Flux.1 Dev VRAM & Cloud GPU Cost Calculator (24GB vs 16GB)
Calculate exact VRAM requirements for Flux.1 Dev (FP16, FP8, GGUF Q4) with LoRA & ControlNet. Compare RunPod vs Vast.ai cloud costs for 24GB vs 16GB GPUs.
Hardware Benchmark & Architecture Analysis
Flux.1 Dev (12B parameters) is notoriously VRAM-intensive. In FP16, weights alone occupy 24GB, triggering CUDA Out-Of-Memory (OOM) errors on consumer 16GB cards. Quantizing to FP8 lowers base weights to ~13.5GB, allowing generation on 16GB/24GB GPUs like the RTX 4070 Ti Super or RTX 4090. If stacking 2 LoRAs and 1 ControlNet, total allocation peaks at ~16.5GB, making a 24GB GPU the optimal sweet spot for zero-swap generation.
ComfyUI Pipeline Parameters
FP8 preserves 98%+ fidelity while cutting weight VRAM by nearly 45%.
24GB VRAM Tier
Target: RTX 3090 / RTX 4090
Deploying ComfyUI or Custom AI Agents in Production?
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Book Free AI Pipeline AuditCloud GPU Compatibility & Pricing Matrix
Live rates for 60 hours/month running Flux.1 Dev (12B) (FP8)
| GPU Model & Architecture | VRAM | Compatibility | RunPod Rate | Vast.ai Rate | AWS EC2 Rate | Est. Monthly (60h) | Cost / 100 Gens |
|---|---|---|---|---|---|---|---|
NVIDIA RTX 3060Ampere | 12 GB | OOM Risk (-5.8 GB) | $0.19/hr | $0.12/hr | N/A (Consumer) | $11.40Vast: $7.20 | $—~40.0s / gen |
NVIDIA RTX 4070 Ti SuperAda Lovelace | 16 GB | OOM Risk (-1.8 GB) | $0.29/hr | $0.20/hr | N/A (Consumer) | $17.40Vast: $12.00 | $—~20.6s / gen |
NVIDIA RTX 3090Ampere | 24 GB | Fits (+6.2 GB) | $0.34/hr | $0.22/hr | N/A (Consumer) | $20.40Vast: $13.20 | $0.203~21.5s / gen |
NVIDIA RTX 4090Ada Lovelace | 24 GB | Fits (+6.2 GB) | $0.69/hr | $0.44/hr | N/A (Consumer) | $41.40Vast: $26.40 | $0.268~14.0s / gen |
NVIDIA RTX 5090Blackwell | 32 GB | Fits (+14.2 GB) | $1.19/hr | $0.85/hr | N/A (Consumer) | $71.40Vast: $51.00 | $0.321~9.7s / gen |
NVIDIA RTX A6000Ampere Workstation | 48 GB | Fits (+30.2 GB) | $0.79/hr | $0.55/hr | $1.85/hr | $47.40Vast: $33.00 | $0.384~17.5s / gen |
NVIDIA L40SAda Lovelace Datacenter | 48 GB | Fits (+30.2 GB) | $1.09/hr | $0.82/hr | $2.24/hr | $65.40Vast: $49.20 | $0.369~12.2s / gen |
NVIDIA A100 SXMAmpere Datacenter | 80 GB | Fits (+62.2 GB) | $1.89/hr | $1.39/hr | $4.10/hr | $113.40Vast: $83.40 | $0.546~10.4s / gen |
NVIDIA H100 SXMHopper Datacenter | 80 GB | Fits (+62.2 GB) | $2.99/hr | $2.25/hr | $6.80/hr | $179.40Vast: $135.00 | $0.482~5.8s / gen |
Hardware & Workflow Specific Presets
Jump straight into pre-calculated VRAM and cloud cost configurations:
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