ASRock X38TurboTwins-WiFi User Manual - Page 19

and DDR3_B2.

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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 in the set of yellow slots (DDRII_1 and DDRII_2), in the set of green slots (DDR3_A1 and DDR3_B1), or in the set of pink slots (DDR3_A2 and DDR3_B2). 2. If only one memory module or three memory modules are installed in DDR3 DIMM slots on this motherboard, it is unable to activate the Dual Channel Memory Technology. If only one memory module is installed in DDR2 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 DDR3_A1 and DDR3_B2, it is unable to activate the Dual Channel Memory Technology. 4. It is not allowed to install a DDR3 memory module into DDR2 slot or install a DDR2 memory module into DDR3 slot; otherwise, this motherboard and DIMM may be damaged. 5. DDR2 and DDR3 memory modules cannot be installed on this motherboard at the same time. 6. To have the best performance with DDR3 1600 XMP memory modules, it is suggested to install one memory module on each channel. For example, install them in the set of green slots (DDR3_A1 and DDR3_B1) or in the set of pink slots (DDR3_A2 and DDR3_B2). 19

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1.
If you want to install two memory modules, for optimal compatibil-
ity and reliability, it is recommended to install them in the slots of
the same color. In other words, install them in the set of yellow
slots (DDRII_1 and DDRII_2), in the set of green slots (DDR3_A1
and DDR3_B1), or in the set of pink slots (DDR3_A2 and
DDR3_B2).
2.
If only one memory module or three memory modules are in-
stalled in DDR3 DIMM slots on this motherboard, it is unable to
activate the Dual Channel Memory Technology. If only one memory
module is installed in DDR2 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
DDR3_A1 and DDR3_B2, it is unable to activate the Dual Channel
Memory Technology.
4.
It is not allowed to install a DDR3 memory module into DDR2 slot
or install a DDR2 memory module into DDR3 slot; otherwise, this
motherboard and DIMM may be damaged.
5.
DDR2 and DDR3 memory modules cannot be installed on this
motherboard at the same time.
6.
To have the best performance with DDR3 1600 XMP memory
modules, it is suggested to install one memory module on each
channel. For example, install them in the set of green slots
(DDR3_A1 and DDR3_B1) or in the set of pink slots (DDR3_A2
and DDR3_B2).