The monitor’s color gamut is larger than sRGB and AdobeRGB except that the very edge of the latter goes beyond the monitor’s gamut. Like with the XL24, the difference in the reproduction of red strikes the eye. Red is far purer and saturated on the XL30 than on ordinary monitors with fluorescent backlight.
The XL30 has no problems emulating the standard color gamuts. The diagram above shows that its sRGB mode coincides with the sRGB precisely. The two triangles merge into one. Take note that the XL30’s sRGB mode will differ somewhat from real monitors just because real monitors do not exactly match the sRGB space. But you can calibrate your XL30 with Natural Color Expert for any color gamut, including the gamut of a specific monitor with fluorescent backlight.
The brightness uniformity is similar to that of the XL24. These monitors seem to be set up individually at the factory for uniform white brightness but this process is technically unfeasible for black. As a result, the average nonuniformity of white brightness is 3.4% with a maximum of 10.7%. On black, the average and maximum are 6.2% and 23.8%, respectively.
The gamma curves are not exactly neat in the Custom and Calibrated modes. They coincide with the theoretical curve at the beginning of the diagram but then go lower than necessary, making the appropriate halftones darker than they should be.
It is much better in the AdobeRGB mode: the monitor’s gamma curves almost coincide with the theoretical one. Interestingly, AdobeRGB was the neatest mode on the SyncMaster XL24, too.
The monitor doesn’t provide a color temperature setting in the menu, so I just measured color temperature in the Custom, sRGB and AdobeRGB modes at the default settings (although you can use Natural Color Expert to calibrate the monitor for any temperature you want). The temperature dispersion between the levels of gray is quite acceptable, except that the darkest tone is suddenly warmer in the sRGB mode.
The color temperature setup is not perfect in terms of absolute numbers, either. It must be 6500K in sRGB and AdobeRGB modes, but proves to be 500K and 1000K higher, respectively. This drawback can be corrected with calibration in Natural Color Expert, though.
Alas, the positive impressions from the neater color temperature setup in comparison with the SyncMaster XL24 are spoiled by the results of the uniformity test: different pixels may vary by almost 900K in color temperature. There is a reddish warm smudge in the bottom right of the screen.
The level of brightness is normal in the custom mode (notwithstanding the lack of a contrast setting, you can reduce the monitor’s brightness to a comfortable level for standard ambient lighting) as well as in the sRGB and AdobeRGB modes. To remind you, these standards describe not only color gamut but also brightness of the monitor: 80 nits for sRGB and 160 nits for AdobeRGB.
Notwithstanding the same specified response time, the XL30 proves to be almost twice as slow as the XL24. Its response time average is 12.4 milliseconds (GtG) with a maximum of 26.8 milliseconds. The monitor is going to satisfy gamers, at least not very demanding gamers, yet it is not very fast. Popular inexpensive 5ms monitors based on TN matrixes have about the same real speed.
The average level of RTC errors is 8.8%, similar to the XL24, but the distribution of errors is different. A large part of halftone transitions are performed without any errors at all. RTC-provoked artifacts are negligible on light halftones, but a dark-gray object moving on a black background may acquire a visible light trail. This effect is only noticeable in games, though.