> GPU cluster can crack any NTLM 8-character hashed password in 5.5 hours

A cluster of 25 AMD Radeon GPUs using OpenVCL and the Hashcat password recovery software is claimed to make 348 billion guesses per second against NTLM hashed passwords, and 63 billion against SHA1 hashed passwords according to a presentation at last week’s Passwords^12 conference in Oslo.