Problems with bsod

hey everyone, already 3 times bsod shows up.Idk why is this happening, i think this is from the drivers, or ram, im not sure.Here are the dump files:
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BCCode: 4e
BCP1: 0000000000000099
BCP2: 0000000000056A02
BCP3: 0000000000000002
BCP4: 000000000005BE01
Caused by driver:ntoskrnl.exe
Caused by address:ntoskrnl.exe+80640
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BCCode: 1000007e
BCP1: FFFFFFFFC0000005
BCP2: FFFFF880055A1D90
BCP3: FFFFF880039B9668
BCP4: FFFFF880039B8EC0
Caused by driver:igdkmd64.sys
Caused by address:igdkmd64.sys+65afb
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help.