oclHashcat v0.23 --ERROR
win7 Catalyst 10.7b ATI Stream SDK v2.2 two hd5970

oclHashcat.exe hash.txt -n 80 --gpu-loops 1024 -m 5 -o result.txt -1 ?d ?1?1?1?1 ?1?1?1?1?1?1?1

the oclHashcat was wrong afer it runs a while like the pincture

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this is a known issue. usage of the 2nd unsupported gpu on hd5970 results in unexpected results. do not use it, see http://hashcat.net/forum/thread-73.html how to avoid it. btw cat v10.8 is already out.