what happens if i use ram from two company together

graphics756

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May 30, 2014
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I am a mid end gamer, now i have
4 gb ram from hynix but i am unable to find another 4 gb hynix sticks .........
So is there any problem if i use 4 gb ram stick of another company like
g skil or kingston along with my old one...??.....
Will there be any performance problems....??