HP OmniBook 5 16 vs Dell Inspiron 16 5645 Comparison

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HP OmniBook 5 16

16 inches | March 2025

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Dell Inspiron 16 5645

16 inches | April 2024

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HP OmniBook 5 16 vs Dell Inspiron 16 5645 Comparison Overview

HP OmniBook 5 16

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Dell Inspiron 16 564...

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HP OmniBook 5 16

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Dell Inspiron 16 564...

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In this review, we will be comparing OmniBook 5 16 and Inspiron 16 5645, two laptops from HP and Dell. HP OmniBook 5 16 was introduced to market in March 2025 and Dell Inspiron 16 5645 was launched in April 2024. There is only 11 months difference between OmniBook 5 16 and Inspiron 16 5645 so we are expecting this to be a fair comparison regarding age and technology level.

Click for Available Configurations of the Laptops

Here is a brief look at the main features of HP OmniBook 5 16 and Dell Inspiron 16 5645 before getting into our more detailed comparison.

HP OmniBook 5 16 Key Specs

Launched in March 2025
16.0" IPS LCD, 16:10 Aspect Ratio Display
CPU: Intel Core Ultra 5 225U,Intel Core Ultra 7 255U,AMD Ryzen AI 5 340,AMD Ryzen AI 7 350,AMD Ryzen 5 8540U
GPU: Intel Arc iGPU (4-Cores)
16GB,24GB,32GB Ram
357.7 x 254.8 x 17.9 mm (14.08 x 10.03 x 0.7 inches)
Weight: 1.79 kg (3.95 lbs)

Dell Inspiron 16 5645 Key Specs

Launched in April 2024
16.0" IPS LCD, 16:10 Aspect Ratio Display
CPU: AMD Ryzen 5 8540U
GPU: Radeon 740M
8GB Ram
356.78 x 249.52 x 16.18-19.05 mm (14.05 x 9.82 x 0.64-0.75 inches)
Weight: 1.87 kg (4.12 lbs)

Let's read on the following sections in order to better understand in detail how OmniBook 5 16 and Inspiron 16 5645 compares and decide which one is better for you.

**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Reasons to choose HP OmniBook 5 16 over Dell Inspiron 16 5645

Weight	1.79 kg vs 1.87 kg	0.08 kg lighter
CPU Fabrication Process	3 nm vs 4 nm	Newer Generation CPU
Bluetooth	v5.4 vs v5.3	More advanced Bluetooth connectivity
Number of USB-C Ports	2x USB 4.0 vs 1x USB 3.2	Connect more device at the same time
USB-C Port Type	v4.0 vs v3.2	Faster USB-C connection
HDMI Version	2.1 vs 1.4	Better HDMI connectivity

Reasons to choose Dell Inspiron 16 5645 over HP OmniBook 5 16

Screen-to-Body Ratio	~83.4% vs ~81.4%	Larger screen area ratio
Side Bezel Thickness	6.1 mm vs 6.5 mm	0.4 mm thinner bezels
sRGB Color Space	100% vs 62.5%	Wider sRGB Color Space Coverage
GPU Fabrication Process	4 nm vs 5 nm	Newer Generation GPU
GPU FLOPS	2.56 TFLOPS vs 2 TFLOPS	More RAM Options
Upgradable RAM	Yes vs No	3D Surround Sound Support
Dolby Atmos Speakers	Yes vs No	Read & Write SD Cards with the built-in reader
SD Card Reader	Yes vs No

