Specifications Compared
| Spec | RTX 3090 | RTX A4000 |
|---|---|---|
| TDP | 350W | 140W |
| VRAM | 24 GB | 16-20 GB |
| CUDA Cores | 10,496 | 6,144 |
| Memory Type | GDDR6X | GDDR6 |
| Architecture | Ampere | Ampere |
| FP16 (dense) | 71 TFLOPS | Not published |
| Form Factors | PCIe | PCIe |
| INT8 (dense) | 284 TOPS | Not published |
| Interconnect | NVLink, PCIe 4.0 | PCIe 4.0 |
| Tensor Cores | 328 | 192 |
| FP32 Performance | 35.6 TFLOPS | 19.2 TFLOPS |
| Memory Bandwidth | 936 GB/s | 448 GB/s |
| FP16 (with sparsity) | 142 TFLOPS | 153.4 TFLOPS |
| INT8 (with sparsity) | 568 TOPS | Not published |
Performance Analysis
The RTX 3090 delivers 35.6 TFLOPS FP32 while the RTX A4000 delivers 19.2 TFLOPS FP32. The RTX 3090 also supplies 71 TFLOPS FP16 dense and 142 TFLOPS FP16 with sparsity. The RTX A4000 supplies 153.4 TFLOPS FP16 with sparsity. The higher memory bandwidth of 936 GB/s on the RTX 3090 versus 448 GB/s on the RTX A4000 permits larger batch sizes during training or inference steps that move substantial tensor data. The FP16 with sparsity advantage of the RTX A4000 over the RTX 3090 remains modest at 153.4 TFLOPS versus 142 TFLOPS while the RTX 3090 alone provides published dense FP16 and INT8 figures.
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.
RTX 3090
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| LeaderGPU | The Netherlands | 8 | $0.29 | $2.29 | Deploy |
| Vast.ai | Czechia, CZ | 2 | $0.32 | $0.65 | Deploy |
2 providers in stock, 9 offers (cheapest per provider shown). All RTX 3090 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 RTX 3090 drops below a price
One email when the cheapest in-stock on-demand price per GPU-hour falls below your threshold. Cheapest right now: $0.29/GPU-hr.
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When to Choose the RTX 3090
The RTX 3090 suits workloads that require the full 24 GB VRAM capacity and 936 GB/s bandwidth. Training or inference jobs that exceed 20 GB per GPU benefit from this configuration over the RTX A4000 range of 16 to 20 GB. The 35.6 TFLOPS FP32 rating further supports precision sensitive scientific computing tasks.
When to Choose the RTX A4000
The RTX A4000 suits power constrained environments that operate within a 140W TDP envelope. Inference workloads that rely on 153.4 TFLOPS FP16 with sparsity can run on the RTX A4000 while staying under the power limit of the RTX 3090 at 350W.
Use Cases
The 24 GB VRAM and 936 GB/s bandwidth on the RTX 3090 exceed the RTX A4000 limits and support larger models.
The 71 TFLOPS FP16 dense rating on the RTX 3090 enables dense tensor operations unavailable on the RTX A4000.
The 24 GB VRAM capacity on the RTX 3090 accommodates fine tuning runs that approach or exceed 20 GB.
Both cards handle diffusion workloads yet the RTX 3090 bandwidth of 936 GB/s permits larger batches than the 448 GB/s on the RTX A4000.
The 35.6 TFLOPS FP32 rating on the RTX 3090 surpasses the 19.2 TFLOPS FP32 rating on the RTX A4000.
Frequently Asked Questions
What is the memory bandwidth difference between these two Ampere GPUs?▾
The RTX 3090 reaches 936 GB/s. The RTX A4000 reaches 448 GB/s.
Which card offers higher FP32 performance?▾
The RTX 3090 reaches 35.6 TFLOPS FP32. The RTX A4000 reaches 19.2 TFLOPS FP32.
Can the RTX A4000 exceed the sparse FP16 performance of the RTX 3090?▾
The RTX A4000 reaches 153.4 TFLOPS FP16 with sparsity. The RTX 3090 reaches 142 TFLOPS FP16 with sparsity.
How do the power requirements compare?▾
The RTX 3090 carries a 350W TDP. The RTX A4000 carries a 140W TDP.
Does the RTX 3090 publish dense INT8 performance?▾
The RTX 3090 lists 284 TOPS INT8 dense and 568 TOPS INT8 with sparsity. The RTX A4000 does not publish INT8 figures.
Which is cheaper to rent, the RTX 3090 or the RTX A4000?▾
Cloud rental prices for both the RTX 3090 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 RTX 3090 have compared to the RTX A4000?▾
The RTX 3090 has 24 GB of GDDR6X memory. The RTX A4000 has 16 to 20 GB of GDDR6 memory.
Can I find RTX 3090 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 RTX 3090 and the RTX A4000?▾
The RTX 3090 uses the Ampere architecture (2020) while the RTX A4000 uses Ampere (2021). The RTX 3090 has 24 GB of GDDR6X at 936 GB/s; the RTX A4000 has 16-20 GB of GDDR6 at 448 GB/s, so the RTX 3090 has 2.1x 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 RTX 3090 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 RTX 3090Every 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.