Lumimaid Magnum 12B — Hardware Requirements & GPU Compatibility
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Lumimaid Magnum 12B is a 12.2B-parameter open language model from Undi95. It supports a context window of up to 1,024,000 tokens. At Q4_K_M it needs about 8.07 GB of VRAM — see which GPUs and Macs can run it below.
Runs great on a 24 GB GPU
Runs from 8 GB (IQ2_M · 16K)Best on 24 GB (Q4_K_M · ~81 tok/s · 64K)Macs from 16 GB (Q4_K_M · ~17 tok/s)
Reference GPU · RTX 4090 24 GB
Estimates, ±20% · how we estimate
Run Lumimaid Magnum 12B
One recommended way. Every other method, OS and quant is in the step-by-step guide.Each way opens a step-by-step guide for your OS and quant.
Recommended
ollama run hf.co/bartowski/Lumimaid-Magnum-12B-GGUF:Q4_K_MQ4_K_M fits fully on the RTX 4090 · 13.0 GB free · 16K context
Download: Lumimaid-Magnum-12B-Q4_K_M.gguf7.48 GBbartowski
Ways to runOther ways
each opens step-by-stepRun in cloud
Your own private copy · Q4_K_M · 24 GB GPU
- The easiest way to try this model
- Running in a few minutes, easy setup
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Runs on RTX 3090 (24 GB) (13 GB headroom) · Q4_K_M
- Generation speed
- ~75 tok/s
- generation speed
- Cost per 1M output tokens
- $0.62
- per 1M output tokens
How Much VRAM Does Lumimaid Magnum 12B Need?
Select a quantization level; the listed hardware adheres to it.
| Quantization | VRAM | +32K | On RTX 4090 (reference) | |
|---|---|---|---|---|
| 5.9 GB | 12.2 GB | 2-bit · K-quant — 2-bit quantization with K-quant improvements | Fits: 64K context · ~111 tok/s | |
| 6.1 GB | 12.4 GB | 3-bit small — 3-bit small quantization | Fits: 64K context · ~108 tok/s | |
| 6.7 GB | 13 GB | 3-bit medium — 3-bit medium quantization | Fits: 64K context · ~98 tok/s | |
| 6.8 GB | 13.1 GB | 4-bit · legacy — 4-bit legacy quantization | Fits: 64K context · ~96 tok/s | |
| 8.1 GB | 14.4 GB | 4-bit medium — 4-bit medium quantization — most popular sweet spot | Fits: 64K context · ~81 tok/s | |
| 9.4 GB | 15.7 GB | 5-bit medium — 5-bit medium quantization — good quality/size tradeoff | Fits: 64K context · ~69 tok/s | |
| 10.8 GB | 17.1 GB | 6-bit, very good — 6-bit quantization, very good quality | Fits: 64K context · ~61 tok/s | |
| 13.0 GB | 19.3 GB | 8-bit, near-lossless — 8-bit quantization, near-lossless | Fits: 32K context · ~51 tok/s |
Selected Q4_K_M
4-bit medium quantization11.0GBat 16K context
- Weights
- 7.4 GB
- KV cache
- 3.4 GB
- Overhead
- 0.3 GB
Fits RTX 4090 (reference) · 13.0 GB free · ~81 tok/s
≥50 tok/s needs ≥620 GB/s · RTX 5090 ~144, RTX 3090 Ti ~81
Which Hardware Can Run Lumimaid Magnum 12B?
Q4_K_M · 8.1 GBLumimaid Magnum 12B (Q4_K_M) requires 8.1 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 11+ GB is recommended. Using the full 1024K context window can add up to 209.3 GB, bringing total usage to 217.4 GB. 40 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti, NVIDIA GeForce RTX 3080 Ti. 150 devices with unified memory can run Lumimaid Magnum 12B, including Mac Studio (M3 Ultra, 256GB), Mac Studio (M3 Ultra, 512GB).
