Grand Theft Auto IV is a sprawling open-world action-adventure set in Liberty City where players spend most of their time driving, shooting, and completing story missions amid dense traffic, pedestrians, and destructible environments. On PC the Complete Edition is still played primarily as a single-player experience, often enhanced by community mods that fix crashes, improve frame pacing, and add visual upgrades. Because the original DirectX 9 engine is poorly threaded, modern systems frequently encounter micro-stutters during fast motion or when entering high-density districts. At 1440p the increased pixel count raises GPU demand modestly while the core CPU workload—managing draw calls, physics calculations, and streaming—remains the dominant factor. Players notice this most when accelerating through crowded streets or during explosive set-pieces; without sufficient CPU threads and cache, frame delivery becomes inconsistent even if average rates look acceptable. DXVK translates the API to Vulkan, which dramatically reduces CPU overhead on contemporary hardware, but the fix still performs best when paired with a processor that offers strong single- and multi-threaded efficiency. Common pain points include assuming a powerful GPU alone will solve everything, or neglecting an SSD for fast asset loading. Many builders also overlook that native settings offer limited control; community tools like FusionFix add options for shadow quality and traffic density that directly influence CPU load. Before choosing parts, understand that a 1440p GTA IV PC should deliver consistent pacing and quick loading first, then visual clarity, rather than chasing maximum settings that yield little perceptible gain on this aging title.