Intel Core Ultra 7 155U vs Apple M4 (10 cores)

Intel Core Ultra 7 155U

The Intel Core Ultra 7 155U is a mid-range Meteor Lake chip that debuted in December 2023. This 1st Gen Core Ultra processor has come to replace 13th generation Core processors; it has 12 cores (2 + 8 + 2) and 14 threads at its disposal. Its Performance cores, of which there are 2, are HT-enabled and run at up to 4.8 GHz while its Efficient cores, of which there are 10 (8 main cores plus 2 extra ones found in the Low Power Island) run at up to 3.8 GHz. The 4-core Intel Arc Graphics, just out of the oven, serves as the integrated graphics adapter - this runs at up to 1.95 GHz - and there is a bevy of other brand-new technologies on offer as well such as the integrated AI Boost NPU with two Gen 3 engines for hardware AI workload acceleration.

Architecture and Features

With Meteor Lake, Intel intends to deliver higher CPU performance, higher GPU performance and at the same time, longer battery life than what Raptor Lake chips were capable of. The company also wants a large piece of the AI cake and is working with Microsoft and other partners to make that happen. As a result, Windows Defender is now AI-enabled, meaning it can use the Intel NPU to take some of the load off the main CPU cores. We also get this new Intel Device Discovery technology that is designed to give us a better hardware-based remote laptop management than ever before; and, to make things even better, Intel now offers a dedicated Arc Pro graphics driver for workstations.

This generation of Intel Core processors features Redwood architecture P-cores and Crestmont architecture E-cores. Both come with slight architectural improvements over Raptor Cove and Gracemont respectively for slightly higher performance-per-clock figures; the interesting thing is that of the 10 E-cores, two are actually a separate cluster located on what Intel calls a "Low Power Island". Essentially, the latter is an SoC within an SoC that can stay active while most other parts of the chip are temporarily switched off to save power. The low-power E-cores run at up to 2.1 GHz. Intel hopes this approach will let it deliver unprecedentedly low power consumption figures when under low load, boosting battery life of laptops and tablets powered by Meteor Lake.

To build its Meteor Lake processors, Intel uses the Foveros technology (stacking several chips on top of each other). This is a cost-cutting measure more than anything else, as manufacturing several small dies on several different processes is so much cheaper than making a huge single die and hoping that there are no defects in it that will require disabling some parts of it.

Elsewhere, the Core Ultra 7 155U comes with 12 MB of L3 cache which is a significant reduction compared to the 24 MB that the 155H, the 165H and the 185H have. The processor has a decent number of PCIe 4 lanes for NVMe SSD speeds up to 7.8 GB/s; it supports RAM running at up to 7467 MHz (DDR5-5600, LPDDR5-7467, LPDDR5x-7467, to be specific - which is about as good as what 8040 series Ryzen chips have). Naturally, the 155U features built-in Thunderbolt 4 support and Intel CNVi Wi-Fi support. It is also worth mentioning that Intel chose to keep native SATA III support that AMD had removed from its Ryzen processors quite a while ago.

The 155U is compatible with 64-bit Windows 10, 64-bit Windows 11 and with many Linux distros.

Performance

While we have no way of knowing what the 155U will be like, as of December 2023, it's safe to expect the chip to be almost as fast as the Core i7-1340P (Raptor Lake, 12 cores, 16 threads, up to 4.6 GHz), as far as multi-thread performance is concerned.

Either way, real-world performance of the chip may vary significantly depending on how high the CPU power limits are and how competent the cooling solution of the system is.

Graphics

The 4-core Arc Graphics runs at up to 1.95 GHz. We expect the iGPU to be about as fast as the aging 96 EU Iris Xe meaning it's good enough for most games, as long as one sticks to 1080p and mostly low quality settings.

A proper DX12 Ultimate graphics adapter, the Arc Graphics is no stranger to ray tracing and other modern technologies including AI frame generation (XeSS). It will let you connect up to four SUHD 4320p monitors and it will both HW-encode and HW-encode the most widely used video codecs including AVC, HEVC and AV1 in a fast and efficient manner.

