Question Can I upgrade to 16gb from 8bg of RAM I have 2 sticks right now.

Dec 20, 2019
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I have heard that it can be worse rather than better to upgrade my RAM especially with 4 sticks but, I do have the exact same sticks from when my brother and I ordered our PCS. Since he doesn't use his anymore so I was thinking I could just take his RAM and upgrade but I want as much information as possible and outcomes. Thoughts?