What Is Frame Generation? DLSS 4.5, FSR Redstone and XeSS 3 Explained

John saved for eight months to buy his new graphics card. On the first night, he loaded Cyberpunk 2077, turned on path tracing, and flipped one more switch: frame generation. The FPS counter jumped to 180. He grinned, grabbed his mouse, and swung the camera around.

Something felt off. The picture was glass smooth, but his aim felt slightly heavy, like moving through water. He checked the counter again. Still 180. So why did it feel like 60?

The answer is that only about 60 of those 180 frames were actually rendered by his GPU. The rest were created by AI. That is frame generation in one sentence, and once you understand how it works, you will know exactly when it makes your games better and when it quietly makes them worse.

This guide covers every frame generation technology available in 2026, including NVIDIA DLSS 4.5 Multi Frame Generation, AMD FSR Redstone, Intel XeSS 3, and the driver-level options that work in almost any game. You will also get real rules of thumb, a settings checklist, and a section most guides skip: how frame generation interacts with a CPU bottleneck.

How Does Frame Generation Work?

In normal rendering, your GPU builds every frame from scratch. If you want 120 FPS, it has to draw 120 complete images every second. Frame generation changes the deal: the GPU draws fewer real frames, and a separate step fills the gaps.

Here is what happens behind the scenes, step by step:

1. The GPU renders frame A the normal way, using the game engine.
2. The GPU renders frame B, the next real frame. Instead of showing it immediately, it holds it back for a moment.
3. The frame generator compares A and B. It reads the game’s motion vectors (where each object is moving), the depth buffer (what is in front of what), and optical flow (how pixels moved on screen, which catches shadows and reflections).
4. It builds one or more in-between frames. With 2x frame generation it creates one frame. With multi frame generation it creates two, three, or even five.
5. The frames are paced and shown in order: A, then the generated frames, then B. A frame-pacing system spaces them evenly so motion looks smooth.

The key detail is step 2. Because the generator needs the next real frame before it can fill the gap, every frame you see is shown slightly later than it would be without frame generation. That is where the extra input lag comes from.

Interpolation vs AI: Not All Frame Generation Is the Same

Older methods use analytical interpolation: a fixed algorithm that blends pixels along motion vectors. FSR 3 and Lossless Scaling work this way. Newer methods use a trained neural network to predict the in-between frame, which handles tricky areas (UI, particles, thin objects) much better. DLSS 4 and newer, FSR Redstone on RX 9000 cards, and XeSS frame generation are AI-based.

One thing no frame generator can do is read your inputs. A generated frame is built from frames that already exist, so your mouse movement only shows up in the next real frame. That is why Hamza’s game looked like 180 FPS but responded like 60.

Every Frame Generation Technology in 2026

There are two families of frame generation. In-game frame generation is built into the game by the developer, giving it access to motion vectors, depth data, and a clean UI layer. Driver-level frame generation is switched on in your GPU software and works in games that never added support, at some cost to quality.

NVIDIA: DLSS 3, DLSS 4 and DLSS 4.5

NVIDIA started the frame generation era in 2022 with DLSS 3 on the RTX 40 series. DLSS 4, launched with the RTX 50 series in January 2025, replaced the optical flow hardware approach with a faster AI model and added Multi Frame Generation (up to 3 generated frames per real frame). According to NVIDIA, over 250 games and apps support DLSS 4 with Multi Frame Generation as of CES 2026.

DLSS 4.5 went further. It added a 6x mode and Dynamic Multi Frame Generation, which changes the multiplier during gameplay to hit your target frame rate or your monitor’s refresh rate. Both features are RTX 50 exclusives. RTX 40 owners still get 2x DLSS frame generation. RTX 20 and 30 owners get none from DLSS, but can use FSR or XeSS frame generation in supported games.

Smooth Motion is NVIDIA’s driver-level option. It works on RTX 40 and RTX 50 cards and covers DirectX 11 and 12 games that have no native DLSS frame generation. Enable it in the NVIDIA app under per-game graphics settings.

