Why does my computer randomly crash?

[Chingsta]

Specs:
Processor: i5 2500k @3.7 Ghz (10% OC)
Mobo: P8Z68-V LX
GPU: nVidia Geforce 560 ti
PSU: 600w OCZ
RAM: 8gb (4x2gb) 1600 mhz Corsair
Cooler: COOLER MASTER 212+
1 TB Hard Drive

Problem:
Whenever I try to livestream, I constantly crash. It happens anywhere from 3 minutes to about 20 minutes of streaming. I checked my CPU temps and they stay around 45C do temperature isn't a problem. It's not XSplit, either, because I had my computer crash from simply playing Batman: Arkham City, as well. Now, the crashes outside of XSplit are RARE, but they DO happen and it annoys me. The crashes from XSplit, however, constantly happens. Do I need a better psu?? I don't understand why my computer would constantly crash during a livestream and very rarely crash (Once out of a blue moon) during normal use. Any help will be greatly appreciated. Thanks!

[IAntDemo]

PSU 600watt is low

give me 2mins to sketch out your watt

Your cpu overclocked will be using about 10% of 95watt =9.5, your cpu is 95watt without overclock so I've added 10 so now

Cpu : 105watt
ram:24watt
GPU in FULL Stress: 449watt
harddrives im not sure how much they use but it won't be alot

i'd upgrade to a 850watt and i highly doubt you'll get this crash again

[Chingsta]

850w?! LOL I figured my psu was pretty low, but don't you think 850w is overkill? Can't I settle for something like a 750w? Or even a 700w?
Thanks for your input, though

[IAntDemo]

I don't actually think it's overkill, if anything it's underkill, now a days theirs 1,000+ watt and I think buying one is for future use.. I personally would go for 850+

[Chingsta]

True that....I SHOULD get a good one in case I ever wanna save money and use it for future builds. Thanks!