Nvida driver issue

I installed nvidia 450 proprietary . My laptop got Frozen and having black dots .then I tried other proprietaries , still it same please help
My laptop specs
Nvidia GeForce 840 m 4 gb graphics
8 gb ram DDR3 hdd

Have you tried driver 390? Your card may not be supported in the newer drivers.

for list of supported cards (don't download):
https://www.nvidia.com/Download/driverResults.aspx/177153/en-us

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