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What we think
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Updated January 10, 2024·
The Lenovo Slim Pro 9i generally costs less and offers higher screen resolution, more memory, and a Mini LED touchscreen with a higher pixel density. It's lighter and has a longer battery life, making it more portable and suitable for general use with good performance in engineering and 3D/machine learning tasks, though its gaming performance is good but not the main focus. The MSI Stealth GS66 has a higher price tag, with a focus on gaming aesthetic and hardware ray tracing for an immersive experience. Its powerful components are well-suited for gaming, engineering, and 3D/machine learning tasks, but it has less storage and memory, a lower resolution IPS screen, and a shorter battery life. It's heavier, yet it handles heat well due to a higher fan noise that might be distracting. If portability and screen quality for general use are your priorities, lean towards the Lenovo, but if gaming performance and a display with a higher refresh rate are more important, consider the MSI. 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
- Very good for content creation
- Best in class overall display quality
- Good battery life
Advantages of the MSI Stealth GS66
- The MSI Stealth GS66 has no clear advantages over the Lenovo Slim Pro 9i.
Key differences
General Use
8.5
7.7
3072 x 1920
RESOLUTION
1920 x 1080
Mini LED
DISPLAY TECHNOLOGY
IPS
618.0 nits
DISPLAY BRIGHTNESS
280.0 nits
6.0 Hours
BATTERY LIFE
5.5 Hours
8.0/10
KEYBOARD QUALITY SCORE
8.5/10
7.6/10
PORTABILITY SCORE
7.5/10
The Lenovo Slim Pro 9i is very good for general use, while the MSI Stealth GS66 is good.
The Lenovo Slim Pro 9i excels in general use, thanks to its high-quality screen, large RAM, and strong CPU, which guarantee smooth performance and a sharp visual experience, supported by a solid build and key features like a backlit keyboard and touchscreen. Although the MSI Stealth GS66 also offers a powerful CPU and good quality screen, it is more tailored towards gaming, as suggested by the inclusion of a high-end GPU and a higher refresh rate screen, but it has less RAM and storage than the Lenovo, which could affect multitasking and data handling for non-gaming purposes.
Engineering and Design
8.9
8.2
9.0/10
OVERALL CPU SCORE
9.1/10
6.9/10
OVERALL GPU SCORE
7.8/10
32.0 GB
RAM
16.0 GB
The Lenovo Slim Pro 9i and MSI Stealth GS66 are both very good for engineering and design, though the Lenovo Slim Pro 9i is somewhat better.
The Lenovo Slim Pro 9i excels in engineering and design due to its superior CPU and double the RAM of the MSI Stealth GS66, complimented by a high-quality screen and a professional-grade GPU fit for demanding tasks. The MSI Stealth GS66, with a slightly less powerful CPU and less RAM, is still very capable with a powerful GPU and a larger screen, but its engineering and design performance is not as robust as the Lenovo's.
Content Creation
8.5
7.7
9.0/10
OVERALL CPU SCORE
9.1/10
3072 x 1920
RESOLUTION
1920 x 1080
32.0 GB
RAM
16.0 GB
Mini LED
DISPLAY TECHNOLOGY
IPS
The Lenovo Slim Pro 9i is very good for content creation, while the MSI Stealth GS66 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
8.3
7.5
9.0/10
OVERALL CPU SCORE
9.1/10
32.0 GB
RAM
16.0 GB
3072 x 1920
RESOLUTION
1920 x 1080
8.0/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Slim Pro 9i is very good for software development, while the MSI Stealth GS66 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
8.1
14.5in
SIZE
15.6in
3072 x 1920
RESOLUTION
1920 x 1080
Mini LED
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
360Hz
618.0 nits
BRIGHTNESS
280.0 nits
The Lenovo Slim Pro 9i has a better screen than the MSI Stealth GS66 for general use, gaming and AI, engineering and design, software development, and content creation.
