This setting can be found in many of DScaler’s filters. It enables a fast way to access memory known as prefetching.

You’ll probably want to keep this setting turned on. With it enabled, the filters can run up to twice as fast.

However, there are a few motherboards — mostly made by VIA — for which fast memory access will cause problems. If you see fleeting horizontal lines in your picture, try turning this off in any filters which offer it. If that fixes the lines, you’ll know to keep this setting disabled.