COMPARE / A100 40GB VS A100 80GB
A100 40GB vs A100 80GB
Specs from the chip makers' datasheets; prices from the live Compute Cafe panel, refreshed hourly. Every rate is an on-demand published price with a source receipt.
CHEAPEST A100 40GB
$0.170/hr
SpotGPUs · median $1.19 · 20 providers
CHEAPEST A100 80GB
$0.292/hr
AIC Cloud · median $1.60 · 36 providers
CHEAPER RIGHT NOW
A100 40GB
live panel, 2026-09-27
| A100 40GB | A100 80GB | |
|---|---|---|
| MAKER | NVIDIA | NVIDIA |
| ARCHITECTURE | Ampere | Ampere |
| LAUNCHED | 2020 | 2020 |
| MEMORY | 40 GB HBM2 | 80 GB HBM2e |
| MEMORY BANDWIDTH | 1.6 TB/s | 2.0 TB/s |
| TENSOR COMPUTE | 312 TFLOPS FP16/BF16 tensor dense (624 sparse) | 312 TFLOPS FP16/BF16 tensor dense (624 sparse) |
| POWER DRAW | 250-400 W by form factor | 250-400 W by form factor |
| INTERCONNECT | NVLink (SXM) or PCIe 4.0 | NVLink 3.0 (SXM) or PCIe 4.0 |
HOW TO CHOOSE
A100 40GB vs A100 80GB
Double the memory for 70B-class work. If you fit in 40 GB, take the cheaper card.
Workload fit
A100 40GB: 7b-13b training, mid-size inference. A100 80GB: fine-tuning, large-model inference, mig multi-tenant serving.
A100 40GB VS A100 80GB - FAQ
Which is cheaper to rent, A100 40GB or A100 80GB?
By today's published on-demand rates: A100 40GB starts at $0.170/GPU/hr (median $1.19, 20 providers) and A100 80GB starts at $0.292/GPU/hr (median $1.60, 36 providers). The cheapest live listing is the A100 40GB at SpotGPUs. Figures recompute from the panel on every refresh.
A100 40GB or A100 80GB - which should I rent?
A100 40GB: The launch-spec A100: full Ampere tensor throughput with 40 GB of HBM2. A100 80GB: The 80 GB A100 in either form factor is the market's reference point for large-model work: enough HBM to fine-tune 70B-class models, enough bandwidth to keep tensor cores fed, and a huge installed base that keeps hourly rates competitive. The side-by-side spec table and live price rows above give the full picture.
Where can I rent A100 40GB and A100 80GB?
20 providers publish A100 40GB rates and 36 publish A100 80GB rates on Compute Cafe. Every row links to the provider's own published price - committed-use and reserved rates are excluded.
Full pricing: A100 40GB · A100 80GB · all comparisons