Upgrade parts compatibility

[Kq]

Keeping it simple, I am looking to upgrade my ram and would like to go with DDR4, but I would need a new motherboard to do so. I am having slowdown on basic games (ie: terraria runs at 40fps) and with a gtx-1080 this is an issue I shouldn't be having.
I would like to know if I swapped out my Mobo and Ram with these would everything be compatable, and most importantly would it solve my frame issues?
Ram / Motherboard
When running games, Task Manager shows my memory is usually between 70-85% with chrome open with gpu, disk, ect are <20%; that's why I'm assuming ram is the issue.

Specs:
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor
CPU Cooler: CRYORIG H7 49.0 CFM CPU Cooler
Motherboard: Gigabyte GA-Z97X-Gaming 3 ATX LGA1150 Motherboard
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1866 Memory
Storage: PNY Optima 240GB 2.5" Solid State Drive
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA GTX-1080 FTW
Case: NZXT Phantom 530 (Red) ATX Full Tower Case
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply
Operating System: Microsoft Windows 10 Home OEM (64-bit)
Monitor: Dell s2716dg 1440

 

[Snipergod87]

So you will be looking at a decent investment as you will need a new CPU+RAM+Motherboard. There won't be any noticeable upgrade in moving from DDR3 to DDR4, what you should be looking at instead is upgrading to 16GB of DDR3 RAM.

 

[Bob125484]

I think you should add 8G DDR3 to your system. Your mobo does not support DDR4.

 

[Kq]

So you will be looking at a decent investment as you will need a new CPU+RAM+Motherboard. There won't be any noticeable upgrade in moving from DDR3 to DDR4, what you should be looking at instead is upgrading to 16GB of DDR3 RAM.

What ddr3 ram would you recommend then? Would it be ok to get 2 more Corsair Vengeance DDR3-1866, or is mixing old and new ram considered a bad thing?

 

[Snipergod87]

Mixing is always hit or miss, I would get the same type you have now if you can though.

 

[Kq]

Mixing is always hit or miss, I would get the same type you have now if you can though.

Ok I will do that then. Thank you for the quick reply, It's much appreciated!