Jpineo92

Aug 11, 2023 02:52 PM By  Pierre-Olivier Jourdenais

The TV’s response time behavior changes dramatically as the TV’s refresh rate goes up and down, which is what VRR does; VRR makes the TV match its refresh rate with the content’s frame rate, as so your game’s frame rate goes up and down, so does the TV’s refresh rate. But as the TV’s refresh rate gets close to certain intervals, 60, 120, 144 etc, and then goes beyond it, its response time shifts dramatically. So for example, you could have a typical 5ms average 80% response time when your TV’s refresh rate is at 120Hz, but have a 20ms average 80% response time at 118Hz; so if the TV’s refresh rate were to go from 115 to 130 let’s say, you’d have wide swings in the TV’s response time. This could indeed lead to what would appear to be flicker if your refresh rate were to constantly and very quickly shift between two brackets, but it’s more likely to result in sudden on and off color smearing and blurring that seems to magically come and go. For that reason we recommend gamers disable VRR on this TV, as you insure yourself a consistent response time by locking the TV’s refresh rate. That said, we also did notice brightness flickering with fast-moving objects when you have both local dimming and VRR on at the same time, so that might be your issue. Anyhow, hope this helped!

Many thanks for the detailed response!

Aug 11, 2023 02:04 PM By  Pierre-Olivier Jourdenais

Hi! The TCL Q7 has really amazing black uniformity and surprisingly good low-quality content smoothing, so it has that going for it. But the R655 gets much brighter in both HDR and SDR, has a much more accurate color profile pre-calibration, and is more vibrant overall with a better color volume. The Q7 also has the same strange quirks that the TCL QM8 has, such as having issues when connected to NVIDIA graphics cards (it can’t go above 120Hz at any resolution with an NVIDIA), or having its refresh rate function in brackets, which is an issue for gamers who want to play with VRR enabled. It’s close, but the R655 is the slightly better TV overall. Hope this helps!

Could you explain what you mean by “having its refresh rate function in brackets”? Also I’ve noticed on my Q7 that gaming with an Nvidia GPU (with VRR and G-sync on) that the TV has brightness flickering when the FPS changes, is that something you guys have noticed in your tests as well or could I have received a defective unit? Many thanks!