NVIDIA A100 PCIe 40GB vs NVIDIA A100 PCIe 80GB
The A100 PCIe 40GB and the A100 PCIe 80GB deliver near-identical FP16 throughput (312 vs 312 TFLOPS dense). The A100 PCIe 80GB also carries 40 GB more memory (80 GB vs 40 GB).
NVIDIA A100 PCIe 40GB
Full specs →NVIDIA A100 PCIe 80GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
The A100 PCIe 80GB is the newer part: Ampere, launched in 2021, against the A100 PCIe 40GB's Ampere from 2020. Newer architectures typically add lower-precision formats and better throughput per watt, so check the precision rows your workload actually uses.
Dense throughput for the A100 PCIe 40GB against the A100 PCIe 80GB: FP64 9.7 vs 9.7 TFLOPS, FP32 20 vs 20 TFLOPS, FP16 312 vs 312 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 40 GB against 80 GB, fed at 1.6 TB/s versus 1.9 TB/s. More memory per GPU means larger models fit before you have to shard across cards, which often matters more than raw TFLOPS for inference.
Power budgets are 250 W for the A100 PCIe 40GB and 300 W for the A100 PCIe 80GB. At FP32 that works out to 0.08 against 0.07 TFLOPS per watt.
For LLM training and inference, weight the FP8 and FP16 rows and memory capacity most heavily. For scientific and HPC workloads, the FP64 row is the one to read.
Frequently asked questions
Is the A100 PCIe 40GB faster than the A100 PCIe 80GB?
They are close on paper: both deliver about 312 TFLOPS of dense FP16 throughput. Memory, bandwidth, and power are the deciding differences.
Which has more memory, the A100 PCIe 40GB or the A100 PCIe 80GB?
The A100 PCIe 80GB carries 80 GB of memory versus 40 GB for the A100 PCIe 40GB. Memory bandwidth is 1.6 TB/s for the A100 PCIe 40GB and 1.9 TB/s for the A100 PCIe 80GB.
How much power do the A100 PCIe 40GB and the A100 PCIe 80GB draw?
The A100 PCIe 40GB is rated at 250 W TDP and the A100 PCIe 80GB at 300 W. On FP32 throughput per watt, the A100 PCIe 40GB is the more efficient part.
Can I rent the A100 PCIe 40GB or the A100 PCIe 80GB in the cloud?
Yes. Live cloud listings tracked by Flopper start at $0.53 per GPU hour. The rental pricing section on this page lists current providers and rates for both GPUs.
Where to Rent
NVIDIA A100 PCIe 40GB
All A100 PCIe 40GB listings and price history →
NVIDIA A100 PCIe 80GB
| Provider | Configuration | Price/GPU-hr | Checked | |
|---|---|---|---|---|
| 1× A100 PCIe Community | $0.87 | 1h ago | View → | |
 Oblivus | 1× A100 PCIe Reserved | $0.95 | 1h ago | View → |
| 1× A100 PCIe Spot | $1.08 | 1h ago | View → | |
| 1× A100 PCIe Community | $1.19 | 1h ago | View → | |
| 1× A100 PCIe | $1.35 | 1h ago | View → | |
| Oblivus | 1× A100 PCIe | $1.47 | 1h ago | View → |
| 1× A100 PCIe | $1.50 | 1h ago | View → | |
| 1× A100 PCIe | $1.59 | 1h ago | View → | |
| 1× A100 PCIe | $2.00 | 1h ago | View → | |
| 2× A100 PCIe | $3.67 | 13h ago | View → | |
| 1× A100 PCIe | $3.67 | 13h ago | View → | |
| 4× A100 PCIe | $3.67 | 13h ago | View → | |
 Shadeform Massed Compute capacity | 8× A100 PCIe | $1.35 | 1h ago | View → |
| 1× A100 PCIe | $1.99 | 1h ago | View → | |
| Shadeform Paperspace capacity | 8× A100 PCIe | $3.11 | 1h ago | View → |
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