AOC AGON AG275QXL Review – The League of Legends Monitor

System latency is another area of our testing, where we use Nvidia’s Latency and Display Analyzer Tool (LDAT) to measure end-to-end system latency. LDAT itself is a photosensor which is placed on the monitor. It has an integrated mouse button, allowing it to measure the total time taken from mouse click, to an action happening on screen, which is done by measuring a change in luminance. This data is logged to a CSV file over USB, allowing for close analysis of the data.

As this is end-to-end system latency, we are not measuring only the processing/input latency of each monitor we test. However, we can standardise the test process so the monitor is the only variable. It also gives an insight into how different refresh rates and resolutions can affect end-to-end latency, which is of course highly relevant to your purchasing decision.

We use Rainbow Six Siege for this testing.

Input latency is no problem for the AG275QXL, as we saw end-to-end system latency hit 9.5ms, which is basically as expected for a 1440p panel at this refresh rate. Other screens around this refresh rate have come in marginally faster, including the iiyama GB2770QSU, but we’re talking differences of 0.6ms or less, so I really don’t think you’d notice.

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