690
Northbridge
FIFO
Read
/
Write
Pointer
Overlap
May
Cause
Hang
or
Protocol
Error
Machine
Check
Description
A
command
or
data
transfer
may
be
lost
when
the
write
pointer
overlaps
the
read
pointer
of
a
synchronization
FIFO
between
the
processor
core
and
the
northbridge
.
Potential
Effect
on
System
Unpredictable
system
behavior
,
likely
leading
to
a
hang
of
both
cores
of
a
compute-unit
.
The
processor
may
also
report
a
probe
filter
protocol
machine
check
exception
identified
by
the
extended
error
code
in
the
NB
Machine
Check
Status
Register
(
MC
4_
STATUS
[
ErrorCodeExt
],
MSR
0000_0411[20:16] = 01011
b
).
Suggested
Workaround
BIOS
should
set
D
18
F
3
xDC
[14:12] = 101
b
(
Clock
Power
/
Timing
Control
2 [
NbsynPtrAdj
]).
A
warm
reset
is
required
before
this
setting
takes
effect
.
Fix
Planned
No
fix
planned
Revision
Guide
for
AMD
Family
15
h
Models
00
h-
0
Fh
Processors
48063
Rev
. 3.18
October
2012
64
Product
Errata