[SOLVED] BIOS update with CPU that is not supported

Dec 27, 2018
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Will the MB boot BIOS to update it with unsupported CPU installed?
MB - GA-H81-D3 (rev. 1.0)
BIOS - F3
CPU - i5-4570 (since BIOS F5)
The guy I'm buing it from says that he run it with i3-4130T and F3 BIOS. But Gigabyte suport says that even his CPU is supported since F5 version.

Just to update: https://www.overclockers.ua/motherboard/gigabyte-ga-h81-d3/all/
Here they have F3 BIOS with i5-4670K, CPU that is also supported since F5 version.