ASRock NUC BOX-255H (Core Ultra 7 255H)
ASRock · Intel Arrow Lake-H · Released 2025Verified 2026-07-21
96 GB
DDR5 6400 SODIMM
13
NPU TOPS
102.4
GB/s Bandwidth
65 W
TDP
96 GBMemory (DDR5 6400 SODIMM)
102.4 GB/sMemory Bandwidth
13NPU TOPS
8GPU Compute Units
16CPU Cores
65 WTDP
$699
MSRP · Verified 2026-07-21
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AI Workload Fit
Local LLM Inference
Good — 70B class models
✓ Capable
Image Generation
SDXL, Flux
✓ Capable
NPU/AI Acceleration
Basic NPU — 13 TOPS
⚠ Basic
Power Efficiency
Excellent — 65W TDP
✓ Efficient
Model Fit Analysis
Usable AI memory: 46 GB (OS reserve: 4GB, GPU allocation: 50%) Conservative
Maximum model size at Q4: 70B class models (85B params, ~170GB at FP16)
Method: intel_igpu_bios_limited. Estimates account for OS reserve, GPU memory allocation fraction, and memory architecture. Actual results vary by workload, BIOS settings, and model architecture.
Llama 3.1 8B
~5.52GB Q4
✓ Fits
Llama 3.1 70B
~37.14GB Q4
✓ Fits
Llama 3.2 1B
~2GB Q4
✓ Fits
Llama 3.2 3B
~3.01GB Q4
✓ Fits
Qwen 2.5 7B
~5.01GB Q4
✓ Fits
Qwen 2.5 14B
~8.53GB Q4
✓ Fits
Qwen 2.5 32B
~18.06GB Q4
✓ Fits
Qwen 2.5 72B
~38.14GB Q4
✓ Fits
Mistral 7B
~5.01GB Q4
✓ Fits
Mixtral 8x7B
~25.44GB Q4
✓ Fits
DeepSeek R1 7B
~5.01GB Q4
✓ Fits
DeepSeek R1 32B
~18.06GB Q4
✓ Fits
DeepSeek R1 70B
~37.14GB Q4
✓ Fits
Phi-3 Medium 14B
~8.53GB Q4
✓ Fits
Gemma 2 9B
~6.02GB Q4
✓ Fits
Gemma 2 27B
~15.05GB Q4
✓ Fits
Stable Diffusion XL
~4.81GB Q4
✓ Fits
Flux.1 Dev
~7.52GB Q4
✓ Fits
Flux.1 Schnell
~7.52GB Q4
✓ Fits
Full Specifications
| Specification | Value |
|---|---|
| Memory Gb | 96 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Memory Type | DDR5 6400 SODIMM Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Memory Bus Width | 128-bit Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Memory Bandwidth Gbps | 102.4 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Npu Tops | 13 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Gpu Compute Units | 8 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Gpu Name | Intel Arc Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Cpu Cores | 16 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Tdp Watts | 65 Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Platform | Intel Arrow Lake-H Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Storage Type | NVMe Gen4 SSD Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Ai Framework | OpenVINO, DirectML Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Memory Upgradeable | Yes (DDR5 SODIMM) Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Oculink Pcie | No Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Ethernet | 2.5GbE Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
| Os Support | Windows 11, Linux Source: ASRock NUC BOX-255H Product Page · Verified 2026-07-21 |
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Specifications sourced from manufacturer datasheets. MSRP verified 2026-07-21. Model-fit uses conservative estimates accounting for OS reserve and GPU allocation — actual performance varies. Methodology