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First time I've messed with a pc since university in 2001.  Lets just say Im learning a ton.   I bought a msi z270 sli plus, Celeron processor, 1200w and 850w psu, I acquired at random 4 1060's and a 1070, risers, 6pin extenders to power risers, 4gb ram ddr4, power switch, 2;1 mobo connector, windows 10 home, a monitor, mouse and keyboard.
  I took my time and acquired stuff for cheap on craigslist and open box etc... Its been a challenge finding everything. Its kinda fun problem solving but I'm at a loss for solving how to get all 5 cards running without blue screen restarts and then black screen freezes.  Right now im running 4 cards on NiceHash legacy and it hasn't crashed in 24 hours.  But I want to get 6 cards running.  once I can get everything stable I want to use hiveos, ethos or some other miner but I want to figure out the hardware first.
 To start I couldn't get the bios to see gpu so after several other mobo's another psu later I bought a different cpu(i5 7600k) and put in in socket and boom I could see gpu.  I had already installed windows trying every possible option trying to get Celeron to see gpu.   Set bios to igd, then I loaded drivers.  I flashed to newest bios; enabled 4g,  96 latency, power last state, left it in auto and tried gen 2etc....   then in windows set no password at login, adjusted virtual memory, turned off windows update, put never sleep, had performance power but went back to balanced set NiceHash miner 2 to startup menu.  after many crashes I changed to legacy with no help there.  while loading some disc from mobo I accidentally installed Norton.  that was a nightmare and I had to do a clean install to remove it, lol.  so I do have a clean install of newest windows 10 and clean install on Nvidia drivers.
  When I have all 5 cards the windows won't even do a lot of things like boot usb from safe mode so if I remove the cards I can get it to function.  main problem is at random get blackscreen and have to button power down,
I've tried a lot of settings and read a bunch of forum but appreciate any tips.  I have one single fan 1060 6gb that was running at 82 degrees,  thats the one I have removed but am going to put it in place of another to see if maybe it was the culprit, probably not tho cause it ran ok when it was just the second card I owned.

  

ok I plugged my suspected bad (because in ran at 82 degrees) gtx 1060 back in to pcie where a good card was and my pc crashed within an hour.  Is it possible for a card to crash windows? Or just coincidence that it ran 24 hrs then crashed with that card.  I also bought that card on craigslist which always ends with technological failure in my experience, lol.

You found one gtx 1060 take bluescreen.

Hi,

A card may crash windows yes if the error is propagated to driver (kernel level).
You can try to disable the automatic reboot on error detection of windows 10

First, should you maybe try this nvidia GPU alone on an other computer to check if something is really broken with it.

It is more likely a compatibility issue with other GPUs or an other systems' part/software.

Also, I suggest you :
 - to check if your mobo has a mining edition bios available (MSI released mining bios for some platforms).
 - disable fast boot, standby and auto updates in windows 10
 - keep 4G decoding enabled
 - Gen 1 or Auto selection are often working pretty well
 - Check power consumption in HWInfo and at wall
 - maybe invest into a hardware usb watchdog (cheap on ebay)
 - try to get same GPUs (same batch ideally) on each rig

Hope you could solve your problem.

amazing the op did not get the info yet, you trolls never give the info people want, you trolls go around spreading nonsense.

The bad gpu will only crash windows if is the boot gpu. If is not the boot gpu then it might start mining and then will crash itself and you will need to reboot your system for that card to work again.

ok thank you metroid

Yes, one bad card will take down the entire pile of cards.   ;D

Well it’s seems I’m getting opposing opinions, however without that one 1060 card my miner stayed online for the last three days.  Evga gave me Rma and I’ll sell it for a more similar card.And thankyou for info rigproxy.com I’m researching a usb watchdog, seems worth the money.

In my own experience, a typical bad card will end up crashing the system or freeze the OS.
Either of the two, the problem will always results in a crash. No BSOD.
If you can connect a monitor to the GPU, sometimes a bad GPU displays weird color patters or lines, some has fast heating problems.
No, Bluescreen of Death is mostly caused by a software error or incompatible driver. Some from a short.

Well I acquired 2 more 1070’s and sure enough it’s crash city again so not a bad card after all.  I had it freeze so bad that my bios were gone, only black screen from windows.  I pulled the battery off board and removed all but one card and got it to boot bios and I readjusted setting and plugged one card at a time in until all cards in device manager.  This took a lot of restarting and my mouse wouldn’t work so I had to do some hard shutdowns.   I updated windows then disabled auto updates.   I now have some mini ip error 56 but things seem to be going fine after several hours.   I’m hoping by disabling igd and plugging into first card and disabling audio in bios may help.🤞🏻🤞🏻

Keep at it fella. It will work. Also, as you've just learned (I did too) it is very rarely hardware that's the issue in a Windows rig. Must happen sometimes, but I've convinced myself several times that a rise or a gpu is 'bad' only to have it work perfectly a few weeks later.

99% of the issues I've had is with varying bios settings from board to board (eg: asrock must use gpus as video output if any installed, gigabyte the opposite), and driver installation feckery. Anyway, enjoy the swearing!!

Depends on what is wrong with the GPU, most commonly a bad GPU won't even let Windows boot at all but SOMETIMES it's only sorta-bad and CAN crash Windows.

MOST blue screens are software issues but not always - a GPU that is overclocked a LITTLE too high can cause a bluescreen once it warms up enough.

to answer OP's topic, yes, it wont even boot.

best is to test each gpu 1 by 1 & see if it would boot win then only proceed to other diagnostics.