600 Series processors include four different classes: N600 (32 bit), U600 (32 bit + MMU), NX600 (64 bit) and UX600 (64 bit + MMU). With MMU, UX600 sup ...

Let's say your processor is running at 3,500 MHz, but you want to show that in GHz. Since Hz is an SI unit, one uses the SI prefix system where the G stands for giga and is a multiple of 1,000.