ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400 Comparison

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ASUS ZenBook 13 OLED UM325

13.3 inches | January 2021

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ASUS ExpertBook B9 B9400

14 inches | January 2021

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ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400 Comparison Overview

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In this review, we will be comparing ZenBook 13 OLED UM325 and ExpertBook B9 B9400, two laptops by ASUS. ASUS ZenBook 13 OLED UM325 was introduced to market in January 2021 and ASUS ExpertBook B9 B9400 was launched in January 2021. Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 were launched within the same month so we are expecting this to be a fair comparison regarding age and available technology level.

Click for Available Configurations of the Laptops

Here is a brief look at the main features of ASUS ZenBook 13 OLED UM325 and ASUS ExpertBook B9 B9400 before getting into our more detailed comparison.

ASUS ZenBook 13 OLED UM325 Key Specs

Launched in January 2021
13.3" OLED, 16:9 Aspect Ratio Display
CPU: AMD Ryzen 5 5500U
GPU: Radeon RX Vega 7
8GB Ram
304.2 x 203 x 13.9 mm (11.98 x 7.99 x 0.55 inches)
Weight: 1.14 kg (2.51 lbs)

ASUS ExpertBook B9 B9400 Key Specs

Launched in January 2021
14.0" IPS LCD, 16:9 Aspect Ratio Display
CPU: Intel Core i5 1135G7
GPU: Intel Iris Xe Graphics G7 (80EU)
8GB Ram
320 x 203 x 14.9 mm (12.6 x 7.99 x 0.59 inches)
Weight: 0.88 kg (1.94 lbs)

Let's read on the following sections in order to better understand in detail how ZenBook 13 OLED UM325 and ExpertBook B9 B9400 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 ZenBook 13 OLED UM325 over ASUS ExpertBook B9 B9400

Side Bezel Thickness	4.9 mm vs 5.1 mm	0.2 mm thinner bezels
Noise Level	39 dB vs 47.5 dB	Less fan noise
Contrast Rate	7400:1 vs 1507:1	more pleasing colors
Screen PPI	166 ppi vs 157 ppi	More pixels per inch
sRGB Color Space	100% vs 98.7%	Wider sRGB Color Space Coverage
Adobe RGB Profile	99.7% vs 65.4%	Wider Adobe RGB Coverage
Response Time	4 ms vs 45 ms	Faster Response screen
CPU Fabrication Process	7 nm vs 10 nm	Newer Generation CPU
GPU Fabrication Process	7 nm vs 10 nm	Newer Generation GPU
SD Card Reader	Yes vs No	Read & Write SD Cards with the built-in reader

Reasons to choose ASUS ExpertBook B9 B9400 over ASUS ZenBook 13 OLED UM325

Weight	0.88 kg vs 1.14 kg	0.26 kg lighter
Screen-to-Body Ratio	~83.2% vs ~78.9%	Larger screen area ratio
Display Size	14 inches vs 13.3 inches	Larger Screen Estate
Screen Opening Angle	180° vs 150°	More flexible screen
Screen Type	Matte vs Glossy	potentially less reflections on screen
Max Brightness	450 nits vs 400 nits	Brighter Screen
GPU FLOPS	1.41 TFLOPS vs 1.108 TFLOPS	Faster data transfers
NVMe Type SSD	Yes vs No	3D Surround Sound Support
Dolby Atmos Speakers	Yes vs No	Generates higher sound levels
Speaker Loudness	77.7 dB vs 65.2 dB	Easy login with fingerprint
Fingerprint Sensor	Yes vs No	Option to use Display port to connect to external monitors
Display Port	Yes vs No	Better typing feel
Key Travel	1.5 mm vs 1.4 mm

Common Strengths of ASUS ExpertBook B9 B9400 and ASUS ZenBook 13 OLED UM325

Fast Charging Support	Yes vs Yes	Charge the battery in a shorter time
USB Power Delivery	Yes vs Yes	Charging via USB port gives flexibility
Upgradable Storage	Yes vs Yes	Option to increase the Storage size
Wi-Fi Standard	v6 vs v6	Fast and Reliable Wi-Fi Connections
Thunderbolt Port	v3 vs v4	Fast data and power transfer via Thunderbolt Port
HDMI Output	1x HDMI 2.0 vs 1x HDMI 2.0	Connect to External Displays via HDMI cable
VGA Output	No vs No	Connect to External Displays via VGA cable
Keyboard Backlight	Yes vs Yes	Easily see the keys under low light

Common Weaknesses of ASUS ExpertBook B9 B9400 and ASUS ZenBook 13 OLED UM325

Touchscreen Capability	No vs No	No Touchscreen Capability
Upgradable RAM	No vs No	No Option to increase the RAM size

ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400: Physical Specs Comparison

In this section, we will be comparing the physical specifications and body features of the ASUS ZenBook 13 OLED UM325 and the ASUS ExpertBook B9 B9400.

