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Updated January 10, 2024·
The Dell G15 5520 is somewhat less expensive and is well-suited for gaming. It has a larger 15.6-inch display but it offers lower resolution and is heavier, which impacts its portability. The Lenovo Slim Pro 9i, although more expensive, has a better display with higher resolution and brightness, being a Mini LED panel on a 14.5-inch touchscreen. It's lighter and has a longer battery life, which enhances portability. The Lenovo also has a newer GPU and more RAM, contributing to higher performance in engineering and 3D tasks. Choose the Dell for cost efficiency and gaming, or the Lenovo for superior display, portability, and high-end performance. 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 Dell G15 5520
- The Dell G15 5520 has no clear advantages over the Lenovo Slim Pro 9i.
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
- Very good overall build quality
- Good portability
Key differences
General Use
7.9
8.5
1920 x 1080
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
251.0 nits
DISPLAY BRIGHTNESS
618.0 nits
6.0 Hours
BATTERY LIFE
6.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
6.3/10
PORTABILITY SCORE
7.6/10
The Lenovo Slim Pro 9i is very good for general use, while the Dell G15 5520 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.
Engineering and Design
8.2
8.9
9.1/10
OVERALL CPU SCORE
9.0/10
7.3/10
OVERALL GPU SCORE
6.9/10
16.0 GB
RAM
32.0 GB
The Lenovo Slim Pro 9i and Dell G15 5520 are both very good for engineering and design, though the Lenovo Slim Pro 9i is somewhat better.
The Lenovo Slim Pro 9i outperforms the Dell G15 5520 for engineering and design largely due to its superior CPU, double the RAM, and a more advanced GPU, which are crucial for demanding tasks and multitasking. Additionally, the Slim Pro 9i offers a higher-resolution Mini LED screen, providing better image quality and color accuracy, important factors for design work; however, the Dell G15 also holds its own with a capable CPU, decent GPU and RAM, along with a good quality screen, though it is heavier and bulkier, making the Lenovo a better choice for those prioritizing portability and screen excellence.
Content Creation
7.9
8.5
9.1/10
OVERALL CPU SCORE
9.0/10
1920 x 1080
RESOLUTION
3072 x 1920
16.0 GB
RAM
32.0 GB
IPS
DISPLAY TECHNOLOGY
Mini LED
The Lenovo Slim Pro 9i is very good for content creation, while the Dell G15 5520 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
7.5
8.3
9.1/10
OVERALL CPU SCORE
9.0/10
16.0 GB
RAM
32.0 GB
1920 x 1080
RESOLUTION
3072 x 1920
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
The Lenovo Slim Pro 9i is very good for software development, while the Dell G15 5520 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
7.1
9.6
15.6in
SIZE
14.5in
1920 x 1080
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
165Hz
REFRESH RATE
165Hz
251.0 nits
BRIGHTNESS
618.0 nits
The Lenovo Slim Pro 9i has a better screen than the Dell G15 5520 for general use, gaming and AI, engineering and design, content creation, and software development.
If you prioritize a vibrant display and crisp image for everyday tasks and professional design work, the Lenovo Slim Pro 9i's high-resolution screen and wide color gamut support make it superior for general use and engineering. However, for gaming and 3D applications where fluid motion is crucial, the Dell G15 5520 falls short due to its lower refresh rate despite satisfactory resolution and panel type. The Lenovo faces the same challenge for gaming; its exceptional color accuracy and sharpness are less relevant when refresh rate is the bottleneck for a smooth visual experience.
Portability
Fair
Good
15.6in
SIZE
14.5in
5.5 lbs
WEIGHT
3.7 lbs
1.0in
THICKNESS
0.8in
The Lenovo Slim Pro 9i has good portability, while the Dell G15 5520 has only fair portability.
The most portable laptops are small, thin, and light.
