<s>
Platform	B-Device
Environment	I-Device
Control	I-Device
Interface	I-Device
,	O
abbreviated	O
as	O
PECI	O
,	O
is	O
an	O
Intel	O
proprietary	B-Device
single	O
wire	O
serial	O
interface	O
that	O
provides	O
a	O
communication	O
channel	O
between	O
Intel	O
processors	O
and	O
chipset	B-Device
components	O
to	O
external	O
system	O
management	O
logic	O
and	O
thermal	O
monitoring	O
devices	O
.	O
</s>
<s>
Typically	O
in	O
server	O
platforms	O
,	O
CPUs	O
are	O
the	O
PECI	O
slaves	O
and	O
PCH	O
is	O
the	O
PECI	O
master	O
,	O
meanwhile	O
in	O
client	O
segment	O
,	O
CPU	O
is	O
usually	O
the	O
PECI	O
slave	O
and	O
EC/BMC	O
is	O
the	O
PECI	O
master	O
.	O
</s>
<s>
PECI	O
was	O
introduced	O
in	O
2006	O
with	O
the	O
Intel	O
Core	O
2	O
Duo	O
microprocessors	B-Architecture
.	O
</s>
<s>
Support	O
for	O
PECI	O
was	O
added	O
to	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
version	O
5.18	O
in	O
2022	O
.	O
</s>
<s>
The	O
PECI	O
bus	B-General_Concept
,	O
allowing	O
access	O
to	O
this	O
data	O
from	O
chipset	B-Device
components	O
,	O
is	O
a	O
proprietary	B-Device
single-wire	O
interface	O
with	O
a	O
variable	O
data	O
transfer	O
speed	O
(	O
from	O
2	O
kbit/s	O
to	O
2	O
Mbit/s	O
)	O
.	O
</s>
<s>
Since	O
the	O
value	O
reported	O
by	O
PECI	O
takes	O
into	O
account	O
internal	O
processor	O
information	O
about	O
safe	O
operating	O
temperatures	O
,	O
it	O
alleviates	O
the	O
need	O
for	O
the	O
BIOS	B-Operating_System
or	O
operating	B-General_Concept
system	I-General_Concept
to	O
make	O
potentially	O
incorrect	O
assumptions	O
about	O
this	O
limit	O
.	O
</s>
