User`s manual

FR550
3-8
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 FR550 mainboard features two 168-pin DIMM sockets with each supporting 8MB to
64MB 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 volts 66.67Mhz unbuffered Synchronous DRAM (SDRAM) and 3.3V
volts 60ns or faster unbuffered EDO DRAM. The EDO DRAM and SDRAM are defined
below.
3.2.5 DIMM Combination
Type Capacity Organization DIMM Clock Speed
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
8MB 1Mx64 1Mx16
1bank
(DIMM1 or 2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
16MB 2Mx64 1Mx16
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
16MB 2Mx64 2Mx8
1bank
(DIMM1or 2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
32MB 4Mx64 2MBx8
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
64MB 8Mx64 2MBx8
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
8MB 1Mx64 1Mx16
1bank
(DIMM1 or 2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
16MB 2Mx64 1Mx16
2banks
(DIMM1&2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
16MB 2Mx64 2Mx8
1bank
(DIMM1 or 2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
32MB 4Mx64 2MBx8
2banks
(DIMM1&2)
66.67Mhz