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Apple M5 Ultra vs Apple M3 Ultra

The M5 and the M3 Ultra deliver near-identical FP32 throughput (33 vs 33 TFLOPS dense).

M5: Apple M5, 2026 M3 Ultra: Apple M3, 2025
Memory
512 vs 512 GB
Same capacity
Bandwidth
1.2 TB/s vs 819 GB/s
M5 moves data faster
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Apple M5 Ultra vs Apple M3 Ultra

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Apple M5 Ultra

Full specs →

What is the Apple M5?

The M5 is an APU from Apple on the Apple M5 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. M5 full specifications →

Can I rent the M5 in the cloud?

Flopper is not tracking any live rental listings for the M5 yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the M5 compare with other accelerators?

This page sets the M5 against the M3 Ultra. The M5 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 Max and DGX Spark, across every published precision, memory and power. M5 vs M5 Max →

Where do the M5 figures come from?

Apple published the M5 figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

Apple M3 Ultra

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 M5. The M3 Ultra 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 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

M5
M3 Ultra
Architecture
Apple M5Apple M3
Launch Year
20262025
Form Factor
SoCSoC
Memory
512 GB512 GB
Memory Bandwidth
1.2 TB/s819 GB/s
TDP
——
Process Node
3nm3nm

Performance (TFLOPS)

M5
M3 Ultra
No verified data available No verified data available
33 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 M5 Ultra does not run a single model the M3 Ultra cannot. Both top out at 512 GB of unified memory with 80 GPU cores, so upgrading buys speed, not reach, and a discounted M3 Ultra holds exactly the same models.

The speed comes from two changes. Memory bandwidth rises from 819 GB/s to 1.2 TB/s, nearly half again, and token generation on Apple silicon follows bandwidth. The new Neural Accelerator in every GPU core drives Apple’s “up to 4.3x peak AI compute” claim, which helps prompt processing far more than generation; reading it as 4.3x faster output is the trap. FP32 is level, and neither figure is Apple’s.

Buy the M5 Ultra if you feed it long prompts and documents all day. For chat-length work, a cheaper M3 Ultra gives up only the bandwidth gap. See also the M5 Max or the DGX Spark.

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

Frequently asked questions

Is the M5 Ultra faster than the M3 Ultra for local LLMs?

Yes. Memory bandwidth rises from 819 GB/s to 1.2 TB/s, and token generation on Apple silicon follows bandwidth. Apple also states up to 4.3x the M3 Ultra's peak AI compute, which comes from the new per-core Neural Accelerators and mainly speeds prompt processing. Apple publishes no FLOPS for either chip.

Can the M5 Ultra run larger models than the M3 Ultra?

No. Both chips top out at 512 GB of unified memory, so any model that fits on one fits on the other, from a 70B-class model at FP16 to quantised models with hundreds of billions of parameters. The upgrade changes speed, not which models you can load.

Should I upgrade from an M3 Ultra to an M5 Ultra?

Upgrade if you process long prompts or documents all day, where the Neural Accelerators and extra bandwidth both pay off. If your M3 Ultra already holds your models and the wait is tolerable, keep it: the M5 Ultra adds speed only, and memory is fixed at purchase on both.

Is a discounted M3 Ultra still a good buy?

Yes, if the saving outweighs the bandwidth gap. It holds exactly the same models with the same 80 GPU cores. Flopper tracks no rental listings for either chip; for occasional jobs on very large models, renting a datacenter GPU by the hour can cost less than either Mac Studio.

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