Computer freezes and screen goes white / yellow

[fa211]

Hello, components are almost 2 years old, so far everything worked fine until few days ago. I need some help to find where is the problem.



Components:


MBO: Asrock x99x killer

CPU: i7-5820k

GPU: GTX 980 ti

Ram: 4 x Crucial Ballistix DDR4 8GB

CPU cooler: Corsair H100i

PSU: Corsair RM850





Symptoms:


- PC freezing under no or minimal load. Screen goes white or yellow and sometimes sound keeps going for 7 sec.

- Manual restart is necessary.

- I did notice that right after restart, PC will freeze again in first 10 sec after login and it will keep freezing until I turnoff PC and wait for few minutes (I tested this few times, after initial freezing I was restarting PC two more times).

- Only few times when PC freezes screen went black, no signal.

- It happens on SSD with Windows 10 and on HHD with Ubuntu.



Facts:


- There is no logs in Windows and Ubuntu about problem

- I tested RAM one by one and with Memtest

- I cleared CMOS

- Its not overclocked

- Latest drivers

- Temperatures are stable

- No dust

- Sometimes 12v rail during some gaming drops to 11.5V

- I replaced GPU with Radeon R5 230 and seems that it works fine.

- I tested GTX 980 ti in another system and seems that it works fine.



I don't have access to another:

- compatible MBO or CPU.

- PSU which can power this system.

- GPU with similar power requirements

 

[Satan-IR]

Happening on Windows and Linux makes a driver conflict at kernel level or hardware level very unlikely.

It sounds like a PSU problem. Turn off/shut down the PC, flip PSU switch off, or better yet unplug it from outlet, plug in, flip switch on and see if PC starts with no problem or lag or anything like that.

Do it a few times and if it starts OK after every complete turn off, it's probably a bad or failing PSU.

 

[fa211]

Thank you for reply, I tried it and still same problem. In meantime crashes became more often. I did more testing with GPU, also in another system and now it crashes there too. Seems like there is problem with GPU. Its still necessary to do more tests to exclude possibility that there is problems with other components too.

 

[Satan-IR]

If that's the case if you can get hands on a spare you can put another GPU in this case/system and try with that for a while.

If the other system just started crashing because you added the 980 Ti to it yes it can be a faulty one or one that's about to die.

I didn't say test without GPU using motherboard because that CPU has no IG and even if it did it wouldn't have made up for that GPU in terms of power draw under load.

BTW have you monitored temps in the system? That is a performance closed-loop cooler but the slight drawback with them is that there is no air flow on the VRM heat sinks in the cabinet as it is the case with traditional air coolers.

Sometimes weird behavior of system under load is due to high temps esp. in chipset and VRM parts unless you have good ventilation inside the case.

 

[fa211]

I don't have another similar GPU but I replaced it with Radeon R5 230 and seems that it works fine. Temperatures are good.