Quick Verdict
M3 Pro is an excellent, efficient chip for most pro workloads, especially if you’re upgrading from Intel or M1, but the step sideways in GPU cores and memory bandwidth versus M2 Pro makes the upgrade from M2 Pro less compelling for some users.
Overview
Launch
2023
Status
DiscontinuedGeneration
3rd gen Apple silicon (M3)
Market
Pro laptop / all-in-one
The Apple M3 Pro is a 3 nm ARM-based system-on-chip with an 11- or 12-core CPU and 14- or 18-core integrated GPU, designed for professional MacBook Pro workflows that demand strong single-threaded performance, hardware-accelerated ray tracing, and high efficiency rather than maximum multi-core throughput.
M3 Pro sits between M3 and M3 Max in Apple’s lineup. It offers a 12-core CPU (6P+6E) or 11-core (5P+6E), 14- or 18-core GPU, hardware ray tracing, and 150 GB/s of unified memory bandwidth, which is 25% lower than the 200 GB/s of M1/M2 Pro. CPU single-core performance is excellent and near M3 Max, while multi-core gains over M2 Pro are modest.
Efficiency is a clear win: it does more work per watt than earlier Pro chips. If you’re on Intel or M1, M3 Pro feels like a big upgrade; from M2 Pro, the value depends on how much you care about ray tracing and efficiency versus peak GPU bandwidth and core count.
Specifications
Performance
Excellent single-core and good multi-core performance for typical pro apps, with snappy responsiveness and very good efficiency.
Capable for light VMs, but memory bandwidth and core count are lower than M2 Pro/M3 Max, which can matter for heavy multi-VM workloads.
Strong 1080p and capable 1440p gaming with good efficiency; GPU core and bandwidth cuts versus M2 Pro mean some titles may not scale as well at higher resolutions.
Among the most efficient Pro-class SoCs Apple has shipped; does more CPU work per watt than earlier Pro chips.
- •Hardware ray tracing improves lighting and reflections in supported titles
- •Strong 1080p and 1440p performance with Metal-optimized games
- •Some GPU benchmarks show regressions vs M2 Pro due to fewer cores and lower bandwidth
- •16-core Neural Engine up to ~18 TOPS
- •Good for on-device inference and Core ML workloads
- •Not designed for training large models; GPU-focused workloads may favor M3 Max
Architecture
3 nm (TSMC N3B)
Process Node
Ibiza / Lobos / Palma
Codename
12C / 12T
Core Config
Architecture Overview
The M3 Pro is a 3 nm ARM-based SoC with a big.LITTLE CPU cluster, a next-generation GPU with Dynamic Caching and hardware ray tracing, and a unified memory architecture with LPDDR5-6400 and 150 GB/s bandwidth, narrower than the 256-bit bus on M1/M2 Pro.
CPU Design
M3 Pro offers 11 or 12 CPU cores: 5 or 6 high-performance cores (up to 4.05 GHz) and 6 efficiency cores (up to 2.75 GHz). The performance cores are a refined architecture versus M2, delivering higher IPC and clocks, while efficiency cores focus on low-power background tasks.
Memory Subsystem
12 LPDDR5-6400 memory controllers provide a 192-bit bus and 150 GB/s bandwidth, down from 200 GB/s on M1/M2 Pro. Unified memory is shared by CPU, GPU and NPU, with up to 36 GB capacity on M3 Pro.
PCIe & I/O
External connectivity is provided via three Thunderbolt 4 (USB4) ports, each supporting up to 40 Gb/s and PCIe 4.0 downstream for SSDs and other devices. No classic PCIe slot; all high-speed I/O is through Thunderbolt/USB4.
Overclocking
No end-user overclocking; Apple sets conservative, efficiency-oriented power and frequency limits. Performance is consistent whether on battery or plugged in.
- 3 nm process for better efficiency and higher clocks
- Next-generation GPU with Dynamic Caching and hardware ray tracing
- Higher single-core performance versus M2 Pro
- Better energy efficiency for CPU-intensive work
Key Highlights
- Strong single-core performance and responsive day-to-day feel
- Excellent efficiency and battery life under pro workloads
- Hardware-accelerated ray tracing and mesh shading on Mac for the first time
- Unified memory architecture simplifies development and memory management
- Very quiet and cool operation in typical MacBook Pro configs
- 25% lower memory bandwidth than M1/M2 Pro (150 vs 200 GB/s)
- Some M3 Pro variants have fewer GPU cores than equivalent M2 Pro models
- Modest multi-core CPU gains over M2 Pro in many benchmarks
- No user-upgradable RAM or internal PCIe slots; fully soldered SoC
- Platform is now discontinued in favor of M4 Pro
History
The M3 Pro debuted in October 2023 as Apple’s first 3 nm Pro chip for Macs, following the M1 and M2 Pro generations. It introduced a reconfigured core layout and a next-generation GPU with Dynamic Caching and hardware ray tracing, but also a controversial 192-bit memory bus that reduced bandwidth versus M1/M2 Pro. Early reviews highlighted strong efficiency and single-threaded performance but only modest multi-core gains and mixed GPU results, making M3 Pro feel more like an efficiency-focused refresh than a straightforward leap over M2 Pro.
It was discontinued in October 2024 when Apple moved to the M4 Pro generation.
Improvements over Previous Generation
- 3 nm process for better efficiency and higher clocks
- Next-generation GPU with Dynamic Caching and hardware ray tracing
- Higher single-core performance versus M2 Pro
- Better energy efficiency for CPU-intensive work
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Upgrading from Intel or M1 MacBook Pro to a modern, efficient Pro laptop for coding, creative work, and general pro use.
