TN / Esports#4 in our TN / Esports rankingsULMB 2 at up to 540Hz
ASUS ROG Swift Pro PG248QP review
ASUS's 24.1-inch 1080p E-TN that overclocks to 540Hz, with a G-SYNC module, ULMB 2, and the Reflex Analyzer.
As an Amazon Associate I earn from qualifying purchases. How affiliate links work here.
Quick verdict
The PG248QP was the fastest monitor TFTCentral had tested at launch, with a 1.5 ms average response and no overshoot at 540Hz, 0.83 ms lag, and a best-in-class ULMB 2 implementation with minimal crosstalk. It includes NVIDIA's Reflex Analyzer for measuring system latency.
Its G-SYNC module limits connectivity to DisplayPort 1.4 and HDMI 2.0, ULMB 2 does not work with VRR, and TN viewing angles are restrictive. Newer 600Hz models and Pulsar monitors have narrowed its advantage, so it is best bought at a discount.
24.1″ · 1080p · 500Hz (540Hz overclock) · TN (E-TN (AU Optronics Esports-TN)) · ULMB 2
Buy it if
- You play esports at a fixed high frame rate.
- You want ULMB 2 and the Reflex Analyzer.
Skip it if
- You want strobing with VRR; see the ASUS XG248QSG.
- You connect consoles.
Key specifications
| Exact model | PG248QP |
|---|---|
| Size / aspect | 24.1″ / 16:9 |
| Resolution | 1920×1080 |
| Refresh rate | 500Hz (540Hz overclock) |
| Dual mode | No |
| Panel family | TN |
| Panel subtype | E-TN (AU Optronics Esports-TN) |
| Subpixel layout | RGB stripe (LCD) |
| Coating | Matte anti-glare |
| Curvature | Flat |
| Backlight | Edge-lit LED with ULMB 2 strobing |
| Motion technology | ULMB 2 at fixed 360, 480, 500, and 540Hz (not with VRR), adjustable pulse width |
| Adaptive sync / VRR | NVIDIA G-SYNC module |
| HDR | VESA DisplayHDR 400 (per listing) |
| DisplayPort | 1x DisplayPort 1.4 with DSC (540Hz) |
| HDMI | 2x HDMI 2.0 (240Hz) |
| USB-C | None |
| USB ports | 2 USB data ports |
| KVM switch | No |
| Audio | Headphone jack |
| Stand | Retractable claw-foot base with tilt, height, swivel, and rotation |
| VESA mount | Unknown |
| Warranty | 3 years (per listing title; terms not verified) |
Specifications are manufacturer-stated unless marked as measured. “Unknown” means we could not verify the value, not that it is zero or absent.
Advantages and drawbacks
Advantages
- 1.5 ms response with no overshoot at 540Hz (TFTCentral).
- 0.83 ms display lag.
- ULMB 2 with minimal crosstalk and adjustable pulse width.
- NVIDIA Reflex Analyzer.
Drawbacks
- HDMI 2.0 limited to 240Hz; no USB-C.
- ULMB 2 does not work with VRR.
- Restrictive TN viewing angles.
- Gamma measured at 1.98 versus 2.2 target out of the box.
What independent testing reports
| Metric | Reported result | Conditions | Source |
|---|---|---|---|
| Grey-to-grey response | 1.5 ms average, no overshoot | Normal overdrive at 540Hz | TFTCentral, November 13, 2023 |
| Total display lag | 0.83 ms | 540Hz | TFTCentral, November 13, 2023 |
| ULMB 2 brightness range | 318 to 31 nits | Pulse width from maximum to minimum | TFTCentral, November 13, 2023 |
| Contrast | 1,267:1 | Static contrast | TFTCentral, November 13, 2023 |
These are third-party results, not our tests. Different outlets use different methods, so compare numbers only within the same source.
Motion, response, and latency
TFTCentral measured a 1.5 ms average response with no overshoot at 540Hz and 0.83 ms lag. ULMB 2 runs at fixed 360, 480, 500, or 540Hz, with brightness ranging from 318 to 31 nits depending on pulse width. TFTCentral described its clarity as roughly equivalent to a 2,000Hz sample-and-hold display, which is a perceived-blur comparison.
Image quality and HDR
TFTCentral measured 1,267:1 contrast, impressive for TN, but gamma out of the box was 1.98 instead of 2.2 and viewing angles are restrictive.
Connectivity, PC, and console notes
DisplayPort 1.4 with DSC for 540Hz, two HDMI 2.0 ports at up to 240Hz, and two USB ports.
Warranty and ownership
As an LCD, no burn-in concern. The listing title mentions a 3-year warranty; confirm terms.
Warranty: 3 years (per listing title; terms not verified)
Alternatives worth comparing
BenQ ZOWIE XL2586X+
24.1″ · 1080p · 600Hz · TN (Fast TN)
600Hz TN with DyAc 2 and HDMI 2.1.
ASUS ROG Strix Ace XG248QSG
24″ · 1080p · 600Hz (610Hz overclock) · TN (Super TN)
610Hz TN with ELMB Sync strobing that works with VRR.
Questions buyers ask
Does ULMB 2 work with G-SYNC?
No. ULMB 2 runs at fixed refresh rates without VRR.
Final recommendation
Still one of the best-measured TN esports monitors; buy it at a discount if ULMB 2 appeals to you.
Sources
- Asus ROG Swift Pro PG248QP Review — TFTCentral, November 13, 2023 (independent testing)
- Amazon listing for this exact model (ASIN B0CC7S6P3K), matched on September 30, 2026 by its listing title. We do not show Amazon prices or ratings.
First published . Last substantive update .