Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405 Comparison

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Asus ExpertBook B3 B3405

14 inches | January 2025

Speed 6

Size 8.5

Display 3.5

Gaming 3.5

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Asus ExpertBook B5 B5405

14 inches | February 2025

Speed 6

Size 9

Display 3.5

Gaming 3.5

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Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405 Comparison Overview

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In this review, we will be comparing ExpertBook B3 B3405 and ExpertBook B5 B5405, two laptops by Asus. Asus ExpertBook B3 B3405 was introduced to market in January 2025 and Asus ExpertBook B5 B5405 was launched in February 2025. There is only 1 months difference between ExpertBook B3 B3405 and ExpertBook B5 B5405 so we are expecting this to be a fair comparison regarding age and technology level.

Click for Available Configurations of the Laptops

ExpertBook B3 B3405 and ExpertBook B5 B5405 are members of Asus's series of laptops. Below you can find the latest models from this series.

Asus Series History

	Release Date	Screen Size	Dimensions	Weight
Asus ExpertBook Ultra	January 2026	14.0"	310.9 x 212.8 x 10.9-16.4 mm	0.99 kg (2.18 lbs)
Asus Zenbook A16 UX3607	January 2026	16.0"	353.5 x 242.4 x 13.8-16.6 mm	1.2 kg (2.65 lbs)
Asus ProArt PZ14 HT7407	January 2026	14.0"	319.6 x 206.4 x 0.9 mm	0.79 kg (1.74 lbs)
Asus ROG Zephyrus G16 2026 GU606	January 2026	16.0"	354 x 246 x 14.9-16.4 mm	1.85 kg (4.08 lbs)
Asus ROG Flow Z13-KJP 2026	January 2026	13.4"	300 x 204 x 14.5-14.9 mm	1.72 kg (3.79 lbs)
Asus ROG Zephyrus Duo 16 GX651	January 2026	16.0"	355 x 246 x 19.9-24.9 mm	2.82 kg (6.22 lbs)
Asus ROG Zephyrus G14 2026 GU405	January 2026	14.0"	311 x 220 x 15.9-16.3 mm	1.5 kg (3.31 lbs)
Asus ROG Zephyrus G14 2026 GA403	January 2026	14.0"	311 x 220 x 15.9-16.3 mm	1.5 kg (3.31 lbs)

Here is a brief look at the main features of Asus ExpertBook B3 B3405 and Asus ExpertBook B5 B5405 before getting into our more detailed comparison.

Asus ExpertBook B3 B3405 Key Specs

Launched in January 2025
14.0" IPS LCD, 16:10 Aspect Ratio Display
CPU: Intel Core Ultra 5 225H
GPU: Intel Arc 130T
8GB Ram
315.1 x 226.8 x 18.9-19 mm (12.41 x 8.93 x 0.74-0.75 inches)
Weight: 1.42 kg (3.13 lbs)

Asus ExpertBook B5 B5405 Key Specs

Launched in February 2025
14.0" IPS LCD, 16:10 Aspect Ratio Display
CPU: Intel Core Ultra 5 225H
GPU: Intel Arc 130T
8GB Ram
315.1 x 226.8 x 18.9-19 mm (12.41 x 8.93 x 0.74-0.75 inches)
Weight: 1.35 kg (2.98 lbs)

Let's read on the following sections in order to better understand in detail how ExpertBook B3 B3405 and ExpertBook B5 B5405 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 Asus ExpertBook B5 B5405 over Asus ExpertBook B3 B3405

Weight	1.35 kg vs 1.42 kg	0.07 kg lighter

Common Strengths of Asus ExpertBook B5 B5405 and Asus ExpertBook B3 B3405

Launch Dates	January 2025 vs February 2025	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
Upgradable RAM	Yes vs Yes	Option to increase the RAM size
RAM Type	DDR5 vs DDR5	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
Thunderbolt Port	v4 vs v4	Fast data and power transfer via Thunderbolt Port
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
Ethernet RJ45 Port	Yes vs Yes	Fast connection to Network via ethernet cable
Built-in SD Card Reader	Yes vs Yes	Read & Write SD Cards
Keyboard Backlight	Yes vs Yes	Easily see the keys under low light

Common Weaknesses of Asus ExpertBook B5 B5405 and Asus ExpertBook B3 B3405

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

Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405: Physical Specs Comparison

In this section, we will be comparing the physical specifications and body features of the Asus ExpertBook B3 B3405 and the Asus ExpertBook B5 B5405.

