hi my gpu goes from around 100% usage down to 0 or 1 for a few seconds and stutters. i testes this in unigine valley and the problem was still happening. i have set my power limit to 50% in afterburner but nothing happen. i am suspecting my hardrive may cause this. thanks for any replies. image of my afterburner https://gyazo.com/8ee9d27bdfd882f9f4368ce1cfe52c73
CPU: i5 - 7500
GPU: MSI RX480 8G
HDD: Seagate BarraCuda ST1000DM010 1TB 64MB Cache SATA 6.0Gb/s 3.5"
PSU: Thermaltake TR2 SERIES 650w 80+
MOBO: Asus Prime B250 M - K
RAM: 8gb Kingston value Ram 2133 ddr4
I can't help you with your issue unless you post your full pc specs, it might be the psu failing, so please post your full pc specs(Everything that consumes power, fans, led controller, fan controller, etc.)