Our Verdict
The Vizio P Series Quantum X is an excellent TV for most uses. It looks great in almost any room but has narrow viewing angles, so it isn't as good for watching sports with a group of friends or playing co-op games. Fast movies and games look great, thanks to the fast response time, and games are responsive due to the low input lag.
- Outstanding peak brightness in SDR and HDR.
- Deep, uniform blacks.
- Great motion handling.
- Image degrades when viewed at an angle.
This is an excellent TV for watching movies in a dark room. It has an excellent contrast ratio and a great local dimming feature, so it delivers deep, uniform blacks. Fast-moving action scenes look great, with very little blur, thanks to the fast response time, although this lack of blur does result in a bit more noticeable stutter. This TV also gets extremely bright in both SDR and HDR. Unfortunately, lower resolution movies don't look quite as good, as the 480p upscaling isn't as good as most other TVs.
The is a great TV for watching your favorite TV shows during the day. It has excellent reflection handling and can get extremely bright, so glare should never be an issue, even in an extremely bright room. This TV also has a good selection of built-in apps, covering some of the most popular streaming apps, but it isn't possible to add more apps. Unfortunately, due to the poor viewing angle, this TV is best enjoyed from directly in front, so it isn't a great choice if you like to move around with the TV on. Cable content also doesn't look quite as good on this TV, as the 720p upscaling isn't as good as most other brands.
Overall, this is a great TV for watching sports. The P Series Quantum X can get extremely bright and has great reflection handling, so there shouldn't be any issues with glare in a bright room. It has an excellent response time, so fast-moving objects, like the players, look great, with very little blur behind them. Unfortunately, this TV isn't well-suited for watching the big game with a group of friends, as the image degrades when viewed at an angle.
This is an excellent TV for playing video games. It has excellent low input lag for a responsive gaming experience, and it delivers very smooth motion with very little blur behind fast-moving objects. This TV also looks great in almost any room, as it can easily handle glare in a bright room, and also has excellent contrast for late-night gaming. Unfortunately, it doesn't support any advanced gaming features, like FreeSync. This TV also isn't as well-suited for co-op gaming, as the image degrades when viewed at an angle.
The P Series Quantum X is an excellent TV for watching HDR movies in a dark room. It looks great in a dark room, as it has excellent contrast and a great local dimming feature. This is a remarkably bright TV, and small highlights in some scenes in HDR really stand out, the way the creator intended. This TV also has an outstanding color gamut and great color volume. Fast-moving objects look great, thanks to the fast response time, but this does result in a bit more noticeable stutter when watching movies.
This is an excellent TV for HDR gaming. It has excellent low input lag, delivering a responsive gaming experience, and fast-moving objects in your favorite games look great, thanks to the fast response time. HDR games can get extremely bright, and they look great in a dark room, thanks to the excellent contrast ratio. Unfortunately, it lacks any advanced gaming features, like support for FreeSync variable refresh rate.
Overall, this is an excellent TV for use as a PC monitor. It has a fast response time, so there is little distracting blur trail around fast-moving objects, and it has excellent low input lag for a responsive experience. It can also get extremely bright and has excellent reflection handling, so it has no issues overcoming glare. Unfortunately, this TV has a poor viewing angle, and the sides of the screen appear non-uniform if you're sitting too close.
Changelog
- Updated May 21, 2020: Converted to Test Bench 1.5.
- Updated Feb 21, 2020: Converted to Test Bench 1.4.
- Updated Jul 08, 2019: Review published.
- Updated Jul 06, 2019: Our testers have started testing this product.
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Differences Between Sizes And Variants
We tested the 65" Vizio P Series Quantum X (PX65-G1), and we expect our results to be valid for the 75" (PX75-G1) model as well.
If someone comes across a different type of panel or if their Vizio P Series Quantum X doesn't correspond to our review, let us know and we will update the review. Note that some tests, such as the gray uniformity, may vary between individual units.
| Size | Model | Dimming Zones |
| 65" | PX65-G1 | 384 |
| 75" | PX75-G1 | 480 |
We don't know the manufacturing date of our PX65-G1, but the label is available here.
Popular TV Comparisons
The Vizio P Series Quantum X is an excellent TV for most uses, and it outperforms many pricier models. See our recommendations for the best TVs, the best 4k TVs, the best 4k gaming TVs.
The Vizio P Series Quantum X 2019 is a bit better than the Vizio P Series 2018. The X 2019 can handle reflections a little better when in a bright room. It has more dimming zones, which results in better contrast with local dimming, which is important for dark room performance. The X 2019 can also get much brighter in HDR.
The Vizio P Series Quantum X 2019 is a bit better than the Sony X900F. The Vizio has slightly better reflection handling, a better black frame insertion feature, can get brighter, and has a much lower input lag. The X900F has better accuracy before calibration and much better smart features that give you access to a vast selection of apps through the Google Play Store.
The Vizio P Series Quantum X 2019 and the Vizio P Series Quantum 2018 are nearly identical. The Quantum X has a slightly wider color gamut. The Quantum X has nearly double the local dimming zones, and although the overall performance is similar, the new model has less noticeable blooming around bright objects. Any other differences between them can larger be attributed to panel variance, and do not necessarily represent a real difference.
The Vizio P Series Quantum X 2019 is a slightly better TV than the Vizio M Series Quantum 2019 for most uses. The Quantum X looks more premium and well-built and has a few more input options. It's a much better choice if you watch a lot of HDR movies or game in HDR, as its screen can get significantly brighter, especially with HDR content. Its brighter screen also makes it better suited for very well-lit rooms as it shows much fewer reflections. On the other hand, the M Series Quantum has better black uniformity, much more accurate colors out of the box, much better gradient performance, and better built-in speakers.
We buy and test dozens of TVs yearly, taking an objective, data-driven approach to deliver results you can trust. Our testing process is complex, with hundreds of individual tests that take over a week to complete. Most of our tests use specially designed test patterns that mimic real content, but we also use the same sources you have at home to ensure our results match the real-world experience. We use two main tools for our testing: a Colorimetry Research CR-100 colorimeter and a CR-250 spectroradiometer.
Test Results
Older Test Bench: This product has been tested using an older TV test methodology, before a major update. Some of the test results below aren't directly comparable with other TVs. Learn more
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