--- title: "RTX 4090 vs L40S: Specs & Price per Hour (2026) | PowerGPU" description: "RTX 4090 vs L40S: 24 vs 48 GB VRAM, 330 vs 362 FP16 TFLOPS, $0.327 vs $0.514/hr on PowerGPU. Specs side by side, live rental prices, which to rent." url: https://powergpu.ai/compare/rtx-4090-vs-l40s last_modified: 2026-09-14T11:04:20+00:00 prices_as_of: 2026-09-14 site: PowerGPU (powergpu.ai) --- Compare · prices checked 2026-09-14 # RTX 4090 vs L40S: specs, price per hour, which to rent NVIDIA RTX 4090 (24 GB, **$0.327** /hr) against NVIDIA L40S (48 GB, **$0.514** /hr): public specs side by side, live fixed prices from our sheet, what fits in each card's VRAM, and a verdict written for real workloads — both are rentable right now. - [NVIDIA RTX 4090 Ada Lovelace · 24 GB GDDR6X · 330 FP16 TFLOPS · $0.327/hr on-demand · $0.163/hr interruptible · 461 online](https://powergpu.ai/gpu/rtx-4090) - [NVIDIA L40S Ada Lovelace · 48 GB GDDR6 · 362 FP16 TFLOPS · $0.514/hr on-demand · $0.257/hr interruptible · 107 online](https://powergpu.ai/gpu/l40s) ## RTX 4090 vs L40S specifications Public NVIDIA figures (dense, non-sparsity). The last column is RTX 4090 relative to L40S. | Spec | RTX 4090 | L40S | Difference | | --- | --- | --- | --- | | Architecture | Ada Lovelace (2022) | Ada Lovelace (2023) | — | | VRAM | 24 GB GDDR6X | 48 GB GDDR6 | −50% | | Memory bandwidth | 1,008 GB/s | 864 GB/s | +17% | | FP16 tensor (dense) | 330 TFLOPS | 362 TFLOPS | −9% | | FP32 | 82.6 TFLOPS | 91.6 TFLOPS | −10% | | CUDA cores | 16,384 | 18,176 | −10% | | TDP | 450 W | 350 W | +29% | | PCIe · NVLink | Gen 4.0 · no NVLink | Gen 4.0 · no NVLink | — | | PowerScore (RTX 3090 = 100) | 232 | 255 | −9% | | Max GPUs per machine | 8× | 8× | — | ## RTX 4090 vs L40S price per hour Fixed rates from our sheet — every on-demand price is the marketplace median × 0.70, rounded down. Monthly = 730 hours. | Rate | RTX 4090 | L40S | Cheaper | | --- | --- | --- | --- | | On-demand, per GPU-hour | $0.327 | $0.514 | RTX 4090 (−36%) | | Interruptible, per GPU-hour | $0.163 | $0.257 | RTX 4090 | | Reserved (3 mo), per GPU-hour | $0.212 | $0.334 | RTX 4090 | | On-demand, per month | $239 | $375 | RTX 4090 | | Market median (reference) | $0.47 | $0.74 | — | | $ per 1,000 FP16 TFLOP-hours | $0.99 | $1.42 | RTX 4090 (better value) | | $ per GB of VRAM per hour | $0.0136 | $0.0107 | L40S (better value) | Try a full month with storage and bandwidth in the [GPU cost calculator](https://powergpu.ai/calculator). ## What fits in VRAM: 24 GB vs 48 GB | Workload | RTX 4090 | L40S | | --- | --- | --- | | Largest LLM in FP16, one card | ~8B | ~14B | | Largest LLM at 4-bit, one card | ~32B | ~72B | | Flux dev (FP8, ~17 GB) | fits | fits | | Wan 2.x 14B video (offloaded) | yes | yes | | 70B 4-bit LLM on one card | no | yes | Rules of thumb: ~2.4 GB per billion parameters in FP16 all-in, ~0.62 GB in 4-bit. Full tables in the [VRAM guide](https://powergpu.ai/guides/llm-vram-requirements). ## Verdict: which should you rent? The L40S is the datacenter Ada