AMD: FSR 3, FSR Redstone and AFMF

AMD’s first frame generation arrived with FSR 3 in September 2023. It uses analytical interpolation (no AI) and runs on regular shader cores, which is why it also works on many NVIDIA and Intel cards. AMD lists RX 5000 series and newer for FSR 3 frame generation.

In December 2025, AMD launched FSR Redstone for the RX 9000 series. Its frame generation now uses machine learning for cleaner detail and fewer artifacts. On an RX 9000 card, AMD Software can upgrade games shipping FSR 3.1.4 frame generation to the new ML version automatically. See the AMD FSR page for the current game list. AMD Fluid Motion Frames (AFMF) is a separate driver-level feature that works on RX 6000 cards and newer for games with no FSR frame generation at all.

Intel: XeSS 2 and XeSS 3

Intel added frame generation with XeSS 2 and multi frame generation with XeSS 3, which can insert up to 3 generated frames between real ones. Unlike NVIDIA, Intel brought multi frame generation to older hardware too: Arc A series, Arc B series, and Arc graphics in Core Ultra laptops. XeSS frame generation always runs with XeLL, Intel’s latency reducer. Full details are on Intel’s XeSS page.

Lossless Scaling

Lossless Scaling is a low-cost Steam app that adds frame generation to almost anything on screen, including older games, emulators, and windowed apps, on any GPU. Quality and latency are behind in-game DLSS or FSR, but it is the most flexible option and a favorite on handheld PCs.

Frame Generation vs Native FPS: What You Really Get

Two PCs can show the same number on the FPS counter and feel completely different. Here is a side-by-side of the same 120 FPS reading reached three ways:

The Hidden Cost: Frame Generation Lowers Your Base FPS

This is the part almost every guide leaves out. Creating frames costs GPU time, so turning on frame generation reduces the number of real frames your GPU can render. A typical example: your game runs at 60 FPS native. You enable 2x frame generation. The overhead drops your real frame rate to about 50–55 FPS, and the counter shows about 100–110, not a perfect 120. The overhead is larger at 4K, on lower-end cards, and with multi frame generation. It is smaller when your GPU has spare headroom.

Why Your FPS Counter Says 200 but the Game Feels Like 60

Most overlays count every frame sent to the monitor, real or generated. To see what your GPU is really doing, look for a separate “rendered FPS” or “PC latency” readout. The NVIDIA app overlay, AMD Software metrics, Intel’s overlay, and tools like PresentMon can all show this. If the latency number is high, the game will feel slow no matter what the FPS counter says.

Does Frame Generation Add Input Lag?

Yes. Every type of frame generation adds some input lag, because the GPU has to hold back the next real frame before it can show the generated one. At a 60 FPS base, that delay is roughly one frame (about 16 ms) plus a little processing time. At a 30 FPS base it doubles to about 33 ms. New to the topic? Read our full guide on what input lag is and how to test it.

The good news is that all three GPU makers pair frame generation with a latency reducer, and you should always keep it on:

Does Multi Frame Generation Add More Lag Than 2x?

Only a little. The big latency cost comes from holding back one real frame, and that happens once whether you generate 1 or 5 frames in between. Multi frame generation adds a small amount of extra processing. The bigger risk is behavioral: people use 4x or 6x to turn a low base FPS into a big number, and a low base FPS is what really hurts responsiveness. Understanding 1% low FPS helps here — frame generation can mask stutter on paper without fixing it.

Frame Generation Artifacts and How to Fix Them

Generated frames are predictions, and predictions are sometimes wrong. The faster the motion and the lower the base frame rate, the bigger the gap the generator has to guess across and the more mistakes you see.

Two tips fix most problems. First, keep the base frame rate high (60 FPS or more), because a smaller gap between real frames means an easier guess. Second, prefer in-game frame generation over driver-level options like Smooth Motion, AFMF, or Lossless Scaling, because only the game can tell the generator where the HUD is.

