A 240Hz monitor usually is not the only cause of throttling. Treat it as a PC, driver, cable, power, or Windows stability issue and test the display path carefully.
A 240Hz monitor that keeps throttling is most often caused by an aggressive built-in overdrive or eco power mode lowering the effective refresh. The safe first move is to disable eco or power-saving modes, set the panel to its full 240Hz profile, and update firmware, which resolves it for most SA gamers without a return.
Running at 240Hz stresses the cable, GPU and panel far more than 60Hz, so marginal faults surface. In this case the usual cause is an aggressive built-in overdrive or eco power mode lowering the effective refresh, and confirming it before a return saves both time and a wasted courier trip.
Start safe: disable eco or power-saving modes, set the panel to its full 240Hz profile, and update firmware. If the symptom persists at a lower 144Hz or 120Hz refresh with a known-good DisplayPort 1.4 cable, the panel or cable is the likely culprit and warranty becomes the next step.
A throttled refresh usually traces to an eco mode or a profile that quietly caps the panel below its rated 240Hz.
Yes. Power-saving and eco modes can reduce the effective refresh, so turning them off restores the full 240Hz capability.
Use the on-screen display's refresh indicator or a frame-rate test tool to verify the panel is genuinely running at 240Hz. If the fault survives a clean driver, a known-good cable and a lower 120Hz refresh, treat the panel as defective and lodge the warranty claim. Plan one clean upgrade at a time and size each part to your monitor and budget, and your setup stays balanced and cost-efficient for years of gaming in South Africa. If the fault survives a clean driver, a known-good cable and a lower 120Hz refresh, treat the panel as defective and lodge the warranty claim.
Reproduce the fault at 120Hz first; if it disappears, the cause is signal, refresh or settings related rather than a dead panel.
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