oclHashcat v0.24 + 4 x hd5790
good news: i just got a message from a oclHashcat user who successfully ran latest oclHashcat v0.24 with 4x hd5970 in parallel on linux (= 8x gpu). single hash md5 was around 17,5B/s, multihash against 6000 hashes around 12B/s Smile this is perfectly as expected.
It would be good if they raise the limit of properly working GPUs on Windows to 8 too, but without breaking anything again.