Specifications Compared
| Spec | A100 PCIe 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 | PCIe | PCIe |
| INT8 (dense) | 624 TOPS | Not published |
| Interconnect | PCIe 4.0, InfiniBand; NVLink only via a bridge between card pairs | 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 PCIe 80GB delivers 312 TFLOPS dense FP16 compared with the 35.6 TFLOPS FP16 of the RTX 3090 Ti while FP32 performance stands at 19.5 TFLOPS for the A100 family and 35.6 TFLOPS for the RTX 3090 family. This dense FP16 advantage allows the A100 PCIe 80GB to complete matrix operations in training workloads at rates over eight times higher than the RTX 3090 Ti when sparsity features remain unused. Memory bandwidth of 2039 GB/s on the A100 family supports larger batch sizes during inference than the 936 GB/s bandwidth on the RTX 3090 family without requiring model partitioning across multiple cards.
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 PCIe 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 | 2 | $1.35 | $2.70 | Deploy |
11 providers in stock, 43 offers (cheapest per provider shown). All A100 PCIe 80GB offers, price history and alerts
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When to Choose the A100 PCIe 80GB
The A100 PCIe 80GB suits workloads that require 80 GB HBM2e capacity and 2039 GB/s bandwidth for models exceeding 24 GB in size. Its 312 TFLOPS dense FP16 rating accelerates large scale training sessions where the 400W TDP remains acceptable within data center power envelopes.
When to Choose the RTX 3090 Ti
The RTX 3090 Ti fits FP32 centric tasks that benefit from its 35.6 TFLOPS FP32 performance and 24 GB GDDR6X memory at a 350W TDP. Its NVLink interconnect supports multi card setups in environments where the A100 PCIe 80GB bridge requirement adds complexity.
Use Cases
The A100 PCIe 80GB provides 80 GB HBM2e and 312 TFLOPS dense FP16 that accommodate models too large for 24 GB GDDR6X.
Higher memory bandwidth of 2039 GB/s on the A100 family enables larger batch sizes than the 936 GB/s on the RTX 3090 family.
The 80 GB capacity on the A100 PCIe 80GB variant handles full precision fine tuning without splitting across cards unlike the 24 GB limit.
The RTX 3090 Ti delivers 35.6 TFLOPS FP32 suitable for consumer graphics workloads at lower TDP.
INT8 dense throughput of 624 TOPS on the A100 family accelerates scientific simulations beyond the RTX 3090 Ti capabilities.
Frequently Asked Questions
What are the FP16 performance numbers?▾
The A100 family lists 312 TFLOPS dense FP16 and the RTX 3090 family lists 35.6 TFLOPS FP16.
Which GPU has higher memory bandwidth?▾
The A100 family reaches 2039 GB/s while the RTX 3090 family reaches 936 GB/s.
Do both GPUs support NVLink?▾
The A100 PCIe 80GB variant requires a bridge for NVLink pairs and the RTX 3090 Ti variant includes NVLink support.
What TDP values apply to these variants?▾
The A100 family TDP is 400W and the RTX 3090 family TDP is 350W.
Which architecture do these GPUs share?▾
Both the A100 PCIe 80GB and RTX 3090 Ti variants use the Ampere architecture released in 2020.
Which is cheaper to rent, the A100 PCIe 80GB or the RTX 3090 Ti?▾
Cloud rental prices for both the A100 PCIe 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 PCIe 80GB have compared to the RTX 3090 Ti?▾
The A100 PCIe 80GB has 80 GB of HBM2e memory. The RTX 3090 Ti has 24 GB of GDDR6X memory.
Can I find A100 PCIe 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 PCIe 80GB and the RTX 3090 Ti?▾
The A100 PCIe 80GB uses the Ampere architecture (2020) while the RTX 3090 Ti uses Ampere (2020). The A100 PCIe 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 PCIe 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.