How NVIDIA’s Reflex technology works – InformTFB

How NVIDIA’s Reflex technology works

How NVIDIA’s Reflex technology works

In addition to ray tracing and AI-based DLSS 2.0 anti-aliasing, modern video games (in particular, Fortnite) also support NVIDIA Reflex technology, which is designed to reduce the system delay that occurs between pressing a button and displaying an action on the screen (for example: you pressed the mouse button — a shot was fired).

Measuring the “input delay” is not easy, so NVIDIA Reflex uses a set of software and hardware tools. First, let’s talk about the new 360-Hz monitors for eSports with the G-Sync module, which runs Reflex Latency Analyzer. In addition to the obvious advantages of a high refresh rate in competitive games, the” delay analyzer ” integrated in the display allows you to measure the delay of supported mice that connect to the monitor, the delay of the PC and the delay in displaying the frame on the display.

All these statistics are displayed via the GeForce Experience interface. By analyzing delays at different stages, eSports players and professional players can improve their tactics, optimize game settings, or build a PC with the lowest latency.

Which video cards support NVIDIA Reflex and how to enable it

Now let’s talk about the NVIDIA Reflex software component, which reduces system latency and, as a result, makes management more responsive. First of all, the NVIDIA Reflex technology itself is supported by all cards, starting with the Maxwell generation (900-series cards), and does not require a G-Sync monitor or any other hardware other than an NVIDIAvideo card . To get responsive controls in a Reflex-enabled game, just go to the game’s graphics settings and enable the corresponding option.

How the NVIDIA Reflex technology works: we analyze it in practice

When performance is limited to the CPU, the CPU prepares commands for the graphics card with a margin of 1-3 frames (processes game data, calculates ballistics, and prepares command lists for the graphics adapter). To do this, you have to capture control for several frames in a row, process physics and game logic on the processor for several frames in advance, and wait for the video card to display all these frames on the display. As a result, delays increase several times and the responsiveness of the control decreases. NVIDIA’s Reflex tools allow developers to get rid of this multi-frame queue.

Using the Reflex tools, the game engine starts preparing commands on the processor a few milliseconds before the video card finishes rendering the current frame. Such smart scheduling eliminates the queue of multiple frames for rendering — control is captured for a single frame, the processor considers game logic and physics for a single frame, creates a list of drawing commands for the GPU, and immediately transmits these commands to the video card without any queue. This reduces the system latency by several times.

Which games support NVIDIA Reflex

Currently, NVIDIA Reflex is supported in Fortnite, Valorant, Call of Duty: Warzone, Call of Duty: MW 2019, Call of Duty: Cold War, Destiny 2, and Apex Legends. In the near future, support for the technology will appear in the network shooters Overwatch and Rainbow Six: Siege. And Warzone, by the way, will soon receive support for DLSS 2.0, which should lead to an even larger frame rate for smooth gaming.


Share your thoughts in the comments section on what you think about NVIDIA’s Reflex technology. Let’s discuss: is this technology worth the candle? Or is this just another marketing ploy to improve sales of 144/240/360-Hz monitors? What do you think?

Valery Radokhleb
Valery Radokhleb
Web developer, designer

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