PC keeps shutting down and powering on

[SerialKillerBob]

so my specs are:
Asus Z87-Pro
16GB Gskill RAM
i5-4670k
GTX 780 GPU
900watt PSU
so I built my pc about a month ago and had no problems but recently when I power it down the next time I boot up it keeps shutting down and booting up in like 5sec intervals, when I unseat the ram and put it back in it boots up. I have ran the windows memchk and it says the ram is good so I could use some help please

 

[dottorrent]

What's the PSU? We need to know the make, as that could be the problem.

 

[VincentP]

so my specs are:
Asus Z87-Pro
16GB Gskill RAM
i5-4670k
GTX 780 GPU
900watt PSU
so I built my pc about a month ago and had no problems but recently when I power it down the next time I boot up it keeps shutting down and booting up in like 5sec intervals, when I unseat the ram and put it back in it boots up. I have ran the windows memchk and it says the ram is good so I could use some help please

You can't really test your memory with Windows running. Download memtest86+ as an iso image, burn it to a CD and boot from this to test. Allow it to complete at least one full pass, which will take at least an hour.

Saying that though, your power supply seems like a more likely culprit. What is the brand and model of your power supply?

 

[SerialKillerBob]

What's the PSU? We need to know the make, as that could be the problem.

so my specs are:
Asus Z87-Pro
16GB Gskill RAM
i5-4670k
GTX 780 GPU
900watt PSU
so I built my pc about a month ago and had no problems but recently when I power it down the next time I boot up it keeps shutting down and booting up in like 5sec intervals, when I unseat the ram and put it back in it boots up. I have ran the windows memchk and it says the ram is good so I could use some help please

You can't really test your memory with Windows running. Download memtest86+ as an iso image, burn it to a CD and boot from this to test. Allow it to complete at least one full pass, which will take at least an hour.

Saying that though, your power supply seems like a more likely culprit. What is the brand and model of your power supply?

sorry about that the Brand is Antec also forgot to mention the PC is now freezing up under no stress

 

[VincentP]

What model of Antec?
What do you mean by "freezing". Describe what you see.

 

[SerialKillerBob]

its antec HCG (High Current Gamer)-900w ATX 12V v2.32 tell me if you need anymore info and by freezing I mean just that completely freezes no key commands no mouse no nothing

 

[VincentP]

It is a very good supply, and rated much higher than you require with a single GTX 780 card.
That doesn't mean the power supply isn't faulty of course, but at least we've ruled out a rubbish supply.

RAM issues would usually cause a blue screen of death rather than a freeze. Temperature issues could cause windows to freeze or shut down. Maybe use some software to display CPU temp.

It is always a good idea to install the latest driver too of course.

 

[SerialKillerBob]

yea cpu temp never gets over 34C ill check the drivers though see if there's anything new

 

[Tradesman1]

Also check the BIOS and mobo drivers and make sure they are updated

 

[tachaloux]

so my specs are:
Asus Z87-Pro
16GB Gskill RAM
i5-4670k
GTX 780 GPU
900watt PSU
so I built my pc about a month ago and had no problems but recently when I power it down the next time I boot up it keeps shutting down and booting up in like 5sec intervals, when I unseat the ram and put it back in it boots up. I have ran the windows memchk and it says the ram is good so I could use some help please

 

[tachaloux]

SOUNDS LIKE A BADD HARD DRIVE OR AN ERROR ON IT

 

[Pondering]

What is the frequency and voltage on the memory?

There is that only use 1.5v for intel or something. I have no idea. This is just the information for the other people to better help you.