Physical Specs
Weight	1.14 kg (2.51 lbs)	0.88 kg (1.94 lbs)
Surface Area	618 cm2 (95.7 inches2)	650 cm2 (100.7 inches2)
Screen to Surface Ratio	~78.9%	~83.2%
Side Bezel Thickness	~4.9 mm	~5.1 mm
Weight per Inch of Screen	0.09 kg/inch	0.06 kg/inch
	0.198 lbs/inch	0.132 lbs/inch
Colors	Silver, Pink	Black
Cover Opening Angle	150Â°	180Â°

Comparison of the ASUS ZenBook 13 OLED UM325 and the ASUS ExpertBook B9 B9400 External Dimensions

Weight

ZenBook 13 OLED UM325 weighs 1.14 kg (2.51 lbs), whereas the ExpertBook B9 B9400 weighs 0.88 kg (1.94 lbs). There is a notable difference in weight between these two laptops. However, it's important to consider that comparing their weights directly may not provide a complete picture since they also have different display sizes.

Weight Comparison

ASUS ZenBook 13 OLED UM325 1.14 kg

Avg: 13.0-13.9" 1.22 kg

ASUS ExpertBook B9 B9400 0.88 kg

Avg: 14.0-14.9" 1.42 kg

Thickness Comparison

ASUS ZenBook 13 OLED UM325 13.90 mm

Avg: 13.0-13.9" 15.32 mm

ASUS ExpertBook B9 B9400 14.90 mm

Avg: 14.0-14.9" 17 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 ASUS ZenBook 13 OLED UM325 is 0.09 kg/inch.In comparison, this value for the ASUS ExpertBook B9 B9400 is 0.06 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

ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400: Internals (CPU, GPU, RAM, Battery, SSD, etc.) Comparison

CPU Comparison

CPU Model	AMD Ryzen 5 5500U AMD Ryzen 5 5600U AMD Ryzen 7 5700U AMD Ryzen 7 5800U	Intel Core i5 1135G7 Intel Core i5 1145G7 Intel Core i7 1165G7 Intel Core i7 1185G7
Base Frequency	2.1 GHz	0.9-2.4 GHz
Turbo Frequency	4 GHz	4.2 GHz
Number of Cores	6	4
Number of Threads	12	8
L3 Cache	8 MB	8 MB
Integrated GPU	Radeon RX Vega 7	Iris Xe Graphics G7 80EU
CPU Fabrication Process	7 nm	10 nm
Geekbench 5 (Single)	1111	1324
Geekbench 5 (Multi)	4960	4633
Cinebench 23 (Single)	1183	1355
Cinebench 23 (Multi)	7120	5087

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 ZenBook 13 OLED UM325 and ASUS ExpertBook B9 B9400.

You may also read reviews of latest laptops with the same CPUs and compare them:

Laptops with: AMD Ryzen 5 5500U

Laptops with: Intel Core i5 1135G7

GPU Comparison

GPU Model	Radeon RX Vega 7	Intel Iris Xe Graphics G7 (80EU)
Base Clock Frequency	300 MHz	300 MHz
Boost CLock Frequency	1800 MHz	1100 MHz
TGP (Total Graphics Power)	45 W	15 W
Type	Integrated	Integrated
FLOPS	1.613 TFLOPS	1,408 GFLOPS
Memory Size	System Shared	System Shared
Memory Type	System Shared	System Shared
Memory Bus	System Shared	System Shared
Memory Speed	System Shared	System Shared
Shading Units Cores	448	640
TMUs	28	40
ROPs	8	20

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 ZenBook 13 OLED UM325 has a FLOPS value of 1.108 TFLOPS whereas the ASUS ExpertBook B9 B9400 ' has a FLOPS value of 1.41 TFLOPS. If graphical performance of the laptop is important for your use type, the ASUS ExpertBook B9 B9400 may be the better choice between these two setups.

