To begin with, it's crucial to recognize that overclocking a camera is not a recommended practice due to the potential risk of overheating, damage to the device, and safety concerns. Additionally, the camera's hardware and software are optimized to function at specific specs, and deviating from those might cause unpredictable or unwanted outcomes.
Regarding the Sony FDR-AX700 camera, it's unlikely that it can be overclocked enough to record at 2000 FPS. Although the camera can capture high-speed footage, its frame rate capacity is often restricted by its software and hardware capabilities. Trying to push the camera beyond its explicit boundaries can result in low image quality or even camera breakdown.