NVIDIA RTX 4000 SFF Ada 20GB vs NVIDIA L40S 48GB
The L40S delivers 4.8x the FP8 throughput of the RTX 4000 SFF Ada (733 vs 153 TFLOPS dense). The L40S also carries 28 GB more memory (48 GB vs 20 GB).
NVIDIA RTX 4000 SFF Ada 20GB
Full specs →NVIDIA L40S 48GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
Both GPUs launched in 2023: the RTX 4000 SFF Ada on Ada Lovelace and the L40S on Ada Lovelace.
Dense throughput for the RTX 4000 SFF Ada against the L40S: FP64 0.3 vs 1.4 TFLOPS, FP32 19 vs 92 TFLOPS, FP8 153 vs 733 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 20 GB against 48 GB, fed at 280 GB/s versus 864 GB/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.
Power budgets are 70 W for the RTX 4000 SFF Ada and 350 W for the L40S. At FP32 that works out to 0.27 against 0.26 TFLOPS per watt.
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 RTX 4000 SFF Ada faster than the L40S?
At FP8 precision the L40S reaches 733 TFLOPS dense against 153 TFLOPS for the RTX 4000 SFF Ada. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the RTX 4000 SFF Ada or the L40S?
The L40S carries 48 GB of VRAM versus 20 GB for the RTX 4000 SFF Ada. Memory bandwidth is 280 GB/s for the RTX 4000 SFF Ada and 864 GB/s for the L40S.
How much power do the RTX 4000 SFF Ada and the L40S draw?
The RTX 4000 SFF Ada is rated at 70 W TDP and the L40S at 350 W. On FP32 throughput per watt, the RTX 4000 SFF Ada is the more efficient part.
Can I rent the RTX 4000 SFF Ada or the L40S in the cloud?
Yes. Live cloud listings tracked by Flopper start at $0.18 per GPU hour. The rental pricing section on this page lists current providers and rates for both GPUs.
Where to Rent
NVIDIA L40S 48GB
| Provider | Configuration | Price/GPU-hr | Checked | |
|---|---|---|---|---|
 Vast.ai | 1× L40S 48GB Community | $0.60 | 1h ago | View → |
 DataCrunch | 1× L40S 48GB Spot | $0.69 | 1h ago | View → |
 Nebius | 1× L40S 48GB Spot | $0.74 | 1h ago | View → |
 RunPod | 1× L40S 48GB Community | $0.79 | 1h ago | View → |
 Cudo Compute | 1× L40S 48GB | $0.87 | 1h ago | View → |
 Massed Compute | 1× L40S 48GB | $0.88 | 1h ago | View → |
 CoreWeave | 8× L40S 48GB Spot | $0.98 | 1h ago | View → |
| RunPod | 1× L40S 48GB | $1.09 | 1h ago | View → |
| DataCrunch | 1× L40S 48GB | $1.37 | 1h ago | View → |
 AceCloud | 1× L40S 48GB | $1.50 | 1h ago | View → |
 Crusoe | 1× L40S 48GB | $1.50 | 1h ago | View → |
| Nebius | 1× L40S 48GB | $1.55 | 1h ago | View → |
 DigitalOcean | 1× L40S 48GB | $1.57 | 1h ago | View → |
 Vultr | 1× L40S 48GB | $1.67 | 1h ago | View → |
 OVHcloud | 4× L40S 48GB | $1.80 | 1h ago | View → |
| CoreWeave | 8× L40S 48GB | $2.25 | 1h ago | View → |
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