Frame Generation and CPU Bottlenecks: The Use Case Nobody Talks About

Most people think of frame generation as a fix for a weak GPU. In practice, it often shines brightest when your CPU is the bottleneck.

Here is why. Every real frame needs work from both the CPU (game logic, physics, AI, draw calls) and the GPU (drawing pixels). A generated frame needs no CPU work at all. It is made entirely on the GPU from frames that already exist.

Picture this: you play a city builder, a flight simulator, or a big open-world game. Your CPU tops out at 55 FPS while your GPU sits at 60% usage, waiting. Lowering graphics settings does nothing, because the GPU was never the problem. Turn on frame generation and the idle GPU gets to work, doubling output to around 100 FPS with almost no overhead — since it had spare headroom. Not sure what is holding your PC back? Run your components through our free PC bottleneck calculator before deciding whether frame generation, an upscaler, or an upgrade is the right fix.

One caution: frame generation does not fix stutter. If a real frame takes 50 ms because the CPU hitched, the generated frames around it are delayed too, and you still feel the hitch. Fix the cause first.

When to Use Frame Generation (and When to Turn It Off)

The single most important number is your base frame rate: the FPS you get with frame generation turned off. Use this table as your starting point:

How to Enable Frame Generation (NVIDIA, AMD and Intel)

Always try the in-game option first. Driver-level frame generation is the fallback for games that do not support it. Menu names vary: look for “Frame Generation,” “DLSS Frame Generation,” “FSR Frame Generation,” or “XeSS Frame Generation” in the graphics or display settings.

NVIDIA (RTX 40 and RTX 50)

1. Update to the latest Game Ready driver and NVIDIA app.
2. In the game, set DLSS Super Resolution to Quality or Balanced first. A healthy base frame rate matters more than anything else.
3. Turn on DLSS Frame Generation. On RTX 50 cards, pick the multiplier (2x, 3x, 4x) or Dynamic if the game offers it.
4. Confirm NVIDIA Reflex is on — it enables automatically with DLSS frame generation in most games.
5. For games without DLSS frame generation, open the NVIDIA app, select the game under Graphics, and enable Smooth Motion.

AMD (Radeon)

1. Update AMD Software: Adrenalin Edition.
2. In the game, enable FSR upscaling and FSR Frame Generation, then turn on Anti-Lag 2 if the game offers it.
3. On an RX 9000 card, check AMD Software for the ML upgrade toggles so supported games use FSR Redstone’s AI frame generation.
4. For games with no frame generation at all, enable AMD Fluid Motion Frames in AMD Software. Turn V-Sync off in the game for AFMF to work properly.

Intel (Arc)

1. Update to the latest Arc driver and Intel Graphics Software.
2. In the game, enable XeSS Super Resolution and XeSS Frame Generation. XeLL turns on with it automatically.
3. Use the frame generation override in Intel Graphics Software to choose 2x, 3x or 4x in supported games.

Frame Generation FAQ

Final Verdict: Is Frame Generation Right for You?

Remember John and his 180 FPS that felt like 60? He did not need to turn frame generation off. He needed to fix his base frame rate. He switched DLSS Super Resolution from Ultra Performance to Balanced, lowered path tracing one notch, and dropped from 4x to 3x on his 165 Hz monitor. His real frame rate rose to about 70 FPS, the counter settled near his refresh rate, and the heavy feeling disappeared.

That is the whole lesson of frame generation in 2026. It is one of the best tools PC gaming has ever had for smoothness — from DLSS 4.5 on RTX 50 cards to FSR Redstone on Radeon and XeSS 3 on Arc. But it multiplies what you already have. Start from a solid base frame rate, keep your latency reducer on, and use it where smoothness matters more than reaction time. Before you change any setting, find out what is really limiting your PC with our free PC bottleneck calculator.

Related Guides

• What Is DLSS? How It Works and When to Turn It On
• DLSS vs FSR: Which Upscaler Should You Use?
• What Is Input Lag? Causes, Tests and Easy Fixes
• What Is 1% Low FPS? Why It Matters More Than Average FPS