Specifications Compared
| Spec | A100 | RTX A4000 |
|---|---|---|
| TDP | 400W | 140W |
| VRAM | 40-80 GB | 16-20 GB |
| CUDA Cores | 6,912 | 6,144 |
| Memory Type | HBM2e | GDDR6 |
| Architecture | Ampere | Ampere |
| FP16 (dense) | 312 TFLOPS | Not published |
| Form Factors | SXM4, PCIe | PCIe |
| INT8 (dense) | 624 TOPS | Not published |
| Interconnect | NVLink, PCIe 4.0, InfiniBand | PCIe 4.0 |
| Tensor Cores | 432 | 192 |
| FP32 Performance | 19.5 TFLOPS | 19.2 TFLOPS |
| FP64 Performance | 9.7 TFLOPS | Not published |
| Memory Bandwidth | 2,039 GB/s | 448 GB/s |
| FP16 (with sparsity) | 624 TFLOPS | 153.4 TFLOPS |
| INT8 (with sparsity) | 1,248 TOPS | Not published |
Performance Analysis
The FP32 throughput of the A100 at 19.5 TFLOPS exceeds that of the RTX A4000 at 19.2 TFLOPS by a small margin. This similarity in FP32 performance suggests comparable results for certain scientific computing applications that rely on single precision calculations. Memory bandwidth differences impact batch sizes significantly because the A100 delivers 2039 GB/s compared to 448 GB/s on the RTX A4000. For FP16 operations the A100 provides 312 TFLOPS in dense mode which allows for efficient training workloads while the RTX A4000 lists 153.4 TFLOPS only in sparsity mode. The higher TDP of 400W on the A100 versus 140W on the RTX A4000 indicates greater power demands for the former in sustained operations.
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 | Slovenia, SI | 1 | $0.73 | — | Deploy |
| ThunderCompute | USA | 2 | $1.09 | $2.18 | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.35 | — | Deploy |
| Massed Compute | us-central-3 | 8 | $1.38 | $11.04 | Deploy |
11 providers in stock, 34 offers (cheapest per provider shown). All A100 offers, price history and alerts
RTX A4000
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| Paperspace | ny2 | 2 | $0.76 | $1.52 | Deploy |
1 provider in stock, 6 offers (cheapest per provider shown). All RTX A4000 offers, price history and alerts
Notify me when A100 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
The A100 serves as the better choice for large model training that requires 40 to 80 GB of HBM2e memory and 2039 GB/s bandwidth. Its support for NVLink and higher dense FP16 performance at 312 TFLOPS enables handling of bigger batches in distributed setups.
When to Choose the RTX A4000
The RTX A4000 fits scenarios with lower power budgets at 140W TDP and smaller memory needs of 16 to 20 GB. Its PCIe only design suits single GPU inference tasks where 19.2 TFLOPS FP32 performance meets requirements without excessive energy consumption.
Use Cases
The A100 provides 40 to 80 GB VRAM and 312 TFLOPS dense FP16 which support larger models than the 16 to 20 GB on the RTX A4000.
The A100 delivers 624 TOPS dense INT8 along with 2039 GB/s bandwidth for higher throughput on large batches compared to the RTX A4000.
The A100 offers 624 TFLOPS FP16 with sparsity and NVLink interconnect that enable efficient updates on models exceeding 20 GB.
The RTX A4000 at 140W TDP and 19.2 TFLOPS FP32 handles typical image generation workloads within its 16 to 20 GB GDDR6 memory.
Both GPUs deliver nearly identical FP32 performance at 19.5 TFLOPS and 19.2 TFLOPS for precision sensitive calculations.
Frequently Asked Questions
What is the FP32 performance of the A100 versus the RTX A4000?▾
The A100 achieves 19.5 TFLOPS in FP32 and the RTX A4000 reaches 19.2 TFLOPS in FP32. These figures indicate similar single precision capabilities.
Does the A100 support higher memory bandwidth than the RTX A4000?▾
Yes the A100 provides 2039 GB/s bandwidth compared to 448 GB/s on the RTX A4000. Higher bandwidth supports larger batch sizes during training.
What power consumption do the A100 and RTX A4000 require?▾
The A100 has a TDP of 400W while the RTX A4000 has a TDP of 140W. The lower power draw of the RTX A4000 suits energy constrained environments.
Which GPU offers NVLink connectivity?▾
The A100 includes NVLink interconnect in addition to PCIe 4.0. The RTX A4000 supports only PCIe 4.0 without NVLink.
Which is cheaper to rent, the A100 or the RTX A4000?▾
Cloud rental prices for both the A100 and RTX A4000 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 A4000?▾
The A100 has 40 to 80 GB of HBM2e memory. The RTX A4000 has 16 to 20 GB of GDDR6 memory.
Can I find A100 and RTX A4000 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 A4000?▾
The A100 uses the Ampere architecture (2020) while the RTX A4000 uses Ampere (2021). The A100 has 40-80 GB of HBM2e at 2,039 GB/s; the RTX A4000 has 16-20 GB of GDDR6 at 448 GB/s, so the A100 has 4.6x the memory bandwidth of the RTX A4000.
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 A4000. 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 A4000Every 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.