Pin 1
8. Install DIMM Modules
6. JP23 FSB/PCI Clock Ratio
This jumper is used to specify the relationship of PCI and FSB clock. Generally speaking, if you are
not overclockers, we recommend you to set at the default setting. By the way, this motherboard
also provides “
1MHz Stepping Adjustment
” feature for overclockers. You can adjust CPU FSB
frequency via BIOS setup program. Based on the CPU type, the adjustment range has three level:
66~90 (FSB=66MHz, such as Celeron™ 533), 100~127 (FSB=100, such as Pentium
®
III 800E),
133~248 (FSB=133, such as Pentium
®
III 800EB) MHz for your choosing. If you fix the CPU FSB
frequency by JP23, the “1MHz Stepping Adjustment” range will be changed and following JP23
setting.
This motherboard has installed the DDR SDRAM interface which allows zero wait state
bursting between the SDRAM and the data buffers at 100 or 133MHz. The two 184-pin
sockets, four banks of DDR SDRAM can be composed of an arbitrary mixture of
1M/2M4M/8M/16M/32M/64MxN DDR SDRAM with maximum up to 2GB. Besides, this
motherboard has added two 168-pin SDRAM sockets that allow you to install PC100 or
PC133 memory up to 2 GB either.
Warning:
High CPU core voltage
may be able to increase CPU
speed for overclocking, but you
may damage the CPU or reduce
the CPU lifecycle.
1 2
Auto (Default)
FSB=133
FSB=100
FSB=66
DDR
SDRAM
7 8
SDRAM
Warning:
The AX37D Plus / AX37D Pro
supports both DDR SDRAM and SDRAM,
please do not install the SDRAM on the
DDR SDRAM sockets and vice versa.
Otherwise, it will cause serious damage
on memory sockets or SDRAM module.
7. Connecting IDE, Floppy and IDE RAID Cables
Connect 34-pin floppy cable and 40-pin IDE cable to floppy connector FDC and IDE/IDE
RAID (AX37D Plus only) connector. Be careful of the pin1 orientation. Wrong orientation
may cause system damage.
Pin 1
ATA 33/66/100
IDE Connector
FDD Connector
IDE RAID
Connector
(AX37D Plus only)
IDE RAID 2 (Secondary)
IDE RAID 1 (Primary)
This motherboard had included a DDR terminator module which is used to terminate the
electronic data on DDR SDRAM DIMM from flowing into the SDRAM DIMM. Therefore, you
must insert this DDR terminator module if you want to use your DDR SDRAM, which could
otherwise cause serious damage to both SDRAM.
Pin 1
Key
1. Make sure the module’s pin face down and match the socket’s size as depicted below.
Key
Pin 1
Tab
2. Insert the module straight down to the first SDRAM DIMM slot with both hands and
press down firmly until the DIMM module is securely in place.
Warning: You must insert this
DDR terminator module if you
had installed RAM module on
your DDR SDRAM. Please also
remember to remove this
terminator module if you want to
use your SDRAM module.
