old bug on old drivers. On blockchain and newer (18.3.4) its working as its supposed to.
The easiest fix is to update your drivers
will try today )
i hope it helps, if not i will look into it.
checked 18.3.4 today.
[2018-04-29 17:41:59] GPU0: 465.0 H/S [T: 52c, RPM: 0, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU1: 435.0 H/S [T: 62c, RPM: 904, CC: 1150 MHz, MC: 1800 MHz]
[2018-04-29 17:41:59] GPU2: 499.0 H/S [T: 60c, RPM: 860, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU3: 499.0 H/S [T: 59c, RPM: 813, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU4: 460.0 H/S [T: 60c, RPM: 870, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU5: 449.0 H/S [T: 53c, RPM: 0, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU6: 397.0 H/S [T: 61c, RPM: 863, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU7: 437.0 H/S [T: 62c, RPM: 815, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU8: 496.0 H/S [T: 59c, RPM: 0, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU9: 492.0 H/S [T: 61c, RPM: 1061, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU10: 452.0 H/S [T: 52c, RPM: 0, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:41:59] GPU11: 499.0 H/S [T: 62c, RPM: 924, CC: 1150 MHz, MC: 1900 MHz]
however config includes following:
"target_temperature" : 55,
"target_fan_speed" : 3300,
in general section
target fan speed basically not set?
here is the same drivers w your miner, but with 3-rd party overdrive util:
[2018-04-29 17:49:59] GPU0: 495.0 H/S [T: 49c, RPM: 3083, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU1: 457.0 H/S [T: 52c, RPM: 3196, CC: 1150 MHz, MC: 1800 MHz]
[2018-04-29 17:49:59] GPU2: 411.0 H/S [T: 49c, RPM: 3297, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU3: 464.0 H/S [T: 50c, RPM: 3384, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU4: 461.0 H/S [T: 51c, RPM: 3305, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU5: 494.0 H/S [T: 52c, RPM: 3378, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU6: 494.0 H/S [T: 52c, RPM: 3354, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU7: 458.0 H/S [T: 53c, RPM: 3229, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU8: 499.0 H/S [T: 50c, RPM: 3393, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU9: 499.0 H/S [T: 53c, RPM: 3234, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU10: 493.0 H/S [T: 50c, RPM: 3116, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] GPU11: 461.0 H/S [T: 52c, RPM: 3295, CC: 1150 MHz, MC: 1900 MHz]
[2018-04-29 17:49:59] Total: 5686.0 H/S