GPU acceleration not working in latest Release

Report · Oct 14, 2025

Hi, in the latest version 14.5.1 the GPU shoud accelerate previews and exports. However, my Nvidia 5070 TI with 16 GB Ram is ideling with 1-15% during previews and export although it is enabled in the lightroom settings. CPU (i9-9900KF) is running at 80%.

How can I enable lightroom to use the brand new GPU?

Report · Oct 14, 2025

What are your settings in Edit>Preferences>Performance? Have you updated the Nvidia "studio" drivers directly from Nvidia?

Report · Oct 14, 2025

Also the automatic settings do ot change the performance.

It is the official Nvidia driver.

Report · Oct 14, 2025

Check if you have buldin a CPU with an internal graphic processor. If yes, disable the processor internal graphic card. The internal GPU can sometimes caused several issues. Open the Windows Device Manager, right-click the card's name and choose Disable.

My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 24H2 -- LR-Classic 14 - Photoshop 26 - Nik Collection 8 - PureRAW 5 - Topaz PhotoAI 4

Report · Oct 14, 2025

The KF Version does not have a graphic chip.

Report · Oct 14, 2025

Hi Emilia,

Sorry about this experience and thanks for trying the steps suggested above and sharing your observations! Could you please share your System Info from Lightroom? You can find it by going to Help > System Info, then copy and paste the details here. This will help us check whether Lightroom is correctly detecting your GPU.

In the meantime, please try the troubleshooting steps mentioned in this link: Troubleshoot GPU issues in Lightroom Classic. These steps usually help resolve GPU acceleration or detection issues.

Regards,

Srishti

Report · Oct 14, 2025

Thanks Srishti,

I checked the troubleshoput tips w/o success. This is the utilization whene exporting raw files as jpgs:

CPU goes upt to 90%.

Here are the system infos:

Lightroom Classic-Version: 14.5.1 [ 202508231203-c2638d01 ]

Lizenz: Creative Cloud

Spracheinstellung: de

Betriebssystem: Windows 11 - Business Edition

Version: 11.0.26200

Anwendungsarchitektur: x64

Systemarchitektur: x64

Anzahl logischer Prozessoren: 16

Prozessorgeschwindigkeit: 3,6GHz

SQLite-Version: 3.36.0

CPU-Auslastung: 1,0%

Stromquelle: Angeschlossen

Integrierter Speicher: 65439,2 MB

Dedizierter GPU-Speicher, der von Lightroom verwendet wird: 74,0MB / 15907,0MB (0%)

Für Lightroom verfügbarer phys. Speicher: 65439,2 MB

Von Lightroom verwendeter phys. Speicher: 6875,1 MB (10,5%)

Von Lightroom verwendeter virtueller Speicher: 8035,2 MB

Anzahl GDI-Objekte: 1273

Anzahl BENUTZER-Objekte: 3213

Anzahl Prozess-Handles: 3665

Cache-Speichergröße: 3867,9MB

Interne Camera Raw-Version: 17.5 [ 2318 ]

Maximale Anzahl Threads, die Camera Raw verwendet: 5

Camera Raw SIMD-Optimierung: SSE2,AVX,AVX2

Virtueller Speicher in Camera Raw: 604MB / 32719MB (1%)

Physischer Speicher in Camera Raw: 606MB / 65439MB (0%)

Cache1:

NT- RAM:0,0MB, VRAM:0,0MB, Combined:0,0MB

Cache2:

m:3867,9MB, n:0,0MB

U-main: 133,0MB

DPI-Einstellung des Systems: 120 DPI

Desktop-Komposition aktiviert: Ja

Standardvorschaugröße: 3840 Pixel

Monitore/Anzeigegeräte: 1) 3840x2160

Eingabetypen: Multitouch: Nein, integrierte Toucheingabe: Nein, integrierter Stift: Nein, externe Toucheingabe: Nein, externer Stift: Nein, Tastatur: Nein

Informationen zum Grafikprozessor:

DirectX: NVIDIA GeForce RTX 5070 Ti (32.0.15.8129)

Anfangsstatus: GPU zum Exportieren wird standardmäßig unterstützt

Benutzerpräferenz: Automatisch

HDR in Bibliothek aktivieren: EIN

GPU zur Vorschauerstellung: Ein (S5_15)

Anwendungsordner: C:\Program Files\Adobe\Adobe Lightroom Classic

Bibliothekspfad: C:\Daten\Lightroom\Lightroom_G_Catalog-6-2-2-v13-3.lrcat

Einstellungen-Ordner: C:\Users\ctrop\AppData\Roaming\Adobe\Lightroom

Installierte Zusatzmodule:

1) AI Keywording

2) Apply LUT

3) Export LUT

4) Find Duplicates 2

5) jf Bag-o-Goodies

6) jf Data Explorer

7) jf Export Quality Tester

8) jf Extended Search

9) jf Folder Publisher

10) jf Metadata Viewer

11) jf Proximity Search

12) Show Focus Points

Config.lua-Flags:

