Question troubleshooting gtx 770 pcie connection

speedboat1

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Oct 19, 2016
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hi all,

i've been having some odd intermittent behavior from my rig and i'm trying to track it down. any help greatly appreciated. here are my specs:

  • MOBO: Gigabyte GA-Z87-HD3
  • CPU: i7 4770K 3.5 (liquid cooling)
  • RAM: 4x Corsair LP 8GB DDR4(?)
  • PSU: thermaltake toughpower 750 (brand new)
  • 2x spinning drives, 2x SSDs (system / application drive is brand new)
  • GPU: GTX 770
i'm experiencing a specific type of crash, so far only during gaming. this consists of a screen freeze with immediate loss of peripherals; the USB eject sound follows shortly thereafter. the system keeps running, seemingly unaffected. no interaction is possible though, and i have to hard reset. i suspect the GPU, but mobo also seems a possibility.

clues:
  • temps are normal, both of CPU and GPU -- mid to high 60s, right up to the crash
  • the GPU is sometimes not recognized by device manager when i boot up. i suspect a "sudden eject" of the PCIE connection may be the immediate cause of the crash, because i kept open hardware monitor running after the last crash and the logs continue to record--with the GPU jumping from 60 degrees to 0 (i.e. no readout)
  • i have not experienced this crash with integrated GPU -- though i also don't use it to game
  • perhaps the USB disconnect sound? is it possible this is all caused by a bad USB port or peripheral?
  • event viewer only gives a kernel-power error 41, which is probably caused by my forced restart
things i have tried:
  • replacing PSU (this was also defective -- fan only -- but doesn't seem to have caused the issue)
  • resetting CMOS
  • DDU of nvidia drivers with a clean install
  • removing overclock on CPU and testing with prime95 small fft
  • opening, cleaning, redoing thermal paste, and reseating GPU
  • cleaning the PCIE slot with compressed air
there is a second PCIE slot (2.0), but i'm not sure if using it will help me know if the problem is in the mobo or the card. i do not have another GPU handy to switch out, at least not without buying one. i haven't tested the SSD yet, but it's a brand new samsung, so it seems unlikely.

appreciate your help!
 

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