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NVIDIA A100 SXM4 40GB vs NVIDIA A800 PCIe 80GB

The A100 and the A800 deliver near-identical FP16 throughput (312 vs 312 TFLOPS dense). The A800 also carries 40 GB more memory (80 GB vs 40 GB).

A100: Ampere, 2020 A800: Ampere, 2022
Memory
40 vs 80 GB
40 GB more for the A800
Bandwidth
1.6 TB/s vs 1.9 TB/s
A800 moves data faster
TDP
400 W vs 300 W
A800 draws 100 W less
See rental pricing from $0.45/hr Download comparison sheet

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NVIDIA A100 SXM4 40GB vs NVIDIA A800 PCIe 80GB

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NVIDIA A100 SXM4 40GB

Full specs →

What is the NVIDIA A100?

The A100 is a GPU from NVIDIA on the Ampere architecture, an accelerator for AI training, inference and high-performance computing. It is an SXM module, the mezzanine format used in dense multi-GPU servers. A100 full specifications →

Can I rent the A100 in the cloud?

Yes. Cloud providers tracked by Flopper rent the A100 by the hour, and the pricing page compares their current rates and the price history side by side. A100 rental prices →

How does the A100 compare with other accelerators?

This page sets the A100 against the A800. The A100 is the older generation of the two. Both are NVIDIA parts; the A100 is an SXM module while the A800 is a PCIe card. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the A100 figures come from?

Every A100 figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

NVIDIA A800 PCIe 80GB

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 A100. The A800 is the newer generation of the two. Both are NVIDIA parts; the A800 is a PCIe card while the A100 is an SXM module. 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

A100
A800
Architecture
AmpereAmpere
Launch Year
20202022
Form Factor
SXMPCIe
Memory
40 GB80 GB
Memory Bandwidth
1.6 TB/s1.9 TB/s
TDP
400 W300 W
Process Node
7nm7nm

Performance (TFLOPS)

A100
A800
9.7 TFLOPS 9.7 TFLOPS
20 TFLOPS 20 TFLOPS
156 TFLOPS
312 TFLOPS sparse
156 TFLOPS
sparse not published
312 TFLOPS
624 TFLOPS sparse
312 TFLOPS
sparse not published
312 TFLOPS
624 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
624 TOPS
1,248 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 A100's Ampere (2020).

The A800 carries 40 GB more memory (80 GB against 40 GB), so larger models fit on one GPU before you shard. Bandwidth is 1.6 TB/s against 1.9 TB/s, which sets the ceiling on decode speed.

Power is 400 W against 300 W, and at FP32 the A800 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 A100 faster than the A800?

They are close on paper: both deliver about 312 TFLOPS of dense FP16 throughput. Memory, bandwidth, and power are the deciding differences.

Which should you choose, the A100 or the A800?

On raw FP16 throughput the A100 and the A800 are level, so the decision rests on memory, power and price. Choose the A800 when the model has to fit on one GPU: it carries 40 GB more memory. The A800 draws 100 W less power, which matters in an air-cooled or power-capped rack. Packaging differs too: the A100 is an SXM module while the A800 is a PCIe card, so check what your servers accept.

Which has more memory, the A100 or the A800?

The A800 carries 80 GB of memory versus 40 GB for the A100. Memory bandwidth is 1.6 TB/s for the A100 and 1.9 TB/s for the A800.

How much power do the A100 and the A800 draw?

The A100 is rated at 400 W TDP and the A800 at 300 W. On FP32 throughput per watt, the A800 is the more efficient part.

How much do the A100 and the A800 cost to rent?

Live cloud listings tracked by Flopper price the A100 from $0.45 per GPU-hour across 9 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 A100 SXM4 40GB

Rent from

$0.45 / GPU-hr

Lowest of 14 live listings across 9 providers · median $2.05

See all A100 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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