Gran Turismo 4 Fps Low

PS2 - GT4, plays @ 100% on my Odin. But whenever I play a track, at night, or a course when the sun glare shows, my emulation slows down, by like 20

Gran Turismo 7: PS5 vs PS4 Performance Review - IGN

Gran Turismo Sport Will Have Damage and Weather; Polyphony Optimizing for 60 FPS

F1 22: How to Fix Low FPS and Lag

Project CARS Studio Boss Admits to Problems With Wii U Version, Hoping For Nintendo Hardware Announcement at E3

Why am I seeing low GPU usage and lower FPS than my friend in Warzone?

Forza Horizon 5 graphics optimization guide - most important graphics settings benchmarked

PDash - Gran Turismo 4 Prologue UI

GT4, PCSX2. this specific bloom effect makes the fps drop way low. runs flawlessly otherwise. any workarounds? : r/SteamDeck