Common Strengths of Dell Inspiron 16 5645 and HP OmniBook 5 16

Launch Dates	March 2025 vs April 2024	Both laptops are recent models
Screen Coating	Matte vs Matte	Less reflections on the screen
Fast Charging Support	Yes vs Yes	Charge the battery in a shorter time
RAM Type	PCI-E Gen 4.0 (4x) vs PCI-E Gen 4.0 (4x)	Fast RAM type
Upgradable Storage	Yes vs Yes	Option to increase the Storage size
SSD Type	NVMe vs NVMe	Faster Data Transfers
Wi-Fi Standard	v6E vs v6E	Fast and Reliable Wi-Fi Connections
HDMI Output	1x HDMI 2.1 vs 1x HDMI 2.1	Connect to External Displays via HDMI cable
VGA Output	No vs No	Connect to External Displays via VGA cable
Numeric Pad	Yes vs Yes	Fast way to input numbers
Keyboard Backlight	Yes vs Yes	Easily see the keys under low light

Common Weaknesses of Dell Inspiron 16 5645 and HP OmniBook 5 16

Touchscreen Capability	No vs No	No Touchscreen Capability
HDR Support	No vs No	No HDR Support

HP OmniBook 5 16 vs Dell Inspiron 16 5645: Physical Specs Comparison

In this section, we will be comparing the physical specifications and body features of the HP OmniBook 5 16 and the Dell Inspiron 16 5645.

Physical Specs
Weight	1.79 kg (3.95 lbs)	1.87 kg (4.12 lbs)
Surface Area	911 cm2 (141.2 inches2)	890 cm2 (138 inches2)
Screen to Surface Ratio	~81.4%	~83.4%
Side Bezel Thickness	~6.5 mm	~6.1 mm
Weight per Inch of Screen	0.11 kg/inch	0.12 kg/inch
	0.242 lbs/inch	0.264 lbs/inch
Colors	Silver	Blue

Comparison of the HP OmniBook 5 16 and the Dell Inspiron 16 5645 External Dimensions

Weight

OmniBook 5 16 weighs 1.79 kg (3.95 lbs), whereas the Inspiron 16 5645 weighs 1.87 kg (4.12 lbs). There is a notable difference in weight between these two laptops. The weight difference between the two laptops is not significant.

Weight Comparison

Displays size 16.0-16.9 inches

HP OmniBook 5 16 1.79 kg

Dell Inspiron 16 5645 1.87 kg

Min 1.17 kg

Average 2.07 kg

Max 3.00 kg

Thickness Comparison

Displays size 16.0-16.9 inches

HP OmniBook 5 16 17.90 mm

Dell Inspiron 16 5645 19.05 mm

Min 12.30 mm

Average 20.35 mm

Max 30.80 mm

Another value that we use for comparing the weights of the laptops is the Weight per Inch of Screen, which is calculated by dividing the total weight of the model with its usable diagonal screen size. This value for the HP OmniBook 5 16 is 0.11 kg/inch.In comparison, this value for the Dell Inspiron 16 5645 is 0.12 kg/inch.Here are some of the best performing laptops in this area:

Microsoft Surface Go 4: 0.05 kg/inch
LG Gram SuperSlim 15.6 2023: 0.06 kg/inch
Asus ProArt PZ13 HT5306: 0.06 kg/inch
Asus Zenbook A14 UX3407: 0.06 kg/inch
Microsoft Surface Pro 12: 0.06 kg/inch
Dell Latitude 7330: 0.07 kg/inch
Lenovo ThinkPad X1 Nano Gen 2: 0.07 kg/inch
LG Gram 14 2022: 0.07 kg/inch

HP OmniBook 5 16 vs Dell Inspiron 16 5645: Internals (CPU, GPU, RAM, Battery, SSD, etc.) Comparison

CPU Comparison

CPU Model	Intel Core Ultra 5 225U Intel Core Ultra 7 255U AMD Ryzen AI 5 340 AMD Ryzen AI 7 350 AMD Ryzen 5 8540U	AMD Ryzen 5 8540U AMD Ryzen 7 8840U
Base Frequency	1.5 GHz	3.2 GHz
Turbo Frequency	4.8 GHz	4.9 GHz
Number of Cores	Arc Graphics (4-	6
Number of Threads	14	12
L3 Cache	12 MB	16 MB
Integrated GPU	Arc Graphics (4-Cores)	Radeon 740M
CPU Fabrication Process	3 nm	4 nm

Above you can see the CPU options and the CineBench and GeekBench test scores for both laptops, which gives an idea about what kind of performance difference you may experience between the HP OmniBook 5 16 and Dell Inspiron 16 5645.

