Chip comparison
NVIDIA GB300 (Blackwell Ultra) vs NVIDIA L40S
Side-by-side specs
Straight from each vendor's datasheet. Winner in bold: higher throughput, memory, or transistor count; lower power draw or price. Sparse (2:4) throughput roughly doubles the FP8/INT8 numbers shown.
| Field | NVIDIA GB300 (Blackwell Ultra) | NVIDIA L40S |
|---|---|---|
| Process node | TSMC 4NP | TSMC 4N |
| Transistors (B) | — | 76.3 |
| TDP | 1400 W | 350 W |
| Memory | 288 GB HBM3e | 48 GB GDDR6 |
| Memory bandwidth | 8,000 GB/s | 864 GB/s |
| FP16 (dense) | — | 362 TFLOPS |
| BF16 (dense) | — | 362 TFLOPS |
| FP8 (dense) | 5,000 TFLOPS | 733 TFLOPS |
| INT8 (dense) | — | 733 TOPS |
| Form factor | Superchip (Blackwell Ultra + Grace) | PCIe |
| Announced | 2025-03-18 | 2023-08-08 |
| Released | 2025-11-01 | — |
Robots running NVIDIA GB300 (Blackwell Ultra)
No robots publicly running it yet.
Robots running NVIDIA L40S
No robots publicly running it yet.
Data centers with NVIDIA GB300 (Blackwell Ultra)
Data centers with NVIDIA L40S
No data centers publicly running it yet.
Common questions
NVIDIA GB300 (Blackwell Ultra) vs NVIDIA L40S: which is faster for training?
NVIDIA GB300 (Blackwell Ultra) has 6.82x the dense FP8 throughput of the other (NVIDIA GB300 (Blackwell Ultra): 5,000 TFLOPS; NVIDIA L40S: 733 TFLOPS). Real-world training speed also depends on memory bandwidth, interconnect, and software stack: see the spec diff for those inputs.
NVIDIA GB300 (Blackwell Ultra) vs NVIDIA L40S: which has more memory?
NVIDIA GB300 (Blackwell Ultra) carries more HBM (NVIDIA GB300 (Blackwell Ultra): 288 GB HBM3e; NVIDIA L40S: 48 GB GDDR6). Memory capacity sets the largest model that fits on one chip without partitioning; memory bandwidth sets inference throughput.
NVIDIA GB300 (Blackwell Ultra) vs NVIDIA L40S: which is more power-efficient?
Dense FP8 TFLOPS per watt: NVIDIA GB300 (Blackwell Ultra) 3.57 (5,000 ÷ 1400 W); NVIDIA L40S 2.09 (733 ÷ 350 W). NVIDIA GB300 (Blackwell Ultra) wins at the die level; system-level efficiency also depends on cooling and interconnect.
NVIDIA GB300 (Blackwell Ultra) vs NVIDIA L40S: which is more widely used?
NVIDIA GB300 (Blackwell Ultra): 0 robots and 1 data center publicly running it. NVIDIA L40S: 0 robots and 0 data centers. Empty here means no operator has said publicly, not zero adoption in the market.
See also: every chip comparison · NVIDIA GB300 (Blackwell Ultra) full page · NVIDIA L40S full page.