			80-90
144			5160, 5150, 5148, 5140, 5130, 5120, 5110	80
145			L5138						100
146	
147	65nm		Celeron Processors
148			T1700/1600					100
149			560/550/540/530					100
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