Should I buy dual channel memory or upgrade to a 8th gen i5?

[MADMINK]

This year, I have been noticing that my rig is having trouble reaching a consistent 120 fps for my 144hz monitor( my AOC g2460pqu and windows 10 don't mesh together). I play overwatch, world of tanks, starwars battlefront 2, and Fortnite. Take manager sas that my cpu varies from 78 to mid 90s usage while my gpu is at 40 to mid 90s for the first three titles. My CPU feels like a bottleneck, but some tell me that my single channel ddr4 ram @ 2400mhz is hampering. 

Should I fill a piggy bank and buy a newer 8th gen i5 later next year or save money and buy a 2x 8gb RAM to activatedual channel to have 128 bit speed? I've seen a comparison video of someone playing overwatch using single channel and dual with drastically different results favorin the dual channel side (a 30 to 40 fps boost). Plus his Setup is nearly identical to mine. The video was made by Wolfgang if you're interested.

Thanks for reading.

[hconverse02]

What is your setup? We need your actual specs first before deciding which isn't powerful enough

[LukeSavenije]

what cpu, gpu and mobo do you have?

[MADMINK]

15 minutes ago, hconverse02 said:

What is your setup? We need your actual specs first before deciding which isn't powerful enough

RX 480 8gb 68 to 78 c on full load

I5 6420p w stock cooler

1x 8b DDR4 RAM

1TB HDD half full

600w PSU

Windows 10 pro

All drivers up to date AMD and windows

B150m pro d motherboard

PC runs silent and cool

Note that I also disabled superfetch, removed bloat ware, and have no malaware.

 

[hconverse02]

2 minutes ago, MADMINK said:

RX 480 8gb 68 to 78 c on full load

I5 6420p w stock cooler

1x 8b DDR4 RAM

1TB HDD half full

600w PSU

Windows 10 pro

All drivers up to date AMD and windows

B150m pro d motherboard

PC runs silent and cool

 

Yeah your cpu is kinda bad, but upgrading it might not give you 60 more frames, but I'd be more efficient and probably stutter less

[MADMINK]

Just now, hconverse02 said:

Yeah your cpu is kinda bad, but upgrading it might not give you 60 more frames, but I'd be more efficient and probably stutter less

Is the gain worth 250 dollars or should I get dual channel memory?

[MADMINK]

20 minutes ago, LukeSavenije said:

what cpu, gpu and mobo do you have?

I responded to the golden retriever about the specs. Sorry I did not see yours. I would have done a general comment.