Specifications Compared
| Spec | RTX-3080 | RTX-3090 |
|---|---|---|
| TDP | 320W | 350W |
| VRAM | 10-12 GB | 24 GB |
| CUDA Cores | 8,704 | 10,496 |
| Memory Type | GDDR6X | GDDR6X |
| Architecture | Ampere | Ampere |
| Form Factors | PCIe | PCIe |
| Interconnect | NVLink | |
| Tensor Cores | 272 | 328 |
| FP16 Performance | 29.8 TFLOPS | 35.6 TFLOPS |
| FP32 Performance | 29.8 TFLOPS | 35.6 TFLOPS |
| Memory Bandwidth | 760 GB/s | 936 GB/s |
Performance Analysis
Compute performance between the RTX 3080 Ti and RTX 3090 remains close: 34.1 TFLOPS FP16 and FP32 on the 3080 Ti versus 35.6 TFLOPS on the 3090, a 4 percent gap that translates to marginally faster training and inference iterations on the 3090 for compute-bound tasks. The real divergence lies in memory: 12 GB VRAM on the 3080 Ti restricts batch sizes and model complexity compared to 24 GB on the 3090, which handles larger datasets without offloading to system RAM, reducing latency in LLM training by enabling bigger effective batch sizes. Memory bandwidth at 912 GB/s for the 3080 Ti and 936 GB/s for the 3090 supports high-throughput operations, but the 3090's edge sustains peak performance longer in memory-intensive inference scenarios like Stable Diffusion generation.
Live Cloud Pricing
Real-time prices from 25+ providers. Updated every 60 seconds.
RTX 3090
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
 TensorDock | NVIDIA GeForce RTX 3090 24GB VRAM | 24GB | 0 vCPU 0GB RAM | Wilmington, Delaware | $0.20/GPU/hr | Available | ||
TensorDock | NVIDIA GeForce RTX 3090 24GB VRAM | 24GB | 0 vCPU 0GB RAM | Dallas, Texas | $0.21/GPU/hr | Available | ||
 Vast.ai | 4×NVIDIA GeForce RTX 3090 24GB VRAM | 24GB | 32 vCPU 403GB RAM 153GB Storage | Iceland | $0.25/GPU/hr $1.01/hr total (4×) | Available | ||
Vast.ai | 4×NVIDIA GeForce RTX 3090 24GB VRAM | 24GB | 32 vCPU 252GB RAM 1440GB Storage | Finland | $0.27/GPU/hr $1.07/hr total (4×) | Available | ||
 LeaderGPU | 8×NVIDIA GeForce RTX 3090 24GB VRAM | 24GB | 64 vCPU 384GB RAM 2000GB Storage | Netherlands | $0.29/GPU/hr $2.29/hr total (8×) | Available |
When to Choose the RTX 3080 Ti
The RTX 3080 Ti suits budget-conscious users targeting workloads fitting within 12 GB VRAM, such as fine-tuning smaller language models or Stable Diffusion at standard resolutions. Its average cloud price of $0.14/hr across 4 offers undercuts the RTX 3090's $0.44/hr average, delivering 34.1 TFLOPS FP32 performance at lower cost for inference-heavy tasks where double VRAM offers no benefit.
When to Choose the RTX 3090
Opt for the RTX 3090 when VRAM demands exceed 12 GB, as in training large LLMs or scientific computing with extensive datasets that leverage its 24 GB capacity. NVLink interconnect enables efficient multi-GPU scaling unavailable on the 3080 Ti, while 936 GB/s bandwidth and 35.6 TFLOPS sustain high batch sizes despite the higher average $0.44/hr pricing across 44 offers.
Use Cases
The RTX 3090's 24 GB VRAM supports larger models and batch sizes critical for efficient LLM training, unlike the 3080 Ti's 12 GB limit. Its NVLink enables multi-GPU setups for scaled training.
24 GB VRAM on the RTX 3090 handles bigger inference batches and longer contexts than the 3080 Ti's 12 GB. The 936 GB/s bandwidth maintains throughput for production deployments.
Fine-tuning mid-sized models fits within 12 GB of the RTX 3080 Ti, matching the 3090's 34.1 TFLOPS versus 35.6 TFLOPS closely. Choose based on cost: $0.14/hr average for 3080 Ti versus $0.44/hr for 3090.
12 GB VRAM and 912 GB/s bandwidth on the RTX 3080 Ti suffice for standard Stable Diffusion generations at 34.1 TFLOPS. Lower $0.14/hr pricing makes it ideal over the pricier 3090.
Scientific simulations benefit from the RTX 3090's 24 GB VRAM for large datasets and NVLink for multi-GPU parallelism. 936 GB/s bandwidth edges out the 3080 Ti's 912 GB/s in memory-bound tasks.
Frequently Asked Questions
Which has more VRAM: RTX 3080 Ti or RTX 3090?▾
The RTX 3090 provides 24 GB GDDR6X VRAM, double the RTX 3080 Ti's 12 GB GDDR6X. This difference impacts handling of large AI models. Cloud pricing starts at $0.08/hr for both.
Is the RTX 3090 faster than the RTX 3080 Ti?▾
The RTX 3090 delivers 35.6 TFLOPS FP32, slightly above the RTX 3080 Ti's 34.1 TFLOPS, a 4 percent gain in compute tasks. Memory bandwidth is 936 GB/s versus 912 GB/s. Both share 350W TDP.
What is the cloud pricing comparison?▾
RTX 3080 Ti pricing starts at $0.08/hr with $0.14/hr average across 4 offers; RTX 3090 starts at $0.08/hr but averages $0.44/hr across 44 offers. The 3080 Ti offers better value for VRAM-limited workloads.
Does RTX 3080 Ti support NVLink?▾
The RTX 3080 Ti uses PCIe without NVLink support, unlike the RTX 3090 which includes NVLink for multi-GPU communication. This limits 3080 Ti scaling in distributed training. Both are Ampere 2020 architecture.
RTX 3080 Ti vs 3090 for AI training?▾
RTX 3090 excels with 24 GB VRAM for larger batches in AI training, versus 12 GB on 3080 Ti. Compute is close at 35.6 TFLOPS versus 34.1 TFLOPS. Choose 3090 for memory-intensive models.
Power consumption difference?▾
Both GPUs draw 350W TDP, making them equivalent in power needs for cloud instances. RTX 3090's higher 936 GB/s bandwidth utilizes this efficiently. PCIe form factor is standard for both.
Which is cheaper to rent, the RTX 3080 or the RTX 3090?▾
Cloud rental prices for both the RTX 3080 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 RTX 3080 have compared to the RTX 3090?▾
The RTX 3080 has 10 to 12 GB of GDDR6X memory. The RTX 3090 has 24 GB of GDDR6X memory.
Can I find RTX 3080 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 RTX 3080 and the RTX 3090?▾
The RTX 3080 uses the Ampere architecture (2020) while the RTX 3090 uses Ampere (2020). The RTX 3090 delivers 1.2x the FP16 throughput and 1.2x the memory bandwidth of the RTX 3080.