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NVIDIA A40 48GB vs NVIDIA A800 PCIe 80GB

The A800 delivers 2.1x the FP16 throughput of the A40 (312 vs 150 TFLOPS dense). The A800 also carries 32 GB more memory (80 GB vs 48 GB).

A40: Ampere, 2021 A800: Ampere, 2022
FP16 dense lead
2.1x
A800: 312 vs 150 TFLOPS
Memory
48 vs 80 GB
32 GB more for the A800
Bandwidth
696 GB/s vs 1.9 TB/s
A800 moves data faster
TDP
300 W vs 300 W
Same power budget
See rental pricing from $0.35/hr Download comparison sheet

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NVIDIA A40 48GB vs NVIDIA A800 PCIe 80GB

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NVIDIA A40 48GB

Full specs →

What is the NVIDIA A40?

The A40 is a GPU from NVIDIA on the Ampere architecture, an accelerator for AI training, inference and high-performance computing. It is a PCIe add-in card, so it fits standard servers and workstations. A40 full specifications →

Can I rent the A40 in the cloud?

Yes. Cloud providers tracked by Flopper rent the A40 by the hour, and the pricing page compares their current rates and the price history side by side. A40 rental prices →

How does the A40 compare with other accelerators?

This page sets the A40 against the A800. The A40 is the older generation of the two. Both are NVIDIA parts, and both ship as a PCIe card, so they fit the same class of system. Flopper also compares it head to head with the SC11 FP300, across every published precision, memory and power. A40 vs SC11 FP300 →

Where do the A40 figures come from?

Every A40 figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

NVIDIA A800 PCIe 80GB

Leads on FP16 Full specs →

What is the NVIDIA A800?

The A800 is a GPU from NVIDIA on the Ampere architecture, an accelerator for AI training, inference and high-performance computing. It is a PCIe add-in card, so it fits standard servers and workstations. A800 full specifications →

Can I rent the A800 in the cloud?

Flopper is not tracking any live rental listings for the A800 yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the A800 compare with other accelerators?

This page sets the A800 against the A40. The A800 is the newer generation of the two. Both are NVIDIA parts, and both ship as a PCIe card, so they fit the same class of system. Flopper also compares it head to head with the A800 SXM4, across every published precision, memory and power. A800 vs A800 SXM4 →

Where do the A800 figures come from?

Every A800 figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

Specifications

A40
A800
Architecture
AmpereAmpere
Launch Year
20212022
Form Factor
PCIePCIe
Memory
48 GB80 GB
Memory Bandwidth
696 GB/s1.9 TB/s
TDP
300 W300 W
Process Node
—7nm

Performance (TFLOPS)

A40
A800
No verified data available9.7 TFLOPS
37 TFLOPS 20 TFLOPS
75 TFLOPS
150 TFLOPS sparse
156 TFLOPS
sparse not published
150 TFLOPS
299 TFLOPS sparse
312 TFLOPS
sparse not published
150 TFLOPS
299 TFLOPS sparse
312 TFLOPS
sparse not published
No verified data available No verified data available
FP6
No verified data available No verified data available
No verified data available No verified data available
299 TOPS
599 TOPS sparse
624 TOPS
sparse not published

Figures are dense. Where a vendor publishes a figure it sits under the dense one and never decides a winner. Hover any precision for its definition, or read the GPU glossary.

FLOPS by Precision

What actually differs

The A800 is the newer part: Ampere (2022) against the A40's Ampere (2021).

The A800 carries 32 GB more memory (80 GB against 48 GB), so larger models fit on one GPU before you shard. Bandwidth is 696 GB/s against 1.9 TB/s, which sets the ceiling on decode speed.

Power is 300 W against 300 W, and at FP32 the A40 does more work per watt. Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP64, FP32, TF32, BF16, FP16, INT8, Sparsity and TFLOPS. For how the generations relate, see NVIDIA architectures explained.

Frequently asked questions

Is the A40 faster than the A800?

At FP16 precision the A800 reaches 312 TFLOPS dense against 150 TFLOPS for the A40. The performance table on this page lists every published precision for both GPUs.

Which should you choose, the A40 or the A800?

Choose the A800 for training and high-throughput inference: it has 2.1x the FP16 throughput of the A40. It also carries 32 GB more memory, so larger models fit on one GPU before you shard.

Which has more memory, the A40 or the A800?

The A800 carries 80 GB of memory versus 48 GB for the A40. Memory bandwidth is 696 GB/s for the A40 and 1.9 TB/s for the A800.

How much power do the A40 and the A800 draw?

The A40 is rated at 300 W TDP and the A800 at 300 W. On FP32 throughput per watt, the A40 is the more efficient part.

How much do the A40 and the A800 cost to rent?

Live cloud listings tracked by Flopper price the A40 from $0.35 per GPU-hour across 3 providers, and no live listings yet for the A800. The rental section on this page links to every provider, rate and the price history for each GPU.

Where to Rent

NVIDIA A40 48GB

Rent from

$0.35 / GPU-hr

Lowest of 4 live listings across 3 providers

See all A40 rental prices →

Price history and every provider on the pricing page. Some links are affiliate links.

NVIDIA A800 PCIe 80GB

No live rental listings tracked for the A800 yet.

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