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ProductNVIDIA GeForce RTX 4090NVIDIA RTX A4000NVIDIA DGX Spark
TypeStandalone componentStandalone componentComplete system
PriceList $1,599List $1,000List $3,999
ManufacturerNVIDIANVIDIANVIDIA
Offers6 marketplaces6 marketplaces6 marketplaces
Spec 1Memory: 24 GB GDDR6XMemory: 16 GB GDDR6 ECCSuperchip: GB10 Grace Blackwell
Spec 2Interface: PCIe 4.0 x16Interface: PCIe 4.0 x16Memory: 128 GB unified LPDDR5x
Spec 3TBP: 450 WPower: 140 WStorage: Up to 4 TB NVMe
Power450 W, 16-pin connector; 850 W PSU recommended140 W, 1× 6-pinApprox. 240 W external PSU
HostPCIe x16 slot; discontinued, mostly used/refurbished stockPCIe x16 slotStandalone desktop; ConnectX-7 for pairing two units
WarrantyVaries; often seller warranty on used units3 years (via partner)Per NVIDIA/OEM partner