> on one, the outer part of the gray square looks like there are yellow dots, while on the other monitor, it flickers, but only while the image is over a partic

> on one, the outer part of the gray square looks like there are yellow dots, while on the other monitor, it flickers, but only while the image is over a particular place on the physical monitor (this happens with other images where adjacent pixels frequently have a large difference in color). Your monitor likely has a 6-bit panel and uses FRC to emulate an 8-bit display. This tends to cause content-dependent flickering and other temporal artifacts.