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Company ProductName Specs
Company ProductName Specs
Advantages of the ASUS ROG Zephyrus G15
- Good battery life
Advantages of the Lenovo Legion 7i
- Very good for general use
- Very good for gaming and AI
- Very good overall display quality
- Excellent keyboard
Key differences
Gaming and AI
7.5
8.7
7.4/10
OVERALL GPU SCORE
8.9/10
2560 x 1440
RESOLUTION
2560 x 1600
165Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.5/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion 7i is very good for gaming and AI, while the ASUS ROG Zephyrus G15 is good.
PerfectRec’s Gaming and AI Score strongly emphasizes graphics processing capability, while also taking into account other factors that impact suitability for gaming and AI work.
Engineering and Design
8.0
8.9
7.5/10
OVERALL CPU SCORE
9.9/10
7.4/10
OVERALL GPU SCORE
8.9/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion 7i and ASUS ROG Zephyrus G15 are both very good for engineering and design, though the Lenovo Legion 7i is somewhat better.
PerfectRec’s Engineering and Design Score takes into account the many different features of the laptop that make it more or less suitable for graphic design and 3D rendering work.
Software Development
7.4
7.9
7.5/10
OVERALL CPU SCORE
9.9/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
2560 x 1600
6.5/10
KEYBOARD QUALITY SCORE
9.0/10
The Lenovo Legion 7i and ASUS ROG Zephyrus G15 are both good for software development, though the Lenovo Legion 7i is somewhat better.
PerfectRec’s Software Development Score takes into account the many different features of the laptop that make it more or less suitable for software developers.
Screen Quality
7.9
8.7
15.6in
SIZE
16.0in
2560 x 1440
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
309.0 nits
BRIGHTNESS
500.0 nits
The Lenovo Legion 7i has a better screen than the ASUS ROG Zephyrus G15 for general use, gaming and AI, engineering and design, content creation, and software development.
PerfectRec’s screen quality scores take into account various important factors that are relevant for different use cases.
Battery
9.5 Hours
5.0 Hours
The ASUS ROG Zephyrus G15 has 9.5 hours of battery life. The Lenovo Legion 7i has 5 hours of battery life.
Battery life estimate is based on a mix of common use patterns. More portable and higher performing laptops tend to have less battery life.
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Key similarities
General Use
7.9
8.1
2560 x 1440
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
309.0 nits
DISPLAY BRIGHTNESS
500.0 nits
9.5 Hours
BATTERY LIFE
5.0 Hours
6.5/10
KEYBOARD QUALITY SCORE
9.0/10
7.5/10
PORTABILITY SCORE
7.2/10
Although they have very similar scores, PerfectRec considers Lenovo Legion 7i to be very good for general use, while the ASUS ROG Zephyrus G15 is good.
PerfectRec’s General Use Score takes into account the many different features of the laptop that make it more or less suitable for general productivity, web browsing, streaming, video calls, and running a wide variety of apps and programs.
Content Creation
8.0
8.3
7.5/10
OVERALL CPU SCORE
9.9/10
2560 x 1440
RESOLUTION
2560 x 1600
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Lenovo Legion 7i and ASUS ROG Zephyrus G15 are both very good for content creation.
PerfectRec’s Content Creation Score takes into account the many different features of the laptop that make it more or less suitable for photo editing, video editing and other content creation tasks.
Portability
Good
Good
15.6in
SIZE
16.0in
4.1 lbs
WEIGHT
4.9 lbs
0.7in
THICKNESS
0.7in
The ASUS ROG Zephyrus G15 and Lenovo Legion 7i both have good portability.
The most portable laptops are small, thin, and light.
Build Quality
8.5
8.5
The ASUS ROG Zephyrus G15 and Lenovo Legion 7i both have very good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,560
$1,548
$500
$1,000
$1,500
$2,000
$2,500
The ASUS ROG Zephyrus G15 has a price of $1,560 and the Lenovo Legion 7i costs $1,548.
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How the ASUS ROG Zephyrus G15 and the Lenovo Legion 7i compare to other laptops
Spec Comparison
 |  | |
| ASUS ROG Zephyrus G15 | Lenovo Legion 7i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,560 | $1,548 | ||
Release Date | |||
Release Date | May 1, 2021 | March 1, 2024 | |
Overall Dimensions | |||
Overall Dimensions | 14'' x 9.6'' x 0.78'' | 14.1'' x 10.3'' x 0.78'' | |
Weight | |||
Weight | 4.19 lbs | 4.94 lbs | |
Width | |||
Width | 13.98" | 14.08" | |
Depth | |||
Depth | 9.57" | 10.33" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | AMD Ryzen 9 5900HS | Intel i9-14900HX | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 1 | 2 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 9.5 Hours | 5 Hours | |
Battery Capacity | |||
Battery Capacity | 90 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 16" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 2560 x 1440 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 309 nits | 500 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8.5/10 | 8.5/10 | |
Portability Score | |||
Portability Score | 7.5/10 | 7.2/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | Yes | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 6.5/10 | 6.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 6.5/10 | 9/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 9.5/10 | 9.8/10 | |
Webcam | |||
Webcam | No Webcam | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | Yes | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | Yes | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 2 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 3 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 3 | |
Thunderbolt Version | |||
Thunderbolt Version | N/A | 4 | |
Shopping
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."
Get a great deal on the ASUS ROG Zephyrus G15 or the Lenovo Legion 7i
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
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About the laptop team
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CEO and Laptops Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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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.
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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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