Lenovo Legion Slim 5i Gen 9 RTX 4070 DLSS Setup Guide Windows 11

The RTX 4070 in your Lenovo Legion Slim 5i Gen 9 supports DLSS 3 for significantly higher frame rates in supported games. Setting up DLSS correctly in each game and ensuring the NVIDIA driver is updated gives you access to DLSS Super Resolution, DLSS Frame Generation, and NVIDIA Reflex on the Legion Slim 5i Gen 9 platform.

This guide covers DLSS enablement, driver updates, and per-game DLSS settings for the Lenovo Legion Slim 5i Gen 9 RTX 4070 in Windows 11.

“RTX 4070 in my Legion Slim 5i Gen 9 was getting 65 FPS at 1440p Ultra settings. Enabled DLSS Quality and frame rate jumped to 105 FPS at near-identical visual quality. DLSS is a must-use feature.” – Brendan, PC gaming enthusiast from Bangsar

What DLSS Features Are Available on RTX 4070 Laptop

The RTX 4070 Laptop GPU on Lenovo Legion Slim 5i Gen 9 includes all Ada Lovelace DLSS 3 features. DLSS Super Resolution renders at a lower internal resolution and uses AI to reconstruct a full-resolution image. DLSS Frame Generation uses AI to create intermediate frames between rendered frames, doubling or tripling the perceived frame rate. NVIDIA Reflex reduces system latency. DLSS Ray Reconstruction improves ray tracing quality with AI denoising.

• DLSS Quality mode – 67 percent of native resolution, reconstructed to native, near-identical image quality
• DLSS Performance mode – 50 percent of native resolution, good upscale quality, 50-70 percent more frames
• DLSS Frame Generation – generates intermediate frames using AI, doubles apparent FPS at 60+ base FPS
• DLSS Ultra Quality (where available) – 77 percent of native resolution, highest DLSS image quality

Step 1 – Update NVIDIA Driver via Lenovo Vantage

Open Lenovo Vantage and go to System Update. Check for NVIDIA driver updates – Lenovo Vantage often has a Legion-specific NVIDIA driver that includes updated DLSS model weights and Frame Generation improvements. Alternatively, open GeForce Experience or NVIDIA App and check for driver updates from the NVIDIA source. Newer NVIDIA drivers include improved DLSS 3.5 Ray Reconstruction support and updated DLSS 4 Multi Frame Generation preview.

Step 2 – Enable DLSS in Each Game

Open the game and navigate to Settings – Graphics. Look for Anti-aliasing, Image Quality, or Upscaling section. Select DLSS from the dropdown (it may say NVIDIA DLSS or just DLSS). Then choose a quality preset: Quality for best visuals with good performance boost, Performance for maximum frames, or Balanced for a middle ground. Frame Generation will appear as a separate toggle below DLSS Super Resolution – enable it for additional frame rate increase.

Recommended DLSS Settings by Game Type

For single-player games at 1080p on the Legion Slim 5i Gen 9 display: use DLSS Quality to maintain sharpness. For competitive multiplayer at 1080p: use DLSS Performance for maximum frame rates and enable Frame Generation if base FPS is above 60. For 1440p external monitor gaming: DLSS Quality or Balanced provides substantial performance headroom for the RTX 4070 while keeping image quality high enough for 27-inch display sizes.

Enable NVIDIA Reflex for Lower Input Latency

In supported games, find NVIDIA Reflex Low Latency in the settings menu and enable it (or set to Enabled + Boost). Reflex reduces the latency between mouse movement or controller input and the rendered frame appearing on screen. This is particularly valuable on the Legion Slim 5i Gen 9 high refresh rate display where the frame pacing improvement from Reflex is visible as more responsive crosshair movement in first-person shooters.

Verify DLSS is Working

Open NVIDIA GeForce Experience, go to In-Game Overlay (Alt + Z), and enable the Performance HUD. The HUD shows current DLSS mode, render resolution versus output resolution, and Frame Generation status. If DLSS is working correctly, the render resolution will be lower than the output resolution (for example 960×540 rendering displayed at 1920×1080 in Performance mode). Frame Generation shows a multiplier when active.

Frequently Asked Questions

How do I enable DLSS on Lenovo Legion Slim 5i Gen 9 RTX 4070?

In-game graphics settings – find Anti-aliasing or Upscaling – select DLSS – choose quality preset. Update NVIDIA driver via Lenovo Vantage for latest DLSS model support.

What DLSS version does RTX 4070 on Lenovo Legion Slim 5i Gen 9 support?

DLSS 3 including Frame Generation, Super Resolution, Ray Reconstruction, and NVIDIA Reflex. DLSS 4 Multi Frame Generation in newer driver updates.

Does DLSS Frame Generation work on RTX 4070 laptop?

Yes – requires Ada Lovelace Optical Flow Accelerator, which RTX 4070 Laptop GPU has. Enable per game in DLSS settings when base FPS is above 60.

Does DLSS reduce image quality on Lenovo Legion Slim 5i Gen 9?

DLSS Quality is near-native. Balanced is slightly softer. Performance is noticeably softer but provides 50-70 percent more frames worth the trade-off for high refresh gaming.

Conclusion

Enabling DLSS on the Lenovo Legion Slim 5i Gen 9 RTX 4070 in Windows 11 is done per-game in the graphics settings menu. Updating the NVIDIA driver via Lenovo Vantage ensures the latest DLSS models and Frame Generation improvements are available. DLSS Quality mode provides near-native image quality with 40-60 percent more frames, while Frame Generation can nearly double perceived frame rates in supported titles for exceptional high refresh rate gaming on the Legion Slim 5i Gen 9 platform.