DLSS 4 Multi Frame Generation 3x/4x on RTX 4000 – Software Lock, Not Hardware

I've been investigating whether DLSS 4 Multi Frame Generation 3x/4x is genuinely a hardware limitation on RTX 4000 series
— or simply a software-enforced restriction. The data points strongly in one direction.

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Benchmark Results — RTX 4070 Ti

Cyberpunk 2077 – Ray Tracing: Overdrive, 4K


3DMark NVIDIA DLSS Feature Test


Official 3DMark results (verified, public):
https://www.3dmark.com/compare/nd/580395/nd/580396/nd/580397

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The Black Overlay Problem

MFG 3x/4x can be enabled on RTX 4000 via NVIDIA Profile Inspector, bypassing the lock in NVIDIA App.
When enabled, something unexpected happens: a full-screen black overlay is rendered on top of the output.

But here's the key — everything underneath is working correctly:

• NVIDIA App reports the expected FPS scaling
• The game remains fully interactive
• Frame pacing is consistent
• Audio continues normally
• 3DMark records every single generated frame
  — including frame-time graphs that are identical in shape to FG 2x, just scaled proportionally

NVIDIA didn't throw an error.
They didn't disable the feature.
They added a curtain.

Click to expand...

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Ghidra Analysis – nvlddmkm.sys

I performed static analysis of nvlddmkm.sys (driver 32.0.15.9579) using Ghidra. Key finding:

• Identified string reference: ShowEvalModeOverlay
• Associated code path appears tied to runtime hardware/feature validation
• A single instruction change at offset 0x14C8A58: JNZ → JMP (0x75 → 0xEB) appears to influence whether the overlay is triggered

This is not yet definitive proof of the exact mechanism, but observed behavior is fully consistent with this hypothesis.

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The Blocker – Kernel Mode Code Integrity

Since nvlddmkm.sys is a kernel-mode driver, any modification hits Windows 11 KMCI enforcement:

• Test signing mode is insufficient
• Self-signed certificates don't work
• Secure Boot + modern Windows 11 = Code 52 signing error

This remains the current blocker for end-to-end validation of the patch.

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Full write-up, screenshots, Ghidra analysis and .3dmark-result files (openable locally in 3DMark to verify frame-time graphs yourself):

NVIDIA GeForce RTX 4000 Series - DLSS 4 Frame Generation 3x/4x Unlock​

Looking forward to discussion — especially from anyone who's done similar driver analysis or has access to other RTX 4000 GPUs for cross-validation.

I’ve now completed an Nsight Systems analysis of the Cyberpunk 2077 built-in benchmark using three captures taken under matching conditions:

• FG 2x
• FG 3x
• FG 4x

The captures were analyzed in NVIDIA Nsight Systems 2026.2.1.

Preliminary result: the data does not look like simple FPS counter inflation or trivial frame replay.
The present pattern scales in structured groups consistent with the selected mode (2 / 3 / 4),
which suggests that additional frames are actually being presented at the pipeline level.

This still does not automatically prove full image-quality equivalence with native RTX 5000-series MFG,
but it is much stronger evidence than benchmark FPS numbers alone. I’m attaching a few screenshots here,
and a full write-up will be published soon in my GitHub repository together with the supporting materials.

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Present events in a stable benchmark segment



Inter-present interval distribution in the 20-40 s analysis window



Output present rate vs inferred base render cadence



Packet size distribution inferred from >12 ms inter-packet gaps



GitHub update:

• a full technical summary
• figures from the Nsight analysis
• and the original capture files used for the investigation

https://github.com/FirstEverTech/RTX4000-MFG-Unlock/releases/tag/v1.0-nsight-notes