How fast will Llama 3.1 8B feel on the NVIDIA RTX Spark N1X 128GB (laptop)?

Llama 3.1 8B on the NVIDIA RTX Spark N1X 128GB (laptop)

Llama 3.1 8B is a 8.03B-parameter model. At Q4_K_M it needs about 5.7 GB of memory. The NVIDIA RTX Spark N1X 128GB (laptop) has 119 GB usable, so it fits entirely in memory. Expect about 27 tokens/sec (13–40), with the first token after 0.3 s for a short prompt. This estimate is interpolated from benchmarks of similar setups.

Speed by quantization

Quantization	File size	Memory	Generation	First token	Source
Q4_K_M	4.9 GB	Fits	27 tok/s	0.3 s	Derived
Q8_0	8.5 GB	Fits	15 tok/s	0.3 s	Derived
FP16	16.1 GB	Fits	8.1 tok/s	0.3 s	Derived

Llama 3.1 8B on other hardware

H200 141GB (cloud) · 425 tok/s at Q4_K_M
Mac Studio M5 Ultra 256GB · 130 tok/s at Q4_K_M
H100 80GB (cloud) · 123 tok/s at Q4_K_M
Mac Studio M5 Ultra 512GB · 117 tok/s at Q4_K_M
NVIDIA RTX 4090 24GB · 108 tok/s at Q4_K_M
AMD RX 7900 XT 20GB · 105 tok/s at Q4_K_M
NVIDIA RTX 3090 24GB · 98 tok/s at Q4_K_M
NVIDIA Tesla V100 32GB · 90 tok/s at Q4_K_M
AMD Radeon AI PRO R9700 32GB · 84 tok/s at Q4_K_M
AMD RX 9070 XT 16GB · 84 tok/s at Q4_K_M
NVIDIA RTX PRO 6000 96GB · 76 tok/s at Q4_K_M
AMD Instinct MI50 32GB · 72 tok/s at Q4_K_M
NVIDIA RTX 5090 32GB · 68 tok/s at Q4_K_M
MacBook Pro M5 Max 128GB · 67 tok/s at Q4_K_M
Mac Studio M3 Ultra 512GB · 63 tok/s at Q4_K_M
NVIDIA RTX 5060 Ti 16GB · 56 tok/s at Q4_K_M
Mac Studio M4 Max 128GB · 53 tok/s at Q4_K_M
NVIDIA RTX 5070 Ti 16GB · 50 tok/s at Q4_K_M
Mac mini M5 Pro 64GB · 45 tok/s at Q4_K_M
AMD RX 7900 XTX 24GB · 43 tok/s at Q4_K_M
AMD Ryzen AI Max+ PRO 495 192GB (Gorgon Halo) · 36 tok/s at Q4_K_M
NVIDIA RTX 5080 16GB · 36 tok/s at Q4_K_M
NVIDIA DGX Spark 128GB · 35 tok/s at Q4_K_M
AMD Ryzen AI Max+ 395 128GB (Strix Halo) · 33 tok/s at Q4_K_M
MacBook Pro M5 Pro 48GB · 33 tok/s at Q4_K_M
MacBook M4 Pro 24GB · 33 tok/s at Q4_K_M
NVIDIA RTX 3060 12GB · 32 tok/s at Q4_K_M
Intel Arc Pro B70 32GB · 26 tok/s at Q4_K_M
CPU-only (Ryzen 9 9950X, 96GB DDR5) · 10 tok/s at Q4_K_M

Other models on the NVIDIA RTX Spark N1X 128GB (laptop)

Qwen 3.6/3.8 27B · 7.8 tok/s at Q4_K_M
Qwen 3.8 Flash-Next · 35 tok/s at UD-Q4_K_XL
GLM-5.3 Flash · 21 tok/s at UD-Q2_K_XL
Gemma 4 26B A4B · 52 tok/s at Q4_K_M
GPT-OSS 20B · 60 tok/s at MXFP4
Qwen 3.5/3.6 35B A3B · 91 tok/s at Q4_K_M
Gemma 4 31B · 7.1 tok/s at Q4_K_M
Qwen 3.5 9B · 23 tok/s at Q4_K_M
DeepSeek V4 Flash · 26 tok/s at UD-IQ3_S
DeepSeek V4.1 Flash · 12 tok/s at Q2_K
GPT-OSS 120B · 67 tok/s at MXFP4
Gemma 4 12B · 18 tok/s at Q4_K_M
GLM-5.3 · 6.6 tok/s at UD-IQ1_S
Nemotron 3.5 Lightning 30B A3B · 54 tok/s at Q4_K_M

All models on the NVIDIA RTX Spark N1X 128GB (laptop) · Llama 3.1 8B on all hardware

Estimates for a short prompt on a single device. Measured numbers come from community benchmarks (r/LocalLLaMA, localscore.ai and more); others are derived from similar setups or projected from specs. Open source on GitHub.