NVIDIA L40S VS NVIDIA GeForce RTX 4090
Both the L40S and RTX 4090 are built on NVIDIA's Ada Lovelace architecture. This comparison helps you choose between different configurations within the same GPU family.
RTX 4090
📊 Detailed Specifications Comparison
| Specification | L40S | RTX 4090 | Difference |
|---|---|---|---|
| Architecture & Design | |||
| Architecture | Ada Lovelace | Ada Lovelace | - |
| Process Node | 4nm | 4nm | - |
| Target Market | datacenter | consumer | - |
| Form Factor | Dual-slot PCIe | 3-slot PCIe | - |
| Memory | |||
| VRAM Capacity | 48GB | 24GB | +100% |
| Memory Type | GDDR6 | GDDR6X | - |
| Memory Bandwidth | 864 GB/s | 1.01 TB/s | -14% |
| Memory Bus | 384-bit | 384-bit | - |
| Compute Units | |||
| CUDA Cores | 18,176 | 16,384 | +11% |
| Tensor Cores | 568 | 512 | +11% |
| Performance (TFLOPS) | |||
| FP32 (Single Precision) | 91.6 TFLOPS | 82.58 TFLOPS | +11% |
| FP16 (Half Precision) | 183.2 TFLOPS | 165.15 TFLOPS | +11% |
| Power & Connectivity | |||
| TDP (Power) | 350W | 450W | -22% |
| PCIe | PCIe 4.0 x16 | PCIe 4.0 x16 | - |
🎯 Use Case Recommendations
LLM & Large Model Training
NVIDIA L40S
Higher VRAM capacity and memory bandwidth are critical for training large language models. The L40S offers 48GB compared to 24GB.
AI Inference
NVIDIA L40S
For inference workloads, performance per watt matters most. Consider the balance between FP16/INT8 throughput and power consumption.
Budget-Conscious Choice
NVIDIA GeForce RTX 4090
Based on current cloud pricing, the RTX 4090 starts at a lower hourly rate.
NVIDIA L40S is Best For:
- AI inference
- Generative AI
- Maximum memory bandwidth
NVIDIA GeForce RTX 4090 is Best For:
- Image generation
- AI development
- Enterprise production
Frequently Asked Questions
Which GPU is better for AI training: L40S or RTX 4090?
For AI training, the key factors are VRAM size, memory bandwidth, and tensor core performance. The L40S offers 48GB of GDDR6 memory with 864 GB/s bandwidth, while the RTX 4090 provides 24GB of GDDR6X with 1.01 TB/s bandwidth. For larger models, the L40S's higher VRAM capacity gives it an advantage.
What is the price difference between L40S and RTX 4090 in the cloud?
Cloud GPU rental prices vary by provider and region. Based on our data, L40S starts at $0.32/hour while RTX 4090 starts at $0.20/hour. This represents a 60% price difference.
Can I use RTX 4090 instead of L40S for my workload?
It depends on your specific requirements. If your model fits within 24GB of VRAM and you don't need the additional throughput of the L40S, the RTX 4090 can be a cost-effective alternative. However, for workloads requiring maximum memory capacity or multi-GPU scaling, the L40S's architecture may be essential.
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