16GB vs 32GB 4000 mhz ram

[Super panda]

Hi

I already have 16 GB (2x8) of G.skill trident Z 4133 Mhz ram in my pc but my friend offerd me another 16(2x8) gb ram of trident Z 4000 Mhz for a cheap price but I'm not sure if I should take it or not , my questions are :

1. Would my 16GB old 4133 Mhz trident Z work together with the new 16GB 4000 Mhz trident z from my friend ?  

2. Can I set the frequency of both to 4133 Mhz ? 

3. Is there any benefits with 32 GB of ram ? Would it help with performance in gaming if the gpu is not bottlenecked ? I mostly play games at 4K ultra settings but there are a few games where I like to be competetive and get the most fps possible.

My specs right now :

MSI Tomshwak Z390

i7 9700K @ 5.0 Ghz

16 GB of ram Trident Z @4133 mhz (right now)

RTX 2080 Ti 

1TB M.2 970 EVO SSD 

[Caennanu]

4 minutes ago, Nima123 said:

1. Would my 16GB old 4133 Mhz trident Z work together with the new 16GB 4000 Mhz trident z from my friend ?  

Yes

4 minutes ago, Nima123 said:

2. Can I set the frequency of both to 4133 Mhz ?

Yes, but its considered overclocking. And as always, with overclocking you risk it not working. So yeah you can set it to this, but it MIGHT not work

5 minutes ago, Nima123 said:

3. Is there any benefits with 32 GB of ram ?

Not really, unless you play unoptimized games, early acces etc. generally 16gb is more than enough for gaming.