Specifications Compared
| Spec | A100 | RTX 3090 |
|---|---|---|
| TDP | 400W | 350W |
| VRAM | 40-80 GB | 24 GB |
| CUDA Cores | 6,912 | 10,496 |
| Memory Type | HBM2e | GDDR6X |
| Architecture | Ampere | Ampere |
| FP16 (dense) | 312 TFLOPS | 71 TFLOPS |
| Form Factors | SXM4, PCIe | PCIe |
| INT8 (dense) | 624 TOPS | 284 TOPS |
| Interconnect | NVLink, PCIe 4.0, InfiniBand | NVLink, PCIe 4.0 |
| Tensor Cores | 432 | 328 |
| FP32 Performance | 19.5 TFLOPS | 35.6 TFLOPS |
| FP64 Performance | 9.7 TFLOPS | Not published |
| Memory Bandwidth | 2,039 GB/s | 936 GB/s |
| FP16 (with sparsity) | 624 TFLOPS | 142 TFLOPS |
| INT8 (with sparsity) | 1,248 TOPS | 568 TOPS |
Performance Analysis
The A100 delivers 312 TFLOPS FP16 dense compared with 71 TFLOPS FP16 dense on the RTX 3090. This fourfold ratio in dense FP16 performance favors the A100 for training and inference steps that rely on half precision tensor operations. The RTX 3090 delivers 35.6 TFLOPS FP32 compared with 19.5 TFLOPS FP32 on the A100 so the RTX 3090 holds an advantage in single precision workloads. Memory bandwidth of 2039 GB/s on the A100 versus 936 GB/s on the RTX 3090 allows larger batch sizes during training before memory capacity limits are reached. The A100 also supplies 624 TOPS INT8 dense against 284 TOPS INT8 dense on the RTX 3090 which widens the gap for quantized inference paths.
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 |
|---|---|---|---|---|---|
| LeaderGPU | The Netherlands | 8 | $0.68 | $5.42 | Deploy |
| Vast.ai | Czechia, CZ | 1 | $1.05 | — | Deploy |
| ThunderCompute | USA | 2 | $1.09 | $2.18 | Deploy |
| Massed Compute | us-central-2 | 1 | $1.35 | — | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.35 | — | Deploy |
11 providers in stock, 36 offers (cheapest per provider shown). All A100 offers, price history and alerts
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When to Choose the A100
The A100 suits large scale LLM training because its 40 to 80 GB HBM2e memory and 2039 GB/s bandwidth support bigger batch sizes than the 24 GB and 936 GB/s of the RTX 3090. Its 312 TFLOPS FP16 dense rating exceeds the 71 TFLOPS FP16 dense rating of the RTX 3090 so training iterations complete faster under dense half precision arithmetic.
When to Choose the RTX 3090
The RTX 3090 suits scientific computing workloads that depend on FP32 throughput because its 35.6 TFLOPS FP32 rating exceeds the 19.5 TFLOPS FP32 rating of the A100. Its 350W TDP is lower than the 400W TDP of the A100 and its PCIe form factor fits standard consumer servers without SXM4 requirements.
Use Cases
The A100 supplies 312 TFLOPS FP16 dense against 71 TFLOPS FP16 dense on the RTX 3090 and its 2039 GB/s bandwidth supports larger batches than the 936 GB/s bandwidth of the RTX 3090.
The A100 supplies 312 TFLOPS FP16 dense and 624 TOPS INT8 dense which exceed the 71 TFLOPS FP16 dense and 284 TOPS INT8 dense ratings of the RTX 3090.
The A100 supplies 312 TFLOPS FP16 dense and 40 to 80 GB memory which exceed the 71 TFLOPS FP16 dense and 24 GB memory of the RTX 3090 for sustained fine tuning runs.
The RTX 3090 supplies 35.6 TFLOPS FP32 which exceeds the 19.5 TFLOPS FP32 of the A100 and its 350W TDP fits consumer grade deployments more readily than the 400W TDP of the A100.
The RTX 3090 supplies 35.6 TFLOPS FP32 which exceeds the 19.5 TFLOPS FP32 of the A100 for workloads that rely on single precision arithmetic.
Frequently Asked Questions
How does FP16 dense performance differ between the A100 and RTX 3090?▾
The A100 reaches 312 TFLOPS FP16 dense while the RTX 3090 reaches 71 TFLOPS FP16 dense. This difference determines training speed for half precision models.
What memory bandwidth does each GPU provide?▾
The A100 provides 2039 GB/s bandwidth and the RTX 3090 provides 936 GB/s bandwidth. Higher bandwidth on the A100 supports larger batch sizes before memory stalls occur.
Which GPU offers more FP32 performance?▾
The RTX 3090 reaches 35.6 TFLOPS FP32 while the A100 reaches 19.5 TFLOPS FP32. The RTX 3090 therefore suits single precision scientific workloads better.
What TDP ratings apply to the A100 and RTX 3090?▾
The A100 carries a 400W TDP and the RTX 3090 carries a 350W TDP. The lower TDP on the RTX 3090 reduces power draw in dense consumer installations.
Which is cheaper to rent, the A100 or the RTX 3090?▾
Cloud rental prices for both the A100 and RTX 3090 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 3090?▾
The A100 has 40 to 80 GB of HBM2e memory. The RTX 3090 has 24 GB of GDDR6X memory.
Can I find A100 and RTX 3090 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 3090?▾
The A100 uses the Ampere architecture (2020) while the RTX 3090 uses Ampere (2020). The A100 delivers 4.4x the dense FP16 throughput (312 vs 71 TFLOPS, both without sparsity) and 2.2x the memory bandwidth of the RTX 3090.
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 3090. 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 3090Every 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.