Author Topic: HP 25f Review: Almost-Glossy 75hz IPS with AMD Free-Sync  (Read 208 times)

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
HP 25f Review: Almost-Glossy 75hz IPS with AMD Free-Sync
« on: January 05, 2019, 04:02:17 am »


Please support my work via crypto currencies or Paypal (paypal email is thedeepinthesky@yahoo.com).  NCX's Amazon wish list

BTC address:
Spoiler (hover to show)

ETH address:
Spoiler (hover to show)

LTC address:
Spoiler (hover to show)

2018: HP 25f Review: Almost-Glossy 75hz IPS with AMD Free-Sync: 25er & 25es successor with AMD Free-Sync, native 75hz, the fastest pixel response times, but worse color accuracy than the 25er & 25es, and lower color space coverage than the older models.

2017: HP 24 Envy Review: Semi-Glossy 1080p IPS with 75hz & AMD Free-Sync: The 24 Envy natively supports 75hz (no overclock required), can cover more of the HDTV/REC 709 color space than the 25-27" HP monitors, but is less accurate than the HP 25er and 25es.

2016: HP 25er/es Review: Non-overclock-able 2016 Almost-Glossy/Low Haze Monitors with slightly more accurate color presets, 2x HDMI and 1x VGA.

2015: HP 27CW, 25XW and 27XW Review: Overclock-able 2015 monitors with worse preset color accuracy than the 25er and 25es.

The 25" and 27" HP CW/er/es/XW series monitors all use the same almost-glossy (Low Haze) coating which HP describes as:

"The reflective-ness typical with glossy screen surface is appreciably reduced with the Low Haze Screen enhancement, without losing clarity and contrast of screen imagery."

HP 25-27VX: These monitors use LED PWM Dimming or Flicker which ruins motion clarity and makes some people suffer from health issues like headaches and/or eyestrain. The VX monitors have less vibrant colors since they have a smaller and less accurate color gamut capable of covering up to 92% of the sRGB color space versus the 25-27CW & XW monitors 97%, and use a pure glossy coating while the 25-27 CW & XW monitors use a treated glossy or almost-glossy coating with some ant-reflective properties.


Review Information and Methodology:
Spoiler (hover to show)
« Last Edit: February 14, 2019, 06:48:05 pm by NCX »

Share on Facebook Share on Twitter Share on Google+



NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Features & Stand

HP 25f Front by Dr NCX, on Flickr

The HP 25f's casing and stand are an updated, but extremely similar variant of what its predecessors the HP 25CW, 25er, 25es and 25CW used , but the back of the er monitors casing is made of black plastic instead of white plastic like the 25er and 25es.  All of the HP 25-27" IPS monitors casings are made of sturdy plastic, while the easily detach-able "floating," stand is made of metal.  They 25f has the same fake bezel/frame-less design as the older 25-27 monitors which all have an inner black bezel which reduces the perceived black depth, and they have the same amount and type of inputs (2x HDMI & 1x VGA), and silver menu buttons located under the bottom right corner.


HP 25f Back by Dr NCX, on Flickr
« Last Edit: February 15, 2019, 08:37:25 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Part of the HP Family
« Reply #3 on: January 05, 2019, 04:29:08 am »
Menu & Set-Up

DSC_0639 by Dr NCX, on Flickr

Just like the older monitors, the HP 25f needs to have its overdrive setting (Response Time in the Image Control menu) which controls the pixel response times increased since it is preset to the lowest setting by default.  The Response Time setting needs to be set to Level 4 of 5 to provide the fastest overshoot ghosting free pixel response times, which are nearly on par with the fastest 60hz TN panels like the BenQ Zowie RL2460.

