Gigabyte 78LMT-USB3 rev 4.1 User Manual
Page 25 User Manual: "Normal CPU Vcore 1.3250V
Page 28 User Manual: "CPU Voltage Control
Allows you to set the CPU Voltage. Auto sets the CPU voltage as required. The adjustable range is dependent on the CPU being installed. (Default Normal)"
This means the 1.4250v may be normal voltage for your CPU.. depends on the CPU model and specific technical information. If it is abnormal for the CPU model, the overheating may be due to overclocking, deficient cooling, weather, the specific task... enable the CPU's BIOS and Windows power options so it only runs at 100% when needed... at least while the actual cause is found.
User manual (view/download)
http://download.gigabyte.ru/manual/mb_manual_ga-78lmt-usb3_v.4.1_e.pdf
Info on FX-8350 Temp... lacking the CPU model.
http://www.tomshardware.com/answers/id-3019896/good-voltage-fx8350.html
http://www.tomshardware.com/answers/id-1865311/8350-core-voltage.html
http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series%20FX-8350.html