Blackwell
NVIDIA B300 192GB
wins
4
The NVIDIA B300 is the next step in the Blackwell lineup.
Ada Lovelace
NVIDIA RTX 4080
wins
1
The RTX 4080 offers 16GB GDDR6X and Ada Lovelace efficiency at a lower price than the RTX 4090.
Performance comparison
Visual bars — winner highlighted
NVIDIA B300 192GB
Metric
NVIDIA RTX 4080
FP16 TFLOPS
Bandwidth
VRAM
TDP (lower=better)
TFLOPS/watt
GB/s per watt
Full specification table
| Spec | NVIDIA B300 192GB | NVIDIA RTX 4080 |
|---|---|---|
| Architecture | Blackwell | Ada Lovelace |
| VRAM | 192 GB HBM3e | 16 GB GDDR6X |
| VRAM type | HBM3e | GDDR6X |
| Memory bandwidth | 8,000 GB/s | 717 GB/s |
| FP16 TFLOPS | 5,000 TFLOPS | 97 TFLOPS |
| TDP | 1,000 W | 320 W |
| TFLOPS/watt | 5.00 T/W | 0.30 T/W |
| GB/s per watt | 8.00 GB/s/W | 2.24 GB/s/W |
| NVLink | Yes | No |
| Release year | 2025 | 2022 |
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 B300 192GB
NVIDIA RTX 4080
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 B300 192GB for:
- Next-gen LLM training
- Agent inference at scale
- Memory-intensive AI
Weaknesses / Limitations
- Very limited availability — not yet widely deployed on cloud platforms
- 1,000W TDP requires specialized power and cooling
- Premium pricing over B200 with incremental gains
Choose NVIDIA RTX 4080 for:
- Budget fine-tuning
- Small model inference
- Consumer AI
Weaknesses / Limitations
- 16 GB VRAM limits model size — cannot run 34B+ models
- No NVLink — cannot pool VRAM
- Consumer GPU — no ECC memory
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