12 GB
12 GB tier →fits · 1.0 GB free · up to 16K ctx
10 GPUs
RTX 3080 Ti~74Simulate output on RTX 3080 TiRTX 5070~54Simulate output on RTX 5070RTX 4070~41Simulate output on RTX 407020 GB
fits · 9.0 GB free · up to 32K ctx
1 GPU
RX 7900 XT~60Simulate output on RX 7900 XT32–40 GB
fits · 21.0 GB free · up to 64K ctx
1 GPU · 3 Mac classes · 4 device families
RTX 5090~144Simulate output on RTX 5090M5 Max36 GB~40Simulate output on Mac Studio M5 Max (36 GB)M532 GB~13Simulate output on MacBook Air 13" M5 (32 GB)Orin~17Simulate output on NVIDIA Jetson AGX Orin 32GBSnapdragon X Elite (X1E-80-100)~11Simulate output on Snapdragon X Elite Copilot+ PC
By VRAM tier · typical GPUs and Macs at Q4_K_M
Similar models
6| Model | Score | VRAM | tok/s | Why it is similar |
|---|---|---|---|---|
| Gemma 3 12B ITGoogle | 74.2 | 10.9 GB | ~82 | same size |
| Gemma 4 12BGoogle | — | 9 GB | ~80 | same size |
| Mistral Nemo Base 2407Mistral AI | — | 11 GB | ~81 | same size |
| Baichuan2 13B Basebaichuan-inc | — | 11.5 GB | ~76 | same size |
| Llama 2 13B Chat HFMeta | — | 11.5 GB | ~76 | same size |
| Vicuna 13B V1.3LMSYS | — | 8.6 GB | ~76 | same size |
Specifications
- Publisher
- Undi95
- Parameters
- 12.2B
- Architecture
- MistralForCausalLM
- Context Length
- 1,024,000 tokens
- Vocabulary Size
- 131,072
- Release Date
- 2024-07-30
Frequently Asked Questions
How much VRAM does Lumimaid Magnum 12B need?
Lumimaid Magnum 12B requires 8.1 GB of VRAM at Q4_K_M, or 25.2 GB at BF16. Full 1024K context adds up to 209.3 GB (217.4 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 12.2B × 4.8 bits ÷ 8 = 7.3 GB
KV Cache + Overhead ≈ 0.8 GB (at 2K context + ~0.3 GB framework)
Fit ratings and hardware model lists check this model with room for a 16K-token context, which needs a little more memory.
KV Cache + Overhead ≈ 210.1 GB (at full 1024K context)
VRAM usage by quantization
Can NVIDIA GeForce RTX 4090 run Lumimaid Magnum 12B?
Yes, at Q8_0 (13.0 GB) or lower. Higher quantizations like BF16 (25.2 GB) exceed the NVIDIA GeForce RTX 4090's 24 GB.
What's the best quantization for Lumimaid Magnum 12B?
For Lumimaid Magnum 12B, Q4_K_M (8.1 GB) offers the best balance of quality and VRAM usage. Q4_K_L (8.2 GB) provides better quality if you have the VRAM. The smallest option is IQ2_M at 4.8 GB.
VRAM requirement by quantization
★ Recommended — best balance of quality and VRAM usage.
Can I run Lumimaid Magnum 12B on a Mac?
Yes — Mac Mini M2 Pro (16 GB) and 133 other Macs can run Lumimaid Magnum 12B. Apple Silicon uses unified memory, so the model shares RAM with the system. At Q4_K_M you need at least 8.1 GB of usable unified memory (RAM minus macOS overhead).
Can I run Lumimaid Magnum 12B locally?
Yes — Lumimaid Magnum 12B can run locally on consumer hardware. Popular tools include Ollama, LM Studio, and llama.cpp.
How fast is Lumimaid Magnum 12B?
At Q4_K_M, Lumimaid Magnum 12B can reach ~595 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~81 tok/s. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.
tok/s = (bandwidth GB/s ÷ model GB) × efficiency
Example: NVIDIA B200 → 8000 ÷ 8.07 × 0.65 = ~644 tok/s
Estimated speed at Q4_K_M (8.1 GB)
Real-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
What's the download size of Lumimaid Magnum 12B?
At Q4_K_M, the download is about 7.35 GB. The full-precision BF16 version is 24.50 GB. The smallest option (IQ2_M) is 4.13 GB.
Which GPUs can run Lumimaid Magnum 12B?
40 consumer GPUs can run Lumimaid Magnum 12B at Q4_K_M. Top options include AMD Radeon RX 6800, AMD Radeon RX 6800 XT, AMD Radeon RX 6900 XT, AMD Radeon RX 6700 XT. 26 GPUs have plenty of headroom for comfortable inference.
Which devices can run Lumimaid Magnum 12B?
150 devices with unified memory can run Lumimaid Magnum 12B at Q4_K_M (8.1 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Beelink GTR9 Pro (Ryzen AI Max+ 395, 128 GB), Framework Desktop (Ryzen AI Max+ 395, 128 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.