MB: Asus M5A78L-M LX V2
While I can agree you MIGHT fry the board, you might not. There are two reasons you won't, one is because CPU is throttling itself periodically. FX CPU's need APM properly disabled in order to not do that, otherwise it will simply not exceed it's 95W average TDP rating. Asus didn't likely include the necessary BIOS controls to do it on that board.
But if they did, then the VRM's own thermal protection would likely prevent it from burning up. When it overheats it also throttles the CPU to prevent going into dangerous temperatures. FX processors were so easy to overclock even on Asus's low-end boards their VRM thermal protection was about the only reason they didn't all burn up.
I operated my FX6300 on an M5a88m for 6 or 7 years OC'd to 4.5Ghz. I'd found a utility that could be used to disable APM without BIOS controls so that was fixed but the VRM would still throttle under heavy load with overtemp. So I stuck some heatsinks on the FETS, put a fan to blow on them and it would delay throttling but still did it when rendering videos. Rendering time was pretty much the same as clocking the CPU at 4.3Ghz where it never throttled, but I liked seeing the 4.5Ghz. I could get it to 4.7Ghz with enough voltage but the throttling made it irrelevant since it would even throttle when playing a game...I think maybe even just clicking around in Windows or web browsing, or maybe that was if APM wasn't disabled.
I now have the same FX6300 on an old board my son had (Gigabyte FX970-UD3 or something like that) which has a fairly good VRM for the day. It also includes the BIOS control to disable APM so the CPU won't throttle itself. I have it stable at 4.6Ghz with a safe voltage but CPU temps are running about as high as I want during a Cinebench run. If I wanted to try for 4.7Ghz it needs a decent AIO or giant tower (think Noctua DH 14 or 15) to cool it well enough and I'm not sure what voltage it would need. All the parts are used cast-offs from upgrades except for a 16GB DDR3 kit I bought for the thing. I'm not about to lay out the money for a giant cooler just to get 100 or 200 Mhz more out of it when it sits in the closet most of the time.