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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Lenovo Legion Slim 5i is less expensive, and while it doesn't have as powerful a processor or graphics card as the Razer Blade 18, it still offers solid performance for general use, 3D rendering, machine learning, and engineering tasks. It's relatively light, making it easier to carry around, and has longer battery life for more usage between charges. However, the Razer Blade 18, despite its higher price, brings more power with better performance for intense engineering tasks and gaming. It also has a larger screen and higher-quality speakers and webcam. If portability and cost are important to you, the Lenovo would be the better choice, whereas if you need top performance and a bigger screen for complex tasks and gaming, go for the Razer despite its heavier build and shorter battery life. 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 Lenovo Legion Slim 5i
- Good battery life
Advantages of the Razer Blade 18
- Very good for general use
- Excellent for engineering and design
- Very good for software development
- Very good overall build quality
- Best in class speakers
- Excellent keyboard
Key differences
General Use
7.9
8.5
2560 x 1600
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
343.0 nits
DISPLAY BRIGHTNESS
524.0 nits
7.0 Hours
BATTERY LIFE
4.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
9.0/10
6.7/10
PORTABILITY SCORE
6.1/10
The Razer Blade 18 is very good for general use, while the Lenovo Legion Slim 5i is good.
The Razer Blade 18 surpasses the Lenovo Legion Slim 5i for general use with its more powerful CPU, double the RAM, and a screen with higher brightness and color accuracy, but it is heavier and has shorter battery life, affecting portability.
Gaming and AI
8.0
8.9
8.4/10
OVERALL GPU SCORE
8.9/10
2560 x 1600
RESOLUTION
2560 x 1600
165Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
Yes
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.5/10
FAN NOISE SCORE
7.2/10
The Razer Blade 18 and Lenovo Legion Slim 5i are both very good for gaming and AI, though the Razer Blade 18 is somewhat better.
The Razer Blade 18 outperforms the Lenovo Legion Slim 5i in gaming and 3D tasks, primarily because it includes a more powerful Nvidia RTX 4070 GPU, versus the RTX 4060 in the Lenovo, and offers a higher screen refresh rate of 240 Hz compared to Lenovo's 165 Hz, which translates to smoother visuals and better responsiveness during gameplay or 3D applications.
Engineering and Design
8.4
9.3
9.0/10
OVERALL CPU SCORE
9.9/10
8.4/10
OVERALL GPU SCORE
8.9/10
16.0 GB
RAM
32.0 GB
The Razer Blade 18 is excellent for engineering and design, while the Lenovo Legion Slim 5i is very good.
The Lenovo Legion Slim 5i offers a solid balance of features with a strong processor, a capable graphics card, and a high-quality display, making it very good for engineering and design, but the Razer Blade 18, with its superior processor and graphics card, twice the memory, and a significantly brighter and more color-accurate display, ranks as excellent for these demanding tasks. The Razer Blade 18 sacrifices some portability and has a shorter battery life due to its larger screen and more powerful components, which are important considerations for users who need to work on the go.
Content Creation
8.0
8.6
9.0/10
OVERALL CPU SCORE
9.9/10
2560 x 1600
RESOLUTION
2560 x 1600
16.0 GB
RAM
32.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Razer Blade 18 and Lenovo Legion Slim 5i are both very good for content creation, though the Razer Blade 18 is somewhat better.
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
7.8
8.5
9.0/10
OVERALL CPU SCORE
9.9/10
16.0 GB
RAM
32.0 GB
2560 x 1600
RESOLUTION
2560 x 1600
8.5/10
KEYBOARD QUALITY SCORE
9.0/10
The Razer Blade 18 is very good for software development, while the Lenovo Legion Slim 5i is good.
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
8.0
8.9
16.0in
SIZE
18.0in
2560 x 1600
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
343.0 nits
BRIGHTNESS
524.0 nits
The Razer Blade 18 has a better screen than the Lenovo Legion Slim 5i for general use, gaming and AI, engineering and design, content creation, and software development.
For general use, the Lenovo Legion Slim 5i provides clear, sharp images due to its resolution and bright display, which enhances viewing documents and web pages, while the Razer Blade 18 offers similar benefits with the added perk of a highly color-accurate screen. In engineering and design tasks, where precise color representation is critical, both laptops' displays support wide color gamuts, ensuring accurate color output for professional work, with the Razer Blade 18 achieving slightly better color fidelity. However, when it comes to gaming and 3D applications, the lower refresh rates on both models may lead to less fluid visuals compared to laptops specifically designed for gaming, which usually prioritize high refresh rates for smoother motion.
Battery
7.0 Hours
4.0 Hours
The Lenovo Legion Slim 5i has 7 hours of battery life. The Razer Blade 18 has 4 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
Fair
Fair
16.0in
SIZE
18.0in
5.2 lbs
WEIGHT
6.6 lbs
0.9in
THICKNESS
0.8in
The Lenovo Legion Slim 5i and Razer Blade 18 both have only fair portability, though the Lenovo Legion Slim 5i has somewhat better portability.
The most portable laptops are small, thin, and light.
Build Quality
7.4
8.5
The Razer Blade 18 has very good build quality, while the Lenovo Legion Slim 5i has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,055
$10
$0
$500
$1,000
$1,500
$2,000
The Lenovo Legion Slim 5i has a price of $1,055 and the Razer Blade 18 costs $10.
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How the Lenovo Legion Slim 5i and the Razer Blade 18 compare to other laptops
Spec Comparison
 |  | |
| Lenovo Legion Slim 5i | Razer Blade 18 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,055 | $10 | ||
Release Date | |||
Release Date | May 1, 2023 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 14.2'' x 10.3'' x 0.99'' | 15.7'' x 10.8'' x 0.86'' | |
Weight | |||
Weight | 5.29 lbs | 6.68 lbs | |
Width | |||
Width | 14.16" | 15.7" | |
Depth | |||
Depth | 10.25" | 10.8" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-13700H | Intel i9-13950HX | |
RAM | |||
RAM | 16 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 2 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 7 Hours | 4 Hours | |
Battery Capacity | |||
Battery Capacity | 80 Wh | 91.7 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 16" | 18" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 2560 x 1600 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 343 nits | 524 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 8.5/10 | |
Portability Score | |||
Portability Score | 6.7/10 | 6.2/10 | |
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 | 7.3/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8.5/10 | 9/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 7/10 | 9.5/10 | |
Webcam | |||
Webcam | 1080p | 1440p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | Yes | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 2 | 3 | |
USB-C ports | |||
USB-C ports | 2 | 2 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 3 | |
Thunderbolt Version | |||
Thunderbolt Version | N/A | 4 | |
Shopping
Lenovo Legion Slim 5i
See more
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."
Razer Blade 18
See more
Dig into reviews and images
PCMag
Matthew Buzzi | March 2023
"Razer made a powerful laptop in the Blade 18, showing off a beautiful and fast display and the same high-quality build we’ve come to expect from this product line. It’s also quite expensive, which is hardly a surprise, but bears repeating even in this price range. It’s pricier than the Scar 18 despite an inferior GPU and half the storage, so you really have to want the Blade 18’s design to justify the cost."
Get a great deal on the Lenovo Legion Slim 5i or the Razer Blade 18
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.
About Razer
Razer is an American-Singaporean technology company. Razer is best known for their Blade series laptops, well known for their strong performance and sleek design. Although Razer charges a premium price tag for their laptops, buyers can expect a stealthy laptop with clean fit and finish and strong performance. All of their models offer great portability and build quality compared to other gaming laptops.
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