Backlight Strobing Technologies: BenQ DyAc+ vs ASUS ELMB-SYNC vs ULMB 2: Advanced Implementation and Real-World Architecture

[Hunter Reed]

I’ve been running controlled A/B tests across my Zowie XL2546K (DyAc+) and my RTX 4090 pushing ULMB 2 on a 360Hz panel, and the phosphor persistence behavior is where I’m seeing the real divergence. DyAc+ locks a tighter pulse width around 190µs, but I keep catching faint double-edge ghosting on fast sweeping crosshairs that smells like residual afterglow rather than panel holdover. For anyone who’s measured this with a photodiode: what residual persistence window are you actually seeing from DyAc+ versus ULMB 2’s dual-backlight strobe, and is that second-frame ghosting I’m chasing a known artifact of the dual strobe architecture or something in my signal chain?

The ULMB 2 dual-backlight engine is clearly designed to push brightness past the single-strobe limit, but the flicker-efficiency tradeoff is eating my usable nits. On the ELMB-SYNC side,

"Display: ASUS ROG PG27AQDM 240Hz OLED"

"Mouse: Wooting 60HE + Lamzu Maya 4K"

"Pad: Artisan Zero Soft XL"

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