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What we think
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Updated January 10, 2024·
The ASUS ROG Zephyrus G15 is a powerful laptop with better graphics handling suited for gaming, intensive 3D work, and engineering software, but it is heavier and has a higher price. It also lacks a touchscreen and is not as portable. On the other hand, the Lenovo Flex 5 14 is a more affordable and lightweight laptop with a touchscreen, making it ideal for general use and portability. It has a longer battery life but is not as well-suited for gaming or heavy 3D tasks due to its integrated graphics. Choose the ASUS for performance-heavy tasks or the Lenovo for general use and better portability. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the ASUS ROG Zephyrus G15
- Very good for engineering and design
- Good for gaming and AI
- Very good for content creation
- Good overall display quality
- Very good overall build quality
- Best in class speakers
Advantages of the Lenovo Flex 5 14
- Very good portability
- Very good battery life
- Good keyboard
Key differences
Gaming and AI
7.5
6.2
7.4/10
OVERALL GPU SCORE
3.6/10
2560 x 1440
RESOLUTION
1920 x 1200
165Hz
REFRESH RATE
60Hz
Yes
SUPPORTS DLSS
No
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.5/10
FAN NOISE SCORE
7.5/10
The ASUS ROG Zephyrus G15 is good for gaming and AI, while the Lenovo Flex 5 14 is only fair.
The ASUS ROG Zephyrus G15 outperforms the Lenovo Flex 5 14 in gaming and 3D tasks primarily because it has a significantly more powerful Nvidia RTX 3070 graphics card and a higher screen refresh rate, enhancing fluidity in visuals. In contrast, the Lenovo has a less capable integrated AMD graphics solution and a standard refresh rate, which limits its performance in these intensive tasks.
Engineering and Design
8.0
7.0
7.5/10
OVERALL CPU SCORE
6.9/10
7.4/10
OVERALL GPU SCORE
3.6/10
16.0 GB
RAM
16.0 GB
The ASUS ROG Zephyrus G15 is very good for engineering and design, while the Lenovo Flex 5 14 is good.
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.
Screen Quality
7.9
6.4
15.6in
SIZE
14.0in
2560 x 1440
RESOLUTION
1920 x 1200
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
60Hz
309.0 nits
BRIGHTNESS
277.0 nits
The ASUS ROG Zephyrus G15 has a better screen than the Lenovo Flex 5 14 for general use, gaming and AI, engineering and design, and content creation.
The ASUS ROG Zephyrus G15 likely offers a crisp and bright display with higher resolution suitable for both everyday tasks and detailed engineering work, whereas its limited refresh rate detracts from the gaming experience where smoother motion is key. The Lenovo Flex 5 14 provides adequate clarity and brightness for day-to-day activities and engineering applications but doesn't excel in any particular area, including color accuracy for design work. For gaming and 3D tasks, both the ASUS and Lenovo displays fall short, as their lower refresh rates may not provide the fluid visuals that are preferred for fast-paced action and immersive 3D environments.
Battery
9.5 Hours
11.5 Hours
The ASUS ROG Zephyrus G15 has 9.5 hours of battery life. The Lenovo Flex 5 14 has 11.5 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.
Portability
Good
Very Good
15.6in
SIZE
14.0in
4.1 lbs
WEIGHT
3.4 lbs
0.7in
THICKNESS
0.7in
The Lenovo Flex 5 14 has very good portability, while the ASUS ROG Zephyrus G15 has good portability.
The most portable laptops are small, thin, and light.
Build Quality
8.5
7.0
The ASUS ROG Zephyrus G15 has very good build quality, while the Lenovo Flex 5 14 has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,637
$950
$0
$500
$1,000
$1,500
$2,000
$2,500
The ASUS ROG Zephyrus G15 has a price of $1,637 and the Lenovo Flex 5 14 costs $950.
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Key similarities
General Use
7.9
7.7
2560 x 1440
RESOLUTION
1920 x 1200
IPS
DISPLAY TECHNOLOGY
IPS
309.0 nits
DISPLAY BRIGHTNESS
277.0 nits
9.5 Hours
BATTERY LIFE
11.5 Hours
6.5/10
KEYBOARD QUALITY SCORE
7.0/10
7.5/10
PORTABILITY SCORE
8.3/10
The ASUS ROG Zephyrus G15 and Lenovo Flex 5 14 are both good for general use.
The ASUS ROG Zephyrus G15 stands out with a higher performance CPU and superior GPU, making it very suitable for tasks that demand more power, along with an excellent-quality screen for better visuals, whereas the Lenovo Flex 5 14 boasts a good balance of power, convertible portability with touchscreen functionality, and longer battery life, favorable for convenience in general use.
Content Creation
8.0
7.6
7.5/10
OVERALL CPU SCORE
6.9/10
2560 x 1440
RESOLUTION
1920 x 1200
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
Although they have very similar scores, PerfectRec considers ASUS ROG Zephyrus G15 to be very good for content creation, while the Lenovo Flex 5 14 is good.
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.
Software Development
7.4
7.4
7.5/10
OVERALL CPU SCORE
6.9/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
1920 x 1200
6.5/10
KEYBOARD QUALITY SCORE
7.0/10
The Lenovo Flex 5 14 and ASUS ROG Zephyrus G15 are both good for software development.
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.
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How the ASUS ROG Zephyrus G15 and the Lenovo Flex 5 14 compare to other laptops
Spec Comparison
 |  | |
| ASUS ROG Zephyrus G15 | Lenovo Flex 5 14 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,637 | $950 | ||
Release Date | |||
Release Date | May 1, 2021 | December 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 14'' x 9.6'' x 0.78'' | 12.3'' x 8.9'' x 0.7'' | |
Weight | |||
Weight | 4.19 lbs | 3.42 lbs | |
Width | |||
Width | 13.98" | 12.32" | |
Depth | |||
Depth | 9.57" | 8.85" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | AMD Ryzen 9 5900HS | AMD Ryzen 7 7730U | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 1 | 0 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 9.5 Hours | 11.5 Hours | |
Battery Capacity | |||
Battery Capacity | 90 Wh | 52.5 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 14" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 2560 x 1440 | 1920 x 1200 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 60Hz | |
Display Brightness | |||
Display Brightness | 309 nits | 277 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8.5/10 | 7/10 | |
Portability Score | |||
Portability Score | 7.5/10 | 8.3/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | Yes | No | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 6.5/10 | 7.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 6.5/10 | 7/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 9.5/10 | 6/10 | |
Webcam | |||
Webcam | No Webcam | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | Yes | Yes | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 2 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 1 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 2 | |
Thunderbolt Ports | |||
Thunderbolt Ports | 0 | 0 | |
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."
Lenovo Flex 5 14
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Dig into reviews and images
NotebookCheck
Allen Ngo | May 2021
"The highlight of the latest IdeaPad Flex 5 14 is clearly its AMD CPU. The octa-core Ryzen 7 5700U is insanely fast even when compared to the best Tiger Lake Ultrabooks in the market or even Core H CPUs in many gaming laptops. It's a lot of raw processing power for what is supposed to be a budget 14-inch convertible. If your daily workloads can benefit from extra multi-thread CPU performance, then look no further than the inexpensive AMD-powered Lenovo IdeaPad Flex 5 14. For regular on-the-road browsing or video streaming, however, a slimmer and lighter 10th gen Core Yoga, Spectre, or XPS would be a more balanced option."
Get a great deal on the ASUS ROG Zephyrus G15 or the Lenovo Flex 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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