Best GPU for Qwen3 8B (2026)
The cheapest GPU that runs Qwen3 8B at 4-bit (Q4) is the Arc B580 (12 GB), currently about $330 (new, VideoCardPrices (Newegg), 2026-11-12). Qwen3 8B needs roughly 6.7 GB of VRAM at Q4 with an 8K-token context. Don't want to buy? Rent a GeForce RTX 3060 12GB that fits it from $0.056/hr (Vast.ai).
Prices updated Nov 12, 2026 · model on Hugging FaceCheapest card that fits, by quantization
| Quant | VRAM needed | Cheapest GPU that fits | Price | Est. speed* | Shop |
|---|---|---|---|---|---|
| Q4 | 6.7 GB | Arc B58012 GB | $330 newVideoCardPrices (Newegg) · 2026-11-12 | ~44 tok/s | Check pricenew · Amazonor used on eBay |
| Q8 | 10.2 GB | Arc B58012 GB | $330 newVideoCardPrices (Newegg) · 2026-11-12 | ~27 tok/s | Check pricenew · Amazonor used on eBay |
| FP16 | 17.4 GB | Radeon RX 7900 XT20 GB | $770 usedGPU Sold · 2026-11-10 | ~27 tok/s | Check priceused · eBayor new on Amazon |
*Rough estimate from memory bandwidth, single user. Context for text models: 8K tokens. Model specs: 8.2B parameters; 36 layers, 8 KV heads × 128 head dim (from Hugging Face metadata, fetched 2026-10-18).
Or rent a GPU for Qwen3 8B
| Quant | VRAM needed | Cheapest rentable GPU that fits | Price | Est. speed* | |
|---|---|---|---|---|---|
| Q4 | 6.7 GB | GeForce RTX 3060 12GB12 GB | $0.056/hrVast.ai · marketplace | ~34 tok/s | Rent |
| Q8 | 10.2 GB | GeForce RTX 3060 12GB12 GB | $0.056/hrVast.ai · marketplace | ~21 tok/s | Rent |
| FP16 | 17.4 GB | GeForce RTX 309024 GB | $0.14/hrVast.ai · marketplace | ~31 tok/s | Rent |
Cheapest on-demand hourly prices found 2026-11-12 05:55 ET. Marketplace prices move by the minute. Compare all rental prices and the buy-vs-rent break-even →
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FAQ
How much VRAM does Qwen3 8B need?
About 7 GB at Q4, 10 GB at Q8, 17 GB at FP16 (including a 8K-token KV cache and ~1 GB runtime overhead).
What is the best budget GPU for Qwen3 8B?
Arc B580 is the cheapest card in our tracker that fits it at Q4.
Can I rent a GPU to run Qwen3 8B instead?
Yes. The cheapest single rented GPU with enough VRAM for Q4 we found was a GeForce RTX 3060 12GB at $0.06/hour on Vast.ai (2026-11-12). Marketplace prices change constantly.
How fast will it run?
Token generation on a single GPU is limited mostly by memory bandwidth. Our tokens/sec figures are estimates (0.6 × bandwidth ÷ bytes read per token) and real results vary by backend and settings.
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