Nvidia GTX GPU not working

[Scatchy]

I'm not sure why it is throwing that error but hashcat ran.  It only took 3 seconds to run through your password list of 1.7 million and it did not find a match.

The default for most OPTUS routers is 20 characters.  The first 15 are capital A-Z and the last 5 are numeric.

A mask of:

?u?u?u?u?u?u?u?u?u?u?u?u?u?u?u?d?d?d?d?d

should cover it but it is a huge keyspace.

thanks for the help guys its working but i cant seem to figure out why it has a CL_DEVICE_NOT_FOUND

and im getting a really really low hash rate of average 500kH/s

any thoughts?