Gigabyte 5AX User Manual page 5

5AX
120 , 125 , 130 , 135 or 140 MHz because these frequencies are not the
standard specifications for CPU, Chipset and most of the peripherals.
Whether your system can run under 105, 110, 115,120, 125, 130, 135 or 140
MHz properly will depend on your hardware configurations: CPU, SDRAM,
Cards, etc.
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