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Apple M3 vs Apple M3 Ultra

The M3 Ultra delivers 9.3x the FP32 throughput of the M3 (33 vs 3.5 TFLOPS dense). The M3 Ultra also carries 488 GB more memory (512 GB vs 24 GB).

M3: Apple M3, 2023 M3 Ultra: Apple M3, 2025
FP32 dense lead
9.3x
M3 Ultra: 33 vs 3.5 TFLOPS
Memory
24 vs 512 GB
488 GB more for the M3 Ultra
Bandwidth
100 GB/s vs 819 GB/s
M3 Ultra moves data faster
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Apple M3 vs Apple M3 Ultra

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Apple M3

Full specs →

What is the Apple M3?

The M3 is an APU from Apple on the Apple M3 architecture, an processor that pairs CPU and GPU on one chip. It is a system-on-chip, so it is built into edge and embedded devices rather than sold as a card. M3 full specifications →

Can I rent the M3 in the cloud?

Flopper is not tracking any live rental listings for the M3 yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the M3 compare with other accelerators?

This page sets the M3 against the M3 Ultra. The M3 is the older generation of the two. Both are Apple parts, and both ship as a system-on-chip, so they fit the same class of system. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the M3 figures come from?

Apple published the M3 figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

Apple M3 Ultra

Leads on FP32 Full specs →

What is the Apple M3 Ultra?

The M3 Ultra is an APU from Apple on the Apple M3 architecture, an processor that pairs CPU and GPU on one chip. It is a system-on-chip, so it is built into edge and embedded devices rather than sold as a card. M3 Ultra full specifications →

Can I rent the M3 Ultra in the cloud?

Flopper is not tracking any live rental listings for the M3 Ultra yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the M3 Ultra compare with other accelerators?

This page sets the M3 Ultra against the M3. The M3 Ultra is the newer generation of the two. Both are Apple parts, and both ship as a system-on-chip, so they fit the same class of system. Flopper also compares it head to head with the M5 Ultra, across every published precision, memory and power. M3 Ultra vs M5 Ultra →

Where do the M3 Ultra figures come from?

Apple published the M3 Ultra figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

Specifications

M3
M3 Ultra
Architecture
Apple M3Apple M3
Launch Year
20232025
Form Factor
SoCSoC
Memory
24 GB512 GB
Memory Bandwidth
100 GB/s819 GB/s
TDP
——
Process Node
3nm3nm

Performance (TFLOPS)

M3
M3 Ultra
No verified data available No verified data available
3.5 TFLOPS 33 TFLOPS
No verified data available No verified data available
No verified data available No verified data available
No verified data available No verified data available
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
No verified data available No verified data available

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 M3 Ultra is the newer part: Apple M3 (2025) against the M3's Apple M3 (2023).

The M3 Ultra carries 488 GB more memory (512 GB against 24 GB), so larger models fit on one GPU before you shard. Bandwidth is 100 GB/s against 819 GB/s, which sets the ceiling on decode speed.

Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP32, Sparsity and TFLOPS.

Frequently asked questions

Is the M3 faster than the M3 Ultra?

At FP32 precision the M3 Ultra reaches 33 TFLOPS dense against 3.5 TFLOPS for the M3. The performance table on this page lists every published precision for both GPUs.

Which should you choose, the M3 or the M3 Ultra?

Choose the M3 Ultra for training and high-throughput inference: it has 9.3x the FP32 throughput of the M3. It also carries 488 GB more memory, so larger models fit on one GPU before you shard.

Which has more memory, the M3 or the M3 Ultra?

The M3 Ultra carries 512 GB of memory versus 24 GB for the M3. Memory bandwidth is 100 GB/s for the M3 and 819 GB/s for the M3 Ultra.

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