[SOLVED] can someone inform me? (upgrading motherboard on prebuilt)

[3621]

(Let me preface this by saying I don't know much about computers) I'm going to be upgrading my prebuilt PC (Acer Predator G3-605) pretty soon. I'll be getting the AMD Ryzen 5 3600X CPU, so I'll need a new motherboard. Will the GIGABYTE B450M DS3H V2 motherboard fit in my current computer? Is it going to be a huge procedure to replace? Also, will I need to get new RAM? I know that if I upgrade my motherboard I'll have to get a fresh install of windows, so can some good samaritan tell me step by step on how to backup/save all of my files? Thank you!

 

[USAFRet]

What specific CPU is in it now?

 

[3621]

What specific CPU is in it now?

I believe my current motherboard is the "ASUS LGA 1150 Intel B85 Express USB 3.0 Intel Motherboard Model B85M-E". 90% sure, that's what it says on the website for the prebuilt PC. As for the CPU, it's an Intel i7-4770

 

[USAFRet]

I believe my current motherboard is the "ASUS LGA 1150 Intel B85 Express USB 3.0 Intel Motherboard Model B85M-E". 90% sure, that's what it says on the website for the prebuilt PC. As for the CPU, it's an Intel i7-4770

Appears to be standard microATX.
So yes, that gigabyte board should fit no problem.