Low performance on Ryzen 1600 / Gtx 1080

I'm lost. I've been having problems with frame drops and low fps in games  for ages and i cant get a solution. 

my specs are : Ryzen 1600 (Oc'd 3.8Ghz) , Gtx 1080 , Trident Z rbg 3200mhz (running at 2933) , 144hz (OC'd to 165hz) 1440p G-sync monitor , games running on SSD. 

One example is League of Legends :
The game starts at 160-150 fps then drops to 100 during lane phase. During intense teamfights it gets to 60-50.  Same exact thing happens to PUBG. 

So far I've done :

•  Lowest possible graphic settings (same exact fps)
• Turn Off V-sync on nvidia panel
• Power settings to maximum performance on Nvidia Panel 
• Ryzen Balanced mode and High performance (tested both nothing happened) 
• Oc'd my CPU and RAM
• Latest drivers on everything 
• Turned SMT off in BIOS 
• Turned Ryzen Quiet setting off

Specifically in League, the one thing that's weird  is that my Gpu has a very low usage % (<30%).  From what I'm seeing people with the same or inferior Systems are getting way more stable fps numbers. Is something bottenecking me ? 

I think I should have a way better performance than the one I'm having now.

Submitted March 29, 2018 at 05:23PM by KaRaNiCk29 https://ift.tt/2pPU8fQ