I have not overclocked that chip in particular but if there's anything I've learned it's that all CPU's overclock differently, and using an overclock you find online could kill your processor. Here's one of my favorite YouTubers' tutorials. It should cover what you need to know: http://www.youtube.com/watch?v=8u7MIwphuoE
ALSO! Make sure you have sufficient cooling for overclocking, excessive heat could also damage your CPU.
I have one of these in a Gigabyte motherboard and it overclocked to 4.2ghz using the stock cooler.
I ran Prime95 on it for 14 hours without any faults and it never rose above 60*C.
I left the FSB at 200 and HT at 2000 and just upped the CPU multiplier.
I didn't have to change any of the voltages for it to be stable at 4.2ghz, but I probably will get get it running at 4.3ghz as one of Prime95's workers faulted at this speed. I've got a CoolerMaster X6 heatsink/fan in the post and when they arrive I'll see if I can get up to 4.4/4.5Ghz. I've heard rumours of people getting these chips to 5ghz but I've never seen the specs for this so it might just be someone spreading rumours based on AMD's projected theoretical performacne data.
Coolermaster X6 heatsink/fan has arrived and been installed.
Core voltage raised by +0.075 and a simple multiplier increase has the chip running at 4.5Ghz.
After an 8 hour run with Prime95 every core was still active and temperatures peaked at 64*C.
Overclocks past 4.2Ghz with my chip/mobo combination failed Prime95 testing without the vCore increase.
Now that I've raised the vCore, I will see how far it can go on this new voltage.
Looks like every step past 4.2Ghz will need a vCore increase. Luckily my motherboard (Gigabyte GA-730A-D3) can step this up at +0.025v incrememnts.
At +0.075v the FX-4300 runs nicely at 4.5Ghz but moving to 4.6Ghz will boot and show similar temperatures as 4.5Ghz but fail the Prime95 test on core 4.
At the moment I've still got a *lot* of volatage room to play with (depending on what kind of lifespan I want from the CPU and motherboard power components to last.
More results as I get the time to properly research voltages, Hypertransport link speed and run decent 8-hour Prime95 tests.
Overclocking the fx-4300 seems to be quite the hassle, or at least to get anything decant out of it.
Currently running 5.2ghz prime 95 24 hour stable.
Asus m5a97 motherboard, 1.6V cpu, 100 percent load at 55 degrees. (I am on watercooling mind you.)
Performance test (passmark) went from 4700 or so, to 6200. Makes quite a differance in score (the fx 8350 now is only 24% faster.)
I have a feeling i could go higher, as this core is pretty much brand new, so im breaking it in.
216mhz fsb with 24x multi.