Gigahertz is the correct answer I believe. 
My processor is a i5-6600k with 3.5ghz so assuming GHz is the speed I believe it would be gigahertz
        
             
        
        
        
Answer:
Proved
Explanation:
Given

 
  
Required
Find out why they represent the same
To do this, we simplify either  
   or
 or 
In this question, I will simplify  
  
Apply de morgan's law
 
   
  
 
Apply distribution property
 
   
  
 
To simplify, we apply the following rules:
 --- Inverse law
 --- Inverse law
 --- Inverse law
 --- Inverse law
So, the expression becomes
 
   
  
 
 
   
   
 
Rewrite as:
 
   
   
 
From the given parameters:

This implies that:
 
   when simplified is X or
 when simplified is X or 