Overclocking Failed

My PC won't boot sometimes and will give me a black screen and will not beep but all the fans will be running. I have to restart it several times before it gets going It will then give me a overclocking failed when I have it on Turbo settings on the UEFI BIos for ASUS. When It is in power saving mod it will start right up. My PC is 4 yrs old and most the parts in it are the same age but The GPU is the only thing that is not that old. I was planning on replacing the liquid cooler this week and getting a new case with better ventilation. I believe that my CPU is getting too hot. but I am unsure. Any help will be great

Computer Specs
AMD A-10 APU 5800k 3.8ghz --->CPU
ASUS FA285-V Pro ---> Motherboard
G.Skill Ripjaws X series 16gb (2x8gb)--->Ram
Seagate Barracuda 1TB 7200 rpm --->HDD
ASUS GTX660 2gb-DDR5 192-bit --->GPU
Thermaltake 850w --->PSU
ULTRA XBlaster Pro U12-42350 ---> Case

I turned the bios to power saving and it still gives me a black screen and nothing responding it seems like it is getting worse