[記憶體] i5 加Ram問題

CPU I5 2400
OS WIN 7 64BIT
RAM 1333 2 X 2GB
DISPLAY GT650

FOR AUTOCAD , WATCH MOVIE

想換 DDR3 1600 8GB x2  OR UPGRADE 4690  

Have any suggest ??

一條8GB都夠用

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really ....!
Thanks  c hing !

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