Let us cut through the marketing and look at what actually matters for your setup in SA. We answer "How to Fix Color Banding on Windows 11 240Hz Monitors" directly, with numbers that matter in SA.

Quick Answer

On a build with a 240Hz monitor, banding most often comes from a limited colour range or 6-bit output, not damaged hardware. Switch to full RGB, enable 10-bit colour, and reseat the cable. These steps fix banding for the large majority of Windows 11 users at no cost.

Set Colour Depth and Range Correctly

Open the GPU control panel and set output to 8-bit, or 8-bit with dithering if 8-bit is unavailable. Switch dynamic range to Full RGB so dark gradients render smoothly at 1080p. On Windows 11 with a 240Hz monitor, this single change removes most banding immediately.

Check the Cable and Bandwidth

A cheap or damaged cable can starve 240Hz output at 1080p and force colour compression. Use a certified DisplayPort or HDMI cable rated for your resolution and refresh rate, often around R4,200. With a 240Hz monitor, plug directly into the graphics card output for full bandwidth.

Update Drivers and Firmware

Install the latest GPU driver and check the monitor for a firmware update. Outdated drivers often default to limited colour, which causes banding. After updating, restart and recheck a 1080p gradient test image on your 240Hz panel.

FAQ

Why does my screen show colour banding with a 240Hz monitor?

Usually because output is set to limited range or 6-bit colour at 1080p. Switch to Full RGB and 8-bit in the GPU panel, and banding clears on most Windows 11 setups.

Is colour banding a sign of a faulty monitor?

Rarely. It is almost always a software or cable issue at 1080p, fixable for the cost of a R18,000 cable at most. Only if it persists after correct 8-bit colour settings and a good cable should you consider a panel fault.

Does HDR cause banding?

Poorly calibrated HDR can. Calibrate HDR in Windows 11 and lower extreme contrast at 240Hz and 1080p; if banding shows only in HDR, the fix is in the HDR settings, not the hardware.

Shop smart Set 10-bit Full RGB and a certified cable first; if banding survives a good driver and cable, check the panel warranty.