RAM Comparison

RAM	8GB 16GB	8GB 16GB 32GB
Memory Bus	1x8 GB	1x8 GB
RAM Clock	3733 MHz	3733 MHz
RAM Type	LPDDR4X	LPDDR4X
Upgradable	No	No
Total Slots	2	2
Memory Bus	PCI-E Gen 3.0 (2x)	PCI-E Gen 3.0 (4x)

Both laptops, the ZenBook 13 OLED UM325 and the ExpertBook B9 B9400, 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 ZenBook 13 OLED UM325	ASUS ExpertBook B9 (B9400)
Small Models(1-3B):Examples: Phi-2, Qwen-1.8B	✔ Run smoothly.	✔ Run smoothly.
Medium Models(7-8B):Examples: Mistral-7B, Qwen-7B	✖ Not supported.	✖ Not supported.
Large Models(13-30B):Examples: Mixtral, Qwen-14B	✖ Not supported.	✖ 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	67 Wh	33 Wh 66 Wh
Battery Type	Li-Ion	Li-Ion
Replaceable	No	No
Fast Charging	No	No
USB Power Delivery	Yes	Yes
Charging Port Position	Left	Left
Charge Power	65 W	65 W
Full Charging Time	2:00 hr	1:30 hr
AC Adapter Weight	216 gramm	325 gramm

Moreover, the ZenBook 13 OLED UM325 boasts a larger battery capacity of 67 Wh, offering extended usage time compared to the ExpertBook B9 B9400's33 Wh.

Battery Comparison

ASUS ZenBook 13 OLED UM325 67 Wh

Avg: 13.0-13.9" 52.97 Wh

ASUS ExpertBook B9 B9400 33 Wh

Avg: 14.0-14.9" 55.93 Wh

STORAGE
The ExpertBook B9 B9400 offers a larger max storage capacity of 2 TB, providing more room for storing files and data compared to the ZenBook 13 OLED UM325's storage capacity of 1 TB.

Storage Options	512 GB, 1 TB	512 GB, 1 TB, 1 TB, 2 TB, 2 TB
Upgradable	Yes	Yes
Total Slots	1	2
Storage type	SSD (M2)	SSD (M2)
NVMe	No	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.

ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400: Display Comparison

The display is an essential aspect to consider when comparing the ASUS ZenBook 13 OLED UM325 and ASUS ExpertBook B9 B9400 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. ZenBook 13 OLED UM325 has a display size of 13.3".On the other hand, ExpertBook B9 B9400 has a larger14.0" display.The total usable screen area of the ZenBook 13 OLED UM325 is 487cm² / 76inch² whereas the ExpertBook B9 B9400's total usable screen area is 540cm² / 84inch².

PPI (Pixels per Inch)
Additionally, the ZenBook 13 OLED UM325 features a higher pixel density with 166 pixels per inch (PPI), ensuring sharper image details.

Screen PPI (Pixels Per Inch) Comparison

ASUS ZenBook 13 OLED UM325 166 PPI

Avg: 13.0-13.9" 186 PPI

ASUS ExpertBook B9 B9400 157 PPI

Avg: 14.0-14.9" 173 PPI

Refresh Rate
Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 offer the same refresh rate of 60 Hz.

Furthermore, the ZenBook 13 OLED UM325 boasts a faster response time of 4.0 ms, reducing motion blur for fast-paced content.

Brightness
The ExpertBook B9 B9400 offers a higher maximum brightness of 450 nits, delivering a brighter screen.

Brightness Comparison

ASUS ZenBook 13 OLED UM325 400 nits

Avg: 13.0-13.9" 435 nits

ASUS ExpertBook B9 B9400 450 nits

Avg: 14.0-14.9" 383 nits

ASUS ZenBook 13 OLED UM325 vs ASUS ExpertBook B9 B9400 Connectivity Comparison

In terms of connectivity,

Wifi
Both laptops offer the same Wi-Fi standard (v6), 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 ZenBook 13 OLED UM325 and ExpertBook B9 B9400 feature 1x USB 3.2 USB-A ports.
Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 feature 2x 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
Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 feature Thunderbolt ports. ZenBook 13 OLED UM325 has Thunderbolt 3, while ExpertBook B9 B9400 has Thunderbolt 4.

HDMI
Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 feature an HDMI port (1x HDMI 2.0) 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
ZenBook 13 OLED UM325 is equipped with an SD Card Reader for easy access to memory cards. ExpertBook B9 B9400 does not have an SD Card Reader.

Audio Jack
Both ZenBook 13 OLED UM325 and ExpertBook B9 B9400 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)	v6	v6
Bluetooth (latest: v5.4)	v5	v5
USB-A (latest: 3.2)	1x USB 3.2	1x USB 3.2
USB Type-C (latest: USB4 2.0)	2x USB 3.2	2x USB 3.2
Thunderbolt (latest: 5)	Thunderbolt 3	Thunderbolt 4
HDMI (latest: 2.1)	1x HDMI 2.0	1x HDMI 2.0
Display Port (latest: v2.0)	No	1x v1.4
VGA	No	No
Fingerprint Sensor	No	Yes
Optical Drive	No	No
Audio Jack 3.5mm	Yes	Yes
Ethernet RJ45	No	No
SD CardReader	Yes	No
Proprietary Charging Port	No	No