Blackwell
NVIDIA RTX 5090 32GB
wins
3
The RTX 5090 is NVIDIA's Blackwell consumer flagship with 32 GB GDDR7 and 838 TFLOPS FP16.
Ampere
NVIDIA RTX A6000
wins
2
The RTX A6000 is NVIDIA's Ampere professional workstation GPU with 48GB GDDR6 and NVLink support.
Performance comparison
Visual bars — winner highlighted
NVIDIA RTX 5090 32GB
Metric
NVIDIA RTX A6000
FP16 TFLOPS
Bandwidth
VRAM
TDP (lower=better)
TFLOPS/watt
GB/s per watt
Full specification table
| Spec | NVIDIA RTX 5090 32GB | NVIDIA RTX A6000 |
|---|---|---|
| Architecture | Blackwell | Ampere |
| VRAM | 32 GB GDDR7 | 48 GB GDDR6 |
| VRAM type | GDDR7 | GDDR6 |
| Memory bandwidth | 1,792 GB/s | 768 GB/s |
| FP16 TFLOPS | 838 TFLOPS | 154 TFLOPS |
| TDP | 575 W | 300 W |
| TFLOPS/watt | 1.46 T/W | 0.51 T/W |
| GB/s per watt | 3.12 GB/s/W | 2.56 GB/s/W |
| NVLink | No | Yes |
| Release year | 2025 | 2020 |
Live cloud pricing
On-demand pricing across providers — updated in real time
Power efficiency analysis
TFLOPS/watt and GB/s/watt — critical for data center TCO
NVIDIA RTX 5090 32GB
NVIDIA RTX A6000
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 5090 32GB for:
- Consumer AI inference
- Fine-tuning 13B–30B models
- Cost-effective Blackwell
Weaknesses / Limitations
- 32 GB VRAM — cannot run 70B+ models unquantized
- No NVLink — cannot pool VRAM across cards
- 575W TDP — high power draw for a consumer card
Choose NVIDIA RTX A6000 for:
- Professional workstation AI
- Large model inference
- Rendering
Weaknesses / Limitations
- Older Ampere architecture — lower TFLOPS than Ada equivalents at same VRAM
- GDDR6 bandwidth (768 GB/s) lower than HBM-based GPUs
- Superseded by RTX 6000 Ada and RTX PRO 6000 on new deployments
Popular GPU comparisons