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NVIDIA L40S 48GB vs NVIDIA RTX 4000 SFF Ada 20GB

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).

L40S: Ada Lovelace, 2023 RTX 4000 SFF Ada: Ada Lovelace, 2023
FP8 dense lead
4.8x
L40S: 733 vs 153 TFLOPS
Memory
48 vs 20 GB
28 GB more for the L40S
Bandwidth
864 GB/s vs 280 GB/s
L40S moves data faster
TDP
350 W vs 70 W
RTX 4000 SFF Ada draws 280 W less
See rental pricing from $0.18/hr Download comparison sheet

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NVIDIA L40S 48GB vs NVIDIA RTX 4000 SFF Ada 20GB

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NVIDIA L40S 48GB

Leads on FP8 Full specs →

What is the NVIDIA L40S?

The L40S is a GPU from NVIDIA on the Ada Lovelace architecture, an accelerator for AI training, inference and high-performance computing. It is a PCIe add-in card, so it fits standard servers and workstations. L40S full specifications →

Can I rent the L40S in the cloud?

Yes. Cloud providers tracked by Flopper rent the L40S by the hour, and the pricing page compares their current rates and the price history side by side. L40S rental prices →

How does the L40S compare with other accelerators?

This page sets the L40S against the RTX 4000 SFF Ada. Both parts launched in the same year. Both are NVIDIA parts, and both ship as a PCIe card, so they fit the same class of system. Flopper also compares it head to head with the TPU v5e 16GB and ATOM-Max, across every published precision, memory and power. L40S vs TPU v5e 16GB →

Where do the L40S figures come from?

Every L40S figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

NVIDIA RTX 4000 SFF Ada 20GB

Full specs →

What is the NVIDIA RTX 4000 SFF Ada?

The RTX 4000 SFF Ada is a GPU from NVIDIA on the Ada Lovelace architecture, an accelerator for AI training, inference and high-performance computing. It is a PCIe add-in card, so it fits standard servers and workstations. RTX 4000 SFF Ada full specifications →

Can I rent the RTX 4000 SFF Ada in the cloud?

Yes. Cloud providers tracked by Flopper rent the RTX 4000 SFF Ada by the hour, and the pricing page compares their current rates and the price history side by side. RTX 4000 SFF Ada rental prices →

How does the RTX 4000 SFF Ada compare with other accelerators?

This page sets the RTX 4000 SFF Ada against the L40S. Both parts launched in the same year. Both are NVIDIA parts, and both ship as a PCIe card, so they fit the same class of system. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the RTX 4000 SFF Ada figures come from?

Every RTX 4000 SFF Ada figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

Specifications

L40S
RTX 4000 SFF Ada
Architecture
Ada LovelaceAda Lovelace
Launch Year
20232023
Form Factor
PCIePCIe
Memory
48 GB20 GB
Memory Bandwidth
864 GB/s280 GB/s
TDP
350 W70 W
Process Node
4nm4nm

Performance (TFLOPS)

L40S
RTX 4000 SFF Ada
1.4 TFLOPS 0.3 TFLOPS
92 TFLOPS 19 TFLOPS
183 TFLOPS
366 TFLOPS sparse
 No verified data available
362 TFLOPS
733 TFLOPS sparse
 No verified data available
362 TFLOPS
733 TFLOPS sparse
 No verified data available
733 TFLOPS
1,466 TFLOPS sparse
153 TFLOPS
307 TFLOPS sparse
FP6
No verified data available No verified data available
No verified data available No verified data available
733 TOPS
1,466 TOPS sparse
 No verified data available

Figures are dense. Where a vendor publishes a figure it sits under the dense one and never decides a winner. Hover any precision for its definition, or read the GPU glossary.

FLOPS by Precision

What actually differs

Both launched in 2023, the L40S on Ada Lovelace and the RTX 4000 SFF Ada on Ada Lovelace.

The L40S carries 28 GB more memory (48 GB against 20 GB), so larger models fit on one GPU before you shard. Bandwidth is 864 GB/s against 280 GB/s, which sets the ceiling on decode speed.

Power is 350 W against 70 W, and at FP32 the RTX 4000 SFF Ada does more work per watt. Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP64, FP32, TF32, BF16, FP16, FP8, INT8, Sparsity and TFLOPS. For how the generations relate, see NVIDIA architectures explained.

Frequently asked questions

Is the L40S faster than the RTX 4000 SFF Ada?

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 should you choose, the L40S or the RTX 4000 SFF Ada?

Choose the L40S for training and high-throughput inference: it has 4.8x the FP8 throughput of the RTX 4000 SFF Ada. It also carries 28 GB more memory, so larger models fit on one GPU before you shard. The L40S draws 280 W more power, so budget for cooling and power delivery before you commit.

Which has more memory, the L40S or the RTX 4000 SFF Ada?

The L40S carries 48 GB of memory versus 20 GB for the RTX 4000 SFF Ada. Memory bandwidth is 864 GB/s for the L40S and 280 GB/s for the RTX 4000 SFF Ada.

How much power do the L40S and the RTX 4000 SFF Ada draw?

The L40S is rated at 350 W TDP and the RTX 4000 SFF Ada at 70 W. On FP32 throughput per watt, the RTX 4000 SFF Ada is the more efficient part.

How much do the L40S and the RTX 4000 SFF Ada cost to rent?

Live cloud listings tracked by Flopper price the L40S from $0.54 per GPU-hour across 23 providers, and the RTX 4000 SFF Ada from $0.18 per GPU-hour across 2 providers. The rental section on this page links to every provider, rate and the price history for each GPU.

Where to Rent

NVIDIA L40S 48GB

Rent from

$0.54 / GPU-hr

Lowest of 41 live listings across 23 providers · median $1.46

See all L40S rental prices →

Price history and every provider on the pricing page. Some links are affiliate links.

NVIDIA RTX 4000 SFF Ada 20GB

Rent from

$0.18 / GPU-hr

Lowest of 3 live listings across 2 providers

See all RTX 4000 SFF Ada rental prices →

Price history and every provider on the pricing page. Some links are affiliate links.

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