Nvidia B300 (Blackwell Ultra)
The Nvidia B300 (Blackwell Ultra) is the second Blackwell GPU, with 288 GB of HBM3E.
- Vendor
- Nvidia
- Architecture
- Blackwell Ultra
- Memory
- 288 GB HBM3E
- Memory bandwidth (TB/s)
- 8 TB/s
- FP8 (TFLOPS)
- 5,000 TFLOPS
- FP4 (PFLOPS)
- 15 PFLOPS
- Power (W)
- 1,400 W
- Form factor
- SXM module (HGX B300 / DGX B300)
- Status
- Shipping
Blackwell Ultra has 288 GB of HBM3E at 8 TB/s, 15 PFLOPS of dense NVFP4 (1.5x Blackwell) and doubled attention-layer throughput, at up to 1,400 W. It ships in HGX B300 and DGX B300 eight-GPU systems, which Nvidia says are shipping now, and in GB300 NVL72 racks. DGX B300 totals 2.1 TB of GPU memory and 72 PFLOPS FP8 (sparse).
- Memory (GB)
- 288 GB
- Precision note (sparse or dense)
- Dense figures from Nvidia's chip table: FP8 5 PFLOPS dense / 10 sparse; NVFP4 15 PFLOPS dense / 20 sparse. HGX B300 board: FP4 144 sparse / 108 dense PFLOPS, FP8 72 PFLOPS sparse.
- Vendor source
- developer.nvidia.com
- Checked
Questions
How much memory does the Nvidia B300 have?
The B300 has 288 GB of HBM3E with 8 TB/s of memory bandwidth.
What is the difference between the B300 and B200?
Blackwell Ultra delivers 15 PFLOPS of dense NVFP4, 1.5x Blackwell, with doubled attention-layer throughput and 288 GB of HBM3E.
What is the B300’s FP8 and FP4 performance?
Nvidia lists FP8 at 5 PFLOPS dense and 10 sparse, and NVFP4 at 15 PFLOPS dense and 20 sparse.
How much power does the B300 use?
Nvidia lists the B300 at up to 1,400 W.
Source
Every figure is taken from the vendor’s own datasheet, product page, technical documentation or announcement, linked on each chip with the date it was last checked. How we pick and check sources: editorial standards.