Are you running on stock settings? Uninstall the card under Hardware/Device Manager and on reboot cancel the Windows Driver Install Prompt and instead go to your Nvidia folder and run the driver setup.
what does it say on the BSOD? if its genral one it would say go and check your BIOS or try another graphics adpater etc. it may not be the graphics card itself, but if the BSODs not helping go for the gpu first like hundredISlandboy suggested and install Nvidas offical drivers from thier webiste rembering to do a "clean" install so leave nothing behinded of the old drivers, suing driver sweeper. than tell us if it has worked or not
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