The AMD Free-Sync setting, Gaming - Free-Sync, in the Viewing Mode Menu must also be manually activated to enable Free-Sync with compatible AMD graphics cards and the Xbox One X.  The Gaming - Free-Sync setting locks the color (Red, Green and Blue) controls, but not the Brightness and Contrast settings, and it provides the same preset color accuracy as the default setting.
« Last Edit: February 15, 2019, 08:37:31 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Flicker/PWM Dimming

DSC_0655 by Dr NCX, on Flickr
« Last Edit: February 15, 2019, 08:37:41 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Brightness & Contrast

DSC_0668 by Dr NCX, on Flickr

HP 25f B & C by Dr NCX, on Flickr
« Last Edit: February 15, 2019, 08:37:48 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Almost-Glossy/Low Haze Coating
« Last Edit: February 15, 2019, 08:37:55 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Become A Great Fireteam Shooter
« Reply #7 on: February 13, 2019, 04:10:23 pm »
Ghosting/Overdrive Perfomrance

DSC_0693 by Dr NCX, on Flickr
« Last Edit: February 15, 2019, 08:38:09 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Speed: 75hz
« Reply #8 on: February 13, 2019, 04:10:53 pm »
Input Lag

DSC_0671 by Dr NCX, on Flickr

The HP 25f, 24 Envy and 25" & 27" CW/er/es/XW monitors can all be considered delay free (<3ms top screen Leo Bodnar measurement), but this is not surprising since most 1080p monitors are. Usually only multi-input 1440p-4k monitors have a around a frame (16.7ms) or two (33.33ms) of input lag. The Leo Bodnar device measures 9.8ms in the middle of the screen, but the Bodnar device has a built in delay and partially includes the monitors black-to-white pixel response times. Top screen Bodnar results are in the 3ms range, and both monitors tie with my CRT when using the SMT Tool. The actual signal delay (input lag without including the pixel response times) is likely less than a millisecond, but an oscilloscope is required to obtain the "true" value.
« Last Edit: February 15, 2019, 08:38:17 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
In Need Of A Mechanic
« Reply #9 on: February 13, 2019, 04:11:26 pm »
Preset Color Accuracy

DSC_0629 by Dr NCX, on Flickr

HP 25f Preset Chart by Dr NCX, on Flickr

Just like the HP 25er and 25es I tested in 2016 the 25f is Preset to the Neutral mode in the Color Control menu, which has locked color controls which prevent one from being able to edit the Red, Green and Blue color controls.  To activate Free-Sync with compatible devices (compatible graphics cards from AMD and Nvidia and the Xbox One X) the 24 Envy (tested in 2017) and 25f both need to be set to the Free-Sync mode to activate Free-Sync; the setting is located in the Viewing Modes Sub menu in the Color Control menu.  The HP 25f suffers from a light purple tint in the Neutral mode or out-of-the-box, and suffers from a light preset green tint when set to the Free-Sync mode, but the 25f does not need to have its contrast setting reduced from 80 to 75 like the HP 27CW, 25 & 27XW, and 25er and 25es I tested in 2015 and 2016.

The Free-Sync mode offers fairly accurate colors for a budget display, but editing the color controls makes the 24 envy and 25f switch to the Custom Color mode which de-activates Free-Sync.  The 25f is also significantly less accurate than its 2016 predecessors the 25er and 25es, but they don't support Free-Sync or 75hz natively like the 25f and 24 Envy do.  The 25er and 25es suffered from less of a preset green dominance, provided better gamma tracking (target=HDTV/REC 709 linear 2.2 standard) while the 24 Envy provided nearly complete HDTV/REC 709 and sRGB color space coverage, but slightly too gamma (2.42 average) which causes slight black crush or color and shade darkening.  Aside from the contrast issue mentioned the HP 25er and 25es provide significantly better preset color accuracy than the 25f, which like the er and es, can not fully cover the HDTV/REC 709 or sRGB color space since they can not display all blue and green shades properly, and over-saturate greens, reds and yellows.  The 24 Envy also can not fully cover the HDTV/REC 709 and sRGB color space, but barely falls short of doing so, and does not over-saturate colors. 

Overall the 25f can be considered to have good, but not great or excellent preset color accuracy, however this is to be expected for a budget 1080p IPS/PLS, and HP added AMD Free-Sync and 75hz support as well as fixed the preset contrast issue the previous two generations of panels suffered from.  The 25f is fairly accurate and vibrant, and does only looks slightly worse than a high end, professionally oriented and calibrated monitor like my Viewsonic VP2780-4K, which is a compliment when considered the price differences.

