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what is the purpose of reseting VRAM and PRAM?

Twe Foju

Twe Foju

macrumors 6502
Original poster
Dec 20, 2007
396
0
Jakarta
ok so many has suggest if like something is wrong with our hardware, we should do a Apple+Option+P+R Command to reset the PRAM and VRAM

so what is the purpose of it?

and is it safe to run the command for more than once?
 
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