Got High Sierra running on my FX 6300. Spent days trying to install it with a crappy version to no avail, but then found an an AMD specific version which worked first
AMD FX 8350 - 8320 - 6300 and 4300 CPU performance review - Introduction
GitHub - uttusharma/AMD-FX6300-Hackintosh-OC: This opencore efi for amd 15h/16. Tested on Catalina 10.15.4, amd fx6300, nvidia gt730. Only for educational purposes.
AMD FX-8350, FX-8320, FX-6300 and FX-4300 | XBitLabs
AMD FD6300WMHKBOX FX-6300 6-Core Processor Black Edition
Best Buy: CyberPowerPC Gaming Desktop AMD FX 6300 8GB Memory AMD Radeon RX 560 2GB 1TB HDD Black GUA1600BST
Amazon.com: AMD FD8370FRHKBOX FX-8370 Black Edition 8 Core CPU Processor AM3+ 4300Mhz 125W 16MB : Electronics