Question Thermaltake lite power 550w with RX 570 oc

[shihab_rs]

I am using this PSU to run Asus Strix RX 570 oc . but my pc goes slow after I installed on my computer. And while I am gaming Games did not run smoothly it's lagging and shut down suddenly .....

I want to know is this is a PSU problem... do I need to upgrade it.... if yes which Psu give me batter result...

 

[Lutfij]

Please no, don't use that PSU. We will need more info as well. When posting a thread of troubleshooting nature, it's customary to include your full system's specs. List them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: