Pyyan / Compare / DGX Spark vs RTX 3090 (used)

DGX Spark vs RTX 3090 (used)

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Local AI Hardware · verified 13 Aug 2026

DGX SparkNVIDIAcurrent
RTX 3090 (used)NVIDIAcurrent
3 slots left
SpecificationDGX SparkRTX 3090 (used)
SummaryHard to recommend for most people.Best value entry point.
Memory128GB LPDDR5x24GB
Bandwidth273 GB/s
Price$4,699~$900
70B tok/s2.7
CategoryLocal AI HardwareLocal AI Hardware
OfficialNVIDIANVIDIA

Highlighted rows are where these differ.

DGX Spark

  • 273 GB/s — a Mac Studio does twice that for less
  • Only buy for full CUDA parity at 128GB

Best for CUDA + multi-node only.

Full spec sheet →

RTX 3090 (used)

  • Handles models up to 32B
  • Last consumer card with NVLink

Best for getting started.

Full spec sheet →