REVIEW: Dell E228WFP Part 10

Responsiveness

The manufacturer advertises the Dell as having a black/white response time of 5 ms, with its quick Twisted Nematic panel. We tested the responsiveness of the E228WFP using numerous games. The monitor demonstrates practically no visible streaking even in fast shooting games.

Image from the game "Far Cry" (Resolution 1.680 x 1.050)

Since the E228WFP does not feature overdrive technology, undesirable side-effects of this technology such as corona effects (Ghosting) and display latency (aka input lag) are not an issue. Our tests for measuring latency also arrived at this conclusion.

Parallel use with a CRT monitor to compare with zero latency.

We ran the E228WFP in clone mode with a tube monitor and allowed a virtual stopwatch to run on both. We then did photo shoots of several hundred pictures. In most of the pictures, the clocks are synchronised exactly, with very slight deviations appearing on a small number of pictures.

In order to measure the exact deviation in these view exceptions, we repeated the latency test with the more precise Pixel-Persistence-Analyzer (PixPerAn V2), which was developed further especially for Prad. In the aforementioned exceptions, we measured small deviations of up to 7 ms, which is equivalent to less than half a frame at a refresh rate of 60 Hz. Since such small latencies cannot be perceived by the naked eye, the deviations from zero latency in the Dell E228WFP do not need to be examined further.

The precise PixPerAn latency test shows even the smallest lags clearly.

Overall, the responsiveness of the des E228WFP can be rated as very good. Even so-called hardcore gamers will find no reason to complain here. However, a slight motion blur, caused by the technology, emerges in the Dell as in all LCD monitors; this cannot be avoided.

The interpolation behaviour cannot be modified on the hardware of the Dell E228WFP. Resolutions smaller than the native resolution of 1.680 x 1.050 are interpolated as full-screen by the monitor. Resolutions with different page formats are distorted.

The pictures above show the E228WFP at different resolutions. Left: Resolution 1,440 x 900 and right: Native resolution 1.680 x 1.050. Since both resolutions have the same aspect ratio, when the image is interpolated as full-screen, the picture content is not distorted and the circle remains round.

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