http://hashcat.net/oclhashcat-plus/ http://hashcat.net/oclhashcat-plus/ gives 1003 Mc/s for one AMD hd7970. Divided by 7500 that's 134 kc/s. 18 days to search

http://hashcat.net/oclhashcat-plus/ http://hashcat.net/oclhashcat-plus/ gives 1003 Mc/s for one AMD hd7970. Divided by 7500 that's 134 kc/s. 18 days to search through all alphabetical 8 character passwords, and 244 to search through all alphanumeric 8 character passwords. Realistically an attacker would have several cards and use rule based dictionary attacks. Using a secure password hashing algorithm will not help you against weak passwords.