BCrypt + GTX670 = 6 c/s?

[wflme]

Hi there,

I'm trying to crack two bcrypt hashes with a tiny dictionary and am receiving ludicrous rates at about 5-6 c/s.

Thing is, my specs are as follows, so one would think it should be running a wee bit faster than that:

oclHashcat-plus 0.12
Windows 8 x64
GTX 670 / Core i7 3820

Command line is as follows: cudahashcat-plus64 -m 3200 hash.txt wordlist.txt

Any input would be appreciated.

Quick edit: Probably should add that both MD5 (2437.7M/s) and SHA1 (577.6M/s) results are quite respectable, so I'd rule out hardware/drivers problems.

Thanks,
Anton