On an Asus P8Z68-M PRO motherboard from, I could not find a 14.31818 MHz crystal anywhere; all of the crystals except the RTC crystal were marked with MHz integers.
You may know this, but 14.31818 MHz was used in the original IBM PC (4.772766 MHz for the 5 MHz-rated CPU (divide by 3) and (on a video card) 3.579545 MHz for NTSC colourburst (divide by 4).
So therefore (in my theory), it is easier to generate required clock frequencies (including the 100 MHz reference clock for PCI Express) with a crystal of a MHz integer than a 14.31818 MHz crystal - are all new PC motherboards going this way?
You may know this, but 14.31818 MHz was used in the original IBM PC (4.772766 MHz for the 5 MHz-rated CPU (divide by 3) and (on a video card) 3.579545 MHz for NTSC colourburst (divide by 4).
So therefore (in my theory), it is easier to generate required clock frequencies (including the 100 MHz reference clock for PCI Express) with a crystal of a MHz integer than a 14.31818 MHz crystal - are all new PC motherboards going this way?
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