Generation of random hexadecimal string

i like to create random hexadecimal string with character 0 to 9 a to f.it must uses the GPU resource available in the pc and if it work faster means it will better. i attached the sample data for your reference.Any well experienced person with good programming skills are welcome.it should save the file output as text file.at starting of the program if it ask how many string i need to generate like tat it ask means it is better.