DGX Spark x3 vs RTX 3090

GPU AGPU B

Best sourced output tok/s per model (single-stream generation) — engine and version, quantization, context and a source link on every row. Hover a value for the quant.

DGX Spark x31 sourced run · best 46.0 tok/s

RTX 309018 verified runs · best 709.5 tok/s

Model	DGX Spark x3	RTX 3090
LFM2.5-1.2B-Instruct	—	709.5 Q4_K_M
Qwen3.5-0.8B-MTP	—	476.1 Q6_K_XL
NVIDIA-Nemotron-3.5-Lightning-30B-A3B	—	353.7 NVFP4
LFM2.5-2.6B	—	305.6 Q4_K_M
Qwen3.5-4B-MTP	—	240.4 Q6_K_XL
Qwen3.8-27B	—	164.6 EXL3-3.5bpw
Qwen3.5-9B-MTP	—	164.3 Q6_K_XL
DeepSeek-V4.1-Flash	46.0 EXL3 3.5bpw	26.0 EXL3 3.0 bpw
Qwen3.8-Flash-Next	—	38.6 EXL3 2.50bpw
Ornstein3.6-27B-MTP-NSC-ACE-SABER	—	32.9 Q4_K_M
GLM-5.3-Flash	—	28.1 EXL3 3.05 bpw

Head-to-head (models tested on both): DGX Spark x3 1 · RTX 3090 0 · tied 0 · data as of Oct 6, 2026. Full rules: methodology.

Related reading: RTX 5090 vs 3090 · quantization · Value index · Full board