The Dynabook Portege Z40L-N 14″ has a notably slim and light build, measuring 312mm wide, 222mm deep, and just 18mm thick, with a total volume of 1246.752 cm³ and a weight of 959 grams. It includes a backlit keyboard for use in low-light conditions and comes with a three-year warranty. The laptop does not use a fanless design, and it is neither weather-sealed nor built to a rugged standard.
The laptop features a 14-inch screen with a 1920x1200 pixel resolution at a density of 161 ppi and a 60Hz refresh rate. It can drive up to three displays simultaneously, making it capable of supporting an expanded multi-monitor setup. The panel does not include touch input or an anti-reflection coating.
The processor runs eight threads across cores clocked at 2.2 GHz, with a turbo boost reaching 4.8GHz, and is built on a 3nm semiconductor process with 64-bit and multithreading support. The system comes with 32GB of DDR5 RAM — the maximum supported — while storage is handled by a 512GB NVMe SSD connected via PCIe 5, using flash-based technology for fast data access. The integrated GPU runs at a base clock of 600 MHz and boosts up to 1950 MHz, supporting DirectX 12 Ultimate but not XeSS (XMX) acceleration.
In PassMark testing, the system achieves a multi-core score of 19,096 alongside a single-core score of 4,038, providing a measurable indication of both parallel processing throughput and per-core computational performance.
The laptop offers a well-rounded port selection, headlined by two Thunderbolt 4 ports that also function as USB 4 40Gbps connections, alongside two USB 3.2 Gen 1 Type-A ports — there are no USB 2.0, USB 3.2 Gen 2, or DisplayPort outputs of any kind. Video output is handled through a single HDMI port, and wired networking is available via one RJ45 port. On the wireless side, the machine supports Wi-Fi 7 (802.11be) along with Wi-Fi 6E, 6, 5, and 4, and it also includes AirPlay support. An external memory slot adds further flexibility for storage expansion, and there is no VGA connector present.
The laptop is equipped with a 56 Wh battery and supports sleep-and-charge functionality, allowing connected USB devices to be charged even when the system is powered off or in sleep mode. It does not include a MagSafe power adapter.
For audio, the laptop includes stereo speakers with Dolby Atmos support and a 3.5mm headset jack, while two built-in microphones handle voice input. The front camera captures at 5MP and is paired with 3D facial recognition for biometric login, complemented by a fingerprint scanner for an additional authentication option. Motion and location sensors — including a gyroscope, accelerometer, compass, and GPS — are not present, and there is no S/PDIF output, no optical disc drive, and no stylus included. Ray tracing and DLSS are also not supported.
The laptop-class CPU operates with a clock multiplier of 22, a TDP of 17W, and a maximum temperature rating of 100°C, employing big.LITTLE technology for efficiency-aware workload distribution. It supports a broad set of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, carries 12MB of L3 cache, and includes NX bit support for hardware-level security — though the multiplier is locked, ruling out manual overclocking. Memory runs across two channels at up to 8533 MHz with a peak bandwidth of 136 GB/s, and ECC memory is not supported. Graphics are handled by the integrated Arc Graphics 140V, which features 8 execution units and 1024 shading units, with OpenCL 3 and OpenGL 4.6 support. An overclocked PassMark result of 20,403 is also recorded for this configuration.
