Screen blanks out and PC fans go on full speed rampage.

[Shadowier]

Hello. I have an issue as mentioned in the tittle, PC Display Goes blank, kinda like when you shut down your pc and it shows that signal is lost and one of the fans [ not sure if it's PSU or GPU fan tho] goes on a super crazy rampage of full speed and it sounds like a race car hitting the gas pedal to the floor.
I already checked if it' s the CPU or GPU overheating, and no, it' s not. The temps are fine GPU at full load is 80 and CPU is sometimes hitting 60-65, but usually stays at 57 or so.
This thing happens at random,like.. completely random, But most of the time I got it happening while playing games, BUT, it is really weird, as I could play really heavy games like, idk, Battlefield 1 or ARMA 3, for hours without this issue to come up, but when I'm playing something lightweight CoD:MW 3 or America' s Army: PG this crazy rampage happens, not always, not instantly, but it' s there, might be a coincidence that it happened in these particular games, because I think this issue first happened when I was just browsing web. This issue is up for a week from now on.
at first I was thinking it is overheating issue, so I cleaned out the pc and re-applied the thermal paste on CPU and GPU, still happens. And anyway, was checking out the temps , they are as mentioned before, just fine. This usually happens once a day tho, but today it was my 2nd time few mins ago, and yeah, weirdly enough, 1st time happened while playing MW3 and the 2nd time while on AA: PG. When this happens not every fan is crazy as it seems, by the feeling of intense air-flow out of the case it' s between PSU and GPU, but which one of them it is , I can't tell. Tried to put the GPU fan to max speed to check how it sounds, it' s kinda similar, but not as loud as when the issue happens.
Will try to cover my specs here:
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i7 3770K @ 3.50GHz
Ivy Bridge 22nm Technology
RAM
8.00GB Single-Channel DDR3 @ 798MHz (9-9-9-24)
Motherboard
Gigabyte Technology Co. Ltd. Z77-DS3H (Intel Core i7-3770K CPU @ 3.50GHz)
Graphics
22MP55 (1920x1080@60Hz)
2047MB NVIDIA GeForce GTX 670 (Palit Microsystems)
Storage
931GB Western Digital WDC WD1002FBYS-05A6B0 ATA Device (SATA)
698GB SAMSUNG HD753LJ ATA Device (SATA)
Optical Drives
TSSTcorp CDDVDW SH-224BB ATA Device
Audio
Realtek High Definition Audio

 

[Lutfij]

You forgot to include your PSU's make and model. Please include it. On another note, have you made sure your GPU drivers are all up to date? Judging from your system it seems your PSU may be aged(and possibly unable to output the power needed). You may also try a repair install and see if any changes occur however the way you've mentioned it, the taxing of a game on your system causing the blackouts indicates your PSU is bad provided the OS isn't corrupt.

 

[Shadowier]

You forgot to include your PSU's make and model. Please include it. On another note, have you made sure your GPU drivers are all up to date? Judging from your system it seems your PSU may be aged(and possibly unable to output the power needed). You may also try a repair install and see if any changes occur however the way you've mentioned it, the taxing of a game on your system causing the blackouts indicates your PSU is bad provided the OS isn't corrupt.

I'm not sure about the PSU exact model, but it's CIT PSU 750 W.
If we take it as a GPU overheat, what may cause it?
Update: Ok I found it now> https://www.cclonline.com/product/35689/PSUCIT750UB/Power-Supplies/CIT-750W-Black-PSU/PSU0162/ < That's the PSU

 

[Paperdoc]

You are being distracted and misled by the fan symptom.

On EVERY boot-up or re-boot, the first thing the mobo does is to turn on all the fans full speed. Then it starts on its other routine start-up tasks. In a few seconds it completes some of those and comes back to reading the temperatures of the sensors inside the CPU chip and on the mobo. THEN it reduces the fan speed to whatever is needed to keep the system properly cooled. This process makes SURE that every fan starts up cleanly, and then slows down to "normal".

So, a few seconds of full-speed fan as the system reboots is NORMAL. And your description says the system suddenly quits to black screen, the monitor says it is getting no signal from the computer, and the fans speed up to full. That is the start if a re-boot.

What you have not told us is how long this condition of fast fans lasts. Nor have you told us whether the machine actually completes a clean re-boot, or does it fail completely? If it reboots fully and the fast fans last for 5 to 10 seconds, that's a normal re-boot.

Now, if that is what is happening, the question should be: why does it re-boot suddenly? If it is only in one or two games, maybe there's a software glitch in them. Or, there could be a weak component in your mobo or in your PSU that causes a major failure that lasts for a few seconds (enough to trigger a re-boot). Intermittent glitches like this can be very frustrating, I know. I went through a series a few years ago that finally got much worse, until I could narrow it down to failed components in my PSU.

 

[Shadowier]

You are being distracted and misled by the fan symptom.

On EVERY boot-up or re-boot, the first thing the mobo does is to turn on all the fans full speed. Then it starts on its other routine start-up tasks. In a few seconds it completes some of those and comes back to reading the temperatures of the sensors inside the CPU chip and on the mobo. THEN it reduces the fan speed to whatever is needed to keep the system properly cooled. This process makes SURE that every fan starts up cleanly, and then slows down to "normal".

So, a few seconds of full-speed fan as the system reboots is NORMAL. And your description says the system suddenly quits to black screen, the monitor says it is getting no signal from the computer, and the fans speed up to full. That is the start if a re-boot.

