L40S vs RTX 4000 SFF Ada: Specs, VRAM & Price
Short answer: choose the L40S when 48 GB of VRAM is the gating requirement. Choose the RTX 4000 SFF Ada when 20 GB is enough for the workload and the lower hourly rate points that way.
The L40S has 48 GB of VRAM; the RTX 4000 SFF Ada has 20 GB.
You can rent both by the hour, no purchase required. L40S from $0.698/GPU/hr; RTX 4000 SFF Ada from $0.198/GPU/hr. The RTX 4000 SFF Ada is 72% cheaper at the entry rate.
L40S
Good for fine-tuning mid-size models and high-throughput inference
RTX 4000 SFF Ada
Good for inference and light fine-tuning workloads
Last updated: 2026-10-10 17:47:27 UTCRefreshes hourly
Specs side by side
| Spec | L40S | RTX 4000 SFF Ada |
|---|---|---|
| VRAM | 48 GB | 20 GB |
| Memory bandwidth | 864 GB/s | – |
| Architecture | Ada Lovelace | Ada Lovelace |
| Compute capability | 8.9 | 8.9 |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, BF16, FP8, INT4 |
| Peak FP16/BF16 tensor TFLOPS | 362 TFLOPS | – |
| Peak FP8 tensor TFLOPS | 733 TFLOPS | – |
| Max board power (TDP) | 350W | – |
| Form factor | PCIe | – |
| Regions | 5 | 1 |
On-demand price
| Rate | L40S | RTX 4000 SFF Ada |
|---|---|---|
| Lowest per GPU/hr | $1.07/GPU/hr | $0.198/GPU/hr (cheapest overall) |
Which is better for AI: L40S or RTX 4000 SFF Ada?
Choose the L40S when 48 GB of VRAM is the gating requirement. Choose the RTX 4000 SFF Ada when 20 GB is enough for the workload and the lower hourly rate points that way.
L40S vs RTX 4000 SFF Ada: common questions
Is the L40S or the RTX 4000 SFF Ada better for AI?
Short answer: choose the L40S when 48 GB of VRAM is the gating requirement. Choose the RTX 4000 SFF Ada when 20 GB is enough for the workload and the lower hourly rate points that way.
Is the L40S or the RTX 4000 SFF Ada cheaper to rent?
On Aquanode's live marketplace the L40S starts at $0.698/GPU/hr (median $1.20/GPU/hr) and the RTX 4000 SFF Ada starts at $0.198/GPU/hr (median $0.198/GPU/hr). The RTX 4000 SFF Ada is the cheaper of the two at the entry rate, by 72%.
What is the difference between the L40S and the RTX 4000 SFF Ada?
The L40S has 48 GB of VRAM against the RTX 4000 SFF Ada's 20 GB; both are Ada Lovelace parts; both run BF16, FP8, INT4 workloads in hardware. On price, the L40S lists from $0.698/GPU/hr and the RTX 4000 SFF Ada from $0.198/GPU/hr.
How widely available are the L40S and the RTX 4000 SFF Ada?
The L40S is listed in 5 regions and the RTX 4000 SFF Ada in 1 region right now.
How much does 1,000 GPU-hours cost on the L40S vs the RTX 4000 SFF Ada?
At the lowest rates listed today, 1,000 GPU-hours costs $698 on the L40S and $198 on the RTX 4000 SFF Ada, a difference of $500 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the L40S have compared to the RTX 4000 SFF Ada?
The L40S has 48 GB of VRAM; the RTX 4000 SFF Ada has 20 GB.
How this comparison is calculated
Every price is normalized to a per-GPU hourly rate using the same pipeline as every other pricing surface on Aquanode, and only the cheapest qualifying offer per provider is shown. A dash means that provider does not currently list that GPU.
Architecture, compute capability and supported precisions come from each vendor's published datasheet for that generation, not from the marketplace feed. This page regenerates at most once per hour.
Memory bandwidth, tensor TFLOPS, NVLink/interconnect and max board power are the same verified-from-datasheet figures shown on each model's own L40S page and RTX 4000 SFF Ada page, which link the primary vendor source for that model. A dash here means Aquanode hasn't verified that figure from a primary source yet, never a guess.
Go further
Check what fits in each card's memory with the L40S VRAM calculator and the RTX 4000 SFF Ada VRAM calculator, see vendor-published throughput in the GPU benchmarks and specs table, or browse every model by generation in the GPU index.
More L40S comparisons
More RTX 4000 SFF Ada comparisons
Related reading: L40S pricing and specs, and The best GPUs for AI, ranked.
