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The PerfectRec laptop team Learn more
Updated June 22, 2024·
For everyday tasks, the Dell Inspiron 15 3520 is a cost-effective choice with a decent performance and a good battery life, making it suitable for general use on the go. However, if you're looking for a powerhouse that excels in gaming, 3D rendering, and machine learning, the Lenovo Legion Pro 5i (2024) is the way to go, despite its higher price tag. It offers superior performance with its dedicated Nvidia RTX 4070 GPU and higher resolution display, which is also great for engineering tasks that demand more screen real estate and color accuracy. Keep in mind that the Legion Pro 5i is less portable due to its larger size and weight, and has a shorter battery life, making it more suitable for stationary use. 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 Inspiron 15 3520
- Good portability
- Good battery life
Advantages of the Lenovo Legion Pro 5i (2024)
- Good for general use
- Very good for engineering and design
- Very good for gaming and AI
- Good for software development
- Very good overall display quality
- Good overall build quality
- Good speakers
- Very good keyboard
Key differences
General Use
6.9
7.8
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
259.0 nits
DISPLAY BRIGHTNESS
368.0 nits
6.5 Hours
BATTERY LIFE
3.5 Hours
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
7.6/10
PORTABILITY SCORE
6.6/10
The Lenovo Legion Pro 5i (2024) is good for general use, while the Dell Inspiron 15 3520 is only fair.
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.
Gaming and AI
6.0
8.5
3.6/10
OVERALL GPU SCORE
8.9/10
1920 x 1080
RESOLUTION
2560 x 1600
120Hz
REFRESH RATE
165Hz
No
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
7.5/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion Pro 5i (2024) is very good for gaming and AI, while the Dell Inspiron 15 3520 is only fair.
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.
Engineering and Design
6.3
8.7
5.8/10
OVERALL CPU SCORE
9.8/10
3.6/10
OVERALL GPU SCORE
8.9/10
8.0 GB
RAM
16.0 GB
The Lenovo Legion Pro 5i (2024) is very good for engineering and design, while the Dell Inspiron 15 3520 is only fair.
PerfectRec’s Engineering and Design Score takes into account the many different features of the laptop that make it more or less suitable for graphic design and 3D rendering work.
Content Creation
7.0
7.9
5.8/10
OVERALL CPU SCORE
9.8/10
1920 x 1080
RESOLUTION
2560 x 1600
8.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Lenovo Legion Pro 5i (2024) and Dell Inspiron 15 3520 are both good for content creation, though the Lenovo Legion Pro 5i (2024) 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
6.7
7.7
5.8/10
OVERALL CPU SCORE
9.8/10
8.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
2560 x 1600
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Pro 5i (2024) is good for software development, while the Dell Inspiron 15 3520 is only fair.
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
6.8
8.1
15.6in
SIZE
16.0in
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
120Hz
REFRESH RATE
165Hz
259.0 nits
BRIGHTNESS
368.0 nits
The Lenovo Legion Pro 5i has a better screen than the Dell Inspiron 15 3520 for general use, gaming and AI, engineering and design, content creation, and software development.
PerfectRec’s screen quality scores take into account various important factors that are relevant for different use cases.
Battery
6.5 Hours
3.5 Hours
The Dell Inspiron 15 3520 has 6.5 hours of battery life. The Lenovo Legion Pro 5i has 3.5 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
Fair
15.6in
SIZE
16.0in
3.6 lbs
WEIGHT
5.6 lbs
0.8in
THICKNESS
0.9in
The Dell Inspiron 15 3520 has good portability, while the Lenovo Legion Pro 5i (2024) has only fair portability.
The most portable laptops are small, thin, and light.
Build Quality
6.2
7.4
The Lenovo Legion Pro 5i (2024) has good build quality, while the Dell Inspiron 15 3520 has only fair build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$329
$1,500
$0
$500
$1,000
$1,500
$2,000
$2,500
The Dell Inspiron 15 3520 has a price of $329 and the Lenovo Legion Pro 5i (2024) costs $1,500.
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How the Dell Inspiron 15 3520 and the Lenovo Legion Pro 5i (2024) compare to other laptops
Spec Comparison
 |  | |
| Dell Inspiron 15 3520 | Lenovo Legion Pro 5i (2024) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$329 | $1,500 | ||
Release Date | |||
Release Date | May 1, 2022 | January 1, 2024 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 9.3'' x 0.83'' | 14.3'' x 10.3'' x 0.97'' | |
Weight | |||
Weight | 3.65 lbs | 5.6 lbs | |
Width | |||
Width | 14.11" | 14.31" | |
Depth | |||
Depth | 9.27" | 10.25" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i3-1215U | Intel i7-14700HX | |
RAM | |||
RAM | 8 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 2 | |
Storage | |||
Storage | 256 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6.5 Hours | 3.5 Hours | |
Battery Capacity | |||
Battery Capacity | 41 Wh | 80 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 16" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 120Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 259 nits | 368 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 6.3/10 | 7.4/10 | |
Portability Score | |||
Portability Score | 7.7/10 | 6.6/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | No | Yes | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 7.5/10 | 6.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 6.5/10 | 8.5/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 6.5/10 | 7/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | No | Yes | |
Number Pad | |||
Number Pad | Yes | Yes | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 2 | 4 | |
USB-C ports | |||
USB-C ports | 1 | 2 | |
USB-C Charging | |||
USB-C Charging | No | Yes | |
Display Outputs | |||
Display Outputs | 1 | 3 | |
Thunderbolt Ports | |||
Thunderbolt Ports | 0 | 0 | |
Shopping
Dell Inspiron 15 3520
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Dig into reviews and images
PCMag
Mark Knapp | January 2023
"Dell's Inspiron 15 (3525) is a peppy-enough and affordable-enough home or remote work machine, but it's not very ambitious; it does little to go beyond the basics. More the concern: It’s readily overshadowed by a number of machines that outperform and outclass it. Even if the Inspiron can get the job done today, its competition has the mettle to keep doing the job tomorrow in a way the Inspiron simply can’t promise. Plus, those alternatives are much more enjoyable after work."
Lenovo Legion Pro 5i (2024)
See more
Dig into reviews and images
PCMag
Brian Westover | August 2023
"The midpriced Lenovo Legion Pro 5i Gen 8 follows some of our favorite gaming machines, including last year's model and the higher-end Legion Pro 7i Gen 8 tested earlier this year. But pedigree doesn't count for much in the computer world, and gaming laptops require a certain level of power and graphics performance to justify their prices. The Pro 5i Gen 8 just doesn't do that, offering middling CPU and GPU performance rather than the sort of muscle that would make it a great value."
Get a great deal on the Dell Inspiron 15 3520 or the Lenovo Legion Pro 5i (2024)
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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