Define GB and GHz?

GB - GigaBytes
Gb - GigaBits
GHz - GigaHertz

Giga means 10^9 (1 followed by and 9 zeros, it is 1000 times Mega which is 1 followed by 6 zeros)
GB and Gb are units for digital data capacity or file size

(1 Byte = 8 bits)

GHz is unit of frequency or clocking speed. Hertz = 1/Second or per Second

- Neeraj Sharma

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