GB10

Blackwell 2.0 NVIDIA B-Series Desktop LPDDR5X 2025 NVIDIA

Key Metrics

Launch Date: 2025-10-15
CUDA Cores: 6,144
Memory: 128 GB LPDDR5X
Memory Bandwidth: 273.2 GB/s
TDP/TBP: 140 W
Interface: PCIe 5.0 x16

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GPU Specs

Identity
Entry Type	Reference GPU
Official Name	NVIDIA GB10
GPU Codename	GB20B
Architecture	Blackwell 2.0
Launch Date	2025-10-15
Market Segment Notes	Desktop in NVIDIA B-Series
Core Specs
GPU Die	GB20B
Process Node	TSMC 5 nm
CUDA Cores	6144
SM Count	48
TMUs	384
ROPs	48
AI Units / Tensor Cores	384
RT Units / RT Cores	48
Base Clock	1,665 MHz
Boost Clock	2,418 MHz
Pixel Fillrate	116.1 GP/s
Texture Fillrate	928.5 GT/s
FP32 Throughput	29.71 TFLOPS
FP16 Throughput	29.71 TFLOPS
FP64 Throughput	0.46 TFLOPS
Memory
Memory Size	128 GB
Memory Type	LPDDR5X
Memory Bus Width	256-bit
Memory Clock	1,067 MHz
Memory Bandwidth	273.2 GB/s
L2 Cache	50 MB
L1 Cache	250 KB
Board and Display
TDP / TBP	140 W
Recommended PSU	300 W
Power Connectors	None
Interface	PCIe 5.0 x16
Display Outputs	1x HDMI
Slot Width	IGP, 150 mm length, 150 mm width
Card Length	150 mm
Board Partner Model	Reference or OEM specification
Reference Design	NVIDIA reference design
Software
CUDA Compute Capability	12.1
OpenCL Support	OpenCL 3.0

Reviews1 review

Nvidia DGX Spark review: the GB10 Superchip powers a fast and fun AI toolbox that beats out AMD’s Ryzen AI Max+ 395 | Tom's Hardware

The article covers this model, but its exact card configuration is not established. Hands-on review of the DGX Spark system built around the GB10 superchip.

Sources

Independent reference sources

TechPowerUp GPU SpecsModel-level specification reference for this GPU entryOpen source

Reference databases

RightNow GPU DatabaseOpen GPU database used to cross-check specifications A reference database: good for cross-checking specifications, but not proof of the original release details on its own.Open source

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Nvidia DGX Spark review: the GB10 Superchip powers a fast and fun AI toolbox that beats out AMD’s Ryzen AI Max+ 395 | Tom's Hardware

Independent reference sources

Reference databases