BCrypt + GTX670 = 6 c/s?

[wflme]

Look at the speeds for bcrypt on http://hashcat.net/oclhashcat-plus/ under "Performance". A Radeon 7970 gets 4020 c/s and nVidia GTX 580 get 1618 c/s which should be similar to a GTX 670 going from the chart @ http://www.gat3way.eu/est.php

That's what I initially was hoping for. The GPU's are broadly speaking in the same weight category, so why the roughly 600x difference in performance.

Never tried to crack bcrypt on NV but if you change the number of hashes the speed should change. If you take a greater wordlist and the speed improves you tried a to small dictionary.

So basically, trying one hash at a time with a bigger (say, rockyou.txt) wordlist should make a difference? Will report. JFYI, I used the wordlist from JtR just to get a benchmark off my newly bought GTX.

Thanks for all the input, will update as per results.
Anton.