The PCI Simple Communication Controller bang in Device Manager is quite common. I know of several people who have noticed this and none of them are noticing any ill effects from it. It may or may not disappear if you install the chipset drivers. Buy ASRock Z170M Pro4S LGA 1151 Intel Z170 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard with fast shipping and top-rated customer service. Newegg shopping upgraded ™.
Z170M Extreme4. ASRock Super Alloy. Please refer to Memory Support List on ASRock's website for more information. For the updated Windows ® 10 driver, please visit ASRock's website for details. Certifications - FCC, CE - ErP/EuP ready (ErP/EuP ready power supply is required).
So I recently bought a Z170m-pro4s combined with a i5 6600k and I just found out this board does not have vcore adjustment. I contacted Asrock support and they confirmed the board does not support it. I am absolutely bummed by this as it is marketed as a board capable of overclocking, and it is!. You can set automatic overclock on however that will raise the voltage to stupendous high values. I am also able to set bclock, core multiplier everything! Except for Vcore voltage. Does Asrock just still needs to update this or am I really just f**** right now
Sm Bus Controller
EDIT: As of 24-09-15 Asrock made the new 1.90 bios which does allow for Vcore adjustment! Still a little tricky as it works by giving you the option of altering the mV offset from the standard 1.09 volt.