你的RTX显卡又变强了:DLSS 4.5 光线重建,老卡这次真没被抛下

📡 AI News 2026-09-07 4 min read

Your RTX graphics card just got stronger: DLSS 4.5 Ray Reconstruction — this time, older cards truly weren't left behind. Nvidia has always said that buying an RTX card means buying into an entire AI rendering ecosystem. That claim was backed up once again this week — DLSS 4.5's Ray Reconstruction (the model responsible for "AI pixel filling" in ray-traced games) officially launched, and it spans from the RTX 20 series all the way to...

💡 What You Will Learn

Your RTX graphics card just got stronger: DLSS 4.5 Ray Reconstruction — this time, older cards truly weren't left behind. Nvidia has always said that buying an RTX card means buying into an entire AI

📜 Table of Contents

Your RTX Card Just Got Stronger: DLSS 4.5 Ray Reconstruction — Old Cards Aren't Left Behind This Time

NVIDIA has always said that buying an RTX card means buying into an entire AI rendering ecosystem. That claim paid off again this week — DLSS 4.5's Ray Reconstruction (the model responsible for "AI pixel-filling" in ray-traced games) is officially out, and it supports everything from the RTX 20 series all the way up to the RTX 50 series.

Several of my friends are still holding onto their RTX 2060s and RTX 2070s, waiting for the right moment to upgrade. This update is actually the most tangible win for them: zero cost, real visual gains.

What Exactly Is Ray Reconstruction (3-Minute Primer)

Quick background first. In games with ray tracing enabled, the GPU only samples a fraction of the light rays — the remaining pixels are left "empty," and traditional methods rely on denoisers to blur over the gaps. Ray Reconstruction handles this differently — it uses an AI model to reconstruct the unsampled pixels, working in tandem with DLSS Super Resolution.

The first generation of Ray Reconstruction already switched to the Transformer architecture (the same neural network framework behind large language models) in DLSS 4. This second generation scales the model up: 35% more compute capacity, 20% more parameters, a larger training dataset, and finer control knobs added to temporal accumulation.

In plain English: lighting is more accurate, the image is more stable during camera movement, and there's more detail in motion. The catch? Performance overhead stays essentially unchanged — that's NVIDIA's claim, and real-world benchmarks will need to wait.

Which GPUs Get the Goods (Official Comparison Table Included)

This is the section I most want you to see clearly. NVIDIA published an official support matrix that makes the feature differences across four generations instantly clear:

Feature RTX 50 Series RTX 40 Series RTX 30 Series RTX 20 Series
Dynamic Multi-Frame Generation
Multi-Frame Generation
Frame Generation
Ray Reconstruction (This Update)
Super Resolution
DLAA Anti-Aliasing

Let me translate this table for you: Multi-Frame Generation, the feature that delivers the biggest frame-rate gap, remains exclusive to the RTX 50 series — that's a hardware-level exclusive on the Blackwell architecture. Frame Generation also stops at the 40 series; the 30 and 20 series have never been able to use it due to the missing optical flow accelerator.

But pay attention to the bolded row: Ray Reconstruction in this update is green across all four generations. In other words, whether you're holding a 2060 or a 5090, you're getting the exact same second-generation Transformer model after downloading the update. Old-card users are essentially getting free money here — frame rates unchanged, but image quality gets a genuine bump.

How to Enable It (Manual Required — Don't Wait for Auto-Push)

Right now, this feature lives in the Early Access channel of the NVIDIA App, with the full release coming in September:

  1. NVIDIA App → Settings → About, check the Early Access box
  2. Graphics → Driver Settings → DLSS Override – Model Preset, select "Recommended" or "Preset F"

One thing where they clearly put in engineering effort: even the setup is designed to be low-maintenance — just pick "Recommended" and you don't have to research preset numbers yourself.

Which Games Support It (30 Titles at Launch)

Cyberpunk 2077, Alan Wake 2, Hogwarts Legacy, Marvel's Spider-Man 2, Indiana Jones, DOOM: The Dark Ages, Call of Duty: Black Ops 7, Star Wars Outlaws, plus online titles like Naraka: Bladepoint and War Thunder — 30 games in total. Full ray tracing and path tracing heavyweights benefit the most; traditional rasterized games won't use this feature.

The same NVIDIA App update also brings per-game Resizable BAR toggles, G-SYNC Pulsar settings, and borderless window support.

My Take

NVIDIA's optimization work has never stopped — sustained investment in the vendor software stack is the real reason old cards hold their value. This time, NVIDIA rolled the second-generation model out to every RTX card, and Jensen's goodwill is evident. Of course, numbers like 35% and 20% are official claims — actual performance is something you'll need to experience yourself.

Which generation is your RTX card? Have you tried the free DLSS 4.5 upgrade? Drop a comment and let's talk.

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