2-6
X7QC3/X7QCE User's Manual
Possible System Memory Allocation & Availability
System Device
Size
Physical Memory
Remaining (-Available)
(4 GB Total System Memory)
Firmware Hub fl ash memory
(System BIOS)
1 MB
3.99
Local APIC
4 KB
3.99
Area Reserved for the chipset
2 MB
3.99
I/O APIC (4 Kbytes)
4 KB
3.99
PCI Enumeration Area 1
256 MB
3.76
PCI Express (256 MB)
256 MB
3.51
PCI Enumeration Area 2 (if
needed) -Aligned on 256-MB
boundary-
512 MB
3.01
VGA Memory
16 MB
2.85
TSEG
1 MB
2.84
Memory available to OS and
other applications
2.84
3.
Due to memory allocation to system devices, memory remaining available for
operational use will be reduced when 4 GB of RAM is used. The reduction in
memory availability is disproportional. (Refer to the Memory Availability Table below
for details.)
2. For memory update granularity: Two DIMMs are required in non-mirrored mode
(one pair on a selected branch), and four DIMMs are required in mirrored mode
(on both branches).
Memory Configuration Table
Branch 0
Branch 1
Channel 0 (Bank 0)
Channel 1 (Bank 1)
Channel 2 (Bank 2)
Channel 3 (Bank 3)
2
DIMMs
A1
---
---
---
---
---
B1
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
4
DIMMs
A1
---
---
---
---
---
B1
---
---
---
---
---
C
1
---
---
---
---
---
D1
---
---
---
---
---
8
DIMMs
A1
A2
---
---
---
---
B1
B2
---
---
---
---
C
1
C
2
---
---
---
---
D1
D2
---
---
---
---
12
DIMMs
A1
A2
A3
---
---
---
B1
B2
B3
---
---
---
C
1
C
2
C
3
---
---
---
D1
D2
D3
---
---
---
16
DIMMs
A1
A2
A3
A4
---
---
B1
B2
B3
B4
---
---
C
1
C
2
C
3
C
4
---
---
D1
D2
D3
D4
---
---
1
8
DIMMs
A1
A2
A3
A4
A5
---
B1
B2
B3
B4
B5
---
C
1
C
2
C
3
C
4
C
5
---
D1
D2
D3
D4
D5
---
24
DIMMs
A1
A2
A3
A4
A5
A6 B1
B2
B3
B4
B5
B6
C
1
C
2
C
3
C
4
C
5
C
6
D1
D2
D3
D4
D5
D6
*Notes
:
i
. “
---
“
indi
c
a
te
s
DIMM
sl
ot
s
n
ot pop
ula
te
d
.
ii
.
B
ot
h
FDB
DDR
533MHz
and
66
8
MHz
ar
e
su
ppo
r
te
d
;
h
oweve
r
, p
l
e
as
e
ins
e
r
t memo
r
y mo
dul
e
s
of t
h
e
sa
me type
and
sa
me
s
pee
d
o
n
a
mot
h
e
r
bo
ard
,
s
t
ar
t
in
g w
i
t
h
S
l
ot
A1
.
iii
.
Ins
t
allin
g p
air(s)
of memo
r
y mo
dul
e
s
of t
h
e
sa
me type
and
t
h
e
sa
me
s
pee
d
w
ill
r
e
sul
t
in
In
te
rl
e
a
ve
d
memo
r
y. S
in
g
l
e
-
w
a
y,
T
wo
-
w
a
y
In
te
rl
e
a
ve
d
and
fo
ur-
w
a
y
In
te
rl
e
a
ve
d
memo
r
y
s
c
h
eme
s
ar
e
su
ppo
r
te
d
.
F
o
r
be
s
t pe
r
fo
r
m
an
ce, p
l
e
as
e
ins
t
all
p
airs
of memo
r
y
mo
dul
e
s
in
bot
h
Bran
c
h
0
and
Bran
c
h
1
, w
hi
c
h
w
ill
r
e
sul
t
in
fo
ur-
w
a
y
in
te
rl
e
a
ve
d
memo
r
y
s
c
h
eme.
i
v.
F
o
r
memo
r
y to wo
r
k p
r
ope
rl
y, p
l
e
as
e fo
ll
ow t
h
e
r
e
s
t
ri
ct
i
o
ns
lis
te
d
in
t
h
e t
a
b
l
e.
Summary of Contents for Supero X7QC3
Page 1: ...X7QC3 USER S MANUAL Revision 1 0 SUPER X7QCE...
Page 20: ...1 14 X7QC3 X7QCE User s Manual Notes...
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