4k Issue with Lightroom Classic

[Simon28131455dita]

Hi,

I have a client experiencing lag while scrolling. The system specs are as follows:

• Processor: AMD Ryzen 9 7950X3D 4.2GHz, 128MB L3 Cache (Model: 100-100000908WOF)
• Graphics Card: Gigabyte GeForce RTX 4070 Ti Super 16GB AERO OC (Model: GV-N407TSAERO OC-16GD G10) - 2 of these installed
• Motherboard: Gigabyte X670 Gaming X AX V2 Socket AM5 ATX (Model: X670 GAMING X AX V2 G10)
  Memory: G.Skill Trident Z RGB 64GB (32x2) F5-6000J3040G32GX2-TZ5RK DDR5
•  

We've run extensive hardware checks and stress tests on all components, and nothing appears faulty. We even replaced the motherboard, but the issue persists.

Has anyone encountered a similar problem or have any suggestions on what to try next?

Thanks in advance!

[dj_paige]

Lag while scrolling where? Library Module? Develop Module? Somewhere else?

Does the resource monitor indicate any particular part of the computer is highly utilized when this happens? 

What version NUMBER of Lightroom Classic? What operatign system version NUMBER?

[Simon28131455dita]

the lag is in the library and develop section t is also when im doing masks like gradient filters and radial filters, cropping is also laggy. Some sliders sometimes lag and even presets.

Windows 11 Pro 
Build: 226312861
Version: 11.0.26631

Lightroom: 14.0.1

[GoldingD]

Any sync, especially sync to cloud running in that catalog?

[Simon28131455dita]

No It's not in sync

[Simon28131455dita]

A quick update:

When we used a different GPU (the 1660), the problem was resolved. We then tested the 4070, and Lightroom initially performed well; we couldn't replicate the issue at first.

We formatted the computer again, installed the latest drivers, fully updated Windows, reinstalled Lightroom—and the problem reappeared. We tried installing GeForce Experience and optimized settings, but the issue persisted. It seems that when we installed the 1660, something was automatically disabled, which resolved the problem. The only possible cause that comes to mind is Ray Tracing, but we couldn’t find an option to disable it for Lightroom, nor an option in DirectX settings.