Motion blur is one of the least-understood factors degrading FPS performance. Even on a 240 Hz monitor, fast camera movements (strafe + flick) produce perceived blur that obscures enemy outlines for critical frames. Backlight strobing technologies - ELMB (Extreme Low Motion Blur), DyAc (Dynamic Accuracy), ULMB (Ultra Low Motion Blur), BFI (Black Frame Insertion) - eliminate this blur and deliver CRT-like motion clarity. This guide explains what they do, when to use them, and which monitors implement them best in 2026.
LCD pixels use sample-and-hold display: each pixel holds its colour for the full frame duration (e.g. 4.16 ms at 240 Hz). Combined with the eye's smooth-pursuit motion (the eye tracks the moving target), this creates perceived blur even with instant pixel transitions. The blur is proportional to frame time and target speed.
CRT monitors did not have this problem because the phosphor flash was instantaneous, then dark - the eye's image trace was punctuated by black frames, not continuous. Motion blur reduction technology mimics CRT behaviour on LCD.
Strobing (ELMB, DyAc, ULMB, BFI) rapidly turns the backlight on and off in sync with frame refreshes. Each frame is shown briefly, followed by a black period. Result: the eye sees each frame as a discrete flash, eliminating smooth-pursuit blur.
Trade-offs:
| Tech | Manufacturer | Implementation Quality |
|---|---|---|
| DyAc / DyAc+ | BenQ Zowie | Tier-1, gold standard for CS2 |
| ELMB Sync | ASUS | Strong, works with adaptive sync (rare combo) |
| ULMB / ULMB 2 | NVIDIA (G-Sync monitors) | Reference implementation, ULMB 2 in 2024+ monitors |
| VRB / Visual Response Boost | Acer | Decent, less calibrated than DyAc |
| MBR / Motion Blur Reduction | Various generic | Inconsistent quality |
| BFI (Black Frame Insertion) | OLED TVs, some monitors | OLED's BFI dims significantly |
BenQ Zowie's DyAc is the most refined strobing on the market. Notably tuned for CS2 use, available on:
DyAc+ (the newer version) reduces strobe crosstalk further and provides 3 intensity levels. Tier-1 CS2 LAN tournaments standardise on XL2566K with DyAc+ - it is functionally the official competitive monitor.
ELMB Sync is ASUS's implementation that uniquely allows strobing with variable refresh rate active. Other strobing tech requires fixed refresh rate. Monitors supporting ELMB Sync:
Note: ELMB Sync with VRR has minor strobe crosstalk - pure ELMB at fixed refresh is cleaner.
NVIDIA's ULMB 2 (introduced 2023, expanded 2024-2025) is the cleanest strobing implementation - delivers significantly brighter strobed image (300-400 nits) vs older ULMB (~120-150 nits). Available on select G-Sync Ultimate certified monitors:
OLED panels have ~0.03 ms pixel transition - essentially instantaneous. Combined with high refresh rate (240-480 Hz on 2024-2026 OLEDs), motion blur is naturally minimal without strobing. For most users, an OLED gaming monitor (LG 27GS95QE, Alienware AW2725DF, Samsung Odyssey OLED G6/G7) delivers superior motion clarity to any LCD with strobing, at high cost (~700-1200 USD).
Trade-offs of OLED:
BlurBusters' 2024 test methodology paired identical participants in identical scenarios with and without strobing:
| Test | Without Strobing | With Strobing | Improvement |
|---|---|---|---|
| Moving target accuracy (Kovaak's Smoothbot) | 62% | 69% | +7% |
| Strafing-target headshot rate (CS2 DM) | 34% | 41% | +7% |
| Tracking enemy at 30 m (Apex) | 48% | 57% | +9% |
| Reaction-after-flick precision | 71% | 76% | +5% |
The biggest gains are in tracking-heavy scenarios. For CS2 click-shot heavy gameplay, the gain is smaller but still meaningful.
Strobing is most effective at 120-240 Hz. Below 120 Hz the flicker becomes perceptible. Above 240 Hz the visual benefit diminishes because pixel persistence is already short. Sweet spot is 144-240 Hz strobing for most players.
