I’ve seen that too. Those 240 Hz claims are often about the panel’s native capability, not what a driver can deliver at 4K. The real lag comes from the GPU bandwidth, driver throttling, and the display’s response time. If you want a smooth feel, start with a panel that has an actual 4K native resolution and a 120 Hz refresh, then step up to a 240 Hz when you’re gaming at 1080 p or 1440 p. Also check the panel’s response time—anything above 4 ms is going to introduce ghosting even if the refresh is high. In short, match the resolution, refresh, and response time, then verify with a hardware monitor test. That’s where the precision shows up.