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Better Gaming TV: P-Series Quantum vs. P-Series Quantum X

In 2020, VIZIO released the new P-Series Quantum and P-Series Quantum X. So, which of these similarly-named television sets are the best at displaying videogames on the PlayStation 5, Xbox Series X, Xbox Series S as well as other home consoles? You can find out in this comparison guide.

Quick Summary

When compared to the 2020 VIZIO P-Series Quantum Series, the 2020 VIZIO P-Series Quantum X has a noticeable advantage when it comes to HDR brightness levels. The input lag in game mode is pretty much identical for both television sets.

When it comes to support for the PS5 and Xbox Series consoles, the two TVs come with HDMI 2.1 ports, 120Hz refresh rate and variable refresh rate. With that said, there are currently issues with playing games at 120 frames per second and variable refresh rate in both 1080p and 1440p (although these features are functioning normally in 4K).

If you are interested, you can purchase either of the two gaming TVs on Amazon with the following links:

P-Series Quantum vs. P-Series Quantum X Comparsion Chart

 VIZIO P-Series Quantum Series LED 4K UHD SmartCast TVVIZIO P-Series Quantum X Series LED 4K UHD SmartCast TV
Screen Sizes 65”: P65Q9-H1

75”: P75Q9-H1
65”: P65QX-H1

75”: P75QX-H1

85”: P85QX-H1
HDMI 2.1 Input?YesYes
Composite Input?YesYes
Antenna Input?YesYes
Wide Color GamutDCI P3 xy: 97.57%

DCI P3 uv: 98.10%

Rec 2020 xy: 77.99%

Rec 2020 uv: 82.32%
DCI P3 xy: 94.05%

DCI P3 uv: 95.13%

Rec 2020 xy: 78.12 %

Rec 2020 uv: 83.35 %
Dolby Vision?YesYes
HDR10?YesYes
HDR10+?NoNo
HDR Real Scene Peak Brightness 797 nits1039 nits
HDR Peak 2% Window1005 nits1447 nits
HDR Peak 10% Window1045 nits2043 nits
HDR Peak 25% Window783 nits1266 nits
HDR Peak 50% Window572 nits991 nits
HDR Peak 100% Window497 nits608 nits
HDR Sustained 2% Window 991 nits807 nits
HDR Sustained 10% Window 1028 nits1954 nits
HDR Sustained 25% Window 780 nits1256 nits
HDR Sustained 50% Window 571 nits989 nits
HDR Sustained 100% Window 495 nits607 nits
HDR ABL0.0440.064
Native Refresh Rate 120Hz120Hz
Variable Refresh Rate?YesYes
FreeSync?YesYes
G-SYNC?NoNo
Input Lag at 1080p/60Hz with Game Mode 13.7 ms14.1 ms
Input Lag at 1080p/120Hz with Game Mode 34.5 ms59.0 ms
Input Lag at 1080p/Variable Refresh Rate 88.7 ms34.6 ms
Input Lag at 1440p/60Hz with Game Mode 13.7 ms14.1 ms
Input Lag at 4K/60Hz with Game Mode 13.8 ms13.9 ms
Input Lag at 4K/60Hz/10-bit HDR with Game Mode 13.7 ms13.8 ms
Input Lag at 4K/120Hz with Game Mode 14.4 ms15.1 ms
Input Lag at 4K/Variable Refresh Rate 14.7 ms13.7 ms
Input Lag at 4K/60Hz/4:4:4 13.8 ms13.9 ms
Input Lag at 1080p/60Hz without Game Mode 109.4 ms109.5 ms
Input Lag at 4K/60Hz without Game Mode 109.1 ms109.2 ms
Input Lag at 4K/60Hz with Interpolation 130.4 ms122.6 ms
PricingCheck price on Amazon.Check price on Amazon.

Screen Sizes

The VIZIO P-Series Quantum Series LED 4K UHD TV is available in two screen sizes as you can pick between the 65-inch or 75-inch. The VIZIO P-Series Quantum X Series LED 4K UHD TV is available in three size options: 65-inch, 75-inch and 85-inch.

