Export speed with Apple M3 Pro and Windows

[MarcoSlavazza]

Good morning, I wanted to know if it was my problem that on my Windows PC with Intel i7 13700k configuration and 32 GB of RAM and Samsung 980 Pro SSD, the image export times from Lightroom are almost twice as slow as on the MacBook Pro 14'' with Apple M3 Pro with 16GB of RAM.
How is it that a processor that on paper should be almost twice as fast is actually significantly slower? Do I have some wrong settings? Could it be a question of video card and monitor (on desktop I have two 27-inch Eizo 2k connected)?

[D Fosse]

By default this is done in the graphics processor (GPU) now. So that's probably the difference. You can disable this:

[MarcoSlavazza]

I tried activating it, deactivating it and doing the same thing with a GeForce 3050 but it always takes over 7 minutes compared to 4 for the M3.
Does anyone know how this is possible? Is there some setting wrong?

[D Fosse]

I've seen other people saying it can't be turned off, even when the box is unchecked. Haven't tested this myself.

So either way, it seems the GPU speed determines this.

[GoldingD]

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post.

[MarcoSlavazza]

Versione di Lightroom Classic: 13.0.1 [ 202310121438-d2af310c ]
Licenza: Creative Cloud
Impostazioni lingua: it
Sistema operativo: Windows 11 - Business Edition
Versione: 11.0.22621
Architettura dell'applicazione: x64
Architettura del sistema: x64
Conteggio processore logico: 24
Velocità processore: 3,4GHz
Versione SqLite: 3.36.0
Utilizzo CPU: 0,0%
Memoria integrata: 32520,8 MB
Memoria GPU dedicata usata da Lightroom: 2754,9MB / 4074,9MB (67%)
Memoria reale disponibile in Lightroom: 32520,8 MB
Memoria fisica usata Lightroom: 2507,9 MB (7,7%)
Memoria virtuale usata Lightroom: 5928,1 MB
Conteggio oggetti GDI: 822
Conteggio oggetti UTENTE: 3289
Conteggio maniglie elaborate: 2664
Dimensione cache memoria: 46,2MB
Versione Camera Raw interna: 16.0 [ 1677 ]
Numero di thread massimo utilizzato da Camera Raw: 5
Ottimizzazione SIMD Camera Raw: SSE2,AVX,AVX2
Memoria virtuale di Camera Raw: 930MB / 16260MB (5%)
Memoria reale di Camera Raw: 1298MB / 32520MB (3%)
Impostazione DPI del sistema: 96 DPI
Composizione desktop attivata: Sì
Lato maggiore Anteprime standard: 2560 pixel
Monitor: 1) 1920x1200, 2) 2560x1440
Tipi di input: Multitouch: No, Tocco integrato: No, Penna integrata: Sì, Tocco esterno: No, Penna esterna: No, Tastiera: No

Informazioni processore grafico:
DirectX: Radeon RX 580 Series (31.0.12044.3)
Stato iniziale: GPU per l'elaborazione immagini supportata per impostazione predefinita
Preferenze utente: Automatico

Cartella applicazione: C:\Program Files\Adobe\Adobe Lightroom Classic
Percorso libreria: D:\MATRIMONIO\catalogo\Matrimonio Michi+Oly\Matrimonio Michi+Oly.lrcat
Cartella impostazioni: C:\Users\mails\AppData\Roaming\Adobe\Lightroom

Plug-in installati:
1) AdobeStock
2) ColorChecker Camera Calibration
3) Epson Print Layout
4) Flickr
5) Monogram Plugin
6) Plug-in acquisizione diretta Nikon

[Conrad_C]

Could it be a question of video card and monitor (on desktop I have two 27-inch Eizo 2k connected)?

By @MarcoSlavazza

I do not think the Eizo displays are a factor. Although external displays do increase the demand on a GPU, two 27-inch 2K displays is a small burden these days; current GPUs like the RTX series are built to drive multiple 4K+ displays with no problem and with room left over for other graphics processing. And, your GPU seems to have a generous 16GB of graphics RAM, and two 2K displays will use only a small fraction of that. So it has to be something else.

I do agree that the CPU speed is probably not much of a factor with Lightroom Classic, and it is probably more of a GPU issue. And although I just saw some M3 Pro benchmarks that looked good for Lightroom Classic export, I am still surprised that a 16GB RTX 4060 is so much slower here, that does seem wrong.

[MarcoSlavazza]

If I can, I'll post my system data tomorrow. in any case, that screenshot isn't mine, I have a 4Gb ddr5 Sapphire Nitro RX580 and today I tried with a GeForce RTX 3050 8Gb ddr6 but nothing changed. However I also tried disconnecting the monitors and nothing changes... I don't understand

[D Fosse]

That screenshot above with the RTX 4060 is mine. That's my work machine and as it happens I also have 2 Eizos connected. to it.  Haven't noticed it being particularly slow, but then I don't know the numbers and sizes of the files Marco is exporting.

[MarcoSlavazza]

no but in fact I also didn't consider it slow, 1 second to preview at 100% on the Z9 and D850 files and about 7.30 minutes to export them. However, now that I have purchased the new M3 Pro, the difference is substantial: immediate enlargement and export of the same files in 4 minutes..

[D Fosse]

There has been an exceptional amount of various GPU problems lately, much more than we normally see, mostly affecting RTX 30- and 40- series. Now it appears (in another thread) that there may be some problem with the sniffer.exe in Photoshop v25. Not sure how that would affect things like Export, but you never know. Computers work in mysterious ways. We'll see how that plays out.

EDIT: sorry, late night and forgot I wasn't in the Photoshop forum. Not sure how relevant that was.