Long story short I have stuttering issue after adrenaline update and don't know why. After some research I found that my memory clock drop 2000MHz to 625MHz suddenly while playing game and that causes stuttering. Here's some stuff that I did:
1-) Disable HPET
2-) Update Windows to build 16299.248
3-) Disable ULPS
4-) Uninstall Afterburner
5-) Change power settings to high performance.
Here's my system specs:
Driver Version:18.2.3
GPU: Gigabyte RX560
CPU:Intel I5-6600
RAM:8GB DDR4 2133MHz
MOBO:MSI H170A Gaming pro
PSU:Corsair VS650
Monitor: Viewsonic XG2401
OS:Windows 10 PRO 64bit
Here's wattman screenshot: