TCL Q77K Gaming Input Lag Tested: 144Hz TV Fast Enough?

Do you want a big gaming TV that feels fast but does not cost much? The TCL Q77K is one of the cheapest 144Hz TVs you can buy right now. People mostly talk about its price. Gamers care about something else first: input lag.

Input lag decides whether a parry lands in time or a headshot misses. In this post, we look at the TCL Q77K’s input lag test results, its VRR support, how it does with consoles, and where it falls short. Read on before you buy, because some of the results may surprise you.

In a Nutshell

• Input lag is very low. Lab testing by RTINGS describes the Q77K’s input lag as incredibly low with all supported formats. It measured 3.2 ms at 1080p 240Hz and 4.7 ms at 1080p 144Hz. Most players will feel no delay at all.
• High refresh rates come at a budget price. The TV runs at up to 4K 144Hz or 1080p 288Hz on HDMI ports 1 and 2. That is rare for a TV that Costco sells for about $400 in the 65 inch size.
• Full VRR support. It works with HDMI Forum VRR, FreeSync, and GSYNC Compatible. PS5 and Xbox Series X owners get every gaming feature, including ALLM and 4K 120Hz.
• Motion and HDR are the weak spots. Response time is mediocre, especially at 60Hz. HDR brightness is low and there is no local dimming, so dark games look washed out.
• Best for competitive and casual gamers on a tight budget. If speed matters more than picture punch, the Q77K is a great deal. If you want vivid HDR, look at a Mini LED model.

TCL Q77K: A Quick Look at This Costco Gaming TV

The TCL Q77K is an entry level 4K QLED TV from TCL’s 2025 lineup. In North America it is a Costco exclusive. It comes in 55, 65, 75, 85, and 98 inch sizes.

The TV uses a VA panel with quantum dot color. It runs Google TV on a MediaTek Pentonic 700 chip. That is the same chip family TCL uses in its pricier gaming models.

Price is the big story. Costco lists the 65 inch model at $400 for a promotion running through late October 2026. The deal also adds an Allstate plan, so you get five years of total coverage. For a 144Hz TV, that value is hard to beat.

The Q77K supports Dolby Vision, HDR10+, HDR10, and HLG. It also has eARC for soundbars and a voice remote. The feet can sit in two positions, which you usually only see on more expensive TVs.

The feet lift the screen about 3.6 inches. Most soundbars fit under it without blocking the picture. The build is mostly plastic, but it feels solid enough for the price.

Note: because the Q77K is a Costco exclusive, it has no official Amazon listing. The alternatives below are all available on Amazon if you would rather shop there.

How We Read the Input Lag Tests

Input lag is the time between pressing a button and seeing the action on screen. It is measured in milliseconds (ms). A lower number means a more responsive TV.

Most people cannot feel input lag under about 15 ms. Competitive players in shooters and fighting games prefer under 10 ms. Anything above 30 ms starts to feel sluggish.

The figures in this post come from independent lab testing by RTINGS. They test with a special device that sends a signal and times when it shows up on screen. This gives repeatable, fair numbers.

Testers measure input lag at several resolutions and refresh rates. That matters because a TV can be fast at 1080p 120Hz and slower at 4K 60Hz. You need to know the number for the way you play.

The tests use Game Mode, which turns off most extra image processing. Processing makes video look smoother but adds delay. Outside Game Mode, almost every TV shows much higher lag.

One more thing to keep in mind is that input lag and response time are different specs. Input lag is about delay. Response time is about how fast pixels change color, which affects blur. We cover both below, because both shape how a game feels.

TCL Q77K Input Lag Results at Every Resolution

Here is the headline. RTINGS rates the Q77K as having incredibly low input lag with all supported formats. That covers 1080p, 1440p, and 4K signals at every refresh rate it supports.

The two published extra measurements stand out. At 1080p 240Hz, the lag is just 3.2 ms. At 1080p 144Hz, it is 4.7 ms. Those numbers rival dedicated gaming monitors.

At 4K 120Hz and 4K 144Hz, the lag stays very low too. These are the modes most PS5, Xbox, and PC players will use. You get sharp 4K and quick response at the same time.

At 4K 60Hz, the lag goes up a little, because each frame lasts longer. It still sits comfortably in the range where casual and most serious players feel nothing. Slower games like RPGs and sports titles play smoothly.

What does this mean in real play? Fighting game inputs feel instant. Rhythm games stay in sync. Shooters feel snappy, and your aim follows your hand.

