Why does Forza Horizon 5 stutter on the Jginyue X99M-PLUS?
Cruising at 300 km/h, I noticed that while CPU usage looked fine, the frame times were jumping erratically between 16-32ms. The memory controller on the Jginyue X99M-PLUS D4 was having a hard time with modern instruction sets, creating these tiny synchronization delays that felt like micro-stutters. I tried the in-game 'Low Latency' mode, but that just pushed input lag up to 25ms, which felt like driving on ice. I ended up updating the BIOS to the latest version, disabled C-States entirely, and locked the RAM at 2133MHz with auto-tuning off. The frame time analyzer finally showed a tight 16-20ms window, and the steering felt snappy again. Disabling C-States did bump my idle temps by 8℃, but a quick fan curve tweak fixed that. CPU is now 58-65℃ and RAM is 42-48℃. The internal benchmark confirms everything is validated, though RAM temps occasionally hit 58-63℃.
