Qwen2.5 1.5B Quantized.w8a8 — Hardware Requirements & GPU Compatibility
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Qwen2.5 1.5B Quantized.w8a8 is a 1.8B-parameter open language model from RedHatAI in the Qwen 2.5 family. It supports a context window of up to 32,768 tokens. At Q4_K_M it needs about 1.43 GB of VRAM — see which GPUs and Macs can run it below.
1.3M downloads
4 likesSpecifications
- Publisher
- RedHatAI
- Family
- Qwen 2.5
- Parameters
- 1.8B
- Architecture
- Qwen2ForCausalLM
- Context Length
- 32,768 tokens
- Vocabulary Size
- 151,936
- Release Date
- 2024-12-03
- License
- Apache 2.0
Get Started
HuggingFace
How Much VRAM Does Qwen2.5 1.5B Quantized.w8a8 Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| Q2_K | 3.40 | 1.1 GB | 2 GB | 0.76 GB | 2-bit quantization with K-quant improvements |
| Q3_K_S | 3.50 | 1.1 GB | 2.0 GB | 0.78 GB | 3-bit small quantization |
| Q3_K_M | 3.90 | 1.2 GB | 2.1 GB | 0.87 GB | 3-bit medium quantization |
| Q4_0 | 4.00 | 1.3 GB | 2.1 GB | 0.89 GB | 4-bit legacy quantization |
| Q4_K_M | 4.80 | 1.4 GB | 2.3 GB | 1.07 GB | 4-bit medium quantization — most popular sweet spot |
| Q5_K_M | 5.70 | 1.6 GB | 2.5 GB | 1.27 GB | 5-bit medium quantization — good quality/size tradeoff |
| Q6_K | 6.60 | 1.8 GB | 2.7 GB | 1.47 GB | 6-bit quantization, very good quality |
| Q8_0 | 8.00 | 2.1 GB | 3.0 GB | 1.78 GB | 8-bit quantization, near-lossless |
Which GPUs Can Run Qwen2.5 1.5B Quantized.w8a8?
Q4_K_M · 1.4 GBQwen2.5 1.5B Quantized.w8a8 (Q4_K_M) requires 1.4 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 2+ GB is recommended. Using the full 33K context window can add up to 0.9 GB, bringing total usage to 2.3 GB. 35 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti.
Runs great
— Plenty of headroomWhich Devices Can Run Qwen2.5 1.5B Quantized.w8a8?
Q4_K_M · 1.4 GB33 devices with unified memory can run Qwen2.5 1.5B Quantized.w8a8, including NVIDIA DGX H100, NVIDIA DGX A100 640GB.
Runs great
— Plenty of headroomRelated Models
Frequently Asked Questions
- How much VRAM does Qwen2.5 1.5B Quantized.w8a8 need?
Qwen2.5 1.5B Quantized.w8a8 requires 1.4 GB of VRAM at Q4_K_M, or 2.1 GB at Q8_0. Full 33K context adds up to 0.9 GB (2.3 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 1.8B × 4.8 bits ÷ 8 = 1.1 GB
KV Cache + Overhead ≈ 0.3 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 1.2 GB (at full 33K context)
VRAM usage by quantization
Q4_K_M1.4 GBQ4_K_M + full context2.3 GB- What's the best quantization for Qwen2.5 1.5B Quantized.w8a8?
For Qwen2.5 1.5B Quantized.w8a8, Q4_K_M (1.4 GB) offers the best balance of quality and VRAM usage. Q5_0 (1.5 GB) provides better quality if you have the VRAM. The smallest option is IQ3_XS at 1.1 GB.
VRAM requirement by quantization
IQ3_XS1.1 GBQ3_K_M1.2 GBQ4_K_S1.4 GBQ4_K_M ★1.4 GBQ5_11.6 GBQ8_02.1 GB★ Recommended — best balance of quality and VRAM usage.
- Can I run Qwen2.5 1.5B Quantized.w8a8 on a Mac?
Qwen2.5 1.5B Quantized.w8a8 requires at least 1.1 GB at IQ3_XS, 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 Qwen2.5 1.5B Quantized.w8a8 locally?
Yes — Qwen2.5 1.5B Quantized.w8a8 can run locally on consumer hardware. At Q4_K_M quantization it needs 1.4 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Qwen2.5 1.5B Quantized.w8a8?
At Q4_K_M, Qwen2.5 1.5B Quantized.w8a8 can reach ~2039 tok/s on AMD Instinct MI300X. On NVIDIA GeForce RTX 4090: ~458 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 ÷ 1.4 × 0.55 = ~2039 tok/s
Estimated speed at Q4_K_M (1.4 GB)
~2039 tok/s~458 tok/s~1524 tok/s~1260 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Qwen2.5 1.5B Quantized.w8a8?
At Q4_K_M, the download is about 1.07 GB. The full-precision Q8_0 version is 1.78 GB. The smallest option (IQ3_XS) is 0.73 GB.
- Which GPUs can run Qwen2.5 1.5B Quantized.w8a8?
35 consumer GPUs can run Qwen2.5 1.5B Quantized.w8a8 at Q4_K_M (1.4 GB). Top options include AMD Radeon RX 6700 XT, AMD Radeon RX 6800, AMD Radeon RX 6800 XT. 35 GPUs have plenty of headroom for comfortable inference.
- Which devices can run Qwen2.5 1.5B Quantized.w8a8?
33 devices with unified memory can run Qwen2.5 1.5B Quantized.w8a8 at Q4_K_M (1.4 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.