Asus brightness numbers must be a scam because this thing doesnt hit anywhere near 500 nits in SDR. ULMB2 at pulse 100 is outputting 120 nits. Who quality checks these things before I buy them?
According to the specifications of the ROG Swift 360Hz PG27AQN, the brightness is 400 cd/m2 under normal settings.
Could you please clarify whether your current settings are DP/HDMI SDR YCbCr sRGB Gamma or Auto SDR Brightness?
Also, could you provide information about the current way the display is connected, the input signal sources, the OSD related settings, and the basis for your assessment of the display's brightness?