Specifications Compared
| Spec | A100 | RTX 5090 |
|---|---|---|
| TDP | 400W | 575W |
| VRAM | 40-80 GB | 32 GB |
| CUDA Cores | 6,912 | 21,760 |
| FP4 (dense) | Not published | 1,676 TFLOPS |
| FP8 (dense) | Not published | 419 TFLOPS |
| Memory Type | HBM2e | GDDR7 |
| Architecture | Ampere | Blackwell |
| FP16 (dense) | 312 TFLOPS | 209.5 TFLOPS |
| Form Factors | SXM4, PCIe | PCIe |
| INT8 (dense) | 624 TOPS | 838 TOPS |
| Interconnect | NVLink, PCIe 4.0, InfiniBand | PCIe 5.0 |
| Tensor Cores | 432 | 680 |
| FP32 Performance | 19.5 TFLOPS | 104.8 TFLOPS |
| FP64 Performance | 9.7 TFLOPS | 1.6 TFLOPS |
| Memory Bandwidth | 2,039 GB/s | 1,792 GB/s |
| FP4 (with sparsity) | Not published | 3,352 TFLOPS |
| FP8 (with sparsity) | Not published | 838 TFLOPS |
| FP16 (with sparsity) | 624 TFLOPS | 419 TFLOPS |
| INT8 (with sparsity) | 1,248 TOPS | 1,676 TOPS |
Performance Analysis
The FP16 dense figure of 312 TFLOPS on the A100 exceeds the 209.5 TFLOPS dense FP16 on the RTX 5090 by a ratio of 1.49 to 1. This gap affects training speed for models that rely on dense FP16 operations while the A100 FP32 at 19.5 TFLOPS trails the RTX 5090 FP32 at 104.8 TFLOPS by a ratio of 5.37 to 1. Inference workloads that use dense FP16 therefore favor the A100 whereas FP32 heavy scientific tasks align with the RTX 5090. Memory bandwidth of 2039 GB/s on the A100 versus 1792 GB/s on the RTX 5090 permits larger batch sizes in memory bound scenarios. The A100 TDP of 400W remains lower than the 575W TDP of the RTX 5090 which influences sustained operation under load.
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.
A100
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| Vast.ai | Slovenia, SI | 1 | $0.67 | — | Deploy |
| LeaderGPU | The Netherlands | 8 | $0.68 | $5.42 | Deploy |
| ThunderCompute | USA | 1 | $1.09 | — | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.35 | — | Deploy |
| Massed Compute | us-central-3 | 2 | $1.35 | $2.70 | Deploy |
12 providers in stock, 34 offers (cheapest per provider shown). All A100 offers, price history and alerts
RTX 5090
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| Vast.ai | South Korea, KR | 1 | $0.53 | — | Deploy |
| LeaderGPU | The Netherlands | 1 | $2.29 | — | Deploy |
2 providers in stock, 11 offers (cheapest per provider shown). All RTX 5090 offers, price history and alerts
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When to Choose the A100
The A100 suits scenarios that require up to 80 GB HBM2e memory and 2039 GB/s bandwidth for large scale model handling. Its dense FP16 performance of 312 TFLOPS and support for NVLink interconnect provide advantages in distributed training setups that exceed the 32 GB limit of the RTX 5090.
When to Choose the RTX 5090
Its FP8 dense figure of 419 TFLOPS enables newer precision formats unavailable on the A100 for inference tasks that fit within 32 GB GDDR7.
Use Cases
The A100 supplies up to 80 GB HBM2e and 2039 GB/s bandwidth that accommodate larger models than the 32 GB on the RTX 5090.
Dense FP16 at 312 TFLOPS on the A100 surpasses the 209.5 TFLOPS dense FP16 on the RTX 5090 for throughput in supported precision.
The A100 INT8 dense at 624 TOPS and higher memory bandwidth enable efficient updates compared to the RTX 5090 at 838 TOPS INT8 dense with lower bandwidth.
The RTX 5090 FP32 at 104.8 TFLOPS exceeds the A100 at 19.5 TFLOPS for generation tasks that fit in 32 GB.
The RTX 5090 delivers 104.8 TFLOPS FP32 which is 5.37 times the 19.5 TFLOPS FP32 on the A100 for precision heavy calculations.
Frequently Asked Questions
How does A100 memory compare to RTX 5090 memory?▾
The A100 offers 40 to 80 GB HBM2e while the RTX 5090 provides 32 GB GDDR7. The A100 bandwidth reaches 2039 GB/s against 1792 GB/s on the RTX 5090.
What FP16 performance separates the A100 from the RTX 5090?▾
The A100 achieves 312 TFLOPS dense FP16 and 624 TFLOPS with sparsity. The RTX 5090 reaches 209.5 TFLOPS dense FP16 and 419 TFLOPS with sparsity.
Which GPU has higher FP32 performance?▾
The RTX 5090 reaches 104.8 TFLOPS FP32 while the A100 reaches 19.5 TFLOPS FP32.
How do TDP values differ between the A100 and RTX 5090?▾
The A100 TDP is 400W and the RTX 5090 TDP is 575W.
Does the A100 support NVLink?▾
The A100 supports NVLink interconnect along with PCIe 4.0 and InfiniBand. The RTX 5090 uses PCIe 5.0 without NVLink.
Which is cheaper to rent, the A100 or the RTX 5090?▾
Cloud rental prices for both the A100 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 A100 have compared to the RTX 5090?▾
The A100 has 40 to 80 GB of HBM2e memory. The RTX 5090 has 32 GB of GDDR7 memory.
Can I find A100 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 A100 and the RTX 5090?▾
The A100 uses the Ampere architecture (2020) while the RTX 5090 uses Blackwell (2025). The A100 delivers 1.5x the dense FP16 throughput (312 vs 209.5 TFLOPS, both without sparsity) and 1.1x the memory bandwidth of the RTX 5090.
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 A100 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 A100Every 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.