Possible CPU Overheat... or something

When I was playing a game all of the sudden it crashed, my monitor went to sleep and I hear a fan inside my computer starting to blow like crazy. Since nothing else seems to happen I turned off the computer by holding the on/off-switch. This has happen with three graphicly demanding games (My setup met the system specs still) and one time after I turned the computer off and on again I get this screen: https://ibb.co/mQV355 I can no longer play games with maxed out settings and have to lower them in order to not have the game crash on me.
I've had this problem for a couple of weeks now. I have also just had to get a new graphics card graphics card very recently because my old one crashed (before I noticed this issue). My PC was built in the summer of 2014. This has never happened before. I've tried cleaning the insides of my computer twice with a can of compressed air but it didn't do much. I don't know what has happened lately that have created this annoyance.
Here's how much memory and CPU my game can take up: Imgur: The most awesome images on the Internet.
My SSD is SSD 120GB Samsung 840 EVO, Basic. My CPU is Intel(R) Core(TM) i5-4670k CPU 3.40GHZ. My motherboard is an MK ASUS Z87-A ATX Z87, 1150. I've got A-Data 8 GB RAM DDR3 1600Mhz/CL9/XPG and my graphics card is GeForce GTX 780 (same as the one before). All this on a Windows 10.

Try a GPU test program (Furmark) to see if it will trigger the problem. There is a utility called GPU-z built into Furmark which lets you monitor the system via the sensors tab. Keep an eye on it during the run and post a screenshot of it.

Diagnostic test

 GPU TEST

Run Furmark to test your GPU. Furmark tutorial

   Note

Run Furmark for around 30 minutes

   Warning

Your GPU temperatures will rise quickly while Furmark is running. Keep a keen eye on them and abort the test if temperatures rise too high

   Warning

Your GPU temperatures will rise quickly while Furmark is running. Keep a keen eye on them and abort the test if temperatures rise too high

[/QUOTE]

If I may ask, how high temperature is too high? When should I abort the test? I don't want experience artifacts on my screen and buy a new graphics card

If it starts to go above 80C I would be concerned, do not let it go above 85C. Actual tolerances can vary, see if there are any recommendations for your GPU.

Your CPU is overheating, you will definitely need to do something.

That will involve taking off the heatsink and cleaning the surfaces and re-applying thermal paste.

You can't of course see what's going on there, but it is the primary point of contact for heat dissipation. literally for the CPU and of course the GPU. You are unlikely to know what did/has happened.

Obviously you can confirm that with some application which shows CPU max temperatures under load. You would be looking to lower than say ~80°C with Intel CPUs and Nvidia GPUs.
I use CPUID HWMonitor for this, there are plenty of others doing the same job.

You may as well check on the GPU at the same time.

I did the GPU stress test for 12 minutes. The highest my Intel (R) HD 4600 was 80° C (Furmark Intel RHDgraphics — imgbb.com) and my 780 went probably up to 72° C (Furmark780 — imgbb.com)

Dude said:

What about your CPU??????

I did the CPU Burner for about 10 minutes and my CPU went up to 82° C without crashing. Does that answer your question?

Jakoporeeno said:

I did the CPU Burner for about 10 minutes and my CPU went up to 82° C without crashing. Does that answer your question?

Hi,

Can you please post a photo of your PC case from left side and one photo with the side cover off? It will give us a better understanding of the overheating.