GPU HEAD-TO-HEAD

NVIDIA RTX 4080 Laptop vs NVIDIA RTX 4090 Laptop

Which graphics card is better for running local language models? Here is how the NVIDIA RTX 4080 Laptop (12 GB) compares against the NVIDIA RTX 4090 Laptop (16 GB) in real memory headroom, supported model architectures, and generation speed.

NVIDIA · Mobile 12 GB VRAM

NVIDIA RTX 4080 Laptop

  • Memory Bandwidth: 384 GB/s (GDDR6)
  • Fits fully in VRAM: 34 popular models
  • Power Draw (TDP): 150W
  • Largest recommended (Q4): 14B
View all NVIDIA RTX 4080 Laptop models →
NVIDIA · Mobile 16 GB VRAM

NVIDIA RTX 4090 Laptop

  • Memory Bandwidth: 512 GB/s (GDDR6)
  • Fits fully in VRAM: 35 popular models
  • Power Draw (TDP): 150W
  • Largest recommended (Q4): 20B–22B
View all NVIDIA RTX 4090 Laptop models →

The AI Local Check Verdict: Which GPU should you buy for AI?

The NVIDIA RTX 4090 Laptop is the clear winner for local AI. It delivers 4 GB more VRAM and superior memory bandwidth (512 GB/s vs 384 GB/s).

It unlocks larger parameter classes without system RAM offloading and generates tokens noticeably faster.

Models that fit on NVIDIA RTX 4090 Laptop, but NOT on NVIDIA RTX 4080 Laptop

These models run entirely in GPU VRAM on the NVIDIA RTX 4090 Laptop, but require slow system RAM offload on the NVIDIA RTX 4080 Laptop:

Model Size Downloads NVIDIA RTX 4090 Laptop NVIDIA RTX 4080 Laptop
MaziyarPanahi/Qwen3-32B-GGUF 32.76B 169,921 Fits in VRAM Offload (Slow)

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