What you need to run LTX-2.3

About LTX-2.3

LTX-2.3 is a video generation model from Lightricks. Short clips with real camera motion. Detail is soft at low settings. Running it locally needs about 24 GB of memory.

Smallest Mac that runs it

The least memory you need, by Apple chip:

• M1: does not fit
• M1 Pro: from 32 GB
• M1 Max: from 32 GB
• M1 Ultra: from 64 GB
• M2: does not fit
• M2 Pro: from 32 GB
• M2 Max: from 32 GB
• M2 Ultra: from 64 GB
• M3: does not fit
• M3 Pro: from 36 GB
• M3 Max: from 36 GB
• M3 Ultra: from 96 GB
• M4: from 32 GB
• M4 Pro: from 48 GB
• M4 Max: from 36 GB
• M5: from 32 GB
• M5 Pro: from 48 GB
• M5 Max: from 36 GB

Graphics cards

Runs well on: RTX 5090. Runs slowly with help from system RAM on: RTX 3090, RTX 4090, Radeon RX 7900 XTX.

Hardware to run it

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• Smallest Mac: M5 with 32 GB. See it on Amazon
• Smallest graphics card: RTX 5090 (32 GB). See it on Amazon
• Storage: image, video and voice models are large, and most people end up keeping several. A fast external SSD keeps your main drive free. See SSDs on Amazon

Lighter and heavier alternatives

• Wan 2.2 5B: needs about 16 GB, a lighter choice. Text or image to video on a single consumer GPU.
• Wan 2.2 14B: needs about 32 GB, a heavier choice. Best open video quality, but heavy.

Questions