No one tested PWM frequencies in 2011. Asus PA248Q=same grainy coating as the U2412. The PB248Q is good but the BL2411PT is cheaper.
Get a Asus VS24AH, BenQ BL2411PT (Europe Only) or spend more on the HP Z24i (PRAD's review confirms it's PWM Free). Most newer matte AH-IPS have less grainy matte coatings and higher PWM frequencies.
看上去可以啊