Qwen1.5 7B — Hardware Requirements & GPU Compatibility
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Qwen1.5 7B is a 7.7B-parameter open language model from Alibaba in the Qwen family. It supports a context window of up to 32,768 tokens. At Q4_K_M it needs about 6.01 GB of VRAM — see which GPUs and Macs can run it below.
156.0K downloads
56 likesSpecifications
- Publisher
- Alibaba
- Family
- Qwen
- Parameters
- 7.7B
- Architecture
- Qwen2ForCausalLM
- Context Length
- 32,768 tokens
- Vocabulary Size
- 151,936
- License
- Other
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HuggingFace
How Much VRAM Does Qwen1.5 7B Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| Q2_K | 3.40 | 4.7 GB | 20.8 GB | 3.28 GB | 2-bit quantization with K-quant improvements |
| Q3_K_S | 3.50 | 4.8 GB | 20.9 GB | 3.38 GB | 3-bit small quantization |
| Q3_K_M | 3.90 | 5.1 GB | 21.2 GB | 3.76 GB | 3-bit medium quantization |
| Q4_0 | 4.00 | 5.2 GB | 21.3 GB | 3.86 GB | 4-bit legacy quantization |
| Q4_K_M | 4.80 | 6.0 GB | 22.1 GB | 4.63 GB | 4-bit medium quantization — most popular sweet spot |
| Q5_K_M | 5.70 | 6.9 GB | 23.0 GB | 5.50 GB | 5-bit medium quantization — good quality/size tradeoff |
| Q6_K | 6.60 | 7.7 GB | 23.9 GB | 6.37 GB | 6-bit quantization, very good quality |
| Q8_0 | 8.00 | 9.1 GB | 25.2 GB | 7.72 GB | 8-bit quantization, near-lossless |
Which GPUs Can Run Qwen1.5 7B?
Q4_K_M · 6.0 GBQwen1.5 7B (Q4_K_M) requires 6.0 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 8+ GB is recommended. Using the full 33K context window can add up to 16.1 GB, bringing total usage to 22.1 GB. 35 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti, NVIDIA GeForce RTX 3070 Ti.
Runs great
— Plenty of headroom
Which Devices Can Run Qwen1.5 7B?
Q4_K_M · 6.0 GB33 devices with unified memory can run Qwen1.5 7B, including NVIDIA DGX H100, NVIDIA DGX A100 640GB, MacBook Air 13" M3 (8 GB).
Runs great
— Plenty of headroomDecent
— Enough memory, may be tightBenchmarks
View all 1 →Related Models
Derivatives (1)
Frequently Asked Questions
- How much VRAM does Qwen1.5 7B need?
Qwen1.5 7B requires 6.0 GB of VRAM at Q4_K_M, or 9.1 GB at Q8_0. Full 33K context adds up to 16.1 GB (22.1 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 7.7B × 4.8 bits ÷ 8 = 4.6 GB
KV Cache + Overhead ≈ 1.4 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 17.5 GB (at full 33K context)
VRAM usage by quantization
Q4_K_M6.0 GBQ4_K_M + full context22.1 GB- What's the best quantization for Qwen1.5 7B?
For Qwen1.5 7B, Q4_K_M (6.0 GB) offers the best balance of quality and VRAM usage. Q5_K_S (6.7 GB) provides better quality if you have the VRAM. The smallest option is Q2_K at 4.7 GB.
VRAM requirement by quantization
Q2_K4.7 GBQ4_05.2 GBQ4_K_S5.7 GBQ4_K_M ★6.0 GBQ5_K_S6.7 GBQ8_09.1 GB★ Recommended — best balance of quality and VRAM usage.
- Can I run Qwen1.5 7B on a Mac?
Qwen1.5 7B requires at least 4.7 GB at Q2_K, which exceeds the unified memory of most consumer Macs. You would need a Mac Studio or Mac Pro with a high-memory configuration.
- Can I run Qwen1.5 7B locally?
Yes — Qwen1.5 7B can run locally on consumer hardware. At Q4_K_M quantization it needs 6.0 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Qwen1.5 7B?
At Q4_K_M, Qwen1.5 7B can reach ~485 tok/s on AMD Instinct MI300X. On NVIDIA GeForce RTX 4090: ~109 tok/s. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.
tok/s = (bandwidth GB/s ÷ model GB) × efficiency
Example: AMD Instinct MI300X → 5300 ÷ 6.0 × 0.55 = ~485 tok/s
Estimated speed at Q4_K_M (6.0 GB)
~485 tok/s~109 tok/s~363 tok/s~300 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Qwen1.5 7B?
At Q4_K_M, the download is about 4.63 GB. The full-precision Q8_0 version is 7.72 GB. The smallest option (Q2_K) is 3.28 GB.
- Which GPUs can run Qwen1.5 7B?
35 consumer GPUs can run Qwen1.5 7B at Q4_K_M (6.0 GB). Top options include AMD Radeon RX 6700 XT, AMD Radeon RX 6800, AMD Radeon RX 6800 XT, AMD Radeon RX 7600. 28 GPUs have plenty of headroom for comfortable inference.
- Which devices can run Qwen1.5 7B?
33 devices with unified memory can run Qwen1.5 7B at Q4_K_M (6.0 GB), including Mac Mini M4 (16 GB), Mac Mini M4 (32 GB), Mac Mini M4 Pro (24 GB), Mac Mini M4 Pro (48 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.