Specifications Compared
| Spec | A100 SXM4 80GB | RTX 3090 Ti |
|---|---|---|
| TDP | 400W | 350W |
| VRAM | 80 GB | 24 GB |
| CUDA Cores | 6,912 | 10,496 |
| Memory Type | HBM2e | GDDR6X |
| Architecture | Ampere | Ampere |
| FP16 (dense) | 312 TFLOPS | Not published |
| Form Factors | SXM4 | PCIe |
| INT8 (dense) | 624 TOPS | Not published |
| Interconnect | NVLink, PCIe 4.0, InfiniBand | NVLink |
| 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 | Not published |
| INT8 (with sparsity) | 1,248 TOPS | Not published |
| FP16 (vendor figure, sparsity not specified) | Not published | 35.6 TFLOPS |
Performance Analysis
The A100 SXM4 80GB delivers FP16 dense performance of 312 TFLOPS while the RTX 3090 Ti delivers FP16 performance of 35.6 TFLOPS with sparsity unspecified. This gap means the A100 SXM4 80GB processes matrix operations at a higher rate during training and inference workloads that rely on dense FP16 calculations. The A100 SXM4 80GB also provides FP16 with sparsity at 624 TFLOPS compared to the RTX 3090 Ti figure. Memory bandwidth of 2039 GB/s on the A100 family supports larger batch sizes than the 936 GB/s bandwidth on the RTX 3090 family during data intensive operations. FP32 performance measures 19.5 TFLOPS on the A100 side against 35.6 TFLOPS on the RTX 3090 Ti side.
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 SXM4 80GB
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| LeaderGPU | The Netherlands | 8 | $0.68 | $5.42 | Deploy |
| Vast.ai | Czechia, CZ | 1 | $0.73 | — | Deploy |
| ThunderCompute | USA | 1 | $1.09 | — | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.35 | — | Deploy |
| Massed Compute | us-central-3 | 1 | $1.38 | — | Deploy |
11 providers in stock, 39 offers (cheapest per provider shown). All A100 SXM4 80GB offers, price history and alerts
RTX 3090 Ti
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| Vast.ai | Finland, FI | 4 | $0.27 | $1.07 | Deploy |
| LeaderGPU | The Netherlands | 8 | $0.29 | $2.29 | Deploy |
2 providers in stock, 9 offers (cheapest per provider shown). All RTX 3090 Ti offers, price history and alerts
Notify me when A100 SXM4 80GB drops below a price
One email when the cheapest in-stock on-demand price per GPU-hour falls below your threshold. Cheapest right now: $0.68/GPU-hr.
QuantaCloud
Comparing A100 providers? We broker across all of them.
Need 16+ A100s reserved for fine-tuning, simulation, or production inference? We quote volume pricing across multiple data center partners: one quote at partner rates, 24h turnaround.
When to Choose the A100 SXM4 80GB
The A100 SXM4 80GB suits workloads that require the 80 GB HBM2e capacity and 2039 GB/s bandwidth for large model handling. Its SXM4 form factor and support for InfiniBand enable configurations where the 400W TDP is acceptable in dense server environments.
When to Choose the RTX 3090 Ti
The RTX 3090 Ti suits workloads that fit within the 24 GB GDDR6X capacity and benefit from the 35.6 TFLOPS FP32 performance at the 350W TDP. Its PCIe form factor aligns with standard consumer or workstation setups that do not require the higher interconnect options of the A100 SXM4 80GB.
Use Cases
The 80 GB HBM2e capacity and 312 TFLOPS FP16 dense performance support larger models than the 24 GB and 35.6 TFLOPS on the RTX 3090 Ti.
The 2039 GB/s bandwidth and 624 TFLOPS FP16 with sparsity enable higher throughput for large batches compared to the RTX 3090 Ti specifications.
The 80 GB memory allows full parameter updates on models that exceed the 24 GB limit of the RTX 3090 Ti.
The 35.6 TFLOPS FP32 performance and 350W TDP fit consumer scale image generation tasks within the 24 GB capacity.
FP32 workloads at 19.5 TFLOPS on the A100 or 35.6 TFLOPS on the RTX 3090 Ti can match depending on exact memory needs.
Frequently Asked Questions
What are the FP16 performance numbers?▾
The A100 family reports 312 TFLOPS FP16 dense and 624 TFLOPS FP16 with sparsity. The RTX 3090 family reports 35.6 TFLOPS FP16.
Which GPU has higher memory bandwidth?▾
The A100 family provides 2039 GB/s while the RTX 3090 family provides 936 GB/s.
What TDP values apply to these variants?▾
The A100 family lists 400W TDP and the RTX 3090 family lists 350W TDP.
Do both GPUs support NVLink?▾
The A100 SXM4 80GB supports NVLink along with PCIe 4.0 and InfiniBand. The RTX 3090 Ti supports NVLink.
Which form factors are used?▾
The A100 SXM4 80GB uses the SXM4 form factor. The RTX 3090 Ti uses the PCIe form factor.
Which is cheaper to rent, the A100 SXM4 80GB or the RTX 3090 Ti?▾
Cloud rental prices for both the A100 SXM4 80GB and RTX 3090 Ti 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 SXM4 80GB have compared to the RTX 3090 Ti?▾
The A100 SXM4 80GB has 80 GB of HBM2e memory. The RTX 3090 Ti has 24 GB of GDDR6X memory.
Can I find A100 SXM4 80GB and RTX 3090 Ti 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 SXM4 80GB and the RTX 3090 Ti?▾
The A100 SXM4 80GB uses the Ampere architecture (2020) while the RTX 3090 Ti uses Ampere (2020). The A100 SXM4 80GB delivers 4.4x the dense FP16 throughput (312 vs 71 TFLOPS, both without sparsity) and 2.2x the memory bandwidth of the RTX 3090 Ti.
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 SXM4 80GB and the RTX 3090 Ti. 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.