@zahid888

I dont understand how you get your seeds are you just randomizing them? I update your code for multiple GPUs:

import random
import subprocess

while True:
    x = input('seed integer : ')
    seed_value = int(x)
    random.seed(seed_value)
    seed = str(seed_value)
    a = random.randrange(2**31, 2**32)
    random_start = "%00x" % a
    random_range = (random_start+"000000000:"+random_start+"fffffffff")
    print('\nSeed : ' + str(x) + ' KHex : ' + str(random_start) + '\n')
    cmd_command =('VanitySearch-1.15.4_bitcrack_th512gr -stop -t 0 -gpu -gpuId 0,1,2,3,4,5,6,7 --keyspace '+random_range+' 1MVDYgVaSN6iKKEsbzRUAYFrYJadLYZvvZ\n')
    subprocess.call(cmd_command, shell=True)