Why does STARFIELD stutter during aerial combat with Crucial DDR5 RAM?

Aerial combat in STARFIELD was unplayable due to frame time fluctuating wildly between 12-28ms. I tried disabling the memory controller in Device Manager, which crashed the system immediately, leaving me stuck. I used GamePP Peripheral Driver Conflict Detector to set the RGB sync service to Manual and enabled Hardware Encoding Priority in OBS. RivaTuner showed frame times stabilizing at 8-11ms, and HWiNFO reported temps at 50-56℃. This allowed me to export clean recordings without the stutter ruining the visual flow.