Asus PRIME Z370-A User Guide - Page 22

Memory configurations

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Chapter 1 Memory configurations You may install 2 GB, 4 GB, 8 GB and 16 GB unbuffered and non‑ECC DDR4 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. • Due to the memory address limitation on 32-bit Windows® OS, when you install 4 GB or more memory on the motherboard, the actual usable memory for the OS can be about 3 GB or less. For effective use of memory, we recommend that you do any of the following: a) Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS. b) Install a 64-bit Windows® OS when you want to install 4 GB or more on the motherboard. c) 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 512 Mb (64 MB) chips or less (Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB). • The default memory operation frequency is dependent on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. 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 (4 DIMMs) or overclocking condition. • Always install the DIMMS with the same CAS Latency. For an optimum compatibility, we recommend that you install memory modules of the same version or data code (D/C) from the same vendor. Check with the vendor to get the correct memory modules. • Visit the ASUS website for the latest QVL. 1-6 Chapter 1: Product Introduction

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1-6
Chapter 1: Product Introduction
Chapter 1
Memory configurations
You may install 2 GB, 4 GB, 8 GB and 16 GB unbuffered and non-ECC DDR4 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.
•
Due to the memory address limitation on 32-bit Windows
®
OS, when you install 4 GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3 GB or less. For effective use of memory, we recommend that you do any of
the following:
a)
Use a maximum of 3GB system memory if you are using a 32-bit Windows
®
OS.
b)
Install a 64-bit Windows
®
OS when you want to install 4 GB or more on the
motherboard.
c)
For more details, refer to the Microsoft
®
com/kb/929605/en-us.
•
This motherboard does not support DIMMs made up of 512 Mb (64 MB) chips or less
(Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB).
•
The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
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 (4 DIMMs) or overclocking condition.
•
Always install the DIMMS with the same CAS Latency. For an optimum compatibility,
we recommend that you install memory modules of the same version or data code
(D/C) from the same vendor. Check with the vendor to get the correct memory
modules.
•
Visit the ASUS website for the latest QVL.