I've built this computer in November of 2014, so I've had it a while.
Starting about 6 months ago, it started randomly rebooting (cold reboot, like reset switch). It only occurred rarely, like maybe once a week, and I just kinda wrote it off as Windows 10 weirdness (since it coincided with about the time I upgraded to that).
It got worse. Lately, it has been as frequent as every 15 minutes under heavy gaming/heavy load. Even idle it'll do it occasionally, maybe once every other day if I leave it awake and idle.
So here is what I have:
Asus Maximus Gene Vii
Asus Strix 980
32G Kingston PC1333 DDR3
i7 4970K
Corsair H100i
Crucial M500 SSD
Toshiba 3TB SATA3
Seasonic Platinum 450RM
Corsair Carbide 240 case
Everything running through an APC RS1500
Nothing overclocked, everything stock/auto in the BIOS
Originally, when I first built the rig, I had a Corsair AX650i, after going through 2 RMAs on bad cables, I replaced it with a smaller Seasonic (there's a thread around here somewhere, I'm not 100% sure but I think it's not terribly relevant).
So, once the reboots got to about the once per day stage, I started to actively troubleshoot it and figured something was up. It was getting worse and all. Since it's a cold reboot I suspect it's a power issue, but can't seem to track it down.
Here's what I've done
First off figured it was PSU, so replaced the 450RM with a 750 SNOW. computer rebooted 15 minutes after the swap, so I returned the 750
Swaped video card with wife's computer (GTX 660) - her computer ran the 980 fine for 3 days under load, mine continued to reboot
Swapped video card to other PCI slot
Updated BIOS
MEMTEST86'ed each DIMM successfully
Rolled back nVidia drivers to 2-3 different versions
Rolled back to WIn8.1 on an older SSD, unplugged the Toshiba to make sure it wasn't a drive issue.
RMAed the motherboard, Asus sent it back 2 weeks later. Rebooted 15 minutes under load after I re-installed that.
Checked all internal wiring, it appears ok. Voltages all look fine. Temps on the CPU get a bit higher than they used to, but all still well within normal ranges (30C idle, 70-80C loaded). GPU temps are fine.
Unhooked the power and reset buttons. Swapped out the power cable. Plugged into a different slot on the UPS.
Asking around on a different forum, one person said they had some luck overvolting their RAM (from 1.50 to 1.60). I tried this, it is more stable, but still not entirely stable. With the RAM overvolted (but not overclocked), it goes from every 15-20 minutes to maybe twice a day. I tried bumping up CPU voltages as well, but that seemed to reduce the stability.
So far, the only thing I haven't been able to check out is the CPU (I don't have another Haswell to stick in there to test it). It passes Prime95 checks (at least as far as it will get before a reboot kills it).
Right now, I have FAH set to Heavy and to come up on reboot and I'm burning it in a bit - hoping that whatever the issue is will either catch on fire or bake itself out.
Anyone have any suggestions? I've tried just about everything I can think of without just writing it off as a gremlin build and punting.
Starting about 6 months ago, it started randomly rebooting (cold reboot, like reset switch). It only occurred rarely, like maybe once a week, and I just kinda wrote it off as Windows 10 weirdness (since it coincided with about the time I upgraded to that).
It got worse. Lately, it has been as frequent as every 15 minutes under heavy gaming/heavy load. Even idle it'll do it occasionally, maybe once every other day if I leave it awake and idle.
So here is what I have:
Asus Maximus Gene Vii
Asus Strix 980
32G Kingston PC1333 DDR3
i7 4970K
Corsair H100i
Crucial M500 SSD
Toshiba 3TB SATA3
Seasonic Platinum 450RM
Corsair Carbide 240 case
Everything running through an APC RS1500
Nothing overclocked, everything stock/auto in the BIOS
Originally, when I first built the rig, I had a Corsair AX650i, after going through 2 RMAs on bad cables, I replaced it with a smaller Seasonic (there's a thread around here somewhere, I'm not 100% sure but I think it's not terribly relevant).
So, once the reboots got to about the once per day stage, I started to actively troubleshoot it and figured something was up. It was getting worse and all. Since it's a cold reboot I suspect it's a power issue, but can't seem to track it down.
Here's what I've done
First off figured it was PSU, so replaced the 450RM with a 750 SNOW. computer rebooted 15 minutes after the swap, so I returned the 750
Swaped video card with wife's computer (GTX 660) - her computer ran the 980 fine for 3 days under load, mine continued to reboot
Swapped video card to other PCI slot
Updated BIOS
MEMTEST86'ed each DIMM successfully
Rolled back nVidia drivers to 2-3 different versions
Rolled back to WIn8.1 on an older SSD, unplugged the Toshiba to make sure it wasn't a drive issue.
RMAed the motherboard, Asus sent it back 2 weeks later. Rebooted 15 minutes under load after I re-installed that.
Checked all internal wiring, it appears ok. Voltages all look fine. Temps on the CPU get a bit higher than they used to, but all still well within normal ranges (30C idle, 70-80C loaded). GPU temps are fine.
Unhooked the power and reset buttons. Swapped out the power cable. Plugged into a different slot on the UPS.
Asking around on a different forum, one person said they had some luck overvolting their RAM (from 1.50 to 1.60). I tried this, it is more stable, but still not entirely stable. With the RAM overvolted (but not overclocked), it goes from every 15-20 minutes to maybe twice a day. I tried bumping up CPU voltages as well, but that seemed to reduce the stability.
So far, the only thing I haven't been able to check out is the CPU (I don't have another Haswell to stick in there to test it). It passes Prime95 checks (at least as far as it will get before a reboot kills it).
Right now, I have FAH set to Heavy and to come up on reboot and I'm burning it in a bit - hoping that whatever the issue is will either catch on fire or bake itself out.
Anyone have any suggestions? I've tried just about everything I can think of without just writing it off as a gremlin build and punting.