NVIDIA L20 48GB vs NVIDIA GeForce RTX 4090 24GB
The GeForce RTX 4090 delivers 38% more FP8 throughput than the L20 (330 vs 239 TFLOPS dense). The L20 counters with 24 GB more memory (48 GB vs 24 GB).
NVIDIA L20 48GB
Full specs →NVIDIA GeForce RTX 4090 24GB
Full specs →Specifications
| Spec | NVIDIA L20 48GB | NVIDIA GeForce RTX 4090 24GB |
|---|---|---|
| Architecture | Ada Lovelace | Ada Lovelace |
| Launch Year | 2024 | 2022 |
| Form Factor | PCIe | PCIe |
| VRAM | 48 GB MORE | 24 GB |
| Memory Bandwidth | 864 GB/s | 1.0 TB/s FASTER |
| TDP | 275 W | 450 W |
| Process Node | — | 4nm |
Performance (TFLOPS)
| Precision | NVIDIA L20 48GB | NVIDIA GeForce RTX 4090 24GB |
|---|---|---|
| FP64 | — | 1.3 TFlops |
| FP32 | 59.8 TFlops | 82.6 TFlops BEST |
| FP16 | 119.5 TFlops sparse not published | 165.2 TFlops BEST sparse not published |
| BF16 | 119.5 TFlops sparse not published | 165.2 TFlops BEST sparse not published |
| FP8 | 239.0 TFlops sparse not published | 330.3 TFlops BEST sparse not published |
| INT8 | 239.0 TFlops sparse not published | 330.3 TFlops BEST sparse not published |
FLOPS by Precision
What actually differs
The L20 is the newer part: Ada Lovelace, launched in 2024, against the GeForce RTX 4090's Ada Lovelace from 2022. Newer architectures typically add lower-precision formats and better throughput per watt, so check the precision rows your workload actually uses.
Dense throughput for the L20 against the GeForce RTX 4090: FP32 60 vs 83 TFLOPS, FP16 120 vs 165 TFLOPS, FP8 239 vs 330 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 48 GB against 24 GB, fed at 864 GB/s versus 1.0 TB/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 275 W for the L20 and 450 W for the GeForce RTX 4090. At FP32 that works out to 0.22 against 0.18 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 L20 faster than the GeForce RTX 4090?
At FP8 precision the GeForce RTX 4090 reaches 330 TFLOPS dense against 239 TFLOPS for the L20. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the L20 or the GeForce RTX 4090?
The L20 carries 48 GB of VRAM versus 24 GB for the GeForce RTX 4090. Memory bandwidth is 864 GB/s for the L20 and 1.0 TB/s for the GeForce RTX 4090.
How much power do the L20 and the GeForce RTX 4090 draw?
The L20 is rated at 275 W TDP and the GeForce RTX 4090 at 450 W. On FP32 throughput per watt, the L20 is the more efficient part.
Can I rent the L20 or the GeForce RTX 4090 in the cloud?
Yes. Live cloud listings tracked by Flopper start at $0.13 per GPU hour. The rental pricing section on this page lists current providers and rates for both GPUs.
Where to Rent
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