Pentium SQ578, User Manual

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SQ578
3-10
Total Memory (Slot 1-4) Bank A (Slot 1 & 2) Bank B (Slot 3 & 4)
128MB 32MBx2 32MBx2
128MB 64MBx2 None
256MB 64MBx2 64MBx2
3.2.3 Installation Procedure for SIMM
Insert SIMM into the
SIMM sockets at a 45
degree angle.
1) PIN1 of the SIMM must match with the PIN1 of the SIMM socket.
2) The module will only insert into the socket one way. An orientation cut-out will
prevent you from inserting it the wrong way.
3) Insert the SIMM into the SIMM socket at a 45 degree angle. If pin 1 of the SIMM does
not line up with pin 1 of the socket, the SIMM will not insert into the socket. After
inserting the SIMM module completely into the socket, push the SIMM module into a
vertical position.
4) The module should click into place with the retaining clips at each end of the socket
snapping behind the module to secure it.
5) To release the memory module push both retaining clips outwards and carefully rock
the module forward.
IMPORTANT: Do not use SIMM that use an extra TTL chip to convert the memory
module from asymmetric to symmetric.
3.2.4 DIMM (Dual Inline Memory Modules)
The SQ578 mainboard features two 168-pin DIMM sockets with each supporting 8MB to
128MB of SDRAM/EDO using 1MBx64, 2MBx64, 4MBx64 and 8MBx64 DIMM
(Asymmetrical single and double sided). The DRAM interfaces on a 64-bit wide, data path.
Also supported is 3.3 or 5 volts 66.67Mhz unbuffered Synchronous DRAM (SDRAM) and
3.3V or 5V volts 60ns or faster unbuffered EDO DRAM. The EDO DRAM and SDRAM are
defined below.