Ampere
NVIDIA RTX 3090
wins
4
The RTX 3090 remains a popular budget option for AI workloads with 24GB GDDR6X.
Ampere
NVIDIA RTX 3080 10GB
wins
1
The RTX 3080 is an entry-level option for AI workloads with 10GB GDDR6X.
Performance comparison
Visual bars — winner highlighted
NVIDIA RTX 3090
Metric
NVIDIA RTX 3080 10GB
FP16 TFLOPS
Bandwidth
VRAM
TDP (lower=better)
TFLOPS/watt
GB/s per watt
Full specification table
| Spec | NVIDIA RTX 3090 | NVIDIA RTX 3080 10GB |
|---|---|---|
| Architecture | Ampere | Ampere |
| VRAM | 24 GB GDDR6X | 10 GB GDDR6X |
| VRAM type | GDDR6X | GDDR6X |
| Memory bandwidth | 936 GB/s | 760 GB/s |
| FP16 TFLOPS | 71 TFLOPS | 45 TFLOPS |
| TDP | 350 W | 320 W |
| TFLOPS/watt | 0.20 T/W | 0.14 T/W |
| GB/s per watt | 2.67 GB/s/W | 2.38 GB/s/W |
| NVLink | No | No |
| Release year | 2020 | 2020 |
Live cloud pricing
On-demand $/hr across providers — updated in real time
Power efficiency analysis
TFLOPS/watt and GB/s/watt — critical for data center TCO
NVIDIA RTX 3090
NVIDIA RTX 3080 10GB
TFLOPS/watt measures compute efficiency — how much AI throughput you get per watt of power consumed. For data centers with PUE of 1.2–1.5, a 10% improvement in TFLOPS/watt translates directly to lower electricity costs and cooling requirements. GB/s/watt measures memory bandwidth efficiency, which is the binding constraint for memory-bound LLM inference workloads.
When to choose each GPU
Choose NVIDIA RTX 3090 for:
- Budget fine-tuning
- Small model inference
- Hobbyist AI
Choose NVIDIA RTX 3080 10GB for:
- Entry-level AI
- Small model inference
- Hobbyist compute
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