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ROG Zephyrus G15
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Legion Slim 5 14"
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Advantages of the ASUS ROG Zephyrus G15
  • Very good for content creation
  • Very good overall build quality
  • Best in class speakers
Advantages of the Lenovo Legion Slim 5 14"
  • Very good overall display quality
  • Very good keyboard

Key differences

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Screen Quality

7.9
ROG Zephyrus G15
Legion Slim 5 14"
8.5
15.6in
SIZE
14.5in
2560 x 1440
RESOLUTION
2880 x 1800
IPS
DISPLAY TECHNOLOGY
OLED
165Hz
REFRESH RATE
120Hz
309.0 nits
BRIGHTNESS
400.0 nits
The ASUS ROG Zephyrus G15 has a better screen than the Lenovo Legion Slim 5 for content creation, while the Lenovo Legion Slim 5 has a better screen for general use, gaming and AI, engineering and design, and content creation.

Battery

9.5 Hours
ROG Zephyrus G15
Legion Slim 5 14"
7.0 Hours
The ASUS ROG Zephyrus G15 has 9.5 hours of battery life. The Lenovo Legion Slim 5 has 7 hours of battery life.

Build Quality

8.5
ROG Zephyrus G15
Legion Slim 5 14"
7.8
The ASUS ROG Zephyrus G15 has very good build quality, while the Lenovo Legion Slim 5 14" has good build quality.
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Key similarities

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General Use

7.9
ROG Zephyrus G15
Legion Slim 5 14"
7.8
2560 x 1440
RESOLUTION
2880 x 1800
IPS
DISPLAY TECHNOLOGY
OLED
309.0 nits
DISPLAY BRIGHTNESS
400.0 nits
9.5 Hours
BATTERY LIFE
7.0 Hours
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
7.5/10
PORTABILITY SCORE
7.6/10
The ASUS ROG Zephyrus G15 and Lenovo Legion Slim 5 14" are both good for general use.

Gaming and AI

7.5
ROG Zephyrus G15
Legion Slim 5 14"
7.7
7.4/10
OVERALL GPU SCORE
7.3/10
2560 x 1440
RESOLUTION
2880 x 1800
165Hz
REFRESH RATE
120Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.5/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 are both good for gaming and AI.

Engineering and Design

8.0
ROG Zephyrus G15
Legion Slim 5 14"
8.4
7.5/10
OVERALL CPU SCORE
9.1/10
7.4/10
OVERALL GPU SCORE
7.3/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 are both very good for engineering and design.

Content Creation

8.0
ROG Zephyrus G15
Legion Slim 5 14"
7.9
7.5/10
OVERALL CPU SCORE
9.1/10
2560 x 1440
RESOLUTION
2880 x 1800
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
OLED
Although they have very similar scores, PerfectRec considers ASUS ROG Zephyrus G15 to be very good for content creation, while the Lenovo Legion Slim 5 14" is good.

Software Development

7.4
ROG Zephyrus G15
Legion Slim 5 14"
7.9
7.5/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
2880 x 1800
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 are both good for software development.

Portability

Good
ROG Zephyrus G15
Legion Slim 5 14"
Good
15.6in
SIZE
14.5in
4.1 lbs
WEIGHT
3.8 lbs
0.7in
THICKNESS
0.8in
The Lenovo Legion Slim 5 14" and ASUS ROG Zephyrus G15 both have good portability.
The most portable laptops are small, thin, and light.

Cost

$1,248
ROG Zephyrus G15
Legion Slim 5 14"
$1,295
Product imageProduct image

$600

$800

$1,000

$1,200

$1,400

$1,600

$1,800

$2,000

The ASUS ROG Zephyrus G15 has a price of $1,248 and the Lenovo Legion Slim 5 14" costs $1,295.