You can check out the model number for each screen size below:

P-Series Quantum Series:

  • 65”: P65Q9-H1
  • 75”: P75Q9-H1

P-Series Quantum X Series:

  • 65”: P65QX-H1
  • 75”: P75QX-H1
  • 85”: P85QX-H1

HDMI Input

Both the 2020 versions of the P-Series Quantum Series and P-Series Quantum X Series come with HDMI 2.1 ports, which are supported by the PlayStation 5, Xbox Series X and Xbox Series S for advanced display features.

Composite Input

The VIZIO PQ and PQX also comes with the yellow, red and white composite input. This means that you should be able to connect older systems that have composite input, which includes the PS1, PS2, N64, Gamecube, Wii and Xbox.

Antenna Input

Both television sets in this versus guide also come with antenna input. So, you can directly plug in even older game consoles like the NES, Super NES and Sega Genesis.

Wide Color Gamut

Both TVs also support the wide color gamut. The P-Series Quantum has better coverage over DCI P3 while the P-Series Quantum X has better coverage over Rec 2020. You can take a look at the RTINGS’ test results for the PQ and PQX below:

P-Series Quantum Series:

  • DCI P3 xy: 97.57%
  • DCI P3 uv: 98.10%
  • Rec 2020 xy: 77.99%
  • Rec 2020 uv: 82.32%

P-Series Quantum X Series:

  • DCI P3 xy: 94.05%
  • DCI P3 uv: 95.13%
  • Rec 2020 xy: 78.12 %
  • Rec 2020 uv: 83.35 %

Dolby Vision, HDR10 and HDR10+ Support

The 2020 P Series Quantum and P Series Quantum X support Dolby Vision, HDR10 and HDR10+. PlayStation 5 games will be using HDR10 while Xbox Series S and Xbox Series X games will be using Dolby Vision.

The VIZIO P-Series Quantum Series LED 4K UHD SmartCast TV on Amazon.

HDR Brightness

The P-Series Quantum X performs better overall compared to the P-Series Quantum when it comes to HDR brightness levels.

According to tests done by RTINGS, the P-Series Quantum X is brighter when it comes to HDR Real Scene Peak Brightness, HDR Peak 2% Window, HDR Peak 10% Window, HDR Peak 25% Window, HDR Peak 50% Window, HDR Peak 100% Window, HDR Sustained 10% Window, HDR Sustained 25% Window, HDR Sustained 50% Window and HDR Sustained 100% Window. With that said, the P-Series Quantum is brighter at HDR Sustained 2% Window.

We consider great HDR brightness levels to be at least 500 nits. The Quantum X is able to hit this threshold easily in all of the scenes tested. The Quantum is able to also hit this threshold in a vast majority of scenes with the exception being HDR Peak 100% Window and HDR Sustained 100% Window where it falls just slightly short.

You can find RTINGS’s full HDR brightness test results for the P-Series Quantum and P-Series Quantum X below:

HDR Real Scene Peak Brightness

  • P-Series Quantum: 797 nits
  • P-Series Quantum X: 1039 nits

HDR Peak 2% Window

  • P-Series Quantum: 1005 nits
  • P-Series Quantum X: 1447 nits

HDR Peak 10% Window

  • P-Series Quantum: 1045 nits
  • P-Series Quantum X: 2043 nits

HDR Peak 25% Window

  • P-Series Quantum: 783 nits
  • P-Series Quantum X: 1266 nits

HDR Peak 50% Window

  • P-Series Quantum: 572 nits
  • P-Series Quantum X: 991 nits

HDR Peak 100% Window

  • P-Series Quantum: 497 nits
  • P-Series Quantum X: 608 nits

HDR Sustained 2% Window

  • P-Series Quantum: 991 nits
  • P-Series Quantum X: 807 nits

HDR Sustained 10% Window

  • P-Series Quantum: 1028 nits
  • P-Series Quantum X: 1954 nits

HDR Sustained 25% Window

  • P-Series Quantum: 780 nits
  • P-Series Quantum X: 1256 nits

HDR Sustained 50% Window

  • P-Series Quantum: 571 nits
  • P-Series Quantum X: 989 nits

HDR Sustained 100% Window

  • P-Series Quantum: 495 nits
  • P-Series Quantum X: 607 nits

HDR ABL

  • P-Series Quantum: 0.044
  • P-Series Quantum X: 0.064

Native Refresh Rate

The two VIZIO 2020 televsion sets have a native refresh rate of 120 Hz. As a result, you can play games at up to 120 frames per second on PS5, Xbox Series X and Xbox Series X.

