ASRock Z77 Extreme4 [20/79] Installation of memory modules dimm

2.5 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 cong-

uration, you always need to install identical (the same brand, speed, size and

chip-type) DDR3 DIMM pair in the slots: You have to install identical DDR3

DIMMs in Dual Channel A (DDR3_A1 and DDR3_B1; Black slots; see p.13

No. 6) or identical DDR3 DIMMs in Dual Channel B (DDR3_A2 and DDR3_

B2; Black slots; see p.13 No. 7), so that Dual Channel Memory Technology can

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

for dual channel conguration, please install identical DDR3 DIMMs in all four

slots. You may refer to the Dual Channel Memory Conguration Table below.

Dual Channel Memory Conguration

DDR3_A1 DDR3_A2 DDR3_B1 DDR3_B2

(Black Slot) (Black Slot) (Black Slot) (Black Slot)

(1) Populated - Populated -

(2) - Populated - Populated

(3)* Populated Populated Populated Populated

For conguration (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: DDR3_

A1 and DDR3_B1, or 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 activate

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 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 dam-

aged.

5. Some DDR3 1GB double-sided DIMMs with 16 chips may not work

on this motherboard. It is not recommended to install them on this

motherboard.

6. For optimal compatibility and stability while overclocking memory

frequency, it is recommended to install one memory module on

DDR3_B2 slot or two memory modules on DDR3_A2 and DDR3_

B2 slots.