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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Lenovo Slim Pro 9i offers superior general use and engineering performance and comes with higher storage capacity and more RAM which is great for multitasking and intensive tasks. It has a higher screen pixel density and color accuracy, making it better for professionals in visual fields. The Razer Blade 15, on the other hand, has a stronger GPU, making it better suited for gaming, 3D rendering, and machine learning tasks. It also has a faster refresh rate which benefits fast-paced gaming. If you prioritize portability, the Lenovo is lighter and has a slightly better battery life. However, the Razer Blade 15 has a larger screen and an RGB backlit keyboard, which might appeal to gamers. Consider the Lenovo Slim Pro 9i if your work involves lots of multitasking and visual tasks; choose the Razer Blade 15 for more demanding graphics tasks and gaming. 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 Slim Pro 9i
- Very good for general use
- Very good for software development
- Best in class overall display quality
- Good battery life
Advantages of the Razer Blade 15
- Very good for gaming and AI
- Excellent keyboard
Key differences
General Use
8.5
7.9
3072 x 1920
RESOLUTION
2560 x 1440
Mini LED
DISPLAY TECHNOLOGY
IPS
618.0 nits
DISPLAY BRIGHTNESS
271.0 nits
6.0 Hours
BATTERY LIFE
5.0 Hours
8.0/10
KEYBOARD QUALITY SCORE
9.0/10
7.6/10
PORTABILITY SCORE
7.7/10
The Lenovo Slim Pro 9i is very good for general use, while the Razer Blade 15 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.
Software Development
8.3
7.7
9.0/10
OVERALL CPU SCORE
9.0/10
32.0 GB
RAM
16.0 GB
3072 x 1920
RESOLUTION
2560 x 1440
8.0/10
KEYBOARD QUALITY SCORE
9.0/10
The Lenovo Slim Pro 9i is very good for software development, while the Razer Blade 15 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
9.6
8.2
14.5in
SIZE
15.6in
3072 x 1920
RESOLUTION
2560 x 1440
Mini LED
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
618.0 nits
BRIGHTNESS
271.0 nits
The Lenovo Slim Pro 9i has a better screen than the Razer Blade 15 for general use, gaming and AI, engineering and design, software development, and content creation.
For general use, the Lenovo Slim Pro 9i offers a sharp, bright display with vibrant colors, making it excellent for tasks such as browsing, document editing, and media consumption. Engineering and design professionals benefit from the wide color gamuts on the Lenovo, as accurate color representation is crucial for tasks such as photo editing, graphic design, and CAD work. However, for gaming and 3D applications, where fast-moving visuals are common, the Razer Blade 15's lower refresh rate makes it less ideal compared to options with higher refresh rates that offer smoother motion and better responsiveness.
Cost
$1,600
$2,500
$500
$1,000
$1,500
$2,000
$2,500
$3,000
$3,500
$4,000
The Lenovo Slim Pro 9i has a price of $1,600 and the Razer Blade 15 costs $2,500.
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Key similarities
Gaming and AI
7.6
8.0
6.9/10
OVERALL GPU SCORE
8.0/10
3072 x 1920
RESOLUTION
2560 x 1440
165Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
8.0/10
FAN NOISE SCORE
7.0/10
Although they have very similar scores, PerfectRec considers Razer Blade 15 to be very good for gaming and AI, while the Lenovo Slim Pro 9i is good.
The Razer Blade 15 stands out for gaming and 3D applications primarily due to its superior GPU, the Nvidia RTX 3070 Ti, which is more powerful than the Lenovo Slim Pro 9i's Nvidia RTX 4050, providing better graphic performance for demanding tasks.
Engineering and Design
8.9
8.5
9.0/10
OVERALL CPU SCORE
9.0/10
6.9/10
OVERALL GPU SCORE
8.0/10
32.0 GB
RAM
16.0 GB
The Lenovo Slim Pro 9i and Razer Blade 15 are both very good for engineering and design.
The Lenovo Slim Pro 9i excels in engineering and design due to its high RAM capacity for multitasking, a top-tier CPU for intensive tasks, a capable GPU, and an outstanding Mini LED screen which enhances visual precision, contrast, and color accuracy.
Content Creation
8.5
8.0
9.0/10
OVERALL CPU SCORE
9.0/10
3072 x 1920
RESOLUTION
2560 x 1440
32.0 GB
RAM
16.0 GB
Mini LED
DISPLAY TECHNOLOGY
IPS
The Lenovo Slim Pro 9i and Razer Blade 15 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.
Battery
6.0 Hours
5.0 Hours
The Lenovo Slim Pro 9i has 6 hours of battery life. The Razer Blade 15 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.
Portability
Good
Good
14.5in
SIZE
15.6in
3.7 lbs
WEIGHT
4.4 lbs
0.8in
THICKNESS
0.6in
The Razer Blade 15 and Lenovo Slim Pro 9i both have good portability.
The most portable laptops are small, thin, and light.
Build Quality
8.0
8.5
The Razer Blade 15 and Lenovo Slim Pro 9i both have very 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 Lenovo Slim Pro 9i and the Razer Blade 15 compare to other laptops
Spec Comparison
 |  | |
| Lenovo Slim Pro 9i | Razer Blade 15 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,600 | $2,500 | ||
Release Date | |||
Release Date | February 1, 2023 | January 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 12.9'' x 9.6'' x 0.85'' | 14'' x 9.3'' x 0.67'' | |
Weight | |||
Weight | 3.7 lbs | 4.4 lbs | |
Width | |||
Width | 12.9" | 13.98" | |
Depth | |||
Depth | 9.64" | 9.25" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-13705H | Intel i7-12800H | |
RAM | |||
RAM | 32 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 2 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 5 Hours | |
Battery Capacity | |||
Battery Capacity | 75 Wh | 80 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 14.5" | 15.6" | |
Display Technology | |||
Display Technology | Mini LED | IPS | |
Resolution | |||
Resolution | 3072 x 1920 | 2560 x 1440 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 618 nits | 271 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8/10 | 8.5/10 | |
Portability Score | |||
Portability Score | 7.7/10 | 7.7/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | No | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 8/10 | 7/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8/10 | 9/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8/10 | 8/10 | |
Webcam | |||
Webcam | 1080p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | 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 | 4 | 4 | |
Shopping
Lenovo Slim Pro 9i
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Dig into reviews and images
PCWorld
Matthew S. Smith | August 2023
"The Lenovo Slim Pro 9i is an impressive laptop with a brilliant Mini-LED display, a powerful 100-watt version of Nvidia RTX 4050 graphics, and excellent connectivity. Having run the Cinebench benchmark again, we were impressed with the CPU performance. That makes the Slim Pro 9i is an easy recommendation, especially for those who care about GPU and CPU performance. It’s also a fantastic choice if you frequently view HDR movies and games on your laptop."
Razer Blade 15
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Dig into reviews and images
NotebookCheck
Allen Ngo | March 2022
"The 2022 Blade 15 offers roughly 15 to 25 percent faster graphics performance and 20 percent faster CPU performance over last year's Core i7-11800H and RTX 3080 model. Thankfully, the system doesn't need to run noticeably louder or warmer to achieve faster results, but both power consumption and battery life take a hit. The higher consumption in particular appears to be a trend amongst many 12th gen Core laptops including the Schenker Uniwill Technology GM7AG8P or MSI Vector GP66 when compared to their previous generation counterparts. We're also glad to not see below-average CPU performance which was the case for the 10th gen Core i7-10875H model."
Get a great deal on the Lenovo Slim Pro 9i or the Razer Blade 15
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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