Author Topic: ViewSonic VX2458-mhd Review: Matte 144hz 1080p TN with AMD Free-Sync  (Read 16118 times)

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 761
    • View Profile

The VX2458-mhd's overdrive setting named Response Time is located in the Manual Image Adjust menu, and offers three settings: Standard, Advanced and Ultra Fast.  The Response Time setting is preset to Advanced which is the best setting for 60hz (console gaming) while the Ultra Fast setting is the best for 120 (Xbox One X) and 144hz.  The Ultra Fast setting causes obvious dark overshoot ghosting at 60hz, and some of Viewing Modes such as the Text Mode lock the Response Time settings and set it to the Standard mode resulting in slower pixel response times and more obvious streaking.  Overshoot ghosting appears in the form of bright, colored or dark transparent halos or glow on colors and shades in motion.

Dell U2713H Obvious Overshoot Ghosting Example
Spoiler (hover to show)

At 144hz the default Advanced Response Time overdrive setting provides very fast and overshoot free pixel responses times when the default Standard Viewing Mode is selected.  The Standard Viewing modes provides the best image quality and gaming performance out of all the Viewing Modes since the others are either significantly less accurate and/or lock the the Response Time setting to the Standard mode which while still fast, obviously provides slower pixel response times than the higher Response Time settings.  The overdrive performance offered by both the Advanced and Ultra Fast response time settings is excellent, but typical for modern 144hz TN panels, and thus not an area of performance to rave about.  For example, the VX2458-mhd offers nearly identical performance to the Acer XF240H and ViewSonic XG2402 I tested, and PRAD's oscilloscope measurements of the pixel response times prove that it offers similar performance to many other monitors.  PRAD's oscilloscope measurements prove the VX2458-mhd's Ultra Fast Response Time setting also provides slightly better performance than the XG240R's best setting which is the Faster setting.



Such minute pixel response time differences are irrelevant to 99.99% of users, but the VX2458-mhd is significantly cheaper and more accurate and consistent preset color accuracy wise. 


VX2458-mhd Response Time Flaws

I observed a bit of obvious dark transparent black overshoot ghosting on the white clouds in the blue sky of the Overwatch map Illios when using the Ultra Fast overdrive setting at 144hz and quickly panning the camera and dragging this screen shot around:


It's quite common for monitors to suffer from a bit of obvious (to an experienced LCD user) dark overshoot or white streaking on the clouds when they move quickly across the screen as the result of a camera pan (via controller or mouse) in game.  When the Advanced Response time setting is used a tiny bit of white streaking occurs on the clouds while the Ultra Fast setting causes a bit of dark transparent overshoot, and is inferior when dealing with high contrast light blue colors and white, but superior for everthing else.

Tiny grey streaks are visible at the top of the Eiffel tower when the ghosting test speed is increased from 960 to 1440 pixels per second, and when both the Advanced and Ultra Fast settings are used, but the Ultra Fast setting suffers from slightly less since it speeds of the pixel response times slightly.

VX2458-mhd 144hz Advanced vs Ultra Fast Close Up
Spoiler (hover to show)

In the Response Time Test UFO Ghosting photo comparison above the photos also show that the light trailing after or ghost images (color streaking) in the Advanced Response Time photos are reduced, but replaced by a darker transparent trail (overshoot) in the Ultra Fast photo.

60hz Response Time Advanced versus Ultra Fast
Spoiler (hover to show)

The default Advanced Response Time setting provides the best 60hz performance comparable to the best 60hz TN panels such as the BenQ Zowie RL2460HT which along with the VX2458-mhd offer marginally better performance than the Acer XF240H and ViewSonic XG2402 I tested, both of which have worse image quality than the VX2458-mhd.  As expected, the VX2458-mhd is slightly faster than the fastest 60hz AHVA/IPS/PLS panels like the Acer XB321HK. 

At all refresh rates the VX2458-mhd offers outstanding performance since it is free from what my highly experienced and trained eyes would deem obvious color streaking or very overshoot ghosting.   At 144hz he Ultra Fast is marginally faster than the Advanced setting, but suffers from a bit of overshoot with fast light blue and white transitions (mentioned above), so very experienced display users with an eye for overshoot may want to stick with the Advanced setting.
« Last Edit: May 19, 2019, 01:10:39 am by NCX »