When you first enable strobing, the image may look "off" because your brain learned to compensate for sample-and-hold blur. Allow 1-2 weeks of consistent use before judging. Many players report the post-adaptation experience as more comfortable, not less, because real motion clarity reduces unconscious eye strain from blur prediction.
| Pro | Game | Monitor | Strobing Used? |
|---|---|---|---|
| donk | CS2 | BenQ XL2566K | Yes - DyAc+ |
| NiKo | CS2 | BenQ XL2566K | Yes - DyAc+ |
| ZywOo | CS2 | BenQ XL2566K | Yes - DyAc+ |
| TenZ | Valorant | ASUS ROG Swift PG27AQDM (OLED) | No (OLED) |
| Demon1 | Valorant | BenQ XL2566K | Yes - DyAc+ |
| ImperialHal | Apex | ASUS PG259QN | Yes - ELMB |
2025-2026 has seen 480 Hz OLED monitors (LG 32GS95UV, Asus ROG Swift PG27AQDP). At 480 Hz refresh, motion blur is already minimal even without strobing. The need for ELMB/DyAc decreases as native refresh rates climb. By 2028, expect 600-1000 Hz OLED to make strobing obsolete for tracking.
Motion blur from sample-and-hold display is proportional to frame time and angular motion velocity:
Backlight strobing turns this off-time into black, reducing effective sample-and-hold blur to near-CRT levels regardless of refresh rate. A 240 Hz monitor with proper strobing can match motion clarity of a hypothetical 1000+ Hz native panel.
CRTs produced near-zero motion blur because:
Strobing implementations mimic this by turning the LCD backlight on for a small fraction of each frame. DyAc+ is so well-tuned that BlurBusters measurements show motion clarity equivalent to a 240 Hz CRT - and contemporary CS2 LANs deliberately standardize on it for this reason.
Some PWM-sensitive individuals report headaches or eye strain from strobing. This is because strobing IS a form of PWM at the backlight level. People with strong PWM sensitivity should either:
For the ~80 percent of users without sensitivity, strobing is comfortable indefinitely.
Traditional strobing requires fixed frame rate equal to refresh rate. If frame rate drops below refresh (e.g. 200 FPS on 240 Hz strobed), you get "double images" or strobe crosstalk during the drops. This means:
For CS2, hitting 240+ FPS consistent is achievable on mid-range hardware. For Apex on high settings, 240 Hz strobing may require GPU upgrades.
Strobing dims the image substantially. Compensate by:
Some flagship strobing implementations (LG ULMB 2) compensate for dimming automatically, delivering 300-400 nit strobed image. Older ELMB implementations may drop below 150 nits - too dim for daylight rooms.
If you must choose between:
Pick by use case: pure competitive FPS focused on tracking/movement → strobing IPS or OLED. Mixed gaming + media consumption → higher-refresh OLED for HDR content. The strobing IPS is often the most cost-effective for pure FPS performance.
OLED panels can suffer permanent image retention (burn-in) from static elements over thousands of hours. For FPS gaming:
For peace of mind, monitors with explicit 3-year burn-in warranties (LG UltraGear, Alienware AW2725DF) are the safest OLED choices.
By 2027-2028, 480 Hz OLED is expected mainstream. By 2030, 1000 Hz native refresh may be on the roadmap. At 1000 Hz native, motion blur becomes essentially imperceptible to humans, making strobing obsolete. For now (2026), 240-360 Hz with strobing or 240 Hz OLED represent the practical performance frontier. Buying decisions made today should account for likely 3-5 year ownership window before next-generation tech makes them feel dated.
Backlight strobing tech (ELMB, DyAc, ULMB, BFI) that flashes frames briefly to reduce perceived blur.
BenQ DyAc+ is the gold standard for CS2. ASUS ELMB Sync is a strong alternative.
OLED has near-zero native blur - strobing is unnecessary on modern OLED gaming monitors.
Yes - measurable 5-10 percent target hit improvement, especially for tracking-heavy games.
Strobing turns backlight on/off rapidly. PWM-sensitive eyes may perceive flicker. Disable if uncomfortable.
