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2.4.2
Memory configurations
You may install 512 MB, 1 GB, 2 GB and 4 GB unbuffered ECC and non-ECC DDR3 DIMMs into the DIMM
sockets.
•
You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel configuration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
•
It is recommended to install the memory modules from the orange slots for better
overclocking capability.
•
Always install DIMMs with the same CAS latency. For optimum compatibility, it is
recommended that you obtain memory modules from the same vendor.
•
Due to the memory address limitation on 32-bit Windows OS, when you install 4GB or
more memory on the motherboard, the actual usable memory for the OS can be about
3GB or less. For effective use of memory, we recommend that you install a 64-bit
Windows OS when having 4GB or more memory installed on the motherboard.
•
This motherboard does not support DIMMs made up of 256 megabit (Mb) chips or
less.
•
The default memory operation frequency is dependent on its SPD. Under the default
state, some memory modules for overclocking may operate at a lower frequency than
the vendor-marked value. To operate at the vendor-marked or at a higher frequency,
see section 3.6 Advanced menu for manual memory frequency adjustment.
•
For system stability, use a more efficient memory cooling system to support a full
memory load (4 DIMMs) or overclocking condition.
ASUS M4A78T-E
2-11
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