ASROCK 939A8X-M Guide D'installation Rapide page 8

2.2 Installation of Memory Modules (DIMM) 2.2 Installation of Memory Modules (DIMM) 2.2 Installation of Memory Modules (DIMM)
2.2 Installation of Memory Modules (DIMM) 2.2 Installation of Memory Modules (DIMM)
939A8X-M motherboard provides four 184-pin DDR (Double Data Rate) 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) DDR
DIMM pair in the slots of the same color. In other words, you have to install identical
DDR DIMM pair in Dual Channel A (DDR1 and DDR2; Blue slots; see p.2 No. 6) or
identical DDR DIMM pair in Dual Channel B (DDR3 and DDR4; Black slots; see p.2
No. 7), so that Dual Channel Memory Technology can be activated. This motherboard
also allows you to install four DDR DIMMs for dual channel configuration, and please
install identical DDR DIMMs in all four slots. You may refer to the Dual Channel
Memory Configuration Table below.
Dual Channel Memory Configurations
DDR1
(Blue Slot)
(1) Populated
(2) -
(3)* Populated
*
For the configuration (3), please install identical DDR DIMMs in all four slots.
*
It is recommended to install DDR3 and DDR4 (black slots) first. Then to install
in DDR1 and DDR2. (That is, to populate DDR DIMM from the far side of CPU
towards to the near side of CPU.)
1. If you want to install two different memory modules, for optimal
compatibility and reliability, it is recommended to install them in the
slots of different color. In other words, install them either in DDR1
and DDR3.
2. If only one memory module or three memory modules are installed
in the DDR DIMM slots on this motherboard, it is unable to activate
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 DDR1
and DDR3, it is unable to activate the Dual Channel Memory Tech-
nology .
8 8 8 8 8
DDR2 DDR3
(Blue Slot) (Black Slot)
Populated
- Populated
Populated Populated
ASRock 939A8X-M Motherboard
DDR4
(Black Slot)
- -
Populated
Populated