Sorry for the really late reply, but yes, 450W has been enough to feed my system with an overclocked CPU
Unfortunately you can't on this mobo (not sure if you can on others)
So first you need to know which fan connector you want to split. In my case, I've got two 3-pin fans so I needed a 3-pin splitter. Specifically, I got this one: https://www.newegg.com/Product/Product.aspx?Item=9SIA9ZN5MP3160
Also, understand that the two fans attached by the splitter will always run at the same speed; the motherboard doesn't "see" both fans and thus can't control them independently.
Lastly, keep the total amperage of your two fans on the splitter under 1 amp. You should be able to find amp ratings on case fans in milliamps, just add these up.
If you have any other questions or are confused by anything I said feel free to let me know
Yup, I've had no crashes after settling on a stable overclock.
It's holding up great! While researching mobos for this build, ASRock came up as as reliable manufacturer when on a tight budget and his board has confirmed that for me. Good build quality (though I can't really compare it to anything, it seems securely put together) and I've yet to have it crash on me once settling on a stable overclock.
However, it does have this one annoying quirk where if an overclock causes it to fail to boot, it won't automatically reset to a previous state. This means you'll have to manually reset the board, and the pins you'll have to short to do this are located right under the graphics card slot. I had one lousy weekend of constantly pulling out my graphics card and resetting the damn thing to find the fastest stable OC for my chip. But again, nothing bad aside from that.
Hey thanks! I'll do just that and update with my results.