X13 mining with -k x13modold is working for amd h5xxx and h6xxx

??
Cause i can't get it work.....
only HW
Only HW too on 7870
sgminer.exe -k x13mod -w 128 --gpu-powertune 10 --no-submit-stale --thread-concurrency 5120 -X 300
and sgminer.exe -k x13mod (no options) same issue