Asus PSCH-SR/SCSI - Manual (Page 30)

2-12 Chapter 2: Hardware information
Table 1: Recommended memory configurations
* For dual-channel configuration (3), you may:
• 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)
Sockets
Mode/DIMM Type DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
(blue) (black) (blue) (black)
Single-channel (1) Populated — — —
(2) — Populated — —
(3) — — Populated —
(4) — — — Populated
Dual-channel (1) Populated — Populated —
(2) — Populated — Populated
(3)* Populated Populated Populated Populated
(DDR400/DDR333/
DDR266)
(DDR400/DDR333/
DDR266)
Table 2: Memory frequency/CPU FSB synchronization
CPU FSB DDR DIMM Type Memory Frequency
800 MHz PC3200/PC2700*/PC2100 400/333*/266 MHz
533 MHz PC2700/PC2100 333/266 MHz
400 MHz PC2100 266 MHz
*When using 800MHz CPU FSB, PC2700 DDR DIMMs may run only at
320MHz (not 333MHz) due to the Southbridge resource allocation.