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How the ASUS ROG Zephyrus G15 and the Lenovo Legion Slim 5 14" compare to other laptops

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Spec Comparison

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ASUS ROG Zephyrus G15Lenovo Legion Slim 5 14"
ASUS ROG Zephyrus G15Lenovo Legion Slim 5 14"

GENERAL

Price
$1,248
$1,295
Release Date
May 1, 2021February 1, 2024
Overall Dimensions
14'' x 9.6'' x 0.78''12.9'' x 9.8'' x 0.82''
Weight
4.19 lbs3.86 lbs
Width
13.98"12.89"
Depth
9.57"9.81"

INTERNAL

Processor
AMD Ryzen 9 5900HSAMD Ryzen 7 7840HS
RAM
16 GB16 GB
DDR Memory Version
45
RAM Slots
12
Storage
1024 GB512 GB

BATTERY

Battery Life
9.5 Hours7 Hours
Battery Capacity
90 Wh73.6 Wh

SCREEN

Diagonal Size
15.6"14.5"
Display Technology
IPSOLED
Resolution
2560 x 14402880 x 1800
Refresh Rate
165Hz120Hz
Display Brightness
309 nits400 nits

RELIABILITY, APPEARANCE & ACOUSTICS

Build Quality Score
8.5/107.8/10
Portability Score
7.5/107.6/10
Gaming Laptop Appearance
YesYes
Premium Business Laptop
NoNo
Fan Noise Score
6.5/106.5/10

HARDWARE FEATURES

Keyboard Quality Score
6.5/108.5/10
Speaker Quality Score
9.5/108/10
Webcam
No Webcam1080p
Fingerprint Reader
YesNo
Backlit Keyboard
YesYes
Number Pad
NoNo

CONNECTIVITY

USB Type-A
23
USB-C ports
22
USB-C Charging
YesYes
Display Outputs
33
Thunderbolt Ports
00

Shopping

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ASUS ROG Zephyrus G15

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Dig into reviews and images

NotebookCheck

Florian Glaser | February 2021
"As long as you're aware of the fact that the GeForce RTX 3080 laptop version can only unfold its potential to a limited extent due to Asus's low TDP setting and that it can be slower than a fast RTX 3070 laptop, the ROG Zephyrus G15 GA503Q cuts a fine figure. One of the biggest highlights turns out to be the WQHD panel, since it attracts customers with 165 Hz, relatively fast response times, FreeSync, and good color-space coverage. Other selling points are the surprisingly rich sound, the long battery life, and the sleek design. In terms of looks, the white edition stands out nicely from the competition."

Lenovo Legion Slim 5 14"

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Dig into reviews and images

PCMag

Mark Knapp | August 2023
"The Lenovo Legion Slim 5 Gen 8 acknowledges that a gaming laptop doesn’t have to be as thick as possible and can still ensure adequate cooling when the muscles need flexing. To this end, in the Slim 5 Gen 8, it finds a neat balance of refined, trimmed-down design that still lets its internals cruise (even above their max power ratings). Lenovo then added in some high-end build quality with an altogether excellent keyboard that’s useful for both work and play."

Get a great deal on the ASUS ROG Zephyrus G15 or the Lenovo Legion Slim 5 14"

About ASUS

ASUS, a Taiwanese electronics brand, is one of the largest personal computer vendor by market share. The majority of their laptops are targeted towards personal use or gaming. Their most popular product lines include the budget-friendly VivoBook, more premium ZenBook, and their TUF and ROG gaming laptops, the latter of which has a reputation for excellent gaming performance.

About Lenovo

Lenovo is a Chinese technology company, and one of the largest personal computer vendor. They are well known for a variety of technology products, including laptops. Their consumer series include their entry level IdeaPad and LOQ series and mid-to-high-end Yoga and Legion series. On the business-oriented side, their series include their entry-level ThinkBook series and mid-to-high-end ThinkPad series. Lenovo laptops offer strong performance for reasonable prices, and are often on sale.

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This information was produced and vetted by the PerfectRec laptops team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest laptop information and makes it digestible for you.

By the numbers

380
Laptops evaluated
48,640
Laptops stats compiled
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Proprietary Laptops ratings developed
93,495
Recommendations made
20,258
Consumer hours saved

About the laptop team

Joe Golden, Ph.D

CEO and Laptops Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.

Jason Lew

Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.

Chandradeep Chowdhury

Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.

Craig Russell

Laptops Expert
Craig is a UK-based laptops expert. Craig works in IT, where he recommends and supports laptops and PCs for clients and has been recommending laptops on Reddit for five years.

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