Can NVIDIA GeForce RTX 4090 run CogVideoX-5B?

5B parameter Video Gen model on 24GB GDDR6X

Yes — runs at full precision
~0.3-0.5 clips/min
SpeedFastest possible inference
QualityMaximum quality, no degradation

VRAM Requirements

CogVideoX-5B is a 5B parameter model. At full precision (FP16), it requires 18GB of VRAM. Your NVIDIA GeForce RTX 4090 has 24GB — enough to run it without any quantization.

FP16 (Full Precision)18GB (6GB free)

Maximum quality, no quantization

Q8 (8-bit)10GB (14GB free)

Near-lossless, ~50% size reduction

Q4 (4-bit)7GB (17GB free)

Good quality, ~75% size reduction

Your GPU VRAM: 24GB GDDR6X at 1008 GB/s bandwidth
Recommended system RAM: 48GB DDR5 (2x GPU VRAM minimum for model overflow)

What This Means in Practice

NVIDIA GeForce RTX 4090 can run CogVideoX-5B at full precision for video generation. You can generate short video clips from text prompts or images at maximum quality. Video generation is very compute-intensive — expect each clip to take 30 seconds to several minutes depending on resolution and length.

NVIDIA GeForce RTX 4090 Specs

VRAM24GB GDDR6X
Memory Bandwidth1008 GB/s
TDP450W
CUDA Cores16,384
Street Price~$1400
AI Rating9/10

About CogVideoX-5B

Tsinghua's open video generation model. Generates 6-second clips at 720p. More accessible VRAM requirements than larger video models. Good starting point for video gen experiments.

Category: Video Gen · Parameters: 5B · CUDA required: Recommended