Specifications Compared
| Spec | RTX 3090 | RTX 4080 SUPER |
|---|---|---|
| TDP | 350W | 320W |
| VRAM | 24 GB | 16 GB |
| CUDA Cores | 10,496 | 9,728 |
| Memory Type | GDDR6X | GDDR6X |
| Architecture | Ampere | Ada Lovelace |
| Form Factors | PCIe | PCIe |
| Interconnect | NVLink | Not published |
| Tensor Cores | 328 | 304 |
| FP32 Performance | 35.6 TFLOPS | 48.7 TFLOPS |
| Memory Bandwidth | 936 GB/s | 717 GB/s |
| FP16 (vendor figure, sparsity not specified) | 35.6 TFLOPS | 48.7 TFLOPS |
| INT8 (vendor figure, sparsity not specified) | Not published | 780 TOPS |
Performance Analysis
The RTX 3090 delivers 35.6 TFLOPS dense FP16 and 35.6 TFLOPS dense FP32 while the RTX 4080 SUPER delivers 48.7 TFLOPS dense FP16 and 48.7 TFLOPS dense FP32. This dense FP16 advantage of 48.7 TFLOPS on the RTX 4080 SUPER supports faster matrix operations in both training and inference workloads when batch sizes fit within 16 GB. Memory bandwidth of 936 GB per second on the RTX 3090 versus 717 GB per second on the RTX 4080 SUPER allows larger effective batch sizes in memory intensive tasks despite the lower dense tensor throughput of 35.6 TFLOPS. The shared family TDP of 350 W on the RTX 3090 exceeds the 320 W figure on the RTX 4080 SUPER yet the higher dense FP32 throughput of 48.7 TFLOPS on the RTX 4080 SUPER improves throughput per watt in compatible workloads.
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 | 4 | $0.37 | $1.48 | Deploy |
| RunPod | global | 1 | $0.50 | — | Deploy |
3 providers in stock, 10 offers (cheapest per provider shown). All RTX 3090 offers, price history and alerts
RTX 4080 SUPER
RTX 4080 SUPER is not offered on-demand by any provider we track right now. See the RTX 4080 SUPER rental page for last-seen listed prices and a price alert.
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 variant suits workloads that require the full 24 GB GDDR6X capacity such as training large language models that exceed 16 GB. Its NVLink interconnect further enables multi GPU scaling in scientific computing scenarios where memory pooling across cards is necessary.
When to Choose the RTX 4080 SUPER
Its lower shared family TDP of 320 W reduces power draw compared with the 350 W figure on the RTX 3090 for sustained single card operation.
Use Cases
The RTX 3090 provides 24 GB GDDR6X which accommodates larger models than the 16 GB on the RTX 4080 SUPER.
The RTX 4080 SUPER achieves 48.7 TFLOPS dense FP16 compared with 35.6 TFLOPS dense FP16 on the RTX 3090.
The RTX 4080 SUPER offers higher dense FP16 throughput of 48.7 TFLOPS within its 16 GB capacity for typical fine tuning batches.
The RTX 3090 supplies 24 GB GDDR6X and 936 GB per second bandwidth which supports higher resolution generation than 16 GB allows.
The RTX 3090 includes NVLink interconnect absent on the RTX 4080 SUPER for multi GPU memory sharing.
Frequently Asked Questions
What are the FP32 figures for these GPUs?▾
Both GPUs report dense FP32 throughput with the RTX 3090 at 35.6 TFLOPS and the RTX 4080 SUPER at 48.7 TFLOPS.
Which GPU has higher memory bandwidth?▾
The RTX 3090 family bandwidth reaches 936 GB per second while the RTX 4080 SUPER family bandwidth reaches 717 GB per second.
Do these GPUs support NVLink?▾
The RTX 3090 variant includes NVLink interconnect while the RTX 4080 SUPER lists no interconnect.
What TDP values apply to each card?▾
The RTX 3090 uses a shared family TDP of 350 W and the RTX 4080 SUPER uses a shared family TDP of 320 W.
Which is cheaper to rent, the RTX 3090 or the RTX 4080 SUPER?▾
Cloud rental prices for both the RTX 3090 and RTX 4080 SUPER 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 4080 SUPER?▾
The RTX 3090 has 24 GB of GDDR6X memory. The RTX 4080 SUPER has 16 GB of GDDR6X memory.
Can I find RTX 3090 and RTX 4080 SUPER 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 4080 SUPER?▾
The RTX 3090 uses the Ampere architecture (2020) while the RTX 4080 SUPER uses Ada Lovelace (2022). The RTX 4080 SUPER delivers 1.4x the dense FP16 throughput (97.5 vs 71 TFLOPS, both without sparsity) while the RTX 3090 has 1.3x the memory bandwidth of the RTX 4080 SUPER.
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 4080 SUPER. 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 4080Every 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.