Your graphic card is overclocked 130MHz and I think that should be enough for you for gaming.
If you have really nice chip you can push little more but not worth set last stable clock and faced as you say with constant crashes, voltage increasing, heat, etc... 
 
To be honest I love to OC for benchmarks first 2-3 weeks, after that only useful BIOS for me is official BIOS.
I'm not against overclocking and in BIOS, but only to improve performance for little, nothing with voltage, power target and similar things. 
Example to set memory clock from 1750MHz to 1800/1900 and if card is overclocked 120MHz to push on 150MHz,
such little changes are OK in BIOS. 
I never ever play some game with overclocked card if I couldn't play with fabric clock and need few fps more.
If fps is 50-55 than overclocking can help, if fps is 25-30, than you need better, newer graphic or second card for SLI
and you can OC for benchmark.
That's nice when new driver show up and you make little competition and try to beat own score, compare with previous drivers, I like that, that's interesting for me and because of that I tried hard to find money, save money and to find some better graphic cards.
When you get second card best way is to keep them on fabric clock 980MHz, I think most people with multi GPU do that

The answer is "No" you don't have to overclock anything.  But for some of us what you have described is "A Game in Itself " benchmarking over and over trying to beat your last score or beat someone else with a similar setup ( frustration is part of the enjoyment of overclocking )  black screen , blue screen , won't boot , cmos resets and my personal favorite complete destruction of windows requiring a reformat .   I have a laptop for emails and other important things my main rig is a just a big toy and when I'm overclocking it if I don't see a blue screen or two ... in my mind I'm not trying hard enough.
 
If your frustration is turning to anger then your best off to just leave things alone go gaming and have some fun , give yourself a break and come back to it when and if you feel like it.  
 
Take Care

RainStryke......I have to look...it is on my compatability list but scary high volts...220w...wow....also Asus gives a warning next to this 
Due to the high TDP, please be noted there are limitations while using this CPU(i.e. special thermal required..)  
FX-9590(FD9590FHW8KHK, 4.7GHz, 8C, L3:8M, 220W,rev.C0,AM3+)