2-3.4 2-Clock And 4-Clock; 2-3.5 Parity And Non-Parity; 2-3.6 Memory Auto Detection By Bios - Intel BX User Manual

II.HARDWARE INSTALLATION
The difference between buffered and non-buffered DIMM can be identified by the
notch position shown above.
2-3.4 2-clock and 4-clock signal
Both 2-clock and 4-clock SDRAM DIMM supported by this mainboard.

2-3.5 Parity and Non-parity

This mainboard supports standard 64 bit (Non-parity) and 72 bit (Parity) DIMM
modules.

2-3.6 Memory Auto detection by BIOS

This mainboard BIOS can automatically detect the DIMM memory size and type, so
you do not need to adjust any hardware or software settings. The maximum memory
size supported up to 1GB.
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