I tested it. No matter how many gpus are used , oclhashcat only use 100% cpu of one core!
[please move my post to "hardware"]
sorry man, this is not about cat 11.9. its about cpu affinity. since this problem isnt new, i've added a workaround into oclHashcat-plus before i released it. this forces the os to use only 1 core, regardless of how many gpus you have.