The most important tip is to use Game Mode. Outside Game Mode, the TV adds processing that raises lag a lot. Luckily, the Q77K supports Auto Low Latency Mode, so consoles switch it on for you.

Top 3 Alternative for TCL Q77K

The Q77K is fast, but its HDR is weak. These three TVs keep low input lag and add much better brightness and contrast. They also sell on Amazon.

Last update on 2026-09-13 / Affiliate links / Images from Amazon Product Advertising API

The TCL QM6K is the natural step up. It uses QD Mini LED with local dimming, so blacks look deeper and highlights pop. It keeps the 144Hz refresh rate and full VRR support.

For many gamers, the QM6K is the sweet spot. You get most of the Q77K’s speed with a much richer HDR picture. Dark games like horror titles look far better.

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The TCL QM7K goes further. It offers 4K 144Hz and 1080p 288Hz with VRR on two HDMI 2.1 ports, much like the Q77K. It adds an anti reflective screen and much higher peak brightness.

RTINGS calls the QM7K a solid TV for gamers with very low input lag. It also handles motion better than many rivals. This is the pick for bright living rooms.

Last update on 2026-09-13 / Affiliate links / Images from Amazon Product Advertising API

The Hisense U7 (U75QG) is a strong rival from another brand. It has a native 165Hz panel, VRR up to 288Hz, and up to 3000 nits of brightness. It is a great choice if you play on a PC.

All three cost more than the Q77K. But if HDR matters to you, the extra money buys a clearly better picture.

144Hz and 288Hz: What High Refresh Means for You

Refresh rate is how many times the screen updates each second. The Q77K has a native 144Hz panel. Most budget TVs stop at 60Hz.

A higher refresh rate makes motion look smoother. Camera pans in shooters feel cleaner. Your aim also feels more connected to your mouse or stick.

The Q77K can also reach 1080p at 288Hz. TCL uses a trick that lowers the resolution to double the refresh rate. This helps esports players who care more about speed than detail.

There is a catch. Only HDMI ports 1 and 2 support these high refresh rates. Ports 3 and 4 are HDMI 2.0 and top out at 60Hz.

Plug your PS5, Xbox, or gaming PC into port 1 or 2. Use ports 3 and 4 for a streaming stick, cable box, or older consoles. This simple step makes a big difference.

Consoles mostly top out at 120Hz. So the 144Hz and 288Hz modes matter most for PC gamers. Console players still benefit, because 120Hz games run at full speed with headroom to spare.

High refresh also lowers input lag. Each frame shows up sooner, so your actions appear faster. That is why the 1080p 240Hz result hits just 3.2 ms.

VRR Support: FreeSync, GSYNC, and HDMI Forum VRR

Variable refresh rate, or VRR, matches the TV’s refresh rate to your game’s frame rate. Without it, you see screen tearing when frame rates drop. With it, motion stays smooth.

The Q77K supports all three major formats. It works with HDMI Forum VRR, AMD FreeSync (Premium Pro), and Nvidia GSYNC Compatible. That covers PS5, Xbox, and almost any gaming PC.

On ports 1 and 2, VRR works up to 144Hz at 4K and 288Hz at 1080p. That wide range lets the TV handle frame drops very well. Games stay nearly tear free even in heavy scenes.

Ports 3 and 4 are a different story. They only support VRR up to 60Hz. That range is too narrow for Low Framerate Compensation, so you may see tearing below 48 fps.

There is one quirk worth knowing. With VRR on, the TV changes its overdrive behavior based on frame rate. Between about 65 and 100 fps, testers saw more overshoot, which shows up as faint bright trails behind moving objects.

Most people will not notice this in fast action. If you do, try capping your PC frame rate above 100 fps or at 60 fps. Console games that run at a locked 60 or 120 fps also avoid that zone.

PS5 and Xbox Series X Performance

Console gamers get a lot from the Q77K. It is fully compatible with every PS5 gaming feature. That includes 4K 120Hz, 1440p 120Hz, HDR, and HDMI Forum VRR.

The Xbox Series X and S get the same full support. The TV also handles Dolby Vision gaming and FreeSync Premium Pro on Xbox. Few TVs at this price offer both.

Both consoles can trigger Auto Low Latency Mode (ALLM). When you start a game, the TV jumps into Game Mode by itself. You never have to dig through menus.

Connect your console to HDMI port 1 or 2. Then turn on 120Hz output in your console settings. On PS5, also turn on VRR in the Screen and Video menu.