Avoid if…
- You already own an M2 Pro and don’t care about ray tracing or modest efficiency gains
- Your workflow is extremely GPU-heavy and memory-bandwidth-sensitive
- You want maximum multi-core performance for the price and prefer Windows/x86
Use Cases
Interesting Facts
M3 Pro is the first Apple silicon Pro chip to use a 3 nm process for Macs.
Its 192-bit memory bus is narrower than the 256-bit bus of M1/M2 Pro, reducing bandwidth by 25%.
M3 Pro’s GPU was the first Apple silicon GPU to support hardware-accelerated ray tracing and mesh shading on Mac.
Apple’s own testing showed M3 Pro using roughly half the power of M1 to deliver similar graphics performance in some workloads.
The 12-core M3 Pro CPU has 6 performance and 6 efficiency cores, the same ratio as M3 but with one fewer performance core than the 8P+4E M2 Pro in some configs.
M3 Pro’s GPU core count ranges from 14 to 18, compared to 16–19 on M2 Pro, leading to mixed GPU benchmark results versus its predecessor.
Dynamic Caching in the GPU dynamically allocates local memory in hardware, which Apple calls the biggest leap in graphics architecture for Apple silicon so far.
Despite the bandwidth reduction, real-world tests show M3 Pro often matching or slightly beating M2 Pro in CPU-heavy tasks while using less power.
M3 Pro was introduced alongside M3 and M3 Max at a single “Scary Fast” event, marking the first time Apple launched all three tiers simultaneously.
MacBook Pro models with M3 Pro support three Thunderbolt 4 ports and up to two external displays, unlike the base M3 model which is limited to Thunderbolt 3 and fewer displays.
People Also Ask
Is Apple M3 Pro better than M2 Pro?
M3 Pro has better single-core CPU performance and much better efficiency, and adds hardware ray tracing, but some configs have fewer GPU cores and 25% less memory bandwidth, so GPU-heavy workloads may not always improve.
Why does M3 Pro have less memory bandwidth than M1/M2 Pro?
Apple reduced the memory bus width from 256-bit on M1/M2 Pro to 192-bit on M3 Pro, cutting theoretical bandwidth from 200 GB/s to 150 GB/s, likely to save die area and power and to differentiate M3 Max.
How much RAM does M3 Pro support?
M3 Pro supports up to 36 GB of unified LPDDR5-6400 memory, shared between CPU, GPU and Neural Engine.
Is M3 Pro good for gaming?
Yes for 1080p and 1440p gaming with Metal-optimized titles and hardware ray tracing, but some GPU benchmarks are slightly lower than M2 Pro due to fewer cores and lower bandwidth.
What process node does M3 Pro use?
M3 Pro is built on TSMC’s 3 nm N3B process, Apple’s first 3 nm chip for Macs.
How many CPU cores does M3 Pro have?
M3 Pro comes in 11-core (5P+6E) and 12-core (6P+6E) CPU configurations.
How many GPU cores does M3 Pro have?
M3 Pro GPUs have either 14 or 18 cores, depending on the configuration.
Does M3 Pro support hardware ray tracing?
Yes, M3 Pro’s GPU includes hardware-accelerated ray tracing and mesh shading, a first for Apple silicon Macs.
Is M3 Pro good for video editing?
Yes, it’s excellent for 4K and many 8K workflows in Final Cut Pro, Premiere, and Resolve, especially if you’re upgrading from Intel or M1.
Should I upgrade from M2 Pro to M3 Pro?
Only if you value efficiency, ray tracing, or single-core gains; otherwise the step in GPU bandwidth and core count makes the upgrade minor for some users.
Frequently Asked Questions
Does M3 Pro have integrated graphics?
Yes, it integrates a 14- or 18-core Apple GPU with hardware ray tracing and Dynamic Caching.
Can you upgrade RAM or storage on M3 Pro?
No, both RAM and storage are soldered on the package/board; you must configure them at purchase time.
What Thunderbolt version does M3 Pro support?
M3 Pro MacBook Pros use three Thunderbolt 4 ports, each supporting up to 40 Gb/s and USB4.
How does M3 Pro compare to M3 Max?
M3 Max has more CPU and GPU cores, wider memory bus (up to 400 GB/s), and supports up to 128 GB RAM, making it better for heavy GPU and memory-bound workloads.
Is M3 Pro fanless?
No, M3 Pro MacBook Pros have active cooling fans, but they are rarely audible under typical workloads.
Does M3 Pro support AV1 decode?
Yes, the media engine in M3 Pro includes hardware-accelerated AV1 decode along with H.264, HEVC, and ProRes.
What is Dynamic Caching on M3 Pro?
Dynamic Caching is a GPU feature that dynamically allocates on-chip local memory based on real-time workload, improving GPU utilization and performance in pro apps and games.
Can M3 Pro run Windows?
Not officially; Windows can only run via virtualization or remote access, since Apple silicon Macs no longer support Boot Camp.
Is M3 Pro good for programming?
Yes, its strong single-core performance and efficiency make it very comfortable for IDEs, containers, and large codebases.
How does M3 Pro compare to Intel Core Ultra 7 155H?
M3 Pro generally leads in single-core performance and efficiency, while Core Ultra 7 155H can win in highly threaded x86 workloads and offers broader Windows compatibility.