Dell Inspiron 16 5645 (2025) 16" specifications and in-depth review

Dell Inspiron 16 5645 (2025) 16"

Manufacturer: Dell

The Dell Inspiron 16 5645 (2025) is a 16″ productivity laptop built around a capable AMD Ryzen processor and a touchscreen display, making it a well-rounded option for users who need both performance and everyday versatility. Weighing in at 1868 g and measuring just 19 mm thick, the machine balances portability with a full-sized form factor, and its backlit keyboard adds a layer of convenience for low-light use. The Radeon 780M integrated GPU handles display output across up to four screens, which broadens its usefulness for multi-monitor setups.

On the technical side, the Inspiron 16 5645 ships with 64GB of DDR5 RAM running at up to 7500 MHz across two memory channels, paired with a 2048GB NVMe PCIe 4 SSD for fast, high-capacity storage. The 8-core CPU operates at a base clock of 3.3 GHz with a turbo speed reaching 5.1 GHz, and its 16-thread configuration is backed by a 16 MB L3 cache and a 28W TDP. Benchmark results include a Geekbench 6 multi-core score of 9332 and a PassMark result of 23339. Connectivity is handled by Wi-Fi 6, Bluetooth 5.3, three USB 3.2 Gen 1 Type-A ports, and an external memory card slot, while the 1920 x 1200 px display delivers a pixel density of 141 ppi at a 60 Hz refresh rate. Battery life is rated at 14 hours, and a fingerprint scanner is included for biometric authentication.

Pros
  • 64GB of DDR5 RAM with support for up to 256GB makes the system well-suited for memory-intensive workloads
  • The 2048GB NVMe PCIe 4 SSD provides fast storage access alongside generous built-in capacity
  • A rated battery life of 14 hours reduces dependence on a power outlet during extended use
  • The touchscreen display supports up to four simultaneous external monitors, adding flexibility for multi-display setups
  • A fingerprint scanner enables convenient and quick biometric login
  • The backlit keyboard allows comfortable use in low-light environments
Cons
  • No USB Type-C port limits compatibility with modern peripherals and accessories
  • Absence of an RJ45 Ethernet port means wired network connections are not possible
  • The 60 Hz display refresh rate is on the lower end for a 16-inch productivity laptop
  • No anti-reflection coating on the display may cause visibility issues under bright or direct lighting
  • A single microphone provides limited audio capture quality for conferencing or recording tasks
  • The GPU does not support ray tracing or DLSS, restricting graphical capability for more demanding visual workloads
Who is this for?

This laptop is well-matched for professionals and power users who handle memory-intensive workloads such as data analysis, software development, or content creation, given its 64GB of DDR5 RAM and 2048GB NVMe SSD. The 14-hour rated battery life makes it a practical choice for users who work away from a desk for extended periods, while the ability to drive up to four simultaneous displays suits those who rely on multi-monitor setups for productivity. The touchscreen and fingerprint scanner add further convenience for everyday business use, and the backlit keyboard makes it functional in varied lighting conditions.

Who is this NOT for?

Users looking for a machine capable of handling graphically demanding tasks such as gaming or real-time 3D rendering will find the integrated Radeon 780M limiting, particularly given the absence of ray tracing and DLSS support. The 60 Hz display and lack of anti-reflection coating make it a poor fit for those who prioritize smooth visual output or outdoor use in bright environments. Additionally, users who depend on modern wired connectivity — such as USB Type-C devices or a direct Ethernet connection — will encounter gaps, as neither USB Type-C nor an RJ45 port is available on this machine.

Design:

Type Productivity
weight 1868 g
Uses a fanless design
Has a backlit keyboard
volume 1684.236 cm³
width 356 mm
height 249 mm
thickness 19 mm
is weather-sealed (splashproof)
has a rugged build

The Dell Inspiron 16 5645 (2025) is classified as a productivity laptop with dimensions of 356 mm wide, 249 mm deep, and 19 mm thick, giving it a relatively slim profile for its class. It weighs 1868 g and occupies a total volume of 1684.236 cm³, making it manageable for daily transport despite its 16″ form factor. The machine includes a backlit keyboard for use in low-light environments, though it does not feature a fanless design, a weather-sealed enclosure, or a rugged build.

Display:

screen size 16"
resolution 1920 x 1200 px
pixel density 141 ppi
has a touch screen
refresh rate 60Hz
has anti-reflection coating
supported displays 4

The laptop features a 16″ touchscreen display with a resolution of 1920 x 1200 px and a pixel density of 141 ppi, offering a slightly taller aspect ratio that provides a bit of extra vertical screen space. The panel runs at a 60 Hz refresh rate and does not include an anti-reflection coating. Through its GPU, the system can drive up to 4 displays simultaneously, making it a viable option for users who rely on extended multi-monitor configurations.

