New Build Issue - Is it my Power supply?

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G

giger

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Dec 7, 2006
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Just finished building a new PC. Haven't done so in years but have experience. Things change so here's where I'm at and I'd love anyones opinion on the issue I'm seeing.

CPU - I7 6850K
Cooler - Corsair Hydro Series H80i v2
Power- Corsair RM850i
MOBO - Asus X990-A II
Memory 16gbs (4x4) Patriot Viper Xtreme
SSD - Samsung 850pro (512gb)
Video - EVGA GTX 1080 SC

The build went smooth. Immediate boot to bios but then a warning about the CPU fan not being detected. Did my research and found that people were disabling the notice as it won't detect the CPU fan due to the liquid cool config. Install windows, software for all devices and we boot up cleanly. I keep an eye on CPU temps (with and without load) and It runs at 22C to 33C. So I'm not worried.

Hook up my Oculus Rift (reason for the new build) and everything is smooth and wow the graphics are great! Download Doom and Fallout 4 and run a test of each to see everything in beautiful ULTRA mode. FPS is smooth and I'm loving it.

So I settle in and begin a full game of Doom and about 8 minutes in monitor goes blank. Checking my HDMI cable to make sure it isn't dislodged I see that the PC is powering up and powering down. Digital indicator on the MOBO flashes 00 and goes off. Fans spin up and spin down on everything and repeat. I kill the power-supply and check connectors to see if I knocked something loose. Try again and we boot up just fine. Put oculus on and try a simple simulator or two and about 8 minutes in I see darkness.

Same thing. Power up for a about 4 seconds and then shuts down. No indicators on the board to tell me what the issue is.

So I feel the top of the graphics card and it's pretty hot. Never had a card this good so I get on the internet and see what temps are supposed to be on this thing since I'm curious if it's overheating. I get a thermal (laser) reader and it's right at about 39C. Seems pretty normal.
I try booting again and now it just goes into that same loop. Won't restart.

I yank the graphics card and then try booting. Power cycling is the same. Disconnect the HDD and try. Same thing.

I pull everything and make sure that all connectors are in snuggly. 24 pin to board is in, 8 pin is in, 4 pin is in. Graphics card has its 8 pin in. All leading to correct spots on the power-supply.

No funny smells, nothing. When it works it works awesomely but it keeps dropping out on me.

Think its the power-supply? As there something else I can try?

Oh and the case has no speaker for beeps.

Thanks for your help! It's been a while but it's good to be back!

 
Solution
Chicano
The 4 pin CPU connector is supposed to be necessary only if you overclock.. and though it's said to do no harm being connected, who knows if it will in the long run. It would be best to read the motherboard PDF manual* to see what it says about it... and if it doesn't specify, better disconnect it if you're not overclocking... at normal clock speeds, the CPU should not need more power than what the 8 pin connector provides.

On the restarts and boot lops, yes those symptoms can be caused by a weak PSU... it probably catched on after rebooting repeatedly because the restarts charged the capacitors enough to achieve a successfull boot. So, if the new PSU has made the system work normally, it should remain that way...


*You can download...
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Th3pwn3r

Th3pwn3r

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Aug 29, 2011
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Have you tried re-seating your ram? Try different ram configurations(one stick, two stick, channel 1, channel 2, etc) and see what happens. Do you have any other parts you can use for testing?
 
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G

giger

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Dec 7, 2006
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working on your suggestions. I think I have an older Corsair 750 in another PC. Will test that as well. Also looking

Just realized I plugged the CPU fan into the h amp fan on the motherboard. Doubt that was the issue but now it does see the CPU fan.

I've gone through each memory stick in multi configs and it still shuts down. It's puzzling because when it works it works well but then it just shuts down.

It doesn't under normal load. The PC was installing software through the night and it had to have taken 6 hours to complete. I wake to find the PC running fine and notifications that all are installed/updated.

When I do anything graphic related is when it has the issue.

 
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Chicano

Chicano

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Aug 29, 2011
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Clear this up for me...

Where you say: "Same thing. Power up for a about 4 seconds and then shuts down. No indicators on the board to tell me what the issue is"
And: "I try booting again and now it just goes into that same loop. Won't restart."

By that you are talking about the monitor only right?.

If yes it's the monitor only and temp makes no difference, and since you said it was updating for six hour, and that the issue happens only when you do graphic related tasks, my guess it that the GPU driver may need updating, and maybe also the motherboard drivers if you haven't installed them from the motherboard disk or from the motherboard product page downloads > drivers,.. that's what you need to do next.

The notification that tells you all updates are installed, is referring to Windows updates, but you have to manually update hardware drivers, specially the motherboard and graphics card drivers. The motherboard and many graphics cards can work with Windows default drivers but you need to use those that the motherboard manufacturer, and the graphics card manufacturer provide, and for best graphics, install even the monitor specific brand and model driver.

The HAMP (High Amperage Fan) header is appropriate for the Water / Liquid CPU Cooler fan as it provides better amperage for more efficient CPU cooling.
http://www.howtogeek.com/272215/in-the-context-of-computer-fans-what-does-hamp-mean/


Download the GPU driver from either link
http://www.evga.com/support/download/
http://www.geforce.com/drivers/results/113448

Software for fan speed / temp
http://www.evga.com/software/
 
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G

giger

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Dec 7, 2006
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Chicano, thanks for the response. I was refering to all of the actual updates to the drivers and software that came as default (Motherboard, etc).

When it powers down, it's actually all of the PC. The loop is at that point. For a split second all fans and lights come on and then go right back off. It will do this until I flip the switch on the power supply. Depending on how its 'feeling' at that point, I can turn it back on and it will boot right up.

I did go back to frys and buy another power supply and am testing it right now as all other suggestions were run through and I was still getting the same results.

One question I didn't specifcally ask and that is completely new to me with this built. The MOBO instructions say to connect all power connectors to the motherboard. However it doesn't specifically state it where it's obvious that I need to connect both the 8 pin and the 4 pin cables. Previous builds only had a 24 pin connector and a 8 pin. This has 24, 8 and 4.

Connecting all is correct?

I'm about to run some stress on this thing and see if it's the power supply.

Thanks for the help!
 
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G

giger

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Dec 7, 2006
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Prime95 and GPUtest running for last 45mins and temps on CPU are at 53c. GPU is at at 63c. Ambient temps is 69F.

Ran through about 15 minutes of doom on ultra and fallout 4.

So far so good! I'm thinking it was the power supply but will continue to test. Will plug in oculus and see what it does.

Wish me luck!

 
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Chicano

Chicano

Judicious
Aug 29, 2011
5,071
29
35,490
The 4 pin CPU connector is supposed to be necessary only if you overclock.. and though it's said to do no harm being connected, who knows if it will in the long run. It would be best to read the motherboard PDF manual* to see what it says about it... and if it doesn't specify, better disconnect it if you're not overclocking... at normal clock speeds, the CPU should not need more power than what the 8 pin connector provides.

On the restarts and boot lops, yes those symptoms can be caused by a weak PSU... it probably catched on after rebooting repeatedly because the restarts charged the capacitors enough to achieve a successfull boot. So, if the new PSU has made the system work normally, it should remain that way...


*You can download the PDF manual from the motherboard product page > Support > Downloads
https://www.asus.com/Motherboards/X99-A-II/HelpDesk_Manual/
 
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Solution
G

giger

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Dec 7, 2006
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I've been stable now since yesterday and have run it through all kinds of stress tests.

It was obviously the power supply.

Thanks again to everyone for helping me work through this!
 
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