The ASUS ROG Strix G15 typically costs more and offers good performance for general use, 3D rendering, and gaming, but it is less portable with a lower battery life. The Lenovo Legion Slim 5i generally costs less, has a better battery life, and higher performance scores, particularly in engineering and 3D tasks due to its higher-spec GPU. It also comes with a better display resolution and a more modern operating system pre-installed. If portability and display quality are crucial for your tasks, the Lenovo might suit you better, whereas if you prefer saving money without compromising on performance for heavy tasks, consider the ASUS. 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 Strix G15
Good portability
Advantages of the Lenovo Legion Slim 5i
Very good for engineering and design
Very good for gaming and AI
Very good for content creation
Very good overall display quality
Good battery life
Very good keyboard
Key differences
Gaming and AI
7.0/10
8.0/10
5.6/10
OVERALL GPU SCORE
8.4/10
1920 x 1080
RESOLUTION
2560 x 1600
144Hz
REFRESH RATE
165Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
7.2/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion Slim 5i is very good for gaming and AI, while the ASUS ROG Strix G15 is good.
The Lenovo Legion Slim 5i is rated higher for gaming and 3D due to its superior Nvidia RTX 4060 graphics card and a higher refresh rate screen, which means smoother visuals in fast-paced games compared to the ASUS ROG Strix G15's RTX 3050 Ti and lower refresh rate display. While both laptops are built for gaming, the Lenovo's stronger GPU and better display attributes enhance the gaming experience significantly.
Engineering and Design
7.6/10
8.4/10
7.8/10
OVERALL CPU SCORE
9.0/10
5.6/10
OVERALL GPU SCORE
8.4/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 5i is very good for engineering and design, while the ASUS ROG Strix G15 is good.
The Lenovo Legion Slim 5i shines in engineering and design use due to its superior GPU, higher-resolution screen with better color accuracy and contrast, and a more powerful latest-generation Intel processor, which are very important for such tasks. On the other hand, the ASUS ROG Strix G15 offers a strong AMD CPU and an ample GPU, but falls short on screen quality and may not match the enhanced visuals or processing capabilities of the Legion Slim 5i, though it still holds its ground as a capable machine for engineering and design purposes.
Software Development
7.2/10
7.8/10
7.8/10
OVERALL CPU SCORE
9.0/10
16.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
2560 x 1600
7.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 5i and ASUS ROG Strix G15 are both good for software development, though the Lenovo Legion Slim 5i 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
7.1/10
8.0/10
15.6in
SIZE
16.0in
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
144Hz
REFRESH RATE
165Hz
284.0 nits
BRIGHTNESS
343.0 nits
The Lenovo Legion Slim 5i has a better screen than the ASUS ROG Strix G15 for general use, gaming and AI, engineering and design, content creation, and software development.
The ASUS ROG Strix G15, with its good resolution and brightness, provides a comfortable viewing experience for everyday tasks and detailed work in engineering; however, its lower refresh rate makes it less ideal for gaming and 3D applications, which demand smoother motion and quick screen updates. The Lenovo Legion Slim 5i boasts very good panel quality and resolution, enhancing general use with vibrant visuals and clear text, while its color accuracy benefits engineering and design work, but like the ASUS, it falls short for gaming and 3D due to a less competitive refresh rate. Overall, both laptops cater well to general use and professional design tasks, but dedicated gamers and 3D artists would benefit from a machine with a higher refresh rate screen.
Battery
5.5 Hours
7.0 Hours
The ASUS ROG Strix G15 has 5.5 hours of battery life. The Lenovo Legion Slim 5i has 7 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.
Cost
$1,249
$1,055
$0
$500
$1,000
$1,500
$2,000
The ASUS ROG Strix G15 has a price of $1,249 and the Lenovo Legion Slim 5i costs $1,055.
The Lenovo Legion Slim 5i and ASUS ROG Strix G15 are both good for general use.
The ASUS ROG Strix G15 and Lenovo Legion Slim 5i both come equipped with solid CPU and RAM to handle general use tasks smoothly, and IPS screens with good color accuracy and resolution for clear visuals. The Legion Slim 5i offers a higher resolution display, increased portability, and longer battery life, while the ROG Strix G15 provides a good balance with slightly less weight and satisfactory performance for most general use scenarios.
Content Creation
7.7/10
8.0/10
7.8/10
OVERALL CPU SCORE
9.0/10
1920 x 1080
RESOLUTION
2560 x 1600
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
Although they have very similar scores, PerfectRec considers Lenovo Legion Slim 5i to be very good for content creation, while the ASUS ROG Strix G15 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.
Portability
Good
Fair
15.6in
SIZE
16.0in
4.6 lbs
WEIGHT
5.2 lbs
0.9in
THICKNESS
0.9in
Although they have very similar scores, PerfectRec considers ASUS ROG Strix G15 to have good portability, while the Lenovo Legion Slim 5i has only fair portability.
The most portable laptops are small, thin, and light.
Build Quality
7.8/10
7.4/10
The ASUS ROG Strix G15 and Lenovo Legion Slim 5i both have good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
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How the ASUS ROG Strix G15 and the Lenovo Legion Slim 5i compare to other laptops
"The ASUS ROG Strix G15 is a successful high-performance 15-inch laptop. The Asus ROG Strix impresses with an elaborate design and fast hardware. The latter can unleash its potential well in the large 15-inch case and achieve a decent performance boost compared to the previous generation. Especially the stunning 300 Hz display as well as the RTX 3070 and its generous TDP give gamers their money's worth. Asus didn't neglect seemingly small details, either, such as the keyboard and the maintenance options. The ROG Strix G15 offers a lot of pure performance and excellent workmanship in a 15-inch format, but connectivity leaves something to be desired."
"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 Strix G15 or the Lenovo Legion Slim 5i
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.
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.
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