Asus P6X58-E WS User Guide - Page 36

Memory configurations, You may install 1GB, 2GB and 4GB ECC or non-ECC, unbuffered DDR3 DIMMs - mb

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2.4.2 Memory configurations You may install 1GB, 2GB and 4GB ECC or non‑ECC, unbuffered DDR3 DIMMs into the DIMM sockets. • You may install varying memory sizes in Channel A, Channel B and Channel C. The system maps the total size of the lower-sized channel for the dual-channel or triple-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • Due to Intel spec definition, X.M.P. DIMMs and DDR3-1600 are supported for one DIMM per channel only. • According to Intel CPU spec, DIMMs with voltage requirement over 1.65V may damage the CPU permanently. We recommend you install the DIMMs with the voltage requirement below 1.65V. • Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend 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 do any of the following: - Use a maximum of 3GB system memory if you are using a 32-bit Windows OS. - Install a 64-bit Windows OS when you want to install 4GB or more on the motherboard. For more details, refer to the Microsoft® support site at http://support.microsoft.com/kb/929605/en-us. • This motherboard does not support DIMMs made up of 256 Mb (32MB) chips or less (Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB). • 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. • For system stability, use a more efficient memory cooling system to support a full memory load (6 DIMMs) or overclocking condition. 2-12 Chapter 2: Hardware information

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2.4.2
Memory configurations
You may install 1GB, 2GB and 4GB ECC or non-ECC, unbuffered DDR3 DIMMs
into the DIMM sockets.
•
You may install varying memory sizes in Channel A, Channel B and
Channel C. The system maps the total size of the lower-sized channel for
the dual-channel or triple-channel configuration. Any excess memory from
the higher-sized channel is then mapped for single-channel operation.
•
Due to Intel spec definition, X.M.P. DIMMs and DDR3-1600 are supported
for one DIMM per channel only.
•
According to Intel CPU spec, DIMMs with voltage requirement over 1.65V
may damage the CPU permanently. We recommend you install the DIMMs
with the voltage requirement below 1.65V.
•
Always install DIMMs with the same CAS latency. For optimum
compatibility, we recommend 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 do any of the following:
- Use a maximum of 3GB system memory if you are using a 32-bit
Windows OS.
- Install a 64-bit Windows OS when you want to install 4GB or more on the
motherboard.
For more details, refer to the Microsoft
®
support site at
•
This motherboard does not support DIMMs made up of 256 Mb (32MB)
chips or less (Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1
Megabyte/MB).
•
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.
•
For system stability, use a more efficient memory cooling system to support
a full memory load (6 DIMMs) or overclocking condition.
2-12
Chapter 2: Hardware information