MOBO boot-loop caused by GPU + PSU with not enough wattage??

rukiakuchiki

Honorable
Jun 15, 2017
5
0
10,510
Hello!

First of all I apologize if there's a similar thread like this, but I have heard this forum has good answers and I have no other place to turn to.

So, let me describe the problem I currently have: For starters I should mention, that I bought this computer ( all components separately ) towards the end of 2014. The computer worked perfectly, up until about 2 months ago, when it started boot-looping. At first it did it a couple of times a week, after that it started to get more frequent. Sometimes it boot looped only 3 times, sometimes for 15 times and sometimes -for periods of 3 days in a row- it didn't boot loop at all, the computer booted on the 1st try.
Once the computer booted successfully it ran fine without any problems at all. It gave no errors at all, no BSODs, no malfunctioning peripherals, no random reboots, nothing. Software related problems and viruses are also ruled out.

I asked around and read a few forum topics on what could cause this and it came down to two things: either PSU or MOBO. So I assumed PSUs are mostly responsible for this kind of thing, so I borrowed and tried booting with a different PSU ( mine is 600W the one I tried it with was 550W ) but it still did the looping. I then removed the GPU and just tried to start it with the onboard one, no luck. Then I slowly removed everything, but the problem still persisted, so I came to the conclusion that the MOBO must be at fault.

I took the computer to a repair shop and they confirmed that the MOBO was in fact the cuplrit, but not because it had problems on it's own, but because the PSUs wattage wasn't enough and the MOBO was forced to make the computer work.

To quote the guy at the repair shop: "The MOBO went bad because of the GPUs extensive usage ( I use my computer 90% for gaming ) and because the wattage wasn't enough, the GPU forced the MOBO to boot and thus it went bad" - so that's what he said more or less...oh, and he also said that I would need a PSU with more wattage. ( at least 750W )

I'm not an expert on this part, so I thought I'd ask people more experienced than myself: Can a GPU with a high load and a PSU with not enough wattage cause a MOBO to malfunction or even cause permanent damage beyond repair? Is my current PSU not strong enough for my build? I really need a PSU with bigger wattage, or that's not the case?

For more information, my specs are:

CPU: Intel - Core i7-4790K 4.0GHz Quad-Core Processor
CPU Cooler: Cooler Master - Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
MOBO: Gigabyte - GA-Z97X-SLI ATX LGA1150 Motherboard
Storage: Seagate - Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ( 2 pieces )
Corsair - Force LS 60GB 2.5" Solid State Drive ( 1 piece )
Memory: Kingston - HyperX Fury Red 8GB (1 x 8GB) DDR3-1866 Memory ( 2 pieces )
GPU: Gigabyte - GeForce GTX 970 4GB G1 Gaming Video Card
Case: Corsair - SPEC-03 Red ATX Mid Tower Case
PSU: Corsair - CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply
Windows: Windows 8.1
Peripherals: Asus Cerberus keyboard and mouse
Optical drive: LG - GH24NS95 DVD/CD Writer

( I should also mention my MOBOs BIOS wasn't flashed or anything, because it still has warranty and it was sent back to the company for repairs and they sent it back saying they fixed the problem. Now I have to wait and see if it's true when the whole thing gets assembled )

So in light of all this, if anyone could please tell me whether I need a bigger PSU for my rig or not, I'd be grateful, since I wouldn't like to buy a new one unless really necessary.

Thank you so much for the answers!!


 
Power supply for GeForce GTX 970 is 500 watts or greater.

Core i7-4790K supported memory: DDR3-1333, DDR3-1600

You should be running a mild CPU overclock to run 1866MHz memory.

If you are using memory modules purchased as singles instead of two modules in a kit, that may also contribute to poor performance. You can check for faulty memory with:
http://www.memtest86.com/
 

daniel_542

Reputable
Jun 10, 2017
183
3
4,715
Basic calculations put your system's MINIMUM wattage requirements at 479W (www.coolermaster.com/power-supply-calculator).
Add on an extra 20% for safety 575W

So basically - I would recommend 600W MINIMUM PSU for your system but if you want room to expand your system in the future then a 750W is a good idea.

