Computer Refusing to Boot After I Overclocked CPU

I usually overclock my GPU and CPU to get the best performance out of my games but I don't usually overclock my GPU and CPU at the same time because I only have a 600 watt PSU to support some high-end components.

For the sake of helping me understand why my computer won't properly boot here's my specs. GPU: EVGA GeForce GTX 770 4GB Superclocked w/ACX Cooler. CPU: AMD FX-8320. Motherboard: Gigabyte GA-970A-D3P. RAM: Corsair Vengeance Blue 8GB 1600 MHz. HDD: Hitachi 1 TB Hbecause DS721010CLA332. Case fans: Three 120mm fans. Special cooling: Hyper 212 EVO CPU Cooler. Lastly, and what I think to be the culprit behind my computer not booting is my PSU which is a Thermaltake TR2 600W.

I was probably pushing my 600 watt PSU just running those parts at stock speed but I've been able to push my luck and I've had my FX-8320 overclocked to 4.25 GHz and my EVGA 770 running slightly higher than it's stock speed. I used my system, with those two parts overclocked, for several months without issue. Earlier today I decided I'd try to go for a little more, and that was a huge mistake. I clocked my 770 at 100 MHz faster and the memory by 300 MHz over the factory clocked settings. My computer ran fine until I overclocked my FX-8320 to 4.6 GHz. I played Batman: Arkham Origins for about 40 seconds or so before my computer froze so I restarted my computer and I had planned on opening the BIOS to lower the speed of my CPU back down 4.25 but my Bios never completed loaded. After the beep at start up (I forgot what the pre-boot process is called lol) I hit the delete key, watched as the title of my Bios appeared on the screen, and then my computer shut off.

Now my computer keeps trying to restart and get through the boot process but doesn't boot, it'll actually beep and show the Gigabyte logo for my motherboard but then shut off and try to reboot again. What I suspect is happening is that between all my components and my overclocked CPU and GPU to much power is being pulled through my PSU which is causing my PC not to boot. If that's true then that really stinks because I can't change the clock speed of either my CPU or GPU if I can't get into the BIOS. Worst case scenario...my CPU and/or Motherboard was broken due to my overly ambitious overclocking.

Please help! I use my computer for so much. I do all my gaming, schoolwork, I watch movies, surf the internet, and do much more with this computer. It'll mean so much to me if someone could give my advice on how to get my computer to boot again and work just as good as it always has. I don't care what I have to do to get it to work, even if I have to take it all apart and put back together again.

You may be correct Steel_Nugget, I assumed that it was the overclocking that was causing my PC not boot simply because it stopped working after I had overclocked to a much higher setting than what I usually had it on. It could be an entirely different problem though, but I don't have much clue what it'd be because I haven't had this computer not boot before.

yes it like a watch battery but little bigger about size of a penny

unplug power .. take out battery and ram .... that for clear the memory ( on the safe side) ..wait 1,2 min then put it back .. remember to touch the case for electric static