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I've been fighting system instability for a couple of months now and have tried a lot of different things, so I'll try to be as specific as possible without going into unnecessary details. If I've left something out, I apologize. I finished this build in March after several months of off-and-on tinkering. I purchased an EVGA SuperNOVA 1200P2 since it was what EVGA's Power Meter tool recommended (not very scientific, I know, but whatever... it seemed like enough).<br><br>
My system is as follows:
<ul class="bbcode_list"><li>i7-5960x</li>
<li>64GB (8x8) DDR4-3000</li>
<li>2x 980ti flashed to MaxAir BIOS (1.25v at load; 350W at 100%; 425W at 121%)</li>
<li>Rampage V Extreme</li>
<li>512GB 950 Pro PCIEx4 SSD</li>
<li>2x 1TB 980 EVO SATA SSD</li>
<li>2x 3TB WD Red 5400rpm HDD</li>
<li>Asus Essence STX ii Soundcard</li>
<li>2x D5 Pumps</li>
<li>11x Fans (connected to/controlled by an Aquaero 6)</li>
<li>EVGA SuperNOVA 1200P2</li>
</ul><br>
The first signs of weirdness came when I was filling/bleeding the loop and the power supply would occasionally turn off while jumpered. I didn't think much of it at the time since I was moving the case around a lot to get rid of air bubbles and figured I must have jostled the plug enough to pull it loose.<br><br>
Once the bleeding/filling process was finished, I struggled mightily to get the system fully stable. I never had any issues getting it to power up, but I couldn't ever escape reliability issues. I could get to a "stable" clock that would run Aida64's stress test overnight without fault, only to have it randomly restart (no blue screen or crash message) while watching Netflix, for example, three days later. The next day it would restart while playing a game, then yet again overnight. Sometimes I could narrow a crash down to a particular process from looking through Windows' reliability history, but most of the time the only thing it showed me was the generic "Windows restarted unexpectedly."<br><br>
In the past couple of weeks I've noticed the motherboard "dropping" memory. There are no errors, it just will only detect 4, 6, or 7 of the 8 DIMMS I have installed. I spent the better part of the past week tinkering with voltages and settings to try to get all 8 working, but there doesn't seem to be much rhyme or reason to it. All the sticks work individually and in any combination up to 6, but once I go from 6 to 8, sometimes it detects all 8; other times it only detects 6 or 7. The strangest part (to me, anyway) is that the DIMM(s) that it drops can change from one boot to the next. Right now it may not be detecting B1 and B2; I'll reboot and it won't detect B2 and D2; I'll reboot again and it will pick up all 8.<br><br>
This weekend I finally decided that I needed to suck it up, drain the system, and pull out the CPU to check for bent pens/socket damage. Everything was fine; there was no damage. During the fill/bleed process after re-seating the CPU and putting the loop back together, the PSU shut off a couple of times, just as it had done in March when I filled it the first time. It struck me as more odd this time since I wasn't moving the case around most of the times when it shut down and I'm just more cognizant in general of crashes/power issues with the system. Sometimes I could turn it right back on without any trouble; other times it would either turn right back off or not do anything at all. In those cases it eventually came back on, but only after I let it sit powered down for a few minutes.<br><br>
After an afternoon of leak testing (and fighting with my PSU), I removed the jumper on the 24-pin connector, plugged it into the mobo, and powered up the system (with everything at stock speeds/voltages). Everything seemed fine at first glance: all the memory was detected, temperatures were notably lower (I screwed up the TIM spread when I first built the system, which gave me about a 10C lateral ΔT across the chip), and it passed a quick 15min Aida64 stress test without any problems. Then it restarted. I got back into Windows, opened up the reliability history, and it just showed "Windows did not properly shut down." 5 minutes later, it restarted again. Got back into Windows, opened Chrome, and it did it again. At that point, I just turned everything off, went to bed, and resolved to find out more today.<br><br><b>TLDR - Could all my issues come down to a faulty power supply? I plugged my components into EVGA's PowerMeter this morning and it suggests either a 1050 or 1200W PSU. However when I plugged all my info into Outer Vision's power supply calculator, <a class="bbcode_url" href="http://outervision.com/b/D3p6nE" target="_blank">it suggests that I need 1548W</a>. The fact that it won't stay on when jumpered tells me there's something not right with it regardless, but is a 1200W Platinum unit simply not strong enough to do what I'm asking it to do?</b>
 

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<a class="bbcode_url" href="http://www.overclock.net/t/1598887/why-all-online-psu-calculators-are-wrong-and-is-total-bogus#post_25118372">Why all online PSU calculators are wrong and is total bogus</a><br>
Forget what all those cappy calculators tell you its not right.<br><br>
It sounds like your PSU is broken so do you have a digtal multi meter you can test it with or another PSU you can try.
 

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Discussion Starter #3
<div class="quote-container" data-huddler-embed="/t/1602260/random-crashes-and-restarts-psu-to-blame/0_20#post_25233080" data-huddler-embed-placeholder="false"><span>Quote:</span>
<div class="quote-block">Originally Posted by <strong>shilka</strong> <a href="/t/1602260/random-crashes-and-restarts-psu-to-blame/0_20#post_25233080"><img alt="View Post" class="inlineimg" src="/img/forum/go_quote.gif"></a><br><br><a class="bbcode_url" href="http://www.overclock.net/t/1598887/why-all-online-psu-calculators-are-wrong-and-is-total-bogus#post_25118372">Why all online PSU calculators are wrong and is total bogus</a><br>
Forget what all those cappy calculators tell you its not right.</div>
</div>
This is why I went with EVGA's recommendation over the higher one when I first bought my parts. Broadly speaking, though, is 1200W enough to power everything I have attached to it? My gut is saying yes, but the ongoing problems I've had are making me question myself.
 

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Read the edit i made in my last post.<br>
And if you want to find out how much your system draws you should get a kill a watt.
 

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Discussion Starter #5
I don't have another PSU handy, but I've been looking for an excuse to get a multimeter for a while now. Guess this is it!
 

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Discussion Starter #6
Just to update -- I tested with a multimeter and the 3.3v rail is all over the place. I have a new unit slated to arrive from Newegg this afternoon, so hopefully things should resolve themselves once I plug that in. If not, I guess it's on to testing the motherboard....
 

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The 3,3v rail is what powers your RAM so if that one is all over it explain why your PC is acting up.<br>
Some motherboards also uses the 3,3v rail for the chipset.
 

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Your system could be using close to 1200 but most likely it's something faulty. I pull 1008 watts from the wall with a 5820k and one 980ti. Of course they're both ocd to the max.<br><br><br>
Sent from my iPhone using Tapatalk
 

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1008 watts from the wall is not 1008 watts used by the system as you have to take the efficiency off.<br>
The system power draw was probably closer to 900 watts and its less if you have a monitor and/or other stuff on the same outlet.
 

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Yep always have to account for efficiency! I was just letting OP know it is possible that he is using close to peak wattage since his rig is essentially twice the "size" of mine.<img alt="thumb.gif" class="bbcode_smiley" src="http://files.overclock.net/images/smilies/thumb.gif">
 

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Discussion Starter #11
New power supply arrived Wednesday. I put it in after work and have been running 100% stable ever since. The replacement is 1600W instead of the 1200 that was in there so I'm not completely sure whether the problem was due to the crazy 3.3v rail, running into the PSU's capacity, or both, but in either case the problem appears to have been fixed.
 

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Congrats !! Good to hear!<br><br><br>
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