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Hardware Installation
II. Speed: Normally marked as -12, which means the clock cycle time is 12ns
and the maximum clock of this SDRAM is 83MHz. Sometimes you can also
find the SDRAM marked as -67, which means maximum clock is 67MHz.
Caution: Some SDRAMs marked as -10 may
work fine with 100 MHz CPU clock, but not all
of these kinds of modules can work properly
under 100MHz external clock. We suggest you
choose and install SDRAMs that match PC 100
specification if 100MHz or above CPU clock is
selected.
III. Buffered and non-buffered: This motherboard supports non-buffered
DIMMs only. You can identify non-buffered DIMMs and buffered DIMMs
according to the position of the notch. The following figure is for your
reference:
non-buffered
Reserved
buffered
Because the positions are different, only non-buffered DIMMs can be
inserted into the DIMM sockets on this motherboard. Although most DIMMs
available in the current market are non-buffered, we still recommend you
ask your dealer for the correct type.
IV. 2-clock and 4-clock signals: Although both 2-clock and 4-clock signals
are supported by this motherboard, we strongly recommend choosing 4-
clock SDRAM for its reliability.
Tip: To identify 2-clock and 4-clock SDRAM, you
may check if there are traces connected to the
golden finger pins 79 and 163 of the SDRAM. If
there are traces, the SDRAM is probably 4-clock;
Otherwise, it is 2-clock.
V. Parity: This motherboard supports standard 64 bit wide (without parity)
DIMM modules.
VI. SPD support: The BIOS will automatically detect DIMMs with SPD, and set
to the appropriate timing. DIMMs without SPD are still able to work fine on
this board, but the BIOS POST screen will give you a warning message that
you use a DIMM without SPD.
2-18
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