Build Quality
7.4
8.0
The Lenovo Slim Pro 9i has very good build quality, while the Dell G15 5520 has good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,000
$1,500
$500
$1,000
$1,500
$2,000
$2,500
The Dell G15 5520 has a price of $1,000 and the Lenovo Slim Pro 9i costs $1,500.
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Key similarities
Gaming and AI
7.7
7.6
7.3/10
OVERALL GPU SCORE
6.9/10
1920 x 1080
RESOLUTION
3072 x 1920
165Hz
REFRESH RATE
165Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.7/10
FAN NOISE SCORE
8.0/10
The Dell G15 5520 and Lenovo Slim Pro 9i are both good for gaming and AI.
The Dell G15 5520, equipped with an Nvidia RTX 3060 and a 165Hz refresh rate display, is built for gamers seeking high responsiveness in fast-paced games. In contrast, the Lenovo Slim Pro 9i's more powerful Nvidia RTX 4050 and a similar 165Hz screen cater to those looking for superior graphics performance in both gaming and 3D applications, albeit in a more compact and higher-resolution form.
Battery
6.0 Hours
6.0 Hours
The Dell G15 5520 has 6 hours of battery life. The Lenovo Slim Pro 9i has 6 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.
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How the Dell G15 5520 and the Lenovo Slim Pro 9i compare to other laptops
Spec Comparison
 |  | |
| Dell G15 5520 | Lenovo Slim Pro 9i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $1,500 | ||
Release Date | |||
Release Date | May 1, 2022 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 10.7'' x 1.06'' | 12.9'' x 9.6'' x 0.85'' | |
Weight | |||
Weight | 5.55 lbs | 3.7 lbs | |
Width | |||
Width | 14.06" | 12.9" | |
Depth | |||
Depth | 10.74" | 9.64" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-12700H | Intel i7-13705H | |
RAM | |||
RAM | 16 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 0 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 6 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 75 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 14.5" | |
Display Technology | |||
Display Technology | IPS | Mini LED | |
Resolution | |||
Resolution | 1920 x 1080 | 3072 x 1920 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 251 nits | 618 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 8/10 | |
Portability Score | |||
Portability Score | 6.4/10 | 7.7/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | Yes | No | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 6.8/10 | 8/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8.5/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8.8/10 | 8/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
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 | 3 | 2 | |
USB-C ports | |||
USB-C ports | 1 | 2 | |
USB-C Charging | |||
USB-C Charging | No | Yes | |
Display Outputs | |||
Display Outputs | 2 | 3 | |
Thunderbolt Version | |||
Thunderbolt Version | 4 | 4 | |
Shopping
Dell G15 5520
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Rtings
Olivier Martin, Ryan Lim, and John Peroramas | April 2023
"The Dell G15 (2022) is a 15.6-inch budget gaming laptop, and is great for gaming. You can configure the laptop with powerful Intel 12th Gen. CPUs and various NVIDIA dedicated GPUs, all of which deliver a smooth gaming experience at 1080p. There's also a QHD 240Hz display option if you want better visuals, though you'll have to pair it with the top-end NVIDIA GeForce RTX 3070 Ti to get good frame rates. It doesn't get overly hot or loud under load, and there's no noticeable throttling on the CPU or GPU. Unfortunately, the 120Hz panel has a slow response time, causing noticeable ghosting, and it doesn't support variable refresh rate."
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."
Get a great deal on the Dell G15 5520 or the Lenovo Slim Pro 9i
About Dell
Dell is a highly recognizable American technology company, and is one of the largest personal computer vendor by market share. Their laptops are very popular for both personal and professional use, and they also own the Alienware brand which makes mid to high end gaming laptops. Their premium XPS range of laptops offer great build quality and portability, while Latitude and Precision laptops are known for reliability, repairability and performance for business users.
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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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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About the laptop team
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CEO and Laptops Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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Craig is a UK-based laptops expert. Craig works in IT, where he recommends and supports laptops and PCs for clients and has been recommending laptops on Reddit for five years.
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