You may also read reviews of latest laptops with the same CPU ( AMD Ryzen 5 8540U ) and compare them:

GPU Comparison

GPU Model	Intel Arc iGPU (4-Cores)	Radeon 740M
Base Clock Frequency	300 MHz	800 MHz
Boost CLock Frequency	2000 MHz	2500 MHz
TGP (Total Graphics Power)	14 W	15 W
Type	Integrated	Integrated
FLOPS	2 TFLOPS	2.56 TFLOPS
Memory Size	System Shared	System Shared
Memory Type	LPDDR5X	DDR5
Memory Speed	7.47 Gbps	5.6 Gbps
Shading Units Cores	512	256
TMUs	32	16
ROPs	16	8

GPU is as critical as the CPU for graphic heavy applications and the table above gives a picture of how the two GPU compares. FLOPS is a measure of a GPU's performance based on the number of floating-point arithmetic calculations that the processor can perform within a second. HP OmniBook 5 16 has a FLOPS value of 2 TFLOPS whereas the Dell Inspiron 16 5645 ' has a FLOPS value of 2.56 TFLOPS. If graphical performance of the laptop is important for your use type, the Dell Inspiron 16 5645 may be the better choice between these two setups.

RAM Comparison

RAM	16GB 24GB 32GB	8GB 16GB 32GB
Memory Bus	2x8 GB	1x8 GB
RAM Clock	7467 MHz	5600 MHz
RAM Type	LPDDR5X	DDR5
Upgradable	No	Yes
Memory Bus	PCI-E Gen 4.0 (4x)	PCI-E Gen 4.0 (4x)

With a larger RAM capacity of 16 GB, the OmniBook 5 16 offers an advantage for multitasking and resource-intensive applications compared to the Inspiron 16 5645's RAM capacity of 8 GB.

LOCAL LLM Compatibility Evaluation

This quick guide shows what types of large language models (LLMs) each of these laptops could support, based on their respective hardware specifications. It's meant to help you compare their suitability for running AI models locally.

LLM Category	HP OmniBook 5 16"	Dell Inspiron 16 5645
Small Models(1-3B):Examples: Phi-2, Qwen-1.8B	✔ Run smoothly.	✔ Run smoothly.
Medium Models(7-8B):Examples: Mistral-7B, Qwen-7B	✔ Good performance.	✖ Not supported.
Large Models(13-30B):Examples: Mixtral, Qwen-14B	⚠ Can run slowly on CPU with enough RAM and good iGPU.	✖ Not supported.
Extra-Large Models(65B+):Examples: LLaMA2-70B, Qwen1.5-72B	✖ Not supported on most systems. Requires high-end GPU or advanced setup.	✖ Not supported on most systems. Requires high-end GPU or advanced setup.

Note: Optimized (e.g., 4-bit) models may run on limited hardware. Performance depends on runtime and setup.

📌 MoE Models: Some models like Mixtral 8x7B and Qwen3-30B-A3B use a Mixture of Experts (MoE) design, activating only part of the model during inference. This means they can often run efficiently on laptops with 12–16 GB of VRAM when quantized.

BATTERY

BATTERY	59 Wh	54 Wh 64 Wh
Battery Type	Li-Po	Li-Po
Replaceable	No	No
Fast Charging	No	Yes
Charging Port Position	Left	Left
Charge Power	65 W	65 W

Moreover, the OmniBook 5 16 boasts a larger battery capacity of 59 Wh, offering extended usage time compared to the Inspiron 16 5645's54 Wh.

