AMD Socket AM2+ Quad Core Processor 790GX - Manual (Page 15)

10
2-4 Install Memory
This motherboard provides four 240-pin DDR2 DUAL INLINE MEMORY MODULES
(DIMM) socket for DDR2 memory expansion available from minimum memory volume of
128MB to maximum memory volume of 8GB DDRII SDRAM.
Valid Memory Configurations
Bank 240-Pin DIMM PCS Total Memory
Bank 0, 1 (DIMM1) DDR2 667/DDR2 800/DDR2 1066 X1 128MB
∼2GB
Bank 2, 3 (DIMM2) DDR2 667/DDR2 800/DDR2 1066 X1 128MB
∼2GB
Bank 4, 5 (DIMM3) DDR2 667/DDR2 800/DDR2 1066 X1 128MB
∼2GB
Bank 6, 7 (DIMM3) DDR2 667/DDR2 800/DDR2 1066 X1 128MB
∼2GB
Total System Memory (Max 8GB) 4 128MB
∼8GB
Dual channel Limited!
1. Dual channel function only supports when 2 DIMM Modules plug in either both DIMM1 &
DIMM2or DIMM3 &DIMM4, or four DIMM Modules plug in DIMM1~DIMM4.
2. DIMM1 & DIMM2, or DIMM3& DIMM4 must be the same type, same size, same frequency
for dual channel function.
Install DDR SDRAM modules to your motherboard is not difficult, you can refer to figure
below to see how to install a 240-Pin DDRII533/DDR2 667/DDR2 800/DDR2
1066SDRAM module.
DI
M
M
2 (
BANK2
+B
ANK3
)
DI
M
M
1 (
BANK0+BANK1)
DI
M
M
4 (
BANK6+BANK7)
DI
M
M
3 (
BAN
K4+B
AN
K5)
DIMM1 & DIMM2: Dual Channel 1
DIMM3 & DIMM4: Dual Channel 2
Graph 2-4
NOTE! When you install DIMM module fully into the DIMM socket the eject tab should be locked
into the DIMM module very firmly and fit into its indention on both sides.
WARNING! For the DDR SDRAM CLOCK is set at 400MHz, use only DDR2 800- compliant DDR2
Modules. When this motherboard operate at 400Mhz, most system will not even boot if
non-compliant modules are used because of the strict timing issues, if your DDR Modules
are not DDR2 800-compliant, set the SDRAM clock to 200MHz to ensure system
stability.