Which GPU to rent for fine-tuning large models (LoRA / QLoRA)?

Q: Which GPU to rent for fine-tuning large models (LoRA / QLoRA)?

GPU selection depends on ‘fine-tuning method × model size’: 7B QLoRA requires ~10–12GB (RTX 4090 24GB suffices; current lowest price ¥1.15/hour); 7B LoRA starts at ~24GB; 13B LoRA needs ~48GB; full-parameter fine-tuning for a 7B model requires ≥160GB (minimum: 2×A100 80GB). Conclusion: For 90% of individual and lab fine-tuning needs, one pay-as-you-go RTX 4090 + QLoRA is sufficient; reserve multi-GPU A100/H100 setups for full-parameter or large-model fine-tuning.

Last updated: 2026-11-12 15:45 · Always refer to the platform’s official order page · Free API: rentgpu.link/api/prices

Quick Answer: Select GPUs based on “fine-tuning method × model size”: 7B QLoRA needs ~10–12GB (RTX 4090 24GB suffices; current lowest ¥1.15/hour); 7B LoRA starts at ~24GB; 13B LoRA requires ≥48GB; full-parameter fine-tuning for 7B demands ≥160GB (minimum: 2×A100 80GB). Conclusion: 90% of individual and lab fine-tuning needs can be met with one pay-as-you-go RTX 4090 + QLoRA; full-parameter or large-model fine-tuning requires multi-GPU A100/H100 setups.

Commonly used GPUs for fine-tuning	Current lowest monitored	Per day	Platform
RTX 4090	¥1.15/hour	¥28/day	Salad (USA)
A100 80GB	¥5.47/hour	¥131/day	Paperspace (United States)
H100 80GB	¥8.28/hour	¥199/day	Paperspace (United States)
H200 141GB	¥16.49/hour	¥396/day	Jarvislabs (India)

VRAM rough estimate (bf16 baseline)

QLoRA ≈ parameter count × 0.6–0.8 GB + small optimizer overhead; LoRA ≈ parameter count × 2 GB + activations; full-parameter fine-tuning ≈ parameter count × 16–20 GB. So 7B full-parameter ≈ 120–160 GB, 13B full-parameter ≈ 240–300 GB. Actual usage depends on your framework—enabling gradient checkpointing and flash-attention saves 20%–40%.

Cost-Saving Tips

Fine-tuning supports checkpoint resumption; spot/preemptible instances can save 30%–60%; validate on a small scale first, then scale up; offload data preprocessing to CPU machines — don’t burn GPU rental time.

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rentgpu.link (GPU Compute Radar) “Which GPU should I rent for fine-tuning large language models (LoRA / QLoRA)?”, updated 2026-11-12, https://rentgpu.link/answers/gpu-for-finetuning (CC BY 4.0)

Which GPU to rent for fine-tuning large models (LoRA / QLoRA)?

VRAM rough estimate (bf16 baseline)

Cost-Saving Tips

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