Asus AW171 - Manual (Page 38)

2-12 Chapter 2: Hardware information
2.5.2 Memory configurations
You may install 64MB, 128MB, 256MB, 512MB, 1GB and 2GB DDR
DIMMs into the DIMM sockets using the memory configurations in this
section.
Important notes on memory configurations
Table 1 Recommended memory configurations
* Use only identical DDR DIMM pairs.
* For dual-channel configuration (3), you may:
Sockets
Mode DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
Single-channel (1) — Populated — —
(2) Populated — — —
(3) Populated Populated — —
Dual-channel* (1) — Populated — Populated
(2) Populated — Populated —
(3) Populated Populated Populated Populated
• install identical DIMMs in all four sockets
or
• install identical DIMM pair in DIMM_A1 and DIMM_B1 (blue sockets)
and identical DIMM pair in DIMM_A2 and DIMM_B2 (black sockets)
1. Installing DDR DIMMs other than the recommended configurations
may cause memory sizing error or system boot failure. Use any of
the recommended configurations in Table 1.
2. In Dual-channel configurations, install only identical (the same type
and size) DDR DIMM pairs for each channel.
3. Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor. See list of Qualified Vendors List on page
2-13.
4. When all four sockets are populated with 1GB DIMMs (total 4GB),
the system may detect only 3+GB (a little less than 4GB) due to
the Northbridge resource allocation.
5. It is recommended to use the black DIMM slots first.