Dell Inspiron 16 Plus 7640 16" Intel Core Ultra 7 155H 1.4GHz / 16GB RAM / 1TB SSD specifications and in-depth review

Dell Inspiron 16 Plus 7640 16" Intel Core Ultra 7 155H 1.4GHz / 16GB RAM / 1TB SSD

Manufacturer: Dell

The Dell Inspiron 16 Plus 7640 is a 16-inch laptop built around Intel's Core Ultra 7 155H processor, offering a 22-thread configuration with a turbo clock speed reaching 4.8GHz. The machine ships with 16GB of DDR5 RAM running at 6400MHz, paired with a 1TB NVMe SSD for storage, and sits within a chassis measuring 356mm wide, 250mm deep, and just 16mm thick, weighing in at approximately 1,900 grams.

The display covers a 16-inch panel at 2560x1600 resolution, delivering a pixel density of 188ppi alongside a 120Hz refresh rate and a 1200:1 contrast ratio, with 300 nits of typical brightness and an anti-reflection coating included. Connectivity options include one Thunderbolt 4 port, one USB 4 40Gbps port, two USB 3.2 Gen 1 Type-A ports, an HDMI 1.4 output, and Wi-Fi 6E support. Graphics are handled by the integrated Intel Arc Xe-LPG 128EU GPU, which carries a turbo clock of 2250MHz and supports DirectX 12 Ultimate, while the system logs a PassMark multi-core score of 24,879.

Pros
  • The 2560x1600 display with a 120Hz refresh rate and anti-reflection coating provides a sharp, smooth visual experience for a 16-inch screen
  • A Thunderbolt 4 port combined with a USB 4 40Gbps port offers high-bandwidth connectivity for fast external devices and displays
  • Wi-Fi 6E support ensures the laptop can take advantage of the latest wireless networking standards
  • Dolby Atmos-enabled stereo speakers paired with a 3.5mm audio jack give flexible audio output options
  • The 16mm thin chassis and 1,900g weight keep the machine relatively portable for its screen size
  • Support for up to four simultaneous external displays adds useful flexibility for multi-monitor setups
Cons
  • The display brightness is rated at only 300 nits, which may be limiting in well-lit environments
  • Maximum supported memory is capped at 16GB with no room for future upgrades beyond that ceiling
  • There is no RJ45 ethernet port, meaning wired network connections require an adapter
  • HDMI output is limited to version 1.4, restricting bandwidth for high-refresh-rate or high-resolution external displays
  • The laptop lacks a fingerprint scanner and 3D facial recognition, leaving the backlit keyboard as the primary input security method
  • The 1-year warranty period is relatively short for a device in this category
Who is this for?

This laptop suits users who need a capable daily driver for productivity and content consumption, with its 2560x1600 display at 120Hz making it a solid choice for document work, media playback, and light creative tasks. The 22-thread CPU with a 4.8GHz turbo clock and 1TB NVMe SSD also make it a reasonable fit for users handling moderately demanding workloads such as video editing at standard resolutions or running multiple applications simultaneously. Those who occasionally connect to external monitors will appreciate the ability to drive up to four displays, and the inclusion of Thunderbolt 4 and Wi-Fi 6E makes it well-suited to users who work across modern, high-bandwidth peripherals and networks.

Who is this NOT for?

Users with intensive graphics demands — such as those working in 3D rendering, high-end video production, or gaming — will find the integrated Arc Xe-LPG GPU insufficient for those workloads. The 16GB memory ceiling with no upgrade path makes this a poor fit for professionals running memory-hungry applications like large virtual machines or complex data processing pipelines. Additionally, the absence of an RJ45 port and the HDMI 1.4 output make it a less practical choice for users who rely on wired ethernet or need to drive high-resolution external displays at high refresh rates without additional adapters. Those working frequently in bright outdoor environments may also find the 300-nit display brightness inadequate.

Design:

weight 1900 g
Uses a fanless design
Has a backlit keyboard
warranty period 1 years
volume 1424 cm³
width 356 mm
height 250 mm
thickness 16 mm
is weather-sealed (splashproof)

The Dell Inspiron 16 Plus 7640 has a physical footprint of 356mm wide by 250mm deep, with a 16mm thickness and a total volume of 1,424 cm³, keeping its overall bulk reasonably contained for a 16-inch machine. It weighs 1,900 grams and does not use a fanless design, meaning active cooling is present. The keyboard includes backlighting, while the chassis carries no weather-sealing or splashproof protection. Dell covers the laptop with a 1-year warranty.

Display:

screen size 16"
resolution 2560 x 1600 px
pixel density 188 ppi
has a touch screen
brightness (typical) 300 nits
refresh rate 120Hz
contrast ratio 1200:1
has anti-reflection coating
supported displays 4

The laptop features a 16-inch screen with a 2560x1600 resolution at 188ppi, delivering a reasonably sharp image across its panel. The display runs at a 120Hz refresh rate and offers a 1200:1 contrast ratio alongside 300 nits of typical brightness. An anti-reflection coating is applied to the surface, though the panel does not support touch input. The system is capable of driving up to four external displays simultaneously.

