Monitor "no signal" while gaming.

[FrozenPlasma]

After anywhere from 5-60 minutes in game, the video signal to my monitor cuts out and my GPU fans turn up to 100%. Sometimes the sound from the game continues to play, sometimes the sound cuts out, and sometimes it takes a few seconds before it cuts out. The only way to get the signal back is to restart my PC.
It happens while playing Dying Light at 1080p max settings, and once during a long 4-player session of Rocket League at max settings. If I turn down Dying Light's settings to medium at a lower resolution, it seems to be pretty stable for a while. I have had it happen once at these settings though (GPU temps were below 50).

PC specs:
CPU: i5 4690k with aftermarket cooler but not overclocked
GPU: EVGA GTX 970 with ACX 2.0, also not overclocked
RAM: 16GB G.SKILL 1600mhz (2x8gb)
PSU: Diablotek PHD 650w
Motherboard: ASRock Z97E-ITX/ac
HDD: Seagate Hybrid 1TB
SSD: Intel 120GB

What I already know / have done:
All of my drivers are up to date.
I uninstalled my graphics drivers with Guru3D Display Driver Uninstaller and reinstalled.
My CPU and GPU temps seem to be fine while gaming. CPU temps didn't go above 60C, and with EVGA's PrecisionX tool I set a custom fan curve for my GPU so that the temps never went above 65C.
My fans are all spinning.
The 8 and 6-pin power connectors are fully plugged in.

Any ideas?

 

[chris987]

http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/9#.VtGPw32LTiw

your psu is garbage... please get a quality unit if you value your system!!!!!

chose a tier 1/2 from here.

http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

 

[martin4oto6]

do u have more than 1 monitor?

 

[FrozenPlasma]

http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/9#.VtGPw32LTiw

your psu is garbage... please get a quality unit if you value your system!!!!!

chose a tier 1/2 from here.

http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

I'm aware Diablotek is a pretty bad brand, but I've had this PSU for years and it has worked with many different builds.
Is there a way I can test if it's for sure the PSU's fault before getting a new one?

 

[FrozenPlasma]

do u have more than 1 monitor?

Nope, just one connected via HDMI.

 

[chris987]

http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/9#.VtGPw32LTiw

your psu is garbage... please get a quality unit if you value your system!!!!!

chose a tier 1/2 from here.

http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

I'm aware Diablotek is a pretty bad brand, but I've had this PSU for years and it has worked with many different builds.
Is there a way I can test if it's for sure the PSU's fault before getting a new one?

did you go through the review? please read it carefuly and make your own results.!

The Bottom Line
With the PHD650, Diablotek seemingly tried to polish a turd with a turd and as such we got the expected outcome, a pile of crap. Given the horrible build quality of the unit and poor component selection of the unit that is hardly a startling result. With a current price of ~$49.99, users would be better off taking their cash and setting it on fire rather than buying this unit. There is quite literally no price point or situation where the Diablotek PHD650 should be a consideration for users as it failed almost every test possible today. Retailers and e-tailers should be ashamed to be selling such a product.

even if it was still brand new i would still throught it out of the window.! if something is faulty in your system thats defenately your psu.

 

[FrozenPlasma]

http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/9#.VtGPw32LTiw

your psu is garbage... please get a quality unit if you value your system!!!!!

chose a tier 1/2 from here.

http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

I'm aware Diablotek is a pretty bad brand, but I've had this PSU for years and it has worked with many different builds.
Is there a way I can test if it's for sure the PSU's fault before getting a new one?

did you go through the review? please read it carefuly and make your own results.!

The Bottom Line
With the PHD650, Diablotek seemingly tried to polish a turd with a turd and as such we got the expected outcome, a pile of crap. Given the horrible build quality of the unit and poor component selection of the unit that is hardly a startling result. With a current price of ~$49.99, users would be better off taking their cash and setting it on fire rather than buying this unit. There is quite literally no price point or situation where the Diablotek PHD650 should be a consideration for users as it failed almost every test possible today. Retailers and e-tailers should be ashamed to be selling such a product.

even if it was still brand new i would still throught it out of the window.! if something is faulty in your system thats defenately your psu.

That review is based off of a unit that failed in the middle of testing. I've used mine in many different builds, including one with a GTX 680 and one with a Radeon 7950, and I've never had a problem with it.
I'm willing to accept that my PSU is the problem (honestly I'm surprised it hasn't failed yet after so many years of use), I'm just asking if there's a way I can test to be sure so I don't buy a new PSU for nothing.

 

[chris987]

what do you think you have been doing all this time? playing games is putting quite a load on your psu and has been failing during gameplay apparently.! just like a failing test.! testing equipment (which is expensive) would emulate workloads a lot higher than any pc would ever reach but only to be used by proffessionals. a good quality psu unit must always be present on any pc especially when its a gaming machine.! low quality psu end up with such erratic behavior so even there was another problem with your pc it would be hard to determine. buying a quality psu will be the most well spent money.!

 

[FrozenPlasma]

I'm just saying what if I buy a new PSU and it doesn't fix the problem? So far the only thing against my power supply is the fact that is was made by a brand with a bad reputation. I don't actually know if it's causing the issue or not. For all I know, I could have a defective video card.

 

[chris987]

I'm just saying what if I buy a new PSU and it doesn't fix the problem? So far the only thing against my power supply is the fact that is was made by a brand with a bad reputation. I don't actually know if it's causing the issue or not. For all I know, I could have a defective video card.

by experience, the majority of such problems are psu related. a common faulty gpu would produce artifacts, fuzzy image

http://www.tomshardware.co.uk/faq/id-2492424/laymans-simple-guide-solving-graphics-card-issues.html

try your gpu to another system if its faulty will show the same symptoms. seriously though, you are risking your system with such psu. proceed with your own risk , you have been warned.

http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

Tier Five
Avoid IMMEDIATELY. These units are highly unsafe to use. No such protections added, very thin gauge wiring used, false advertising and too much to list. Reference to a higher tiered unit for a better, money saving and a much safer unit. For your safety's sake, please don't order or pick one up for use in your system. These units are a potential fire hazard and could even kill you, let alone your system.


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