This addendum for manual rev 1.0 will show the recommended memory bank configuration when using three or more banks of SIMMs.
The S1564S/D motherboard has eight SIMM sockets arranged in four banks. Each bank has two sockets and provides a 64/72-bit wide data path. SIMMs in the
same bank must be the same type (EDO, parity,non-parity), size and speed. SIMMS must be installed in both sockets of a bank, and at least one bank must be filled for the motherboard to work. When populating SIMMs on
multiple banks, TYAN recommends using SIMMs from the same manufacturer with the same DRAM chips, size and PCB layout. The minimum memory size is 8MB, and the maximum size is 512MB. The BIOS automatically detects memory
type and size, so no jumper settings are required.
Special consideration must be taken when mixing the system board with SIMMs in three or more banks. Since banks two and three are closer to the HX chipset signal
driver, those banks will have stronger signals to the SIMMs than banks zero and one. Thus ,when using an even number of banks, keep the four SIMMs of the same type in banks two and three and place the odd SIMMs in bank
zero or one. For example when using four single sided SIMMs and two double sided SIMMs, TYAN recommends placing the single sided SIMMs in banks two and three. Then place the two double sided SIMMs in either banks
zero or one. This will distribute the Memory #CAS signals more evenly across the memory bus.
The following examples will show the recommended memory bank population when using three or more banks.
DS=double sided SIMMs
SS=single sided SIMMs