Battery Comparison

Displays size 16.0-16.9 inches

HP OmniBook 5 16 59 Wh

Dell Inspiron 16 5645 54 Wh

Min 38.00 Wh

Average 74.15 Wh

Max 100.00 Wh

STORAGE
With a larger storage capacity up to 2 TB, the OmniBook 5 16 provides more space for storing files and applications compared to the Inspiron 16 5645's max. storage capacity of 1 TB.

Storage Options	512 GB, 1 TB, 2 TB	256 GB, 512 GB, 1 TB
Upgradable	Yes	Yes
Total Slots	1	1
Storage type	SSD (M2)	SSD (M2)
NVMe	Yes	Yes

If your budget allows, we recommend opting for the largest possible disk size, considering the potential increase in storage capacity needs in the future. However, please keep in mind the question 'What will the laptop be used for?' when making this decision. Of course, you can later upgrade the hard disk capacity by getting a larger disk. However, if your laptop has only one disk slot, it may not be as straightforward as a RAM upgrade, where you simply add or replace a module, as moving or cloning files to a new disk may be necessary.

HP OmniBook 5 16 vs Dell Inspiron 16 5645: Display Comparison

The display is an essential aspect to consider when comparing the HP OmniBook 5 16 and Dell Inspiron 16 5645 since its is the component that you interact the most and significantly impact the experience.

Screen Area and Dimensions

Now let's look at the comparison of the actual display areas of both laptops below, keeping the bezels around the screens out of the equation. Both OmniBook 5 16 and Inspiron 16 5645 screens have the same size of 16.0".The total usable screen area of the OmniBook 5 16 is 742cm² / 115inch² whereas the Inspiron 16 5645's total usable screen area is 742cm² / 115inch².

PPI (Pixels per Inch)
Both OmniBook 5 16 and Inspiron 16 5645 feature the same pixel density with 142 pixels per inch (PPI).

Screen PPI (Pixels Per Inch) Comparison

Displays size 16.0-16.9 inches

HP OmniBook 5 16 142 ppi

Dell Inspiron 16 5645 142 ppi

Min 137 PPI

Average 169 PPI

Max 283.00 PPI

Refresh Rate
Both OmniBook 5 16 and Inspiron 16 5645 offer the same refresh rate of 60 Hz.

Brightness
Both OmniBook 5 16 and Inspiron 16 5645 offer the same maximum brightness of 300 nits (cd/m²).

Brightness Comparison

Displays size 16.0-16.9 inches

HP OmniBook 5 16 300 nits

Dell Inspiron 16 5645 300 nits

Min

40 nits

Average 413 nits

Max 1250.00 nits

HP OmniBook 5 16 vs Dell Inspiron 16 5645 Connectivity Comparison

In terms of connectivity,

Wifi
Both laptops offer the same Wi-Fi standard (v6E), ensuring fast and reliable wireless connections.

Below, you'll find a Wi-Fi Versions Table, along with their release dates and speeds, to provide a brief overview of its development.

Wi-Fi Versions and Speeds

Standard	Speed	Release Date	Network	Frequency Bands (GHz)
Wi-Fi 7	up to 40 Gbps (5 GB/s)	2023	802.11be	2.4, 5, 6
Wi-Fi 6E	up to 9.6 Gbps (1.2 GB/s)	2020	802.11ax	2.4, 5, 6
Wi-Fi 6	up to 9.6 Gbps (1.2 GB/s)	2019	802.11ax	2.4, 5
Wi-Fi 5	up to 6.93 Gbps (866.25 MB/s)	2014	802.11ac	2.4, 5
Wi-Fi 4	up to 600 Mbps (75 MB/s)	2009	802.11n	2.4, 5

* Please note that the provided transfer rates are maximum theoretical values, and real-life performance may vary based on environmental factors.

USB
Both OmniBook 5 16 and Inspiron 16 5645 feature 2x USB 3.2 USB-A ports.
Both OmniBook 5 16 and Inspiron 16 5645 have USB Type-C ports. OmniBook 5 16 has 2x USB 4.0 USB Type-C ports, while Inspiron 16 5645 has 1x USB 3.2 USB Type-C ports.

