Qwen3-14B on NVIDIA RTX 4080 Super (16GB VRAM)
Full FP16 (32.4 GB) exceeds 16 GB VRAM, but 4-bit GGUF Q4_K_M / AWQ requires 11.15 GB (9.24 GB weights + 1.25 GB KV cache at 8K context), delivering ~50.9 tokens/sec.
🎛️ Interactive VRAM & KV-Cache Tuner
📊 Real-Time Memory Footprint
11.15 GB / 16 GB🚀 Ready-to-Run Launch Command
ollama run qwen3:14b # Or with llama.cpp server (8K context, Flash Attention): llama-server -hf Qwen/Qwen3-14B-GGUF -c 8192 -ngl 99 -fa
Need 11.15 GB+ VRAM to run Qwen3-14B?
Recommended cloud setup for 4-bit: RTX 4090 (24GB) (or 32.4 GB for full FP16). Spin up a pre-configured vLLM / Ollama instance in 60 seconds:
| Provider | Best For | RTX 4090 (24GB) | A100 (80GB) | H100 (80GB) | Bonus / Trial | Action |
|---|---|---|---|---|---|---|
| RunPod | 1-Click vLLM / Ollama Pods | $0.44 / hr | $1.39 / hr | $2.39 / hr | Instant PyTorch / vLLM Pods + Serverless GPU | Deploy on RunPod → |
| Vast.ai | Cheapest Spot GPU Market | $0.29 / hr | $0.95 / hr | $1.79 / hr | Save 50–70% on RTX 4090 / 5090 / A100 rentals | Check Spot GPUs → |
| Vultr Cloud GPU | Enterprise SLA & Bare Metal | — | $1.79 / hr | $2.69 / hr | $300 Free Credit for New Users | Claim $300 Credit → |
| DigitalOcean GPU Droplets | Managed H100 Droplets | — | — | $2.99 / hr | $200 Free Trial (60 Days) | Get $200 Free → |
All Quantization Formats: Qwen3-14B on NVIDIA RTX 4080 Super
| Quantization Format | Bits/Weight | Weights VRAM | KV Cache (8K) | Total VRAM | Fits on 1x NVIDIA RTX 4080 Super (16GB)? | Est. Speed | GPUs Needed |
|---|---|---|---|---|---|---|---|
| FP16 / BF16 (Unquantized) | 16 bpw | 30.49 GB | 1.25 GB | 32.4 GB | No (Over by 16.4GB) | ~2 tok/s | 3x NVIDIA RTX 4080 Super |
| FP8 (W8A8 / E4M3) | 8.5 bpw | 16.2 GB | 1.25 GB | 18.11 GB | No (Over by 2.1GB) | ~3.7 tok/s | 2x NVIDIA RTX 4080 Super |
| GGUF Q8_0 (8-bit) | 8.5 bpw | 16.2 GB | 1.25 GB | 18.11 GB | No (Over by 2.1GB) | ~3.7 tok/s | 2x NVIDIA RTX 4080 Super |
| GGUF Q6_K (6-bit) | 6.56 bpw | 12.5 GB | 1.25 GB | 14.41 GB | Tight (90%) | ~37.6 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q5_K_M (5-bit) | 5.69 bpw | 10.84 GB | 1.25 GB | 12.75 GB | Yes (80%) | ~43.3 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q4_K_M / AWQ (4-bit) | 4.85 bpw | 9.24 GB | 1.25 GB | 11.15 GB | Yes (70%) | ~50.9 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF IQ4_XS (4.25 bpw) | 4.25 bpw | 8.1 GB | 1.25 GB | 10.01 GB | Yes (63%) | ~58 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q3_K_M (3-bit) | 3.91 bpw | 7.45 GB | 1.25 GB | 9.36 GB | Yes (59%) | ~63.1 tok/s | 1x NVIDIA RTX 4080 Super |
Frequently Asked Questions (Qwen3-14B + NVIDIA RTX 4080 Super)
Can NVIDIA RTX 4080 Super (16GB) run Qwen3-14B locally?
Yes — NVIDIA RTX 4080 Super (16GB) can run Qwen3-14B using GGUF Q6_K (6-bit). Full FP16 (32.4 GB) exceeds 16 GB VRAM, but 4-bit GGUF Q4_K_M / AWQ requires 11.15 GB (9.24 GB weights + 1.25 GB KV cache at 8K context), delivering ~50.9 tokens/sec.
How is KV Cache calculated for Qwen3-14B?
Qwen3-14B uses Dense-GQA with 40 transformer layers, 40 attention heads, and 8 KV heads (head dimension 128). At 8,192 tokens in FP16, KV cache consumes 1.25 GB. Enabling 8-bit KV cache (-ctk q8_0 -ctv q8_0 in llama.cpp or --kv-cache-dtype fp8 in vLLM) cuts this in half to 0.63 GB.