Specifications Compared
| Spec | A100 SXM4 80GB | RTX 3090 |
|---|---|---|
| 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 312 TFLOPS dense FP16 and 19.5 TFLOPS FP32 while the RTX 3090 delivers 35.6 TFLOPS FP16 and 35.6 TFLOPS FP32. The 312 TFLOPS dense FP16 figure on the A100 exceeds the 35.6 TFLOPS FP16 figure on the RTX 3090 by a factor of eight and supports larger batch sizes during training and inference. Memory bandwidth of 2039 GB/s on the A100 versus 936 GB/s on the RTX 3090 further enables the A100 to sustain higher throughput on memory intensive workloads. The A100 also lists 624 TFLOPS FP16 with sparsity compared to the RTX 3090 figure that does not specify sparsity.
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 |
|---|---|---|---|---|---|
| Vast.ai | Slovenia, SI | 1 | $0.67 | — | Deploy |
| LeaderGPU | The Netherlands | 8 | $0.68 | $5.42 | Deploy |
| ThunderCompute | USA | 2 | $1.09 | $2.18 | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.35 | — | Deploy |
| Massed Compute | us-central-3 | 2 | $1.35 | $2.70 | Deploy |
11 providers in stock, 44 offers (cheapest per provider shown). All A100 SXM4 80GB offers, price history and alerts
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When to Choose the A100 SXM4 80GB
The A100 SXM4 80GB suits workloads that require 80 GB HBM2e memory and 2039 GB/s bandwidth such as training models that exceed 24 GB capacity. Its 312 TFLOPS dense FP16 performance and SXM4 interconnect options provide advantages in multi GPU scaling scenarios that the RTX 3090 PCIe variant cannot match.
When to Choose the RTX 3090
The RTX 3090 suits FP32 centric tasks where its 35.6 TFLOPS FP32 performance matches or exceeds the 19.5 TFLOPS FP32 of the A100 SXM4 80GB. Its 350W TDP and PCIe form factor also fit single node consumer or workstation deployments that do not need 80 GB memory.
Use Cases
The A100 SXM4 80GB supplies 80 GB HBM2e memory and 312 TFLOPS dense FP16 performance that exceed the 24 GB and 35.6 TFLOPS of the RTX 3090.
The A100 SXM4 80GB provides 624 TFLOPS FP16 with sparsity and 2039 GB/s bandwidth that support larger batch inference compared to the RTX 3090.
The A100 SXM4 80GB offers 80 GB memory capacity and 312 TFLOPS dense FP16 that accommodate fine tuning of models larger than 24 GB.
The RTX 3090 delivers 35.6 TFLOPS FP32 performance at 350W TDP that matches requirements for many diffusion workloads without needing 80 GB memory.
The A100 SXM4 80GB provides higher memory bandwidth while the RTX 3090 provides equal FP32 throughput at lower TDP so selection depends on exact workload size.
Frequently Asked Questions
What is the FP16 performance difference between these two GPUs?▾
The A100 SXM4 80GB lists 312 TFLOPS dense FP16 and 624 TFLOPS FP16 with sparsity while the RTX 3090 lists 35.6 TFLOPS FP16 without a sparsity specification.
Which GPU has higher memory bandwidth?▾
The A100 SXM4 80GB provides 2039 GB/s memory bandwidth while the RTX 3090 provides 936 GB/s memory bandwidth.
What form factors do the A100 SXM4 80GB and RTX 3090 use?▾
The A100 SXM4 80GB uses an SXM4 form factor while the RTX 3090 uses a PCIe form factor.
What are the TDP values for each GPU?▾
The A100 SXM4 80GB has a TDP of 400W while the RTX 3090 has a TDP of 350W.
Do both GPUs support NVLink?▾
The A100 SXM4 80GB supports NVLink along with PCIe 4.0 and InfiniBand while the RTX 3090 supports NVLink on its PCIe form factor.
Which is cheaper to rent, the A100 SXM4 80GB or the RTX 3090?▾
Cloud rental prices for both the A100 SXM4 80GB 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 SXM4 80GB have compared to the RTX 3090?▾
The A100 SXM4 80GB has 80 GB of HBM2e memory. The RTX 3090 has 24 GB of GDDR6X memory.
Can I find A100 SXM4 80GB 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 SXM4 80GB and the RTX 3090?▾
The A100 SXM4 80GB uses the Ampere architecture (2020) while the RTX 3090 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.
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. 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.