Plus, a 750W will run cooler in your system making the fan quieter and so your PC wont make as much noise with its fans when it is running.
 

rukiakuchiki

Honorable
Jun 15, 2017
5
0
10,510
Thank you very much for the reply guys :)

I went ahead and swapped out my 600W PSU for a 700W one...However, my problems described above haven't been solved since when I first made this post...

A failed repair of my MOBO and 2 new MOBOs later I'm back where I started...

Since my initial post I sent back my MOBO for repairs to the place where we originally bought it. After almost 3 weeks of keeping me in the dark the website gave me a refund because apparently they couldn't fix it.I wasn't sure what to get so I contacted the tech guy ( who initially checked my computer) to choose a decent MOBO for me.
The only decent one he could find was an ASUS B85 Plus ( Every single website in my country was out on the Z97 type...) I had my doubts cause I checked it with my current build ( on PCpartpicker ) and it said that there are some incompatibility issues with my CPU; to be more specific: "Some Intel B85 chipset motherboards may need a BIOS update prior to using Haswell Refresh CPUs. Upgrading the BIOS may require a different CPU that is supported by older BIOS revisions."
However he assured me everything was fine and I had absolutely no other choice but to trust him.
So, the new MOBO arrived, we took it to his shop he assembled the computer and contacted me saying all was working fine.

So I took my computer home and indeed it was working...finally what a relief...NOT! The next day I tried to reinstall Windows, when I restarted the whole thing, everything inside the case was running, however the display went dark, didn't hear the single beep, the LEDs from the mouse and keyboard weren't working and I couldn' even get into BIOS.
Naturally I got very upset after a month of hassle so I contacted the tech guy about what to do. He said I should try and remove the battery from the MOBO and if it doesn't work I should bring the computer back to him on Monday.
When I removed the battery it did boot after a few tries and once it booted everything worked fine. I even tested some of my games and they all worked like a charm. So anyways after all of this I left the computer on for the whole weekend cause I wasn't sure if I shut it down it would boot again.

On Monday I took the computer to the tech guy, described the problem and observances in detail and hoped it would be child's play to him to fix this mess. Apparently I was wrong. He couldn't do anything with it for 2 days so I went ahead and looked for some compatible MOBOs on the net, maybe there existed chance I could find one. I was in luck since a guy was selling a "Z97X Gaming 3" brand new, apparently it wasn't good enough for his kid...

So, naturally I immediately bought that one. Indeed it was brand new, everything was unopened, nothing was missing. So I rushed over to the tech shop and they said it will be assembled shortly.
Naturally I was so happy that I can finally put all of this behind me, but unfortunately my happiness was very short lived.
The tech guy contacted me and told me the computer does the same boot-loop as first time...and this time he told me, the fault could be with the CPU.

Now I don't even know what to think or do anymore...I'm so confused and hopeless...

I know asking this is like finding a needle in a haystack, but is there any way to see if the CPU is indeed at fault ( I don't know anyone who has LGA 1150 processor, so I can't check it that way ) or is there any other thing that might cause this damned boot-loop? :(

So to recap: My 600W PSU was swapped for a new 700W one; my MOBO was changed twice, first for an ASUS B85 Plus and then for a Z97X Gaming 3. Everything else is the same.

CPU: Intel - Core i7-4790K 4.0GHz Quad-Core Processor
CPU Cooler: Cooler Master - Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Storage: Seagate - Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ( 2 pieces )
Corsair - Force LS 60GB 2.5" Solid State Drive ( 1 piece )
Memory: Kingston - HyperX Fury Red 8GB (1 x 8GB) DDR3-1866 Memory ( 2 pieces )
GPU: Gigabyte - GeForce GTX 970 4GB G1 Gaming Video Card
Case: Corsair - SPEC-03 Red ATX Mid Tower Case
Windows: Windows 8.1
Peripherals: Asus Cerberus keyboard and mouse
Optical drive: LG - GH24NS95 DVD/CD Writer

Again, thanks for any reply in advance, I really appreciate it :)