HCFR Grey Scale
Spoiler (hover to show)

HCFR Gamma
Spoiler (hover to show)

HCFR RGB Levels
Spoiler (hover to show)

HCFR RGB Color Temperature
Spoiler (hover to show)

HCFR CIE Diagram
Spoiler (hover to show)
« Last Edit: February 19, 2019, 11:55:00 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Un-Calibrated vs Calibrated

In this post the Free-Sync mode, which in my opinion is the mode important preset-mode, is compared to my calibration which does not apply to the Free-Sync mode which must be selected to activate Free-Sync with the Xbox One and Xbox One X.

HP 25f Free-Sync Preset vs Calibrated 1
Spoiler (hover to show)

The preset green dominance is quite apparent in this comparison which contains many grey shades.  The grey dominance may seem gross, but it is quite normal for affordable monitors up to 600$ US.
 
HP 25f Free-Sync Preset vs Calibrated 2
Spoiler (hover to show)


HP 25f Free-Sync Preset vs Calibrated 3
Spoiler (hover to show)


HP 25f Free-Sync Preset vs Calibrated 4
Spoiler (hover to show)

The preset green dominance is quite apparent in this comparison which contains many grey shades.  The grey dominance may seem gross, but it is quite normal for affordable monitors up to 600$ US.
« Last Edit: February 15, 2019, 08:38:29 pm by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Not Worthy Of A Spot On The Shelf
« Reply #11 on: February 13, 2019, 04:14:15 pm »
Calibrated Image Quality

DSC_0670 by Dr NCX, on Flickr

HP 25f Calibrated by Dr NCX, on Flickr

After calibration with dispcalgui and my Spectralcal C6 HDR 2000 colorimeter the HP 25f improves significantly, however it is again important to note that it is not possible to use both Free-Sync and custom color settings, that the 25f is significantly less accurate than its predecessors the 25er and 25es when calibrated, and that neither of these monitors support AMD free-Sync and 75hz like the 25f.  The 25f can only cover 91.7% of the sRGB color space when calibrated versus the 25er and 25es's 98.2%, and the 25f has nearly 300:1 less contrast when calibrated, and very obvious back-light bleed.  The calibrated image quality offered by the 25f is mediocre and on par with budget panels from half a decade ago while the 25er and 25es were very impressive for their price and year of release.  The 25f does not look bad, but it does not compete with significantly more expensive panels like its predecessors and the 24 Envy accuracy wise.  On a positive not, since the 25f uses the same almost-glossy or low haze coating it is still able to provide that nice glossy clarity, shiny sheen and enhanced vibrancy compared to a matte coating.
« Last Edit: Today at 12:04:23 am by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Viewing Angles & AH-IPS Glow

HP 25f VA 3 by Dr NCX, on Flickr

HP 25f VA 1 by Dr NCX, on Flickr

The 25f offers the same viewing angles as its predecessors, and most other budget 1080p IPS/PLS.  The viewing angles are only a problem if the monitor is set to low, or looked down at or viewed from above like so:

Spoiler (hover to show)

The top of AHVA/IPS/PLS panels need to line up or be higher than the viewers eyes to eliminate glow. The top left image shows the correct way to view an AHVA/IPS/PLS panel. and is also ideal for keeping proper posture and not hunching:

Spoiler (hover to show)

AH-IPS Glow

HP 25f VA 2 by Dr NCX, on Flickr

The top of AHVA/IPS/PLS panels need to line up or be higher than the viewers eyes to eliminate glow. The top left image shows the correct way to view an AHVA/IPS/PLS panel. and is also ideal for keeping proper posture and not hunching:

Spoiler (hover to show)

Glow is not a problem unless trying to look down at, or view the monitor from above, which is the incorrect way to view an AHVA/IPS/PLS panel.  The 25f suffers from the same amount of glow as its 2015 and 2016 predecessors from HP, and slightly more glow than the higher end HP 24 Envy from 2017.  If set at the correct height glow is not a problem when leaning back or off angle to the left or right.
« Last Edit: Today at 01:11:10 am by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Perceived Black Depth
« Last Edit: Today at 01:10:35 am by NCX »

NCX

  • Administrator
  • Hero Member
  • *****
  • Posts: 536
    • View Profile
Playstation 3 & 4

DSC_0687 by Dr NCX, on Flickr
« Last Edit: February 15, 2019, 08:38:58 pm by NCX »