Specifications Compared
| Spec | RTX 3080 | RTX 5090 |
|---|---|---|
| TDP | 320W | 575W |
| VRAM | 10-12 GB | 32 GB |
| CUDA Cores | 8,704 | 21,760 |
| FP4 (dense) | Not published | 1,676 TFLOPS |
| FP8 (dense) | Not published | 419 TFLOPS |
| Memory Type | GDDR6X | GDDR7 |
| Architecture | Ampere | Blackwell |
| FP16 (dense) | 59.5 TFLOPS | 209.5 TFLOPS |
| Form Factors | PCIe | PCIe |
| INT8 (dense) | 238 TOPS | 838 TOPS |
| Interconnect | PCIe 4.0 | PCIe 5.0 |
| Tensor Cores | 272 | 680 |
| FP32 Performance | 29.8 TFLOPS | 104.8 TFLOPS |
| FP64 Performance | Not published | 1.6 TFLOPS |
| Memory Bandwidth | 760 GB/s | 1,792 GB/s |
| FP4 (with sparsity) | Not published | 3,352 TFLOPS |
| FP8 (with sparsity) | Not published | 838 TFLOPS |
| FP16 (with sparsity) | 119 TFLOPS | 419 TFLOPS |
| INT8 (with sparsity) | 476 TOPS | 1,676 TOPS |
Performance Analysis
Dense FP16 performance on the RTX 5090 reaches 209.5 TFLOPS while the RTX 3080 reaches 59.5 TFLOPS, producing a 3.52 times advantage for the RTX 5090 in dense FP16 operations. The same 3.52 times ratio appears when comparing dense FP16 figures directly to each other without mixing sparsity values. Memory bandwidth of 1792 GB/s on the RTX 5090 versus 760 GB/s on the RTX 3080 supports larger batch sizes during training and inference because data movement scales with the bandwidth increase. FP32 to dense FP16 scaling remains consistent at a factor of two on both GPUs.
Current On-Demand Offers
Cheapest secure on-demand offer per provider that is reported in stock right now, per GPU per hour; multi-GPU instances show the whole-instance price alongside. Deploy opens the DeployGPU console for providers on the platform, otherwise the provider's own site. Stock is rechecked every minute.
RTX 3080
RTX 3080 is not offered on-demand by any provider we track right now. See the RTX 3080 rental page for last-seen listed prices and a price alert.
RTX 5090
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| Vast.ai | Alberta, CA | 2 | $0.87 | $1.73 | Deploy |
| RunPod | global | 1 | $1.19 | — | Deploy |
2 providers in stock, 7 offers (cheapest per provider shown). All RTX 5090 offers, price history and alerts
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When to Choose the RTX 3080
The RTX 3080 suits scenarios where power consumption must stay at 320W and VRAM needs remain within 12 GB. Workloads that fit these limits avoid the 575W TDP of the RTX 5090 while still delivering 29.8 TFLOPS FP32 and 59.5 TFLOPS dense FP16.
When to Choose the RTX 5090
The RTX 5090 fits scenarios that require 32 GB VRAM and 1792 GB/s bandwidth to handle larger models or higher throughput. Dense FP16 performance at 209.5 TFLOPS and INT8 dense performance at 838 TOPS enable these expanded workloads compared with the RTX 3080 limits.
Use Cases
The RTX 5090 provides 32 GB VRAM and 209.5 TFLOPS dense FP16 to support larger training batches than the 12 GB limit on the RTX 3080.
The RTX 5090 delivers 209.5 TFLOPS dense FP16 and 1792 GB/s bandwidth for higher inference throughput than the 59.5 TFLOPS dense FP16 on the RTX 3080.
The RTX 5090 supplies 32 GB VRAM and 838 TOPS INT8 dense to accommodate fine-tuning workloads beyond the 12 GB and 238 TOPS INT8 dense capacity of the RTX 3080.
The RTX 3080 meets requirements at 320W TDP with 29.8 TFLOPS FP32 while the RTX 5090 provides 104.8 TFLOPS FP32 when higher performance justifies the 575W TDP.
Frequently Asked Questions
What is the memory bandwidth difference?▾
The RTX 3080 lists 760 GB/s bandwidth and the RTX 5090 lists 1792 GB/s bandwidth.
What FP32 performance do the GPUs deliver?▾
The RTX 3080 reaches 29.8 TFLOPS FP32 and the RTX 5090 reaches 104.8 TFLOPS FP32.
How do the dense FP16 figures compare?▾
The RTX 3080 reaches 59.5 TFLOPS dense FP16 and the RTX 5090 reaches 209.5 TFLOPS dense FP16.
What TDP values are listed for each card?▾
The RTX 3080 carries a 320W TDP and the RTX 5090 carries a 575W TDP.
Which GPU has higher INT8 dense performance?▾
The RTX 5090 reaches 838 TOPS INT8 dense while the RTX 3080 reaches 238 TOPS INT8 dense.
Which is cheaper to rent, the RTX 3080 or the RTX 5090?▾
Cloud rental prices for both the RTX 3080 and RTX 5090 vary by provider, configuration, and availability. This page shows live pricing from 25+ providers updated every 60 seconds. Scroll to the Live Cloud Pricing section to compare current rates.
How much VRAM does the RTX 3080 have compared to the RTX 5090?▾
The RTX 3080 has 10 to 12 GB of GDDR6X memory. The RTX 5090 has 32 GB of GDDR7 memory.
Can I find RTX 3080 and RTX 5090 GPUs available to rent right now?▾
Yes. This page shows real-time availability across 25+ cloud GPU providers. The Live Cloud Pricing section displays only in-stock offers with current pricing.
What is the main difference between the RTX 3080 and the RTX 5090?▾
The RTX 3080 uses the Ampere architecture (2020) while the RTX 5090 uses Blackwell (2025). The RTX 5090 delivers 3.5x the dense FP16 throughput (209.5 vs 59.5 TFLOPS, both without sparsity) and 2.4x the memory bandwidth of the RTX 3080.
Rent these GPUs
Each GPU page lists every current on-demand offer by provider, per GPU-hour, updated every minute.
Related comparisons
How this page is made
- Specifications come from the NVIDIA, AMD and Intel datasheets for the RTX 3080 and the RTX 5090. Dense and sparse throughput are listed separately.
- Prices and availability are live: every offer shown is an in-stock, on-demand listing from a provider we track, rechecked every minute.
- The written comparison (overview, performance notes, when to choose each card, verdict, use cases and FAQ) was drafted with an AI model from the specification table above and passed an automated check that rejects any figure not in that table. It was last generated on . It contains no prices; those are always read live.
- Read how we collect the data, or report an error on this page.
Next steps
- Rent RTX 3080Every current offer by provider, daily price history and a price alert.
- Rent RTX 5090Every current offer by provider, daily price history and a price alert.
- GPU price indexHow on-demand prices for the major GPUs have moved, updated daily.
- All GPUsEvery GPU we track, with current lows and provider counts.