Adapter Nr. 1: Anbieter : 10de

Gerät : 2c05

Subsystem : 89f61043

Version : a1

Grafikspeicher : 15907

Adapter Nr. 2: Anbieter : 1414

Gerät : 8c

Subsystem : 0

Version : 0

Grafikspeicher : 0

AudioDeviceIOBlockSize: 1024

AudioDeviceName: System Default - Lautsprecher (XONAR SOUND CARD)

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 48000

Build: LR5x26

Direct2DEnabled: false

GL_ACCUM_ALPHA_BITS: 16

GL_ACCUM_BLUE_BITS: 16

GL_ACCUM_GREEN_BITS: 16

GL_ACCUM_RED_BITS: 16

GL_ALPHA_BITS: 0

GL_BLUE_BITS: 8

GL_DEPTH_BITS: 24

GL_GREEN_BITS: 8

GL_MAX_3D_TEXTURE_SIZE: 16384

GL_MAX_TEXTURE_SIZE: 32768

GL_MAX_TEXTURE_UNITS: 4

GL_MAX_VIEWPORT_DIMS: 32768,32768

GL_RED_BITS: 8

GL_RENDERER: NVIDIA GeForce RTX 5070 Ti/PCIe/SSE2

GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA

GL_STENCIL_BITS: 8

GL_VENDOR: NVIDIA Corporation

GL_VERSION: 4.6.0 NVIDIA 581.29

GPUDeviceEnabled: false

OGLEnabled: true

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Report · Oct 14, 2025

There are many parts of building previews that can't be effectively executed on the GPU -- reading the original photo from disk, parsing it, interpreting the develop settings and preparing them for execution on the GPU, writing the results to disk, updating the database indexing the previews. Similarly for exporting.

What's more important than relative GPU/CPU utilization is whether you get a significant speedup when the option Preferences > Performance > Use GPU For Preview Generation is enabled. I just tested on my Macbook Pro 2023, and building standard-sized previews for 250 raws from diverse cameras goes 1.76 times faster with the GPU enabled (16.4 photos/sec versus 9.3 photos/sec). (The raws were stored on an internal SSD.)

Exporting those raws goes 3.3 times faster (0.86 sec/photo versus 3.8 sec/photo).

What numbers do you observe?

Report · Oct 14, 2025

Previes are generated 2 times faster with GPU than w/o. But giving the fact, that the CPU is not the newest, this is not great. Raws are stored on a raid array with a server high performance raid controller.

Report · Oct 14, 2025

"Previews are generated 2 times faster with GPU than w/o. But giving the fact, that the CPU is not the newest, this is not great."

I haven't seen any reports of previews getting sped up much more than 2x using the GPU. How many previews per second with the GPU enabled?

Remember that the GPU and CPU work in tandem and that the CPU prepares all the work for the GPU. The limiting factors could include the CPU speed, the practical (not theoretical) memory bandwidth between CPU and GPU, and the speed of reading and writing to images to disk. If the images are stored on a spinning disks, and the raws are say 40 MB each, then LR won't be able to read more than about 5 per second (unless you have RAID 5 striping across 3 or more disks).

Report · Oct 15, 2025

Generating previews of a R5 (raw) is only about 0,5 photos per second with the GPU enabled with the latest driver that came out yesterday... Previews are generated on an RAID0 with two M.2 SSDs.

I was expecting that the GPU is used similar to Premiere Pro, where ist is very often nearly 100% utilized.

Report · Oct 15, 2025

@Emilia34645157h2zw: "Generating previews of a R5 (raw) is only about 0,5 photos per second with the GPU enabled"

That does seem slow. Given that the GPU speeds it up by 2x (which is what others observe) suggests the limiting factor isn't the GPU but elsewhere.

1. Do you have Preferences > Performance > Generate Previews In Parallel enabled? If not, enable it and redo the timing.

"Previews are generated on an RAID0 with two M.2 SSDs.:"

R5 and R5 M2 raws average about 50 - 55 MB each, so LR in theory should be able to read the raws much faster from that volume than 2 secs/photo.

2. Is this a network-attached or direct- attached volume?

3. Rule out issues with that volume by doing a quick experiment: Copy 100 raws to the local C drive and add them in place to a new temporary catalog. How long does LIbrary > Previews > Build Standard-Sized Previews take after discarding all the previews?

"I was expecting that the GPU is used similar to Premiere Pro, where ist is very often nearly 100% utilized."

LR presents a much different workload than Premier Pro. LR is applying a very complicated export rendering pipeline to individual photos, each with its own develop settings, while PP is doing relatively simple, repetitive video operations on a stream of frames, on GPUs that have video-optimized functionality.

Also, note that the issue of displaying GPU utilization in the Task Manager is fairly complicated, and Task Manager's graphs may not always a very good picture of what's going on:

https://devblogs.microsoft.com/directx/gpus-in-the-task-manager/