Variable Refresh Rate, FreeSync and G-SYNC Support

Both TVs support Variable Refresh Rate and FreeSync but not G-Sync. All three features are designed to make games with choppy frame rate look smoother and eliminate screen tearing.

The VIZIO P-Series Quantum X Series LED 4K UHD SmartCast TV on Amazon.

Input Lag

When it comes to input lag, the 2020 P-Series Quantum and P-Series Quantum X are pretty much dead even when the game mode is enabled at 1080p/60Hz, 1440p/60Hz, 4K/60Hz, 4K/60Hz/10-bit HDR, 4K/120Hz, 4K/VRR and 4K/60Hz/4:4:4. Both of the Vizio TVs are well below our recommended upper limit of 30 ms when it comes to getting a responsive gaming experience.

The two television sets are also currently running into issues, including noticeable input lag and outright not functioning properly, when it comes to 120Hz and variable refresh rate in 1080p and 1440p resolutions.

With the PlayStation 5, you will mostly play games at 1080p/60Hz, 1080p/120Hz, 4K/60Hz, 4K/60Hz/10-bit HDR and 4K/120Hz (1440p and variable refresh rate are not available at the launch of the system but may come in a future firmware update). With the Xbox Series S and Xbox Series X, you will mostly play games at 1080p/60Hz, 1080p/120Hz, 1080p/VRR, 1440p/60Hz, 1440p/120Hz, 1440p/VRR, 4K/60Hz, 4K/60Hz/10-bit HDR, 4K/120Hz and 4K/VRR.

You can take a look at RTINGS’ input lag tests for the P-Series Quantum and P-Series Quantum X below:

Input Lag at 1080p/60Hz with Game Mode

  • P-Series Quantum: 13.7 ms
  • P-Series Quantum X: 14.1 ms

Input Lag at 1080p/120Hz with Game Mode

  • P-Series Quantum: 34.5 ms
  • P-Series Quantum X: 59.0 ms

Input Lag at 1080p/Variable Refresh Rate

  • P-Series Quantum: 88.7 ms
  • P-Series Quantum X: 34.6 ms

Input Lag at 1440p/60Hz with Game Mode

  • P-Series Quantum: 13.7 ms
  • P-Series Quantum X: 14.1 ms

Input Lag at 4K/60Hz with Game Mode

  • P-Series Quantum: 13.8 ms
  • P-Series Quantum X: 13.9 ms

Input Lag at 4K/60Hz/10-bit HDR with Game Mode

  • P-Series Quantum: 13.7 ms
  • P-Series Quantum X: 13.8 ms

Input Lag at 4K/120Hz with Game Mode

  • P-Series Quantum: 14.4 ms
  • P-Series Quantum X: 15.1 ms

Input Lag at 4K/Variable Refresh Rate

  • P-Series Quantum: 14.7 ms
  • P-Series Quantum X: 13.7 ms

Input Lag at 4K/60Hz/4:4:4

  • P-Series Quantum: 13.8 ms
  • P-Series Quantum X: 13.9 ms

Input Lag at 1080p/60Hz without Game Mode

  • P-Series Quantum: 109.4 ms
  • P-Series Quantum X: 109.5 ms

Input Lag at 4K/60Hz without Game Mode

  • P-Series Quantum: 109.1 ms
  • P-Series Quantum X: 109.2 ms

Input Lag at 4K/60Hz with Interpolation

  • P-Series Quantum: 130.4 ms
  • P-Series Quantum X: 122.6 ms
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