Qualcomm Snapdragon X Plus X1P-42-100 vs Apple M3

Qualcomm Snapdragon X Plus X1P-42-100

The Snapdragon X Plus X1P-42-100 is a relatively affordable ARM architecture processor (SoC) for use in Windows laptops that is rumored to debut some time in H2 2024. The X1P-42-100 is thought to have 8 Oryon CPU cores (8 threads) running at a not yet known clock speed of at least 3.0 GHz. As far as other key features are concerned, the X Plus probably comes with the same 3.8 TFLOPS Adreno X1-85 GPU, 45 TOPS Hexagon NPU and LPDDR5x-8448 memory controller that its bigger and smarter brother, the X1P-64-100, employs.

Architecture and Features

Qualcomm Oryon cores are in part based on Nuvia IP; they most likely make use of the ARM v8.7 microarchitecture. Much like modern AMD and Intel processors, the Snapdragon chip is compatible with USB 4 and thus with Thunderbolt 4 but it remains to be seen if it is is compatible with GeForce or Radeon discrete graphics cards.

The SoC is said to have 8 PCIe 4 and 4 PCIe 3 lanes for connecting various kinds of devices. NVMe SSDs are supported with a throughput of up to 7.9 GB/s. A 45 TOPS NPU for accelerating AI workloads is most likely included.

This X Plus chip does not make use of the same die that the X1P-64-100, X1E-78-100, X1E-80-100, X1E-84-100 are based on.

Performance

The faster X1P-64-100 (10 CPU cores running at higher clock speeds) is about as fast as the Intel Core i7-13700H and the 9-core Apple M4 are in multi-thread workloads. This means the X1P-42-100 will most likely be about as fast as the Intel Core i7-12650H and the AMD Ryzen 7 PRO 6850H which is not bad at all for what is supposedly an almost budget CPU.

Like any other Windows on ARM platform, the Snapdragon X chip works best with applications and games compiled specifically for ARM processors. If making use of the built-in x86 to ARM emulation mode, a performance penalty of about 20% is to be expected.

Graphics

The 3.8 TFLOPS Adreno X1-85 GPU is DirectX 12-enabled but not DirectX 12 Ultimate-enabled, despite featuring VRS and ray tracing support. The 3.8 TFLOPS of performance that it supposedly delivers pale in comparison to the slowest current-generation professional Nvidia Ada graphics card for laptops, the RTX 500 Ada, that delivers up to 9.2 TFLOPS.

Its gaming performance is rather underwhelming; while slightly faster than the aging Iris Xe (96 EUs), the Adreno is not fast enough to outpace the Radeon 780M meaning there is little point in comparing it with full-fat discrete graphics cards. Baldur's Gate 3, a triple-A title released in 2023, is pretty much unplayable at 1080p / Low. GTA V, a game that saw the light of day in 2015, is playable at 1080p / High.

The Qualcomm iGPU will let you use up to 3 UHD 2160p monitors simultaneously. 2160p120 integrated displays are supported, as are the popular AV1, HEVC and AVC video codecs (both decoding and encoding). The hardware does not support the VVC codec; that feature remains a Lunar Lake exclusive for now.

Power consumption

The X1P-42-100 is most likely going to be less power-hungry than its more powerful X Elite brothers. Expect to see anything between 10 W and 35 W under long-term workloads because that's what Ryzen U chips normally consume.

The SoC is built with a 4 nm TSMC process for decent, as of H1 2024, energy efficiency.

Apple M3

The Apple M3 is a system on a chip (SoC) from Apple for notebooks that was introduced in late 2023. It integrates a new 8-core CPU with 4 performance cores with up to 4.06 GHz and 4 efficiency cores running at up to 2.75 GHz. Apple claims that the CPU is up to 20% faster than in the old Apple M2 (3.5 GHz). 

Due to the higher clock speeds and architecture improvements, the processor performance is also significantly better than the M2 in benchmarks (see e.g. Geekbench below) and can keep up with the fastest CPUs in short single-core tests (like the Raptor Lake i9-13950HX).

The M3 also integrates a new graphics adapter with dynamic caching, mesh shading and ray tracing acceleration. According to Apple, it is 20% faster than the GPU in the M2. The chip integrates again 10 GPU cores, but the cheaper variant only offers 8 cores (e.g. in the entry iMac). Furthermore, the GPU only supports 2 displays (an additional 6K60 display to the internal one).

Both GPU and CPU can access the unified memory on the package together. It is still available in 8, 16 and 24 GB variants and offers the same 100 GB/s maximum bandwidth (unlike the Pro models that feature a reduced memory bandwidth). 

The integrated 16-core Neural Engine has also been revised and now offers 18 TOPS peak performance (versus 15.8 TOPS in the M2 but 35 TOPS in the new A17 Pro). The video engine now supports AV1 decoding in hardware. H.264, HEVC and ProRes (RAW) can still be decoded and encoded.

Unfortunately, the integrated wireless network module only supports Wi-Fi 6E (no Wi-Fi 7) and due to the support of only a single external monitor, the chip also has to make do with no Thunderbolt 4 (Thunderbolt 3 / USB 4 support only for up to 40 Gbit/s).

The chip is manufactured on the current 3nm TSMC process (N3B most likely) and contains 25 billion transistors (+25% vs. Apple M2). The 3nm process should also contribute to the excellent efficiency of the chip. Under load, the M3 CPU consumes approximately 20 Watt.