For general use, the Lenovo Slim Pro 9i excels due to its high-quality panel type, resolution, and brightness levels, which ensure clear and vibrant visuals for everyday activities like browsing and streaming. In engineering and design, the same laptop stands out because it covers a wider range of colors, providing accuracy that professionals need for color-critical work. However, for gaming and 3D applications, the MSI Stealth GS66, despite having good attributes for general use and design, falls short due to a lower refresh rate, which is key for a smooth visual experience in fast-paced scenarios.
Cost
$1,500
$1,799
$500
$1,000
$1,500
$2,000
$2,500
$3,000
The Lenovo Slim Pro 9i has a price of $1,500 and the MSI Stealth GS66 costs $1,799.
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Key similarities
Gaming and AI
7.6
7.8
6.9/10
OVERALL GPU SCORE
7.8/10
3072 x 1920
RESOLUTION
1920 x 1080
165Hz
REFRESH RATE
360Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
8.0/10
FAN NOISE SCORE
7.5/10
The MSI Stealth GS66 and Lenovo Slim Pro 9i are both good for gaming and AI.
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.
Battery
6.0 Hours
5.5 Hours
The Lenovo Slim Pro 9i has 6 hours of battery life. The MSI Stealth GS66 has 5.5 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
4.6 lbs
0.8in
THICKNESS
0.7in
The Lenovo Slim Pro 9i and MSI Stealth GS66 both have good portability.
The most portable laptops are small, thin, and light.
Build Quality
8.0
8.0
The Lenovo Slim Pro 9i and MSI Stealth GS66 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 MSI Stealth GS66 compare to other laptops
Spec Comparison
 |  | |
| Lenovo Slim Pro 9i | MSI Stealth GS66 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,500 | $1,799 | ||
Release Date | |||
Release Date | February 1, 2023 | April 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 12.9'' x 9.6'' x 0.85'' | 14.2'' x 9.7'' x 0.71'' | |
Weight | |||
Weight | 3.7 lbs | 4.63 lbs | |
Width | |||
Width | 12.9" | 14.17" | |
Depth | |||
Depth | 9.64" | 9.65" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-13705H | Intel i7-12700H | |
RAM | |||
RAM | 32 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 2 | |
Storage | |||
Storage | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 5.5 Hours | |
Battery Capacity | |||
Battery Capacity | 75 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 14.5" | 15.6" | |
Display Technology | |||
Display Technology | Mini LED | IPS | |
Resolution | |||
Resolution | 3072 x 1920 | 1920 x 1080 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 360Hz | |
Display Brightness | |||
Display Brightness | 618 nits | 280 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8/10 | 8/10 | |
Portability Score | |||
Portability Score | 7.7/10 | 7.5/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | No | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 8/10 | 7.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8/10 | 8.5/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8/10 | 8/10 | |
Webcam | |||
Webcam | 1080p | 720p | |
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 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 3 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 4 | |
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."
MSI Stealth GS66
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Dig into reviews and images
NotebookCheck
Florian Glaser | February 2022
"The MSI Stealth GS66 is powerful enough for QHD. The Core i7-12700H and the GeForce RTX 3070 Ti found in the 12UGS model that we tested run all modern games smoothly in the native QHD resolution. The 15-inch display is very fast with its 240 Hz refresh rate, and it also offers a great color space (almost 100% DCI-P3) on top of that, which should please gamers as well as content creators, although we would have still wished for a higher brightness. Case, input devices, and connectivity (Thunderbolt 4) are at a good level. However, among other things, the GS66 loses points due to the high temperature development in 3D mode and its poor webcam."
Get a great deal on the Lenovo Slim Pro 9i or the MSI Stealth GS66
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 MSI
MSI, also known as Micro-Star International, is a Taiwanese technology corporation. MSI is known for their wide range of gaming devices. Their series include the entry-level Cyborg/Thin and Sword/Katana series, the mid-range Bravo/Delta and Crosshair/Pulse series, and their high-end Vector, Raider, Stealth, and Titan GT series. At every performance level, MSI offers a variety of devices with varying balances between performance, battery life, weight, and price, making them a solid option to consider at every price point.
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