GPU cracking is too slow

[3kings]

gpus work on massively parallel problems, so you can only achieve full acceleration on gpu if you give the gpu enough work to do. a straight dictionary attack does not give the gpu enough work. in order to achieve full acceleration, you have to run an attack with a large enough keyspace. try adding '-r rules/d3ad0ne.rule' to the end of your command.

Radeon 290X is the best card at the moment.

Thanks again for your reply. Is there a place where I can read a description on that rule? I googled it and could find much details about it.

What about regular bruteforcing (without a dictionary) do GPUs work well with that type of attack?

Go to the wiki to learn more about rule attacks and all other kinds.

And yes, bruteforcing with GPU will use almost full work load and achieve the fastest speed.