Performance:

RAM 64GB
Uses flash storage
internal storage 2048GB
CPU speed 8 x 3.3 GHz
CPU threads 16 threads
Is an NVMe SSD
DirectX version DirectX 12
GPU clock speed 800 MHz
uses multithreading
maximum memory amount 256GB
DDR memory version 5
turbo clock speed 5.1GHz
GPU turbo 2700 MHz
PCI Express (PCIe) version 4
semiconductor size 4 nm
has XeSS (XMX)
Supports 64-bit

The system is powered by an 8-core, 16-thread 64-bit processor built on a 4 nm semiconductor process, running at a base clock of 3.3 GHz with a turbo frequency reaching 5.1 GHz, and it supports multithreading for handling parallel workloads more efficiently. It comes equipped with 64GB of DDR5 RAM, expandable up to 256GB, alongside a 2048GB NVMe SSD connected via PCIe 4, providing fast flash-based storage with ample capacity. The integrated GPU operates at a base clock of 800 MHz and boosts up to 2700 MHz, with support for DirectX 12, though it does not include XeSS acceleration. All components run in a fully 64-bit environment, rounding out a performance configuration suited to demanding productivity tasks.

Benchmarks:

Geekbench 6 result (multi) 9332
Geekbench 6 result (single) 2188
PassMark result 23339
PassMark result (single) 3538

In standardized benchmark testing, the laptop recorded a Geekbench 6 multi-core score of 9332 and a single-core score of 2188, reflecting the processor's capability across both parallel and sequential workloads. On the PassMark suite, it achieved an overall score of 23339 alongside a single-thread PassMark result of 3538, providing a broader picture of sustained and per-core computational throughput.

Connectivity:

USB 4 20Gbps ports 0
USB 4 40Gbps ports 0
Thunderbolt 4 ports 0
USB 3.2 Gen 1 ports (USB-A) 3
Thunderbolt 3 ports 0
Has USB Type-C
supports Wi-Fi
Wi-Fi version Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
has an external memory slot
Bluetooth version 5.3
RJ45 ports 0
DisplayPort outputs 0
has AirPlay
mini DisplayPort outputs 0
has a VGA connector

Wired connectivity is handled by three USB 3.2 Gen 1 Type-A ports, while the laptop does not include USB Type-C, Thunderbolt 3 or 4, USB 4, a RJ45 Ethernet port, a VGA connector, or any DisplayPort or mini DisplayPort outputs. On the wireless side, it supports Wi-Fi 6 (802.11ax) along with backward-compatible Wi-Fi 5 and Wi-Fi 4 standards, and pairs that with Bluetooth 5.3 for peripheral connectivity. An external memory card slot is also present for removable storage, and the system includes AirPlay support for wireless content streaming.

Battery:

Battery life 14 hours
Has sleep-and-charge USB ports
Has a MagSafe power adapter

The laptop is rated for 14 hours of battery life, offering a reasonable amount of untethered use for a productivity-class machine. It does not include sleep-and-charge USB ports, so connected devices will only charge when the system is powered on, and it does not use a MagSafe power adapter.

Features:

has stereo speakers
has a socket for a 3.5 mm audio jack
supports ray tracing
supports DLSS
has Dolby Atmos
Stylus included
Has a fingerprint scanner
number of microphones 1
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

The laptop includes stereo speakers, a 3.5 mm headset jack, and a front camera, covering the essentials for audio playback and video calls, while a single built-in microphone handles voice input. A fingerprint scanner is present for biometric login, though the machine does not support 3D facial recognition or voice commands. On the audio side, there is no Dolby Atmos or S/PDIF output, and no stylus is included despite the touchscreen display. The device also lacks an optical disc drive, GPS, gyroscope, accelerometer, and compass, and its GPU does not support ray tracing or DLSS.

Miscellaneous:

clock multiplier 33
PassMark result (overclocked) 23956
GPU name Radeon 780M
Type Laptop
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Uses big.LITTLE technology
Has an unlocked multiplier
Has NX bit
L3 core 2 MB/core
L3 cache 16 MB
L2 core 1 MB/core
L2 cache 8 MB
L1 cache 512 KB
render output units (ROPs) 32
texture mapping units (TMUs) 48
shading units 768
GPU execution units 12
OpenCL version 2.1
OpenGL version 4.6
Has integrated graphics
Supports ECC memory
memory channels 2
RAM speed (max) 7500 MHz
CPU temperature 100 °C
Thermal Design Power (TDP) 28W

The laptop CPU is a laptop-class processor with a clock multiplier of 33 and a thermal design power of 28W, with a maximum operating temperature of 100 °C. Its multiplier is locked and it does not use big.LITTLE technology, though it does carry the NX bit for hardware-level security. The processor supports a broad set of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, and memory runs across two channels at up to 7500 MHz, with ECC memory not supported. Cache is structured at 512 KB L1, 8 MB L2 at 1 MB per core, and 16 MB L3 at 2 MB per core. The integrated Radeon 780M GPU features 12 execution units, 768 shading units, 48 texture mapping units, and 32 render output units, with support for OpenCL 2.1 and OpenGL 4.6. An overclocked PassMark result of 23956 rounds out the available performance data for this configuration.

Final Verdict

The Dell Inspiron 16 5645 (2025) presents a well-rounded configuration for productivity-focused users who prioritize memory capacity, storage speed, and all-day battery endurance. Its 64GB of DDR5 RAM paired with a 2048GB NVMe SSD positions it as a capable machine for demanding everyday workloads, and the 14-hour battery rating adds genuine practical value for users on the move. That said, the integrated GPU, 60 Hz display, and limited wired connectivity options mean it falls short for users with more specialized needs in graphics performance or modern port compatibility. For professionals seeking a reliable, high-memory productivity laptop with a solid feature set and flexible multi-display support, the Inspiron 16 5645 makes a coherent and well-specified choice.