card: 48 GB, passive cooling, FP8, built for 24/7 duty; the RTX 4090 has similar per-clock throughput, 24 GB and a lower rate. Serve production endpoints on the L40S; run interactive and batch generation on the 4090. - **Cheaper per hour:** RTX 4090 ($0.327 vs $0.514, −36%). - **More VRAM:** L40S (48 GB vs 24 GB). - **More FP16 throughput:** L40S (about 1.1×). - **Best value per TFLOP-hour:** RTX 4090. - **Best value per GB of VRAM:** L40S. - **Multi-GPU:** RTX 4090 over PCIe · L40S over PCIe. ## Related comparisons [All comparisons](https://powergpu.ai/compare) - [RTX 5090 vs RTX 4090 $0.439 vs $0.327 per hour](https://powergpu.ai/compare/rtx-5090-vs-rtx-4090) - [RTX 4090 vs RTX 3090 $0.327 vs $0.108 per hour](https://powergpu.ai/compare/rtx-4090-vs-rtx-3090) - [RTX 4090 vs A100 PCIE $0.327 vs $0.374 per hour](https://powergpu.ai/compare/rtx-4090-vs-a100-pcie) - [L40S vs A100 PCIE $0.514 vs $0.374 per hour](https://powergpu.ai/compare/l40s-vs-a100-pcie) - [L40S vs H100 PCIE $0.514 vs $1.867 per hour](https://powergpu.ai/compare/l40s-vs-h100-pcie) - [RTX 5090 vs L40S $0.439 vs $0.514 per hour](https://powergpu.ai/compare/rtx-5090-vs-l40s) ## RTX 4090 vs L40S: FAQ Deeper reading: [H100 vs H200 vs B200](https://powergpu.ai/guides/h100-vs-h200-vs-b200), [RTX 4090 vs RTX 5090](https://powergpu.ai/guides/rtx-4090-vs-rtx-5090), [how cloud GPU pricing works](https://powergpu.ai/guides/cloud-gpu-pricing-explained). **Is the L40S faster than the RTX 4090?** On dense FP16 tensor throughput the L40S leads by about 1.1× (362 vs 330 TFLOPS). Memory bandwidth matters as much for inference: RTX 4090 1,008 GB/s vs L40S 864 GB/s. **Which is cheaper to rent, the RTX 4090 or the L40S?** The RTX 4090: $0.327/hr on-demand versus $0.514/hr — 36% less. Interruptible rates are $0.163 (RTX 4090) and $0.257 (L40S). Per TFLOP-hour the better value is the RTX 4090. **Which has more VRAM and what does that change?** The L40S has 48 GB versus 24 GB. In LLM terms that is roughly a 14B FP16 model (or ~72B in 4-bit) on one card against 8B FP16 (~32B 4-bit). If the model does not fit, speed is irrelevant. **Can I rent both on PowerGPU right now?** Yes — 461 × RTX 4090 and 107 × L40S are online as this page renders, deployable in about 30 seconds, billed per second, paid in crypto with no KYC. --- *About PowerGPU:* PowerGPU (powergpu.ai) is a cloud GPU rental service offering 80 NVIDIA GPU models — from the RTX A2000 at $0.024/hr to the B300 — at fixed prices set at least 30% below the public GPU marketplace median and re-checked weekly (H100 SXM: $1.428/hr on-demand). Billing is per second with no minimums; payment is crypto only (USDT, BTC, XMR, ETH, SOL, LTC, TRX) with no KYC. Instances run in Tier-III datacenters across 32 regions with a 99.9% uptime SLA and deploy in about 30 seconds from the web console (cloud.powergpu.ai) or the REST API. Source: https://powergpu.ai/compare/rtx-4090-vs-l40s · Site index for AI assistants: https://powergpu.ai/llms.txt · Full content: https://powergpu.ai/llms-full.txt