ASROCK M3A790GXH/128M User Manual download pdf (Page 18)

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2.3 Installation of Memory Modules (DIMM)2.3 Installation of Memory Modules (DIMM)

2.3 Installation of Memory Modules (DIMM)

This motherboard provides four 240-pin DDR3 (Double Data Rate 3) DIMM slots,

and supports Dual Channel Memory Technology. For dual channel configuration,

you always need to install identical (the same brand, speed, size and chip-type)

DDR3 DIMM pair in the slots of the same color. In other words, you have to install

identical DDR3 DIMM pair in Dual Channel A (DDR3_A1 and DDR3_B1; Blue

slots; see p.14 No.7) or identical DDR3 DIMM pair in Dual Channel B (DDR3_A2

and DDR3_B2; White slots; see p.14 No.8), so that Dual Channel Memory Technol-

ogy can be activated. This motherboard also allows you to install four DDR3 DIMMs

for dual channel configuration, and please install identical DDR3 DIMMs in all four

slots. You may refer to the Dual Channel Memory Configuration Table below.

Dual Channel Memory Configurations

DDR3_A1 DDR3_B1 DDR3_A2 DDR3_B2

(Blue Slot) (Blue Slot) (White Slot) (White Slot)

(1) Populated Populated - -

(2) - - Populated Populated

(3)* Populated Populated Populated Populated

* For the configuration (3), please install identical DDR3 DIMMs in all four slots.

1. If you want to install two memory modules, for optimal compatibility

and reliability, it is recommended to install them in the slots of the

same color. In other words, install them either in the set of blue

slots (DDR3_A1 and DDR3_B1), or in the set of white slots

(DDR3_A2 and DDR3_B2).

2. If only one memory module or three memory modules are installed

in the DDR3 DIMM slots on this motherboard, it is unable to acti-

vate the Dual Channel Memory Technology.

3. If a pair of memory modules is NOT installed in the same Dual

Channel, for example, installing a pair of memory modules in

DDR3_A1 and DDR3_A2, it is unable to activate the Dual Channel

Memory Technology .

4. It is not allowed to install a DDR or DDR2 memory module into

DDR3 slot; otherwise, this motherboard and DIMM may be

damaged.

5. If you adopt DDR3 1600 memory modules on this motherboard, it

is recommended to install them on DDR3_A2 and DDR3_B2 slots.

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ASROCK M3A790GXH/128M User Manual Page 18