Asus RS724Q-E6/RS12 - Manual (Page 29)

2-9 ASUS RS720Q-E6/RS12, RS724Q-E6/RS12
• Always install DIMMs with the same CAS latency. For optimum
compatibility, we recommend that you obtain memory modules from the
same vendor. Refer to the Qualified Vendors List on the ASUS web site.
• 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 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 512 Mb (64MB)
chips or less (Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1
Megabyte/MB).
2.3.2 Memory Configurations
You may install 1 GB, 2 GB, 4 GB, or 8GB registered / unbuffered ECC DDR3
DIMMs into the DIMM sockets using the memory configurations in this section.
Memory population table
CPU 1 Configuration
DIMM_A2 DIMM_A1 DIMM_B2 DIMM_B1 DIMM_C2 DIMM_C1
1 DIMMs -- -- -- -- --
2 DIMMs -- -- -- --
3 DIMMs -- -- --
4 DIMMs -- --
6 DIMMs
CPU 2 Configuration
DIMM_D2 DIMM_D1 DIMM_E2 DIMM_E1 DIMM_F2 DIMM_F1
1 DIMMs -- -- -- -- --
2 DIMMs -- -- -- --
3 DIMMs -- -- --
4 DIMMs -- --
6 DIMMs