I have actually seen the firmware version change when I changed the firmware to an older version (Notice the firmware fix on v22 for asic_count_r:
GX10_V16_20171111 (From X10 v1.1 Image).bin:
baikal_getinfo : Firmware Version: 22 - Hardware Version: 113 - BBG?: 7 - Clock: 220 - Clock << 1: 440 - ASIC Count: 45 - ASIC Count R: 45 - ASIC Ver: 114
GX10_V13_20171109 (From X10 v1.0 Image).bin:
baikal_getinfo : Firmware Version: 19 - Hardware Version: 113 - BBG?: 7 - Clock: 220 - Clock << 1: 440 - ASIC Count: 45 - ASIC Count R: 23 - ASIC Ver: 114
GX10_V11_2017 (From X10 v1.1 Image).bin:
baikal_getinfo : Firmware Version: 17 - Hardware Version: 113 - BBG?: 7 - Clock: 210 - Clock << 1: 420 - ASIC Count: 45 - ASIC Count R: 23 - ASIC Ver: 114
Okey. I noticed the clock report went down to 210 on V11.. Did you perhaps notice any differences to hash speed?