Hopper
NVIDIA H100 SXM5 80GB
wins
4
The H100 SXM5 is the high-performance form factor of the H100.
Ada Lovelace
NVIDIA L40
wins
1
The NVIDIA L40 is the predecessor to the L40S, offering 48GB GDDR6 and Ada Lovelace architecture.
Performance comparison
Visual bars — winner highlighted
NVIDIA H100 SXM5 80GB
Metric
NVIDIA L40
FP16 TFLOPS
Bandwidth
VRAM
TDP (lower=better)
TFLOPS/watt
GB/s per watt
Full specification table
| Spec | NVIDIA H100 SXM5 80GB | NVIDIA L40 |
|---|---|---|
| Architecture | Hopper | Ada Lovelace |
| VRAM | 80 GB HBM3 | 48 GB GDDR6 |
| VRAM type | HBM3 | GDDR6 |
| Memory bandwidth | 3,350 GB/s | 864 GB/s |
| FP16 TFLOPS | 989 TFLOPS | 181 TFLOPS |
| TDP | 700 W | 300 W |
| TFLOPS/watt | 1.41 T/W | 0.60 T/W |
| GB/s per watt | 4.79 GB/s/W | 2.88 GB/s/W |
| NVLink | Yes | No |
| Release year | 2022 | 2022 |
Live cloud pricing
On-demand pricing across providers — updated in real time
NVIDIA H100 SXM5 80GB
No live pricing data available.
NVIDIA L40
Power efficiency analysis
TFLOPS/watt and GB/s/watt — critical for data center TCO
NVIDIA H100 SXM5 80GB
NVIDIA L40
TFLOPS/watt measures compute efficiency — how much AI throughput you get per watt of power consumed. For data centers with PUE of 1.2–1.5, a 10% improvement in TFLOPS/watt translates directly to lower electricity costs and cooling requirements. GB/s/watt measures memory bandwidth efficiency, which is the binding constraint for memory-bound LLM inference workloads.
Performance-per-dollar
TFLOPS/$ and GB/s/$ at current best cloud prices
NVIDIA H100 SXM5 80GB
NVIDIA L40
TFLOPS/$ = FP16 TFLOPS ÷ best on-demand $/hr. Higher is better — more compute per dollar. GB/s/$ = memory bandwidth ÷ best on-demand $/hr. For memory-bound inference workloads (most LLM serving), GB/s/$ is often a better predictor of cost-efficiency than TFLOPS/$. Prices are live from the Compute Comparison API and update in real time.
Workload Cost Comparison
Total job cost = best on-demand $/hr × GPU count × hours
| Workload | Scale | NVIDIA H100 SXM5 80GB | NVIDIA L40 |
|---|---|---|---|
| 7B LLM fine-tune | 8× GPU, 24 h | — | $180 |
| 70B LLM fine-tune | 64× GPU, 72 h | — | $4.3k |
| Inference server | 1× GPU, 730 h | — | $684 |
| Image gen batch | 4× GPU, 8 h | — | $30 |
Based on current best on-demand prices. Spot pricing typically 40–70% lower. Actual cost depends on provider, region, and availability.
When to choose each GPU
Choose NVIDIA H100 SXM5 80GB for:
- LLM training
- Multi-GPU NVLink clusters
- High-throughput inference
Weaknesses / Limitations
- Highest cost per H100 variant — premium over PCIe form factor
- SXM5 form factor requires NVLink-capable server chassis
- 700W TDP demands high-density power and cooling infrastructure
Choose NVIDIA L40 for:
- Professional inference
- Rendering
- Visualization AI
Weaknesses / Limitations
- Lower FP16 TFLOPS (181) than L40S (362) at the same VRAM and bandwidth
- Superseded by L40S — less available on new deployments
- GDDR6 bandwidth lower than HBM-based data center GPUs
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