Physical Specs
Weight	1.42 kg (3.13 lbs)	1.35 kg (2.98 lbs)
Surface Area	715 cm2 (110.8 inches2)	715 cm2 (110.8 inches2)
Screen to Surface Ratio	~79.5%	~79.5%
Side Bezel Thickness	~6.8 mm	~6.8 mm
Weight per Inch of Screen	0.10 kg/inch	0.10 kg/inch
	0.22 lbs/inch	0.22 lbs/inch
Colors	Gray	Gray
Cover Opening Angle	180°	180°

Comparison of the Asus ExpertBook B3 B3405 and the Asus ExpertBook B5 B5405 External Dimensions

Weight

ExpertBook B3 B3405 weighs 1.42 kg (3.13 lbs), whereas the ExpertBook B5 B5405 weighs 1.35 kg (2.98 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 14.0-14.9 inches

Asus ExpertBook B3 B3405

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Thickness Comparison

Displays size 14.0-14.9 inches

Asus ExpertBook B3 B3405

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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 Asus ExpertBook B3 B3405 is 0.10 kg/inch.In comparison, this value for the Asus ExpertBook B5 B5405 is 0.10 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
Asus ProArt PZ14 HT7407: 0.06 kg/inch
Dell Latitude 7330: 0.07 kg/inch
Lenovo ThinkPad X1 Nano Gen 2: 0.07 kg/inch

Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405: Internals Comparison

CPU Comparison

CPU Model	Intel Core Ultra 5 225H Intel Core Ultra 7 255H	Intel Core Ultra 5 225H Intel Core Ultra 7 255H
Base Frequency		1.7 GHz

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 Asus ExpertBook B3 B3405 and Asus ExpertBook B5 B5405.

You may also read reviews of latest laptops with the same CPU ( Intel Core Ultra 5 225H ) and compare them:

GPU Comparison

GPU Model	Intel Arc 130T	Arc Graphics 130T
Base Clock Frequency	300 MHz	300 MHz
Boost CLock Frequency	2200 MHz	2200 MHz
TGP (Total Graphics Power)		35 W
Type	Integrated	Integrated
FLOPS	3.9 TFLOPS	3.9 TFLOPS
Memory Size	System Shared	System Shared
Memory Type	DDR5	DDR5
Memory Speed	6.4 Gbps	6.4 Gbps
Shading Units Cores	896	896
TMUs	56	56
ROPs	28	28

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. Asus ExpertBook B3 B3405 has a FLOPS value of 3.9 TFLOPS whereas the Asus ExpertBook B5 B5405 ' has a FLOPS value of 3.9 TFLOPS.

RAM Comparison

RAM	8GB 16GB 32GB 64GB	8GB 16GB 32GB 64GB
Memory Bus	1x8 GB	1x8 GB
RAM Clock	6400 MHz	6400 MHz
RAM Type	DDR5	DDR5
Upgradable	Yes	Yes
Max RAM Size	64 GB	64 GB
Total Slots	2	2

Both laptops, the ExpertBook B3 B3405 and the ExpertBook B5 B5405, come with similar RAM capacities of 8 GB, providing comparable performance in memory-intensive tasks.

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	Asus ExpertBook B3 (B3405)	Asus ExpertBook B5 (B5405)
CPU	Intel Core Ultra 5 225H (NPU - 13 TOPS)	Intel Core Ultra 5 225H (NPU - 13 TOPS)
GPU	Intel Arc 130T	Arc Graphics 130T
Memory	8 GB	8 GB
Available for LLM total	~3.5 GB (3.5 GB RAM)	~3.5 GB (3.5 GB RAM)
Small Models (1-3B): Examples: Phi-2, Qwen-1.8B Requires ~2 GB memory	✔ Modest Speed fits in your 3.5 GB RAM	✔ Modest Speed fits in your 3.5 GB RAM
Medium Models (7-8B): Examples: Mistral-7B, Qwen-7B Requires ~5 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM
Large Models
13-15B Models (e.g., Llama 3 14B, Qwen1.5 14B) Requires ~9 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM
16-24B Models (e.g., Dense 20B Q4 ~15.5GB) Requires ~14 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM
24-30B Models (e.g., Dense 30B Q4) Requires ~18 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM
MoE Models (Mixture-of-Experts) (e.g., Mixtral 8x7B - total ~47B, active ~12-13B) Requires ~24 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM
Extra-Large Models (65B+): Examples: LLaMA2-70B, Qwen1.5-72B Requires ~42 GB memory	✖ Not Supported exceeds available RAM	✖ Not Supported exceeds available RAM

For more detailed LLM evaluation (subcategories, performance ranges, memory breakdown)

Asus ExpertBook B3 (B3405)|Asus ExpertBook B5 (B5405)

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

📌 Model Types: Dense 30B Q4 models typically require around 19–22 GB of total VRAM, so they run best on systems with ≥24 GB VRAM. MoE models like Mixtral 8x7B (≈47B total parameters, usually ≈23–26 GB in 4-bit) also need high memory because all experts must be loaded, even though only a few are active per token. They reduce compute cost per token (similar to a ~12–13B dense model), but not memory usage, so they are not practical on 14–16 GB systems.

