Question 1

Does backlight strobing (BenQ DyAc 2 / NVIDIA ULMB 2) increase input lag?

Accepted Answer

A pervasive gaming myth claims that strobed backlights add input lag. In truth, modern implementations like BenQ DyAc 2 and NVIDIA ULMB 2 flash the backlight precisely during the optical dwell phase when liquid crystals have already completed their transition. Because the monitor does not delay or buffer incoming display frames, input latency is identical to non-strobed mode. The human benefit is dramatic: motion persistence (MPRT) drops from 4.16ms (at 240Hz sample-and-hold) down to sub-0.5ms CRT-like clarity, completely eliminating retinal tracking blur during rapid crosshair movement.

Question 2

Why does my 240Hz or 360Hz monitor feel choppy or run at 60Hz in games?

Accepted Answer

Windows frequently defaults new displays to 60.00Hz, even when connected to an esports-grade 240Hz, 360Hz, or 540Hz panel. Clean GPU driver installations also reset this value. To fix this, go to Windows Settings > System > Display > Advanced display, and verify "Choose a refresh rate". Additionally, in NVIDIA Control Panel, select the resolution under the "PC" header rather than the "Ultra HD" header. Ensure you are using a DisplayPort 1.4+ cable plugged directly into your dedicated GPU (not motherboard I/O ports), and verify frame pacing using the UFO Refresh Rate Verification Tool.

Question 3

Why do esports pros recommend capping FPS at -3 below monitor refresh rate when using G-Sync?

Accepted Answer

Variable Refresh Rate (G-Sync/FreeSync) only operates when the frame rate is strictly below the display maximum refresh ceiling (e.g. 237 FPS on a 240Hz monitor). If framerate hits or exceeds 240 FPS with V-Sync enabled, the GPU driver activates standard V-Sync back-buffer queuing, instantly adding 15ms to 35ms of input lag. By setting an in-game framerate cap or using NVIDIA Reflex at -3 FPS (or -4 FPS on 360Hz/540Hz), frametimes stay 100% within the G-Sync active window, giving zero tearing and near-zero input latency.

Question 4

Fast TN vs Fast IPS vs OLED: Which panel technology is superior for competitive esports?

Accepted Answer

Fast TN (such as the BenQ ZOWIE XL2586X 540Hz) features the fastest liquid crystal relaxation times, allowing intense backlight strobing (DyAc 2) with zero red phosphor decay or strobe crosstalk. OLED panels have virtually instantaneous pixel response (0.03ms GtG) and infinite contrast without liquid crystal overdrive overshoot, making them magnificent for mixed esports and AAA titles. Fast IPS strikes the best balance for general desktop use, viewing angles, and color accuracy, though backlight strobing on IPS exhibits mild strobe crosstalk.

Question 5

What is Overdrive Overshoot (Inverse Ghosting / Coronas) and how do I prevent it?

Accepted Answer

Monitor manufacturers apply voltage bursts to liquid crystals (called Overdrive or Trace Free) to speed up pixel color transitions. When set too aggressively (e.g. "Extreme" or "Fastest" in the monitor OSD), the voltage overshoots the target shade, causing bright white or inverted dark outlines ("coronas") behind moving objects. Use the Ghosting & Response Time Moving Grid Test on this guide to find the optimal overdrive level (typically "Normal", "Fast", or Level 2-3) where ghosting is minimized without creating coronas.

G-SYNC & FREESYNC FPS CAP CALCULATOR

G-SYNC / FREESYNC FRAME CAP PACER

THE 3 GOLDEN RULES OF ZERO-LATENCY G-SYNC / FREESYNC (NVIDIA & BLURBUSTERS)