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Hello, So I have been having this issue for about one month, previously everything was working fine. The PC was purchased less than one year ago and it's still in warranty. GPU came with G5: Nvidia RTX2060 Issue: browsing websites is fine but every time I run some GPU consuming stuff, like video games, GPU tests, PC will turn black screen(monitor will enter sleep mode) and the PC fan will hit 100% screaming like crazy. A hard reboot is needed to bring the PC back. Once rebooted, there is no related system event logs found. Things I have tried: re-installed Windows 10, updated to latest GPU driver, upgraded BIOS, cleaned dust, reseat GPU, etc. I had a support session but the technician didn't really provide much help but told me to try re-install OS. I also tried this GPU in another PC, same issue. I was suspecting a PSU or a GPU failure, now I have installed a new third party PSU+motherbother, the issue still persists. So it is certainly a GPU failure. My question now is: I kind of do not want to re-assemble all the old G5 parts, but the GPU is indeed what came with my purchase. Is this GPU still under warranty if I changed other hardwares? If so,what's the process to get it replaced?
Possible GPU failure, is GPU still covered by warranty if I changed some 
hardwares of my G5