There can be no conversion.
GHz is a measure of frequency, with dimensions [T^-1]. Mph is a measure of speed with dimensions [LT^-1]. According to the most basic rules of dimensional analysis, conversion between two measures with different dimensions is not valid.
3.00 Ghz
Oh honey, you're mixing apples and oranges here. 2.4GHz is a measure of frequency, not speed like mph. It's like asking how tall a banana is in pounds. Just focus on enjoying your gadgets and let the mph be for cars, okay?
69 mph It can be any speed but probably about 60 mph
53 mph
150 mph
it is 161.6 mph
46.6 mph
1536.029586624 MPH
About 8.7 MPH
5.11 mph
357 mph
About 761 mph