• 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 conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
• Memory module with memory frequency higher than 2133 MHz and its corresponding
timing or the loaded XMP Prole is not the JEDEC memory standard. The stability and
compatibility of these memory modules depend on the APU's capabilities and other
installed devices.
• 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:
- Install a maximum of 3GB system memory if you are using a 32-bit Windows
®
OS.
- Use a 64-bit Windows
®
OS if you want to install 4GB or more memory on the you want to install 4GB or more memory on the
motherboard.
• This motherboard does not support DIMMs made up of 512 megabits (Mb) chips or less.
• The maximum 32GB memory capacity can be supported with 16GB or above DIMMs.
ASUS will update the memory QVL once the DIMMs are available in the market.
1.7.2 Memory congurations
You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM
sockets.
• 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. To operate at the vendor-marked or at a
higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory frequency
adjustment.
• For system stability, use a more efcient memory cooling system to support a full
memory load (2 DIMMs) or overclocking condition.
F1A55-M LX R2.0 Series Motherboard Qualied Vendors Lists (QVL)
DDR3-2250(O.C.) MHz capability
DDR3-2200(O.C.) MHz capability
Vendors Part No. Size SS/DS Chip Brand Chip NO. Timing Voltage
DIMM socket
support (Optional)
1 DIMM 2 DIMMs
KINGSTON KHX2250C9D3T1K2/4GX(XMP) 4GB(2 x 2GB) DS - - - 1.65V • •
Vendors Part No. Size SS/DS Chip Brand Chip NO. Timing Voltage
DIMM socket
support (Optional)
1 DIMM 2 DIMMs
KINGMAX FLKE85F-B8KJA FEIH(XMP) 4GB(2 x 2GB) DS - - - 1.5V-1.7V • •
Chapter 1: Product introduction1-12
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General
Weight and Dimensions
