NVIDIA GB300 NVL72 GPU 288GB vs NVIDIA B300 SXM 262GB
The GB300 delivers 11% more FP8 throughput than the B300 (5,000 vs 4,500 TFLOPS dense). The GB300 also carries 26 GB more memory (288 GB vs 263 GB).
NVIDIA GB300 NVL72 GPU 288GB
Full specs →NVIDIA B300 SXM 262GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
Both GPUs launched in 2025: the GB300 on Blackwell Ultra and the B300 on Blackwell Ultra.
Dense throughput for the GB300 against the B300: FP64 1.4 vs 1.3 TFLOPS, FP32 83 vs 75 TFLOPS, FP16 2,500 vs 2,250 TFLOPS, FP8 5,000 vs 4,500 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 288 GB against 263 GB, fed at 8.0 TB/s versus 8.0 TB/s. More memory per GPU means larger models fit before you have to shard across cards, which often matters more than raw TFLOPS for inference.
For LLM training and inference, weight the FP8 and FP16 rows and memory capacity most heavily. For scientific and HPC workloads, the FP64 row is the one to read.
Frequently asked questions
Is the GB300 faster than the B300?
At FP8 precision the GB300 reaches 5,000 TFLOPS dense against 4,500 TFLOPS for the B300. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the GB300 or the B300?
The GB300 carries 288 GB of VRAM versus 263 GB for the B300. Memory bandwidth is 8.0 TB/s for the GB300 and 8.0 TB/s for the B300.
Can I rent the GB300 or the B300 in the cloud?
Yes. Live cloud listings tracked by Flopper start at $3.75 per GPU hour. The rental pricing section on this page lists current providers and rates for both GPUs.
Where to Rent
NVIDIA B300 SXM 262GB
| Provider | Configuration | Price/GPU-hr | Checked | |
|---|---|---|---|---|
 DataCrunch | 1× B300 SXM Spot | $3.75 | 2h ago | View → |
 Nebius | 1× B300 SXM Spot | $4.30 | 2h ago | View → |
 CoreWeave | 8× B300 SXM Spot | $4.48 | 2h ago | View → |
 RunPod | 1× B300 SXM Community | $6.94 | 2h ago | View → |
 Hyperstack | 1× B300 SXM | $7.40 | 2h ago | View → |
| DataCrunch | 1× B300 SXM | $7.50 | 2h ago | View → |
| Nebius | 1× B300 SXM | $7.85 | 2h ago | View → |
| RunPod | 1× B300 SXM | $7.89 | 2h ago | View → |
 Scaleway | 8× B300 SXM | $8.69 | 2h ago | View → |
 DigitalOcean | 1× B300 SXM | $11.19 | 2h ago | View → |
| DigitalOcean | 8× B300 SXM | $11.19 | 2h ago | View → |
Get Comparison Updates
New GPUs added weekly. Be the first to see how they compare.