Games like Call of Duty, Fortnite, and Rocket League run at 120 fps on these consoles. On the Q77K, they feel quick and fluid. The low input lag keeps your inputs crisp.

Slower games that run at 30 or 60 fps still play fine. You will see more blur in those, though, which we cover in the response time section. For 120 fps modes, the Q77K shines.

If you own both consoles, you have two HDMI 2.1 ports for them. A soundbar on eARC can share port 1 or 2 without trouble, so plan your cables before you set up.

PC Gaming on the TCL Q77K

PC gamers get the most out of the Q77K’s speed. With a capable graphics card, you can run 4K at 144Hz. You can also drop to 1080p at up to 288Hz for esports titles.

GSYNC Compatible works with Nvidia cards. FreeSync works with AMD cards. Both give you smooth, tear free play across a wide frame rate range.

There is one drawback for desktop use. The TV uses a BGR subpixel layout instead of the usual RGB. This can make small text look slightly fuzzy on Windows.

For games and videos, BGR causes no problems. For spreadsheets or web browsing, some people will notice the text issue. Running ClearType tuning in Windows can help a little.

Another point is distance. A 55 or 65 inch screen works best from a couch, not a desk. Sit back a few feet to enjoy the size without straining your eyes.

The 1080p 240Hz mode at 3.2 ms is perfect for fast shooters like Valorant or Counter Strike 2. You trade sharpness for speed. Many competitive players happily make that trade.

For story games like Cyberpunk 2077, run 4K at 60 to 120 fps with VRR. You get a sharp, smooth image. Just remember the HDR limits we cover next.

Response Time and Motion Blur

Low input lag does not guarantee clear motion. Response time controls how fast pixels change color. Slow pixels create motion blur and smearing.

The Q77K has a mediocre response time at its max refresh rate. RTINGS found it struggles most with near black shades. Dark scenes show more noticeable blur trails.

Brighter scenes look much better. Motion in bright areas is clearer than on rivals like the Hisense QD7N and the LG UA77. So the Q77K still beats many budget peers.

At 120Hz, motion clarity barely changes from 144Hz. That is good news for console players. Your 120 fps games look about as clear as 144Hz PC games.

At 60Hz, motion gets blurry. Testers rated motion clarity at a locked 60Hz as poor. Games capped at 60 fps will show more smearing.

The TV also lacks black frame insertion (BFI). BFI is a feature that flashes black frames to cut blur. Without it, you cannot reduce persistence blur at 60Hz.

There is also flicker to watch for. At backlight settings from 0 to 28, the TV uses low frequency PWM dimming, which can bother some people. Keep the backlight above 28 for flicker free viewing.

The bottom line is simple. Play at 120Hz or higher whenever you can. Motion looks much cleaner, and input lag drops even further.

HDR Gaming and Picture Quality in Game Mode

This is where the Q77K shows its budget roots. Its HDR peak brightness is low. Bright highlights like sunlight or explosions do not stand out.

The TV has no local dimming. It cannot dim dark parts of the screen while brightening others. As a result, dark scenes look washed out, with grayish blacks.

Game Mode does not make this worse. Brightness stays about the same as in movie modes. HDR games simply look flat and dull, whether Game Mode is on or off.

There is a small upside. Without local dimming, you never see blooming around bright objects. Subtitles and HUD elements stay clean on dark backgrounds.

SDR gaming looks fine in a moderately lit room. Color volume is okay, with good coverage of the DCI P3 color space. Colors look lively in most games.

The glossy screen is another issue. It does a poor job with reflections from lamps or windows. Only the 85 and 98 inch models get a matte coating that handles glare better.

Viewing angles are okay. Colors shift slightly toward blue from the side. For a couch shared by two or three players, it works fine.

If HDR punch matters to you, a Mini LED TV like the QM6K is a clear upgrade. If speed matters most, the Q77K still delivers where it counts.

Best Game Mode Settings for Low Input Lag

Getting the lowest input lag on the Q77K is easy. Follow these steps for the best results.

First, plug your console or PC into HDMI port 1 or 2. These ports support HDMI 2.1, 144Hz, and full VRR. The other ports limit you to 60Hz.

Second, make sure ALLM is on in the TV settings. Your console will then switch the TV into Game Mode on its own. PC users can select the Game picture mode by hand.

Third, turn on VRR in the TV menu and in your console or graphics driver. This removes tearing and keeps lag low when frame rates change.

Fourth, set your console to output 120Hz. On PS5 and Xbox, this option lives in the video settings. Choose 120Hz modes in games when they exist.