Below, you'll find a table of USB ports, along with their release dates and speeds.
To mitigate the confusion caused by generation names, the USB Implementers Forum (USB-IF) suggests using marketing names like USB 5Gbps, USB 10Gbps, and so forth, based on their respective transfer rates.

USB Type and Speeds

USB Type	Version	Speed	Date	Other Features/Explanations
USB4	Gen 4 (2.0)	80 Gbps	2022	Also known as USB 80Gbps
USB4	Gen 3×2	40 Gbps	2019	Also known as USB 40Gbps
USB 3.2	3.2 Gen 2x2	20 Gbps	2019	Double the data transfer rates of Gen 2
USB 3.2	3.2 Gen 2	10 Gbps	2017	Previously known as USB 3.1
USB 3.2	3.2 Gen 1	5 Gbps	2017	Previously known as USB 3.0
USB 3.1	3.1 Gen 2	10 Gbps	2013	Faster data transfer rates
USB 3.0	3.1 Gen 1	5 Gbps	2010	SuperSpeed USB, improved data transfer rates
USB 2.0	2.0	480 Mbps	2000	High-speed data transfer
USB 1.0	1.0	1.5 Mbps	1996	Original USB standard

Thunderbolt
Neither OmniBook 5 16 nor Inspiron 16 5645 has Thunderbolt port.

HDMI
Both OmniBook 5 16 and Inspiron 16 5645 feature an HDMI port. OmniBook 5 16 offers 1x HDMI 2.1, while Inspiron 16 5645 offers 1x HDMI 1.4.

Below, you'll find a comparison table detailing different HDMI versions, including their bandwidth, color depth, maximum resolution, and release dates. This information can be helpful in understanding the capabilities of each HDMI version and choosing the most suitable one for your needs.

HDMI Comparison Table

HDMI Version	Maximum Resolution	Bandwidth (Gbps)	Color Depth (bits)	Release Date
HDMI 2.1-2.1b	7680 x 4320 *(8K)* @ 60p 3840 x 2160 *(4K)* @ 120p	48.0	48	2017
HDMI 2.0-2.0b	3840 x 2160 *(4K)* @ 60p	18.0	48	2013
HDMI 1.4-1.4b	3840 x 2160 *(4K)* @ 30p	10.2	48	2009
HDMI 1.3-1.3a	2560 x 1440 @ 60p	10.2	48	2006
HDMI 1.0-1.2a	1920 x 1200 @ 60p	4.95	24	2002

* Please note that the provided resolution values represent the maximum supported resolution, and actual display quality may depend on other factors such as source content and connected devices.

SD Card Reader
Inspiron 16 5645 is equipped with an SD Card Reader for easy access to memory cards. OmniBook 5 16 does not have an SD Card Reader.

Audio Jack
Both OmniBook 5 16 and Inspiron 16 5645 are equipped with a 3.5mm Audio Jack, providing seamless connection to headphones and speakers.

To summarize the connectivity and ports details, please refer to the table below to see them listed.

Connectivity and Ports
WiFi Standard (latest: v7)	v6E	v6E
Bluetooth (latest: v5.4)	v5.4	v5.3
USB-A (latest: 3.2)	2x USB 3.2	2x USB 3.2
USB Type-C (latest: USB4 2.0)	2x USB 4.0	1x USB 3.2
Thunderbolt (latest: 5)	No	No
HDMI (latest: 2.1)	1x HDMI 2.1	1x HDMI 1.4
Display Port (latest: v2.0)	No	No
VGA	No	No
Fingerprint Sensor	No	Optional
Optical Drive	No	No
Audio Jack 3.5mm	Yes	Yes
Ethernet RJ45	No	No
SD CardReader	No	Yes
Proprietary Charging Port	No	Yes