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RAM and HDD are both user replaceable, so will defiantly NOT void warranty, removing other items (battery) will on the other hand void it.
 
You should be good to go. Great choices by the way, I love my Crucial RAM it's been great to me and I heard a lot of great things about the HD.
 
You should be good to go. Great choices by the way, I love my Crucial RAM it's been great to me and I heard a lot of great things about the HD.

Yes, it is definitely going to turn my MBP into a powerhouse. Any suggestions for preserving battery life? Discharge daily or not?
 
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