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Introducing the Mainboard
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Congratulations on purchasing the L7SOM mainboard. The L7SOM main-
board is an Micro ATX mainboard that uses a 4-layer printed circuit board and
measures 244 mm x 244 mm. The mainboard features a Socket 462 that ac-
commodates AMD Athlon processors supporting frontside bus (FSB) speeds
up to 266 MHz.
The L7SOM incorporates the SiS740 Northbridge and SiS961 (or SiS961B
/SIS962) Southbridge chipsets which combine support for the new high-
bandwidth Double Data Rate (DDR) 266 SDRAM, and the AC 97 audio codec.
Note:
SDRAM provides 800 MBps or 1 GBps data transfer depending on
whether the bus is 100 MHz or 133 MHz. Double Data Rate SDRAM
(DDR SDRAM) doubles the rate to 1.6 GBps or 2.1 GBps by transferring
data on both the rising and falling edges of the clock. DDR SDRAM uses
additional power and ground lines and requires 184-pin DIMM modules
rather than the 168-pin DIMMs used by SDRAM.
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Compare the mainboard’s package contents with the following checklist:
Standard Items
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One mainboard
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One diskette drive ribbon cable
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One IDE drive ribbon cable
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One auto-install software support CD
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One 1394 bracket (optional)
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This user’s manual