Fifth, keep motion smoothing off. Interpolation adds a lot of delay. It makes movies smoother, but it hurts gaming feel.

Sixth, set the backlight above 28. This avoids PWM flicker that can cause eye strain or image duplication. A higher backlight also helps with the TV’s limited brightness.

Finally, keep the TV’s firmware updated. TCL often pushes updates that fix gaming bugs. Check for updates in the Google TV system menu.

With these settings, the Q77K delivers its best possible speed. You will feel the difference right away.

Pros and Cons of the TCL Q77K

Here is a clear look at what the TV does well and where it falls short for gamers.

Pros

• Incredibly low input lag in every format. Lab tests show 3.2 ms at 1080p 240Hz and 4.7 ms at 1080p 144Hz. Every game feels instant and responsive.
• Native 144Hz panel with 288Hz at 1080p. You get monitor style refresh rates on a big screen. This is very rare at a budget price.
• Full VRR support across all formats. HDMI Forum VRR, FreeSync Premium Pro, and GSYNC Compatible all work. PS5, Xbox, and PC gamers are all covered.
• Complete console feature support. ALLM, 4K 120Hz, 1440p 120Hz, and Dolby Vision gaming on Xbox all work. Setup takes minutes.
• Excellent value with long coverage. The 65 inch model sells for about $400 at Costco. The bundle includes five years of total protection.

Cons

• Weak HDR brightness. Highlights do not pop, and bright scenes look flat. HDR games lose much of their impact.
• No local dimming. Dark scenes look washed out with raised blacks. Horror and space games suffer the most.
• Blurry motion at 60Hz. Response time is mediocre, and there is no black frame insertion. Games locked at 60 fps show visible smearing.
• Only two HDMI 2.1 ports. Ports 3 and 4 max out at 60Hz with limited VRR. You must plan which devices go where.
• Glossy screen on most sizes. Reflections are distracting in bright rooms. Only the 85 and 98 inch models get a matte finish.

Is the TCL Q77K Worth It for Gamers?

For most budget gamers, the answer is yes. The Q77K delivers speed that usually costs much more. Its input lag results match TVs at twice the price.

It suits competitive players very well. Shooters, fighting games, and racing games all benefit from its low lag and high refresh rate. The 1080p 288Hz mode is a bonus for PC esports fans.

It also suits casual console gamers on a tight budget. You get 4K 120Hz, VRR, and ALLM on PS5 and Xbox. Setup is simple, and games feel smooth.

It is not the best pick for HDR fans. If you love dark, cinematic games, the lack of local dimming will bother you. The low brightness also hurts in bright rooms.

Think about how you play. If you mostly play fast games at 120 fps, the Q77K is a steal. If you mostly play 60 fps story games in HDR, spend more on a Mini LED TV.

Room lighting matters too. In a dim or controlled room, the Q77K looks decent. In a sunny living room, a brighter model with an anti reflective screen works better.

Overall, the TCL Q77K proves that low input lag does not need a high price. It nails the most important gaming spec. Just go in knowing its picture limits, and you will likely be very happy.

Frequently Asked Questions

What is the input lag of the TCL Q77K?

The TCL Q77K has incredibly low input lag in all supported formats. Lab testing measured 3.2 ms at 1080p 240Hz and 4.7 ms at 1080p 144Hz. Lag at 4K 120Hz is also very low in Game Mode.

Is the TCL Q77K good for PS5?

Yes. It supports every PS5 gaming feature, including 4K 120Hz, 1440p 120Hz, HDR, and HDMI Forum VRR. It also supports ALLM, so Game Mode turns on by itself.

Does the TCL Q77K support 144Hz?

Yes. The Q77K has a native 144Hz panel. It runs 4K at 144Hz and 1080p at up to 288Hz on HDMI ports 1 and 2.

Does the TCL Q77K have local dimming?

No. The Q77K does not have local dimming. This keeps blooming away, but dark scenes look washed out and contrast is limited.

Which HDMI ports should I use for gaming?

Use HDMI port 1 or 2. These are the HDMI 2.1 ports with 144Hz and full VRR support. Ports 3 and 4 are limited to 60Hz.

Is the TCL Q77K sold on Amazon?

No. In North America, the Q77K is a Costco exclusive. On Amazon, the closest options are the TCL QM6K and QM7K.

Is the TCL Q77K better than the TCL QM6K for gaming?

Both TVs have similar speed and 144Hz support. The QM6K adds Mini LED local dimming, so HDR and dark scenes look much better. The Q77K costs less and suits gamers who care most about input lag.