What you have not told us is how long this condition of fast fans lasts. Nor have you told us whether the machine actually completes a clean re-boot, or does it fail completely? If it reboots fully and the fast fans last for 5 to 10 seconds, that's a normal re-boot.

Now, if that is what is happening, the question should be: why does it re-boot suddenly? If it is only in one or two games, maybe there's a software glitch in them. Or, there could be a weak component in your mobo or in your PSU that causes a major failure that lasts for a few seconds (enough to trigger a re-boot). Intermittent glitches like this can be very frustrating, I know. I went through a series a few years ago that finally got much worse, until I could narrow it down to failed components in my PSU.

I'm more than just sure it's not a re-boot. Let me explain why. So, when my PC boots up the fans go full speed for 2-4 secs, but GPU fan never ever did that in my entire life with any gpu. I'll make the situation clear now:
My screen loses the signal, and I'll let u know, it's connected straight to GPU via HDMI. When the screen does that, I hear the audio running, so the PC is still running, but without an image, and ofc as soon as it blanks out, the GPU fan goes full speed, it's like overheating, but, why would it be like that all of a sudden? I once noticed while Playing America's Army, that the temps are just fine and at some random point it just starts going up without it stopping, I managed to quit the game when it reached 93 degrees, but it didn't fail. It usually fails and goes crazy just at random, Like just now, was playing Sacred 3, temps were around 60-65 and then all of a sudden the screen lost signal and the fan is full speed.
My GPU is clean and already re-applied thermal paste on it.
Also, when that happens, I can't turn off the PC or re-boot it with the keys on the case AKA Hard-reboot or power button. the only way I can stop it was to power off the PSU in the back of the case. hope that made it clear, sorry not to mention it earlier.

 

[Paperdoc]

I' surprised that you can get all those pieces of info, but they are interesting. If the temperature in the GPU card rises, that certainly would explain why its fan starts to run full speed. Now, why it should rise suddenly and keep on rising is the mystery. A shut-down of the GPU card to protect it in that situation may well be an action the GPU card is programmed for, so you might aks it maker's Tech Support guys about that.

I do not understand why a GPU overheating situation should freeze the mobo so that you cannot shut it down or reboot, though. On the other hand, if the cause-and-effect sequences is reversed, maybe it makes more sense. That is, if the PSU fails to deliver the right voltages, or the mobo fails in some way, that might cause it to lock up like that, and also cause the GPU to malfunction. Maybe a supply voltage for both the mobo and GPU that goes too high suddenly could cause both problems.

 

[Shadowier]

I' surprised that you can get all those pieces of info, but they are interesting. If the temperature in the GPU card rises, that certainly would explain why its fan starts to run full speed. Now, why it should rise suddenly and keep on rising is the mystery. A shut-down of the GPU card to protect it in that situation may well be an action the GPU card is programmed for, so you might aks it maker's Tech Support guys about that.

I do not understand why a GPU overheating situation should freeze the mobo so that you cannot shut it down or reboot, though. On the other hand, if the cause-and-effect sequences is reversed, maybe it makes more sense. That is, if the PSU fails to deliver the right voltages, or the mobo fails in some way, that might cause it to lock up like that, and also cause the GPU to malfunction. Maybe a supply voltage for both the mobo and GPU that goes too high suddenly could cause both problems.

The temp has risen only once like that, but That was most likely the heat sink not being tight enough, never happened again after I took it off again and put it on with a bit of pressure. If that' s the PSU case, how come it fails on some lower end games, but I literally could play some heavy games BF1 for example for hours and hours.
Btw, GPU now kinda like shuts down , fan doesn't go full speed, the screen just blacks out.

 

[Paperdoc]

OK, so the symptoms have changed slightly. Now the video output just fails with no fan speed-up. But does the mobo also refuse to react to the Power button and Reset button? By the way, many Power buttons are set so that, to turn the machine off, you must push in AND HOLD IN that button for 5 seconds - NOT just a simple push-and-release. Or can you turn the machine off after the video fails?

If the problem is only the failures of the video output, I'd suspect the video card is failing, and not the PSU.

 

[Lutfij]

The PSU you've listed is nothing more than a very expensive paper weight. You may need to ask yourself why a 750W unit like that costs a third of what a unit from Corsair or Seasonic would cost?

The black screen can also come about from the PSU failing to deliver power to your GPU or that your drivers are amiss on the system. Nevertheless what has been verified is that your PSU isn't what you should be running in your system. How old is your PSU btw?

 

[Shadowier]

The PSU you've listed is nothing more than a very expensive paper weight. You may need to ask yourself why a 750W unit like that costs a third of what a unit from Corsair or Seasonic would cost?

The black screen can also come about from the PSU failing to deliver power to your GPU or that your drivers are amiss on the system. Nevertheless what has been verified is that your PSU isn't what you should be running in your system. How old is your PSU btw?

It's about 2years old maybe. but if it's PSU failing, why doesn't any other of pc hardware crash or have issues? The screen blacks out in certain games I mentioned, which are pretty damn light that even my laptop in the past could run flawlessly. And it never ever fails when trying out different heavy benchmarks or playing some heavier games?
I mean if it was the PSU, It would totally fail other hardware or fail at random and/or when the pc is under a heavy stress.

 

[Lutfij]

Compared to all the components in your system, your GPU is the one drawing the most power. To begin with, the PSU isn't of any form or manner of quality and the age of the unit further cripples it's ability to deliver a sustained/consistent output to your system. It may state 750W but the internals of that PSU would speak otherwise.

Not adding insult to injury but rather trying to clear hay from a hay stack to find that needle.