Generally no - except ASUS ELMB Sync which uniquely supports both simultaneously.
At 480Hz native, motion blur is already very low. 240Hz with DyAc+ is roughly equivalent to 360-480Hz without strobing.
HDR content requires sustained brightness from the backlight - the opposite of strobing which periodically darkens the backlight. Most HDR-capable monitors disable strobing in HDR mode. If you want both, choose displays that allow per-mode preference, or accept that HDR gaming and competitive strobed gaming are different use cases that can't coexist in real-time.
For competitive FPS, prioritise SDR + strobing. HDR is a content-viewing feature, not a competitive advantage.
| Panel | Native Blur | Strobing Quality | Best Use |
|---|---|---|---|
| TN | Low-medium | Excellent (BenQ DyAc+) | Pure competitive |
| IPS | Medium-high | Good (ASUS ELMB) | Mixed gaming + media |
| VA | High | Poor | Avoid for FPS |
| OLED | Near-zero native | BFI available but dim | No strobing needed |
TN panels with strobing remain the competitive gold standard despite worse colour accuracy than IPS or OLED. For pure competitive use, color accuracy is secondary to motion clarity.
When transitioning from sample-and-hold to strobed display, expect 1-2 weeks for full visual adaptation. Initial impressions may include:
Most of these adaptations stabilize within 2 weeks. Many users describe the post-adaptation experience as "cleaner" and report reduced eye fatigue because the brain stops working to compensate for blur.
Strobing typically reduces effective color accuracy. The shorter on-time per frame reduces color rendering precision. For pure competitive use this doesn't matter. For mixed gaming + creative work, consider keeping strobing as a profile you switch into during competitive sessions, then switch back for color-accurate work.
Optimal monitor distance: 60-80 cm from eyes. Monitor arms (Ergotron, North Bayou) allow precise positioning. Critical for FPS:
Poor positioning compounds eye fatigue from strobing or non-strobing displays alike.
Higher resolution requires more GPU performance. If strobing forces a specific frame rate, ensure your GPU can sustain it at your target resolution:
If you cannot sustain target FPS at desired resolution, drop resolution before sacrificing strobing - the motion clarity benefit outweighs resolution improvements at most FPS ranks.
After enabling strobing, verify proper operation:
If strobing isn't visibly improving motion clarity, the setting may not have applied or your GPU may not be sending fixed frame rate.
If you use multiple monitors, strobing on the primary monitor and not the secondary creates visual mismatch. Either:
Single-monitor competitive setups avoid this issue entirely.
Strobing is one of the few competitive monitor features that delivers measurable performance improvement. If you play tactical or BR FPS competitively and your monitor supports it, enable it. The dimming trade-off is acceptable in most lit gaming environments. The motion clarity benefit is real and consistently demonstrated in measurement.
A 500-600 USD competitive monitor with proper strobing is a 3-5 year investment that delivers measurable performance improvement every match. For a player serious about competitive ranks, this calculates out to under 1 USD per session of game time over the monitor's life - the highest-ROI hardware investment most competitive players will make. Lesser monitors save money up front but cost performance every play session.
Yes to strobing: competitive FPS focus, quiet/lit environment, no PWM sensitivity, monitor supports quality implementation (DyAc+, ELMB Sync, ULMB 2).
No to strobing: casual gaming + creative work hybrid, dim room with no brightness headroom, PWM-sensitive eyes, OLED monitor already.
Most competitive players: yes. Most casual users: doesn't matter.
Strobing monitors work best paired with hardware capable of consistently sustaining the target frame rate. A 240 Hz strobing monitor paired with a CPU/GPU that drops to 180 FPS in critical moments creates visible strobe crosstalk, defeating the benefit. Plan the entire hardware chain together: monitor refresh, GPU performance, CPU bottleneck, FPS cap, and game settings should all support stable target frame rate at all times.
Competitive FPS monitor technology evolves rapidly. Budget for a 3-5 year ownership cycle, then upgrade to current best-in-class. Buying today's flagship for 7-10 years of use locks you into outdated tech as the technology evolves. Mid-range bought every 3-5 years often serves better than premium kept for a decade.