--- title: "RTX 5080 vs RTX 4090: Specs & Price per Hour (2026) | LowCostGPU" description: "RTX 5080 vs RTX 4090: 16 vs 24 GB VRAM, 225 vs 330 FP16 TFLOPS, $0.234 vs $0.354/hr on LowCostGPU. Specs side by side, live rental prices, which to rent." url: https://lowcostgpu.com/compare/rtx-5080-vs-rtx-4090 last_modified: 2026-10-20T10:29:15+00:00 prices_as_of: 2026-10-19 site: LowCostGPU (lowcostgpu.com) --- Compare · prices checked 2026-10-19 # RTX 5080 vs RTX 4090: specs, price per hour, which to rent NVIDIA RTX 5080 (16 GB, **$0.234** /hr) against NVIDIA RTX 4090 (24 GB, **$0.354** /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 5080 Blackwell · 16 GB GDDR7 · 225 FP16 TFLOPS · $0.234/hr on-demand · $0.117/hr interruptible · 103 online](https://lowcostgpu.com/gpu/rtx-5080) - [NVIDIA RTX 4090 Ada Lovelace · 24 GB GDDR6X · 330 FP16 TFLOPS · $0.354/hr on-demand · $0.177/hr interruptible · 476 online](https://lowcostgpu.com/gpu/rtx-4090) ## RTX 5080 vs RTX 4090 specifications Public NVIDIA figures (dense, non-sparsity). The last column is RTX 5080 relative to RTX 4090. | Spec | RTX 5080 | RTX 4090 | Difference | | --- | --- | --- | --- | | Architecture | Blackwell (2025) | Ada Lovelace (2022) | — | | VRAM | 16 GB GDDR7 | 24 GB GDDR6X | −33% | | Memory bandwidth | 960 GB/s | 1,008 GB/s | −5% | | FP16 tensor (dense) | 225 TFLOPS | 330 TFLOPS | −32% | | FP32 | 56.3 TFLOPS | 82.6 TFLOPS | −32% | | CUDA cores | 10,752 | 16,384 | −34% | | TDP | 360 W | 450 W | −20% | | PCIe · NVLink | Gen 5.0 · no NVLink | Gen 4.0 · no NVLink | — | | PowerScore (RTX 3090 = 100) | 158 | 232 | −32% | | Max GPUs per machine | 8× | 8× | — | ## RTX 5080 vs RTX 4090 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 5080 | RTX 4090 | Cheaper | | --- | --- | --- | --- | | On-demand, per GPU-hour | $0.234 | $0.354 | RTX 5080 (−34%) | | Interruptible, per GPU-hour | $0.117 | $0.177 | RTX 5080 | | Reserved (3 mo), per GPU-hour | $0.152 | $0.230 | RTX 5080 | | On-demand, per month | $171 | $258 | RTX 5080 | | Market median (reference) | $0.33 | $0.51 | — | | $ per 1,000 FP16 TFLOP-hours | $1.04 | $1.07 | RTX 5080 (better value) | | $ per GB of VRAM per hour | $0.0146 | $0.0148 | RTX 5080 (better value) | Try a full month with storage and bandwidth in the [GPU cost calculator](https://lowcostgpu.com/calculator). ## What fits in VRAM: 16 GB vs 24 GB | Workload | RTX 5080 | RTX 4090 | | --- | --- | --- | | Largest LLM in FP16, one card | ~3B | ~8B | | Largest LLM at 4-bit, one card | ~24B | ~32B | | Flux dev (FP8, ~17 GB) | tight | fits | | Wan 2.x 14B video (offloaded) | no | yes | | 70B 4-bit LLM on one card | no | no | 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://lowcostgpu.com/guides/llm-vram-requirements). ## Verdict: which should you rent? The RTX 5080 has 16 GB GDDR7 and FP4 tensor cores; the RTX 4090 has 24 GB GDDR6X and more CUDA cores. The 4090's extra 8 GB decides most AI jobs; the 5080 is the cheaper pick for workloads that fit in 16 GB. - **Cheaper per hour:** RTX 5080 ($0.234 vs $0.354, −34%). - **More VRAM:** RTX 4090 (24 GB vs 16 GB). - **More FP16 throughput:** RTX 4090 (about 1.5×). - **Best value per TFLOP-hour:** RTX 5080. - **Best value per GB of VRAM:** RTX 5080. - **Multi-GPU:** RTX 5080 over PCIe · RTX 4090 over PCIe. ## Related comparisons [All comparisons](https://lowcostgpu.com/compare) - [RTX 5090 vs RTX 4090 $0.481 vs $0.354 per hour](https://lowcostgpu.com/compare/rtx-5090-vs-rtx-4090) - [RTX 4090 vs RTX 3090 $0.354 vs $0.148 per hour](https://lowcostgpu.com/compare/rtx-4090-vs-rtx-3090) - [RTX 4090 vs A100 PCIE $0.354 vs $0.388 per hour](https://lowcostgpu.com/compare/rtx-4090-vs-a100-pcie) - [RTX 4090 vs L40S $0.354 vs $0.448 per hour](https://lowcostgpu.com/compare/rtx-4090-vs-l40s) - [RTX A6000 vs RTX 4090 $0.281 vs $0.354 per hour](https://lowcostgpu.com/compare/rtx-a6000-vs-rtx-4090) ## RTX 5080 vs RTX 4090: FAQ Deeper reading: [H100 vs H200 vs B200](https://lowcostgpu.com/guides/h100-vs-h200-vs-b200), [RTX 4090 vs RTX 5090](https://lowcostgpu.com/guides/rtx-4090-vs-rtx-5090), [how cloud GPU pricing works](https://lowcostgpu.com/guides/cloud-gpu-pricing-explained). **Is the RTX 4090 faster than the RTX 5080?** On dense FP16 tensor throughput the RTX 4090 leads by about 1.5× (330 vs 225 TFLOPS). Memory bandwidth matters as much for inference: RTX 5080 960 GB/s vs RTX 4090 1,008 GB/s. **Which is cheaper to rent, the RTX 5080 or the RTX 4090?** The RTX 5080: $0.234/hr on-demand versus $0.354/hr — 34% less. Interruptible rates are $0.117 (RTX 5080) and $0.177 (RTX 4090). Per TFLOP-hour the better value is the RTX 5080. **Which has more VRAM and what does that change?** The RTX 4090 has 24 GB versus 16 GB. In LLM terms that is roughly a 8B FP16 model (or ~32B in 4-bit) on one card against 3B FP16 (~24B 4-bit). If the model does not fit, speed is irrelevant. **Can I rent both on LowCostGPU right now?** Yes — 103 × RTX 5080 and 476 × RTX 4090 are online as this page renders, deployable in about 30 seconds, billed per second, paid in crypto with no KYC. --- *About LowCostGPU:* LowCostGPU (lowcostgpu.com) is a cloud GPU rental service offering 83 NVIDIA GPU models — from the Tesla P4 at $0.019/hr to the B300 — at fixed prices set at least 30% below the public GPU marketplace median and re-checked weekly (H100 SXM: $1.680/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.lowcostgpu.com) or the REST API. Source: https://lowcostgpu.com/compare/rtx-5080-vs-rtx-4090 · Site index for AI assistants: https://lowcostgpu.com/llms.txt · Full content: https://lowcostgpu.com/llms-full.txt