🚀 Modern NPU (Neural Processing Unit): Modern processors like AMD Ryzen AI and Intel Core Ultra feature NPU and unified memory architecture. NPUs provide modest performance gains (0-30% faster) with better power efficiency compared to iGPU-only execution. Real-world tests show ~3-10 tok/s range on 13B models with 32GB RAM (varies by runtime, quantization, and context), comparable to iGPU but more power-efficient. Note: These figures are examples from various NPU systems; actual performance depends on your specific hardware configuration.

Understanding Performance Categories

The performance descriptions use general categories because actual speed varies greatly based on your specific hardware, model optimization, context length, and runtime software.

Performance Level	Typical Range	User Experience
Runs Smoothly (High-end dGPU)	50+ tok/s	Real-time response. Feels instant, like ChatGPT.
Runs Well (Mid-range dGPU)	20-50 tok/s	Good interactive performance. Slight delay, but usable.
Modest Speed (iGPU/NPU/CPU)	5-20 tok/s	Usable for tasks that don't need instant responses. Noticeable typing delay.
Borderline / Slow (Limited hardware)	2-5 tok/s	Slow-Very slow. Patience required. Better for batch processing.
Not Practical	<2 tok/s	Too slow for regular use. May cause system hangs or instability.

💡 Tip: Your actual results may be higher or lower than these ranges. Test with your specific hardware to know for sure!

⚠️ Note: Performance categorization is based on VRAM capacity and RAM fallback status. GPU type (memory bandwidth, compute power) can also affect actual performance. Currently, we prioritize whether the model fits in VRAM or requires RAM fallback for classification. We may refine this categorization in future updates based on more detailed benchmarks.

BATTERY

BATTERY	50 Wh 63 Wh	50 Wh 63 Wh
Battery Type	Li-Po	Li-Po
Replaceable	No	No
Fast Charging	Yes	Yes
Charging Port Position	Left	Left
Charge Power	65 W	65 W

Furthermore, both laptops have the same battery capacity of 50 Wh, ensuring comparable battery performance.

Battery Comparison

Displays size 14.0-14.9 inches

Asus ExpertBook B3 B3405

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STORAGE
Both laptops, the ExpertBook B3 B3405 and the ExpertBook B5 B5405 have similar max. storage capacities of 2 TB, allowing for ample space to store files and applications.

Storage Options	512 GB, 1 TB, 2 TB	512 GB, 1 TB, 2 TB
Upgradable	Yes	Yes
Total Slots	2	2
Storage type	SSD (M2)	SSD (M2)
NVMe	Yes	Yes
Memory Bus	PCI-E Gen 4.0 (4x)	PCI-E Gen 4.0 (4x)

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.

Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405: Display Comparison

The display is an essential aspect to consider when comparing the Asus ExpertBook B3 B3405 and Asus ExpertBook B5 B5405 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 ExpertBook B3 B3405 and ExpertBook B5 B5405 screens have the same size of 14.0".The total usable screen area of the ExpertBook B3 B3405 is 568cm² / 88inch² whereas the ExpertBook B5 B5405's total usable screen area is 568cm² / 88inch².

PPI (Pixels per Inch)
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 feature the same pixel density with 162 pixels per inch (PPI).

Screen PPI (Pixels Per Inch) Comparison

Displays size 14.0-14.9 inches

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Refresh Rate
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 offer the same refresh rate of 60 Hz.

Brightness
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 offer the same maximum brightness of 300 nits (cd/m²).

Brightness Comparison

Displays size 14.0-14.9 inches

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Asus ExpertBook B3 B3405 vs Asus ExpertBook B5 B5405 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 ExpertBook B3 B3405 and ExpertBook B5 B5405 feature 2x USB 3.2 USB-A ports.
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 feature 2x USB 4.0 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
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 are equipped with Thunderbolt 4 ports.

HDMI
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 feature an HDMI port (1x HDMI 2.1) for connecting to external monitors.

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
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 come with an SD Card Reader for easy access to memory cards.

Audio Jack
Both ExpertBook B3 B3405 and ExpertBook B5 B5405 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: v6.2)	v5.4	v5.4
USB-A (latest: 3.2)	2x USB 3.2	2x USB 3.2
USB Type-C (latest: USB4 2.0)	2x USB 4.0	2x USB 4.0
Thunderbolt (latest: 5)	Thunderbolt 4	Thunderbolt 4
HDMI (latest: 2.1)	1x HDMI 2.1	1x HDMI 2.1
Display Port (latest: v2.0)	No	No
VGA	No	No
Fingerprint Sensor	Optional	Optional
Optical Drive	No	No
Audio Jack 3.5mm	Yes	Yes
Ethernet RJ45	Yes	Yes
SD CardReader	Yes	Yes
Proprietary Charging Port	No	No