Question Low FPS in League of Legends

Jul 12, 2020
Hi everyone, I just built a new PC with mid-tier specs and it isn't performing much better than my old one on specific games -- League of Legends in particular. I've done all the standard troubleshooting, all my drivers seem to be up to date, I can run other games pretty well, but I can't get my LoL FPS higher than around 90. When I first spawn in, I'll get around 150 but as soon as another player is on the screen it will drop to between 60 and 100. Looking at only benchmarks of my hardware, it looks like I should be getting an average of 300, so I don't really understand the discrepancy. Any help is greatly appreciated.

AMD Ryzen 5 1600 (12nm) 3.2 GHz 6-Core Processor
MSI B450M PRO-VDH MAX Micro ATX AM4 Motherboard
Gigabyte GeForce GTX 1650 SUPER 4 GB WINDFORCE OC Video Card
Corsair CV 650 W 80+ Bronze Certified ATX Power Supply
Corsair 16 GB (2 x 8 GB) DDR4-3000 CL16 Memory