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M
EMORY
C
ONFIGURATION
4
4
The HOT-687V mainboard provides three 168-pin DIMM sockets that make it possible to
install from 16MB up to 768MB of SDRAM. The DIMM socket support 16MB, 32MB,
64MB, 128MB and 256MB 3.3V single- or double- side SDRAM DIMM.
The three DIMM sockets are arranged in three banks of one socket each, Each bank pro-
vides a 64/72-bit wide data path.
HOT-687V provides optional data integrity features including EC (Error Checking) or ECC
(Error Checking and Correcting) in the memory array. EC mode provides single and
multiple bit error detection. In ECC mode, during reads from the DRAM, the HOT-687V
provides error checking and correction of the data.
To support ECC, you must use true (opposed to phantom parity generated by TTL chips) 72-
bit parity-type DIMM for all modules.
Install Memory
Install memory in any or all of the banks and in any combination, as follows:
DIMM
Socket
Memory Modules
Moudule
Quantity
DIMM 1
16MB, 32MB, 64MB, 128MB, 256MB 168-pin
3.3V SDRAM DIMM
x 1
DIMM 2
16MB, 32MB, 64MB, 128MB, 256MB 168-pin
3.3V SDRAM DIMM
x 1
DIMM 3
16MB, 32MB, 64MB, 128MB, 256MB 168-pin
3.3V SDRAM DIMM
x 1
Table 4-1
Upgrade Memory
You can easily upgrade the system memory by inserting additional SDRAM modules in
available DIMM banks. The total system memory is calculated by simply adding up the
memory in all DIMM banks. After upgrade, the new system memory value will automati-
cally be computed and displayed by the BIOS Standard CMOS Setup menu.
