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NVIDIA GeForce RTX 4090 24GB vs NVIDIA L40S 48GB

The L40S delivers 2.2x the FP8 throughput of the GeForce RTX 4090 (733 vs 330 TFLOPS dense). The L40S also carries 24 GB more memory (48 GB vs 24 GB).

GeForce RTX 4090: Ada Lovelace, 2022 L40S: Ada Lovelace, 2023
FP8 dense lead
2.2x
L40S: 733 vs 330 TFLOPS
Memory
24 vs 48 GB
24 GB more for the L40S
Bandwidth
1.0 TB/s vs 864 GB/s
GeForce RTX 4090 moves data faster
TDP
450 W vs 350 W
L40S draws 100 W less
See rental pricing from $0.30/hr Download comparison sheet

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NVIDIA GeForce RTX 4090 24GB vs NVIDIA L40S 48GB

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NVIDIA GeForce RTX 4090 24GB

Full specs →

What is the NVIDIA GeForce RTX 4090?

The GeForce RTX 4090 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. GeForce RTX 4090 full specifications →

Can I rent the GeForce RTX 4090 in the cloud?

Yes. Cloud providers tracked by Flopper rent the GeForce RTX 4090 by the hour, and the pricing page compares their current rates and the price history side by side. GeForce RTX 4090 rental prices →

How does the GeForce RTX 4090 compare with other accelerators?

This page sets the GeForce RTX 4090 against the L40S. The GeForce RTX 4090 is the older generation of the two. 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 Wormhole n150s, across every published precision, memory and power. GeForce RTX 4090 vs Wormhole n150s →

Where do the GeForce RTX 4090 figures come from?

NVIDIA published the GeForce RTX 4090 figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

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 GeForce RTX 4090. The L40S is the newer generation of the two. 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 →

Specifications

GeForce RTX 4090
L40S
Architecture
Ada LovelaceAda Lovelace
Launch Year
20222023
Form Factor
PCIePCIe
Memory
24 GB48 GB
Memory Bandwidth
1.0 TB/s864 GB/s
TDP
450 W350 W
Process Node
4nm4nm

Performance (TFLOPS)

GeForce RTX 4090
L40S
1.3 TFLOPS 1.4 TFLOPS
83 TFLOPS 92 TFLOPS
83 TFLOPS
sparse not published
183 TFLOPS
366 TFLOPS sparse
165 TFLOPS
sparse not published
362 TFLOPS
733 TFLOPS sparse
165 TFLOPS
sparse not published
362 TFLOPS
733 TFLOPS sparse
330 TFLOPS
sparse not published
733 TFLOPS
1,466 TFLOPS sparse
FP6
No verified data available No verified data available
No verified data available No verified data available
661 TOPS
1,321 TOPS sparse
733 TOPS
1,466 TOPS sparse

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

The L40S is the newer part: Ada Lovelace (2023) against the GeForce RTX 4090's Ada Lovelace (2022).

The L40S carries 24 GB more memory (48 GB against 24 GB), so larger models fit on one GPU before you shard. Bandwidth is 1.0 TB/s against 864 GB/s, which sets the ceiling on decode speed.

Power is 450 W against 350 W, and at FP32 the L40S 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 GeForce RTX 4090 faster than the L40S?

At FP8 precision the L40S reaches 733 TFLOPS dense against 330 TFLOPS for the GeForce RTX 4090. The performance table on this page lists every published precision for both GPUs.

Which should you choose, the GeForce RTX 4090 or the L40S?

Choose the L40S for training and high-throughput inference: it has 2.2x the FP8 throughput of the GeForce RTX 4090. It also carries 24 GB more memory, so larger models fit on one GPU before you shard. The L40S draws 100 W less power, which matters in an air-cooled or power-capped rack.

Which has more memory, the GeForce RTX 4090 or the L40S?

The L40S carries 48 GB of memory versus 24 GB for the GeForce RTX 4090. Memory bandwidth is 1.0 TB/s for the GeForce RTX 4090 and 864 GB/s for the L40S.

How much power do the GeForce RTX 4090 and the L40S draw?

The GeForce RTX 4090 is rated at 450 W TDP and the L40S at 350 W. On FP32 throughput per watt, the L40S is the more efficient part.

How much do the GeForce RTX 4090 and the L40S cost to rent?

Live cloud listings tracked by Flopper price the GeForce RTX 4090 from $0.30 per GPU-hour across 9 providers, and the L40S from $0.53 per GPU-hour across 25 providers. The rental section on this page links to every provider, rate and the price history for each GPU.

Where to Rent

NVIDIA GeForce RTX 4090 24GB

Rent from

$0.30 / GPU-hr

Lowest of 16 live listings across 9 providers · median $0.89

See all GeForce RTX 4090 rental prices →

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

NVIDIA L40S 48GB

Rent from

$0.53 / GPU-hr

Lowest of 44 live listings across 25 providers · median $1.50

See all L40S rental prices →

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

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