Hi,
Let me start with system specs:
Almost two year old system. Never a problem. Rock solid. Not a newbie at building solid systems.
Water cooled: Pump -> GPUs -> 360 Rad -> CPU -> 240 Rad - back to pump.
All 1/2" ID hose. XSPC radiators. Liang 635 pump w/250 res.
Temp sensors on both rads and PWM pump controlled by CPU temp sensor.
Mountain Mod case w/9 fans.
2x GTX 680 2gb SC (820-P4-2684-KR) Watercooled with Koolance blocks & IC Diamond TIM.
Asus P9 X79 WS
Intel i7-3930 2011 OC 4.9ghz Watercooled on EK block with IC Diamond TIM
32GB 2133 RAM (G-Skill)
2x Intel 128 SSD - Raid 0
3x Dell 3014 monitors
Windows 7 Pro 64
Yesterday I started looking at building a mining rig with some 750ti cards.
As an experiment I downloaded CUDAMiner and let it run.
All was good, cards running about 62C and the watercooling was doing it's job.
After a few hours I ran to the store for groceries and stopped to eat.
When I got back about two hours later the screens were black but the system was running.
I tried waking from sleep but no dice. Ended up forcing shut down.
On reboot I had one monitor.
I powered down the system and unplugged from the wall. Let sit for 5 minutes.
Restart, still one monitor. Device manager (show hidden devices) shows one card normal and the second is faded out but no exclamation point.
Installed new NVIDIA driver 377.50, still only one card working.
Clean boot, uninstall drivers, clean install from fresh download. Driver and PhysX only. Still dead.
I'm thinking I burned out one card. Maybe the system tried to sleep, stopped the pump and the water flow. The top card would get the warmest and it's the one that's not working.
Opinions?
Troubleshooting ideas?
I have a third matching card but it's a big hassle to drain the system and install the water block.
Good excuse to upgrade to 780ti's on water??
James