Your mileage may vary depending on how high the CPU power limits are, how competent the cooling solution of your system is, how fast the RAM of your system is.

Power consumption

This Core Ultra 7 series processor has a Base power consumption of 15 W, with 57 W being its maximum Intel-recommended Turbo power consumption. An active cooling solution is a must for a system powered by this chip.

The 155U is comprised of several small chips ("tiles") that are connected using Intel's Foveros technology. The tile containing main CPU cores is produced on the fairly modern 7 nm Intel process marketed as Intel 4 while most other tiles (the iGPU, the I/O die, ...) are built with TSMC's N5 and N6 processes. The base tile is built with the old Intel 22FFL process.

Apple M4 (10 cores)

The 10-core Apple M4 is an impressively fast ARM architecture processor (SoC) sporting 4 performance and 6 efficient CPU cores along with a 16-core neural engine and a 10-core GPU with hardware RT support and other modern features. On-package 7500 MT/s LPDDR5x RAM, USB 4 support and Thunderbolt 4 support are onboard as well, as are Wi-Fi 6E and Bluetooth 5.3.

The M4 debuted in May 2024 as part of an iPad launch event; its 4 performance cores run at up to 4.4 GHz, representing a healthy improvement over the M3 (10-core GPU) and its 4.06 GHz top clock speed. Besides, this new chip also has 6 efficient cores at its disposal that run at up to 2.9 GHz. The M3 had to make do with 4 performance cores and 4 efficient cores, for reference.

Architecture and Features

The new CPU cores run at faster clock speeds than what the M3 was capable of while also featuring some minor architectural improvements. A heavily customized version of ARM's v9.4-A microarchitecture is reportedly employed here. The M4 comes with on-package LPDDR5x-7500 RAM (120 GB/s) whereas the M3 was limited to 6400 MT/s. The updated NPU delivers up to 38 TOPS of performance for AI workloads.

Performance

In 2024 iPad Pros, the 3 nm chip is 10% to 20% faster than the M3 (10 GPU cores) in both multi-thread and single-thread short-term workloads. It also delivers about 10% higher multi-thread performance than the 9-core M4. This puts the 10-core part on an equal footing with the Ryzen 7 7745HX, Core i7-13705H and other higher-end x86 processors released in 2023 and 2024.

iPad Pros come with no active cooling solution however Mac minis and MacBook Pros do have one and the latest iMacs probably do as well. As our Fall 2024 Mac mini review shows, the M4's short-term performance doesn't benefit much from the presence of a fan, however its sustained performance benefits tremendously.

Graphics

The M4 GPU (10 cores) has hardware support for ray tracing as well as mesh shading and other modern technologies. It supports external displays with resolutions as high as 8K.

The graphics adapter runs at higher clock speeds than what the (otherwise identical) 10-core GPU built into the 9-core M4 can muster. As our Mac mini 2024 review confirmed, its performance is good enough to run many 2023 and 2024 games at 1080p on low or medium quality settings.

• Сyberpunk 2077 2.1 Phantom Liberty (1080p, Med): 28 fps

Much like it is with CPU performance, M4-powered iPad Pros will be much slower in long-term GPU-intensive workloads than iMacs, Mac minis and MacBook Pros due to the lack of proper cooling.

Power consumption

This specific M4 chip is found in 2024 iPad Pros, 2024 iMacs, 2024 Mac minis and 2024 MacBook Pros. Within the thin metal cases of the iPads - no active cooling - the chip's sustained power consumption hovers in the 4 W - 5 W area, with short-term peaks of up to 14 W possible. However, Mac minis and MacBook Pros do have an active cooling solution (and the new iMacs probably do, too) meaning the power consumption figures are several times higher. In our Fall 2024 Mac mini review, the SoC consumed 30 W to 40 W when under high loads.

The M4 is built with a "second generation" 3 nm TSMC process which is still cutting-edge as of late 2024.