Hi, I am interest in this~

HP ENVY SpectreXT 13-2106TU – 13.3” / i7-3517U / Onboard 4GDDR3 / mSSD128G / Intel HD4000 / W8 : RM3210/-

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Kingston Notebook RAM
Kingston DDR3 1600MHz 4GB - KVR16S11/4G – Lifetime Warranty – RM70

is this Notebook Ram compatible with this HP model? will this void warranty? Can I extend warranty and where to COD? Thanks...