No, you cannot use a 2x8 twice.
No, you cannot use a 2x8 twice.
Consider purchasing a 32GB kit or opting for two 8GB units of the same type and speed.
If you have 4 slots then nothing is stopping you from upgrading with more identical DIMMs.
Adding another kit won't guarantee XMP profile compatibility. For instance, with a 3200MHz CL16 unit, you should check stability before assuming full performance. Running it at rated speed might not be possible. Consider lowering the frequency to something like 2933MHz or 2666MHz instead.
Your device has 16GB storage and a 3200MHz processor. The only sure way to confirm is by checking the specifications.
Sounds fine. I’m just planning to purchase a 32GB kit, honestly.
Varies by system configuration. Not every device supports quad channel. This setup works well unless you're concerned about XMP compatibility. Keep in mind that components tested together at rated speeds may not perform identically, and running RAM faster is simpler with two slots compared to four or more.