Performance:

RAM 16GB
RAM speed 6400 MHz
Uses flash storage
internal storage 1024GB
CPU speed 6 x 1.4 & 8 x 0.9 GHz
CPU threads 22 threads
Is an NVMe SSD
DirectX version DirectX 12 Ultimate
GPU clock speed 300 MHz
uses multithreading
maximum memory amount 16GB
DDR memory version 5
turbo clock speed 4.8GHz
GPU turbo 2250 MHz
memory slots 2
PCI Express (PCIe) version 5
semiconductor size 7 nm
Supports 64-bit

The processor runs across 14 cores — six performance cores at 1.4GHz and eight efficiency cores at 0.9GHz — totaling 22 threads, with a turbo clock that reaches 4.8GHz; notably, hardware-level multithreading is not supported. The chip is built on a 7nm process, supports 64-bit operation, and connects to storage via a PCIe 5 interface. Storage consists of a 1024GB NVMe SSD, and the system carries 16GB of DDR5 RAM running at 6400MHz across two memory slots, with 16GB also representing the maximum supported memory capacity. The integrated GPU has a base clock of 300MHz and a turbo of 2250MHz, with support for DirectX 12 Ultimate.

Benchmarks:

PassMark result 24879
PassMark result (single) 3468

In PassMark testing, the system achieves a multi-core score of 24,879, reflecting the combined throughput of its 14-core processor across all available threads. The single-core result of 3,468 indicates the per-core processing capability of the CPU in lightly threaded workloads.

Connectivity:

USB 3.2 Gen 2 ports (USB-C) 0
USB 3.2 Gen 2 ports (USB-A) 0
USB 4 20Gbps ports 0
USB 4 40Gbps ports 1
Thunderbolt 4 ports 1
USB 3.2 Gen 1 ports (USB-C) 0
USB 3.2 Gen 1 ports (USB-A) 2
Thunderbolt 3 ports 0
has an HDMI output
Has USB Type-C
supports Wi-Fi
Wi-Fi version Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
has an external memory slot
RJ45 ports 0
HDMI ports 1
HDMI version HDMI 1.4
DisplayPort outputs 0
has AirPlay
mini DisplayPort outputs 0
has a VGA connector

The laptop includes one Thunderbolt 4 port and one USB 4 40Gbps port for high-speed connectivity, alongside two USB 3.2 Gen 1 Type-A ports for standard peripherals; there are no USB 3.2 Gen 2 ports, no DisplayPort or mini DisplayPort outputs, and no RJ45 ethernet port. Video output is handled through a single HDMI 1.4 port, and a Type-C connector is present on the chassis. Wireless connectivity covers Wi-Fi 6E, Wi-Fi 6, Wi-Fi 5, and Wi-Fi 4 standards, and the machine also supports AirPlay. An external memory card slot is included, rounding out the available connectivity options.

Battery:

Has sleep-and-charge USB ports
Has a MagSafe power adapter

The laptop supports sleep-and-charge USB ports, allowing connected devices to be charged even when the system is powered off or in sleep mode. It does not use a MagSafe power adapter.

Features:

has stereo speakers
has a socket for a 3.5 mm audio jack
megapixels (front camera) 2.07MP
has Dolby Atmos
Stylus included
Has a fingerprint scanner
number of microphones 2
Uses 3D facial recognition
has voice commands
has a front camera
Has S/PDIF Out port
has a gyroscope
has GPS
has an accelerometer
has a compass
Has an optical disc drive

Audio is handled through stereo speakers with Dolby Atmos support, and a 3.5mm headset jack is available for wired headphones or headsets; there is no S/PDIF output. The laptop has a front-facing 2.07MP camera paired with a dual-microphone setup, though it lacks 3D facial recognition, a fingerprint scanner, and voice command support. No stylus is included in the box. The device does not feature a gyroscope, accelerometer, compass, or GPS, and there is no optical disc drive.

Miscellaneous:

clock multiplier 38
PassMark result (overclocked) 24880
shading units 1024
render output units (ROPs) 32
texture mapping units (TMUs) 64
GPU name Arc Xe-LPG 128EU
CPU socket BGA 2049
Type Laptop
Has an unlocked multiplier
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
L3 cache 24 MB
Has NX bit
CPU temperature 110 °C
OpenCL version 3
OpenGL version 4.6
GPU execution units 8
Has integrated graphics
Supports ECC memory
memory channels 2
RAM speed (max) 7467 MHz
Thermal Design Power (TDP) 28W
Uses big.LITTLE technology

The CPU uses a BGA 2049 socket, operates with a clock multiplier of 38, and has a thermal design power of 28W, with a maximum rated temperature of 110°C; the multiplier is locked. It employs big.LITTLE technology to distribute workloads across its core types, supports the NX bit for hardware-level security, and carries a 24MB L3 cache. Supported instruction sets include MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2. Memory runs across two channels with a maximum supported speed of 7467MHz, though ECC memory is not supported. The integrated Intel Arc Xe-LPG 128EU GPU features 1,024 shading units, 64 texture mapping units, 32 ROPs, and 8 execution units, with OpenCL 3 and OpenGL 4.6 support. The overclocked PassMark result is recorded at 24,880.

Final Verdict

The Dell Inspiron 16 Plus 7640 presents a well-rounded package for users seeking a capable 16-inch laptop for everyday productivity and moderate workloads. Its 2560x1600 120Hz display paired with a 22-thread Intel Core Ultra 7 155H processor and fast NVMe storage give it solid footing for multitasking, content work, and general professional use. That said, the fixed 16GB memory ceiling, integrated-only graphics, and a few connectivity limitations mean it is best positioned for mainstream users rather than those with specialized or demanding computing needs. For the right user profile, it delivers a coherent and practical set of specifications without obvious weak points in its intended use range.

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