A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Dell Inspiron 15 3520 is a budget-friendly option with decent performance for general use, a moderate screen size, and solid battery life, which makes it suitable for day-to-day activities and light productivity tasks. On the other hand, the Lenovo Legion 7 is a midrange laptop that offers significantly better performance, especially for 3D rendering, gaming, and engineering applications due to its more powerful processor and graphics card; it also has a larger, higher-resolution screen. However, the Legion 7 is less portable due to its increased weight and generally costs more. Consider the Inspiron 15 for cost savings and sufficient functionality for everyday computing, or the Legion 7 if your needs include intensive gaming, engineering software, or content creation that justifies the extra investment. 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
- The Dell Inspiron 15 3520 has no clear advantages over the Lenovo Legion 7.
Advantages of the Lenovo Legion 7
- Good for general use
- Very good for engineering and design
- Good for gaming and AI
- Good for software development
- Very good overall display quality
- Very good overall build quality
- Very good speakers
- Excellent keyboard
Key differences
General Use
6.9
7.9
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
259.0 nits
DISPLAY BRIGHTNESS
469.0 nits
6.5 Hours
BATTERY LIFE
6.5 Hours
6.5/10
KEYBOARD QUALITY SCORE
9.0/10
7.6/10
PORTABILITY SCORE
7.0/10
The Lenovo Legion 7 is good for general use, while the Dell Inspiron 15 3520 is only fair.
The Dell Inspiron 15 3520 offers modest performance in terms of CPU and RAM, suitable for routine tasks, but its lower screen quality and average portability due to a lower battery life may not cater to those needing a device for longer, on-the-go use. Conversely, the Lenovo Legion 7, with a more powerful CPU and double the RAM, excels in general use, has a higher-resolution screen, and a larger battery for extended use, but its heavier weight may reduce its portability for those who frequently travel.
Gaming and AI
6.0
7.8
3.6/10
OVERALL GPU SCORE
8.4/10
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 7 is 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
8.2
5.8/10
OVERALL CPU SCORE
7.4/10
3.6/10
OVERALL GPU SCORE
8.4/10
8.0 GB
RAM
16.0 GB
The Lenovo Legion 7 is very good for engineering and design, while the Dell Inspiron 15 3520 is only fair.
The Dell Inspiron 15 3520 is less suited for engineering and design due to its basic Intel i3 CPU, lower RAM, and less capable integrated graphics, whereas the Lenovo Legion 7 excels with its more powerful AMD Ryzen CPU, double the RAM, and a high-performance Nvidia RTX GPU, which are crucial for demanding engineering applications and design work. Moreover, the Legion's superior screen quality, with a higher resolution and color coverage, offers a better visual experience for detailed work, but it's also heavier and less portable compared to the Inspiron.
Content Creation
7.0
7.9
5.8/10
OVERALL CPU SCORE
7.4/10
1920 x 1080
RESOLUTION
2560 x 1600
8.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Lenovo Legion 7 and Dell Inspiron 15 3520 are both good for content creation, though the Lenovo Legion 7 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
7.6
5.8/10
OVERALL CPU SCORE
7.4/10
8.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
2560 x 1600
6.5/10
KEYBOARD QUALITY SCORE
9.0/10
The Lenovo Legion 7 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
8.3
15.6in
SIZE
16.0in
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
120Hz
REFRESH RATE
165Hz
259.0 nits
BRIGHTNESS
469.0 nits
The Lenovo Legion 7 has a better screen than the Dell Inspiron 15 3520 for general use, gaming and AI, engineering and design, content creation, and software development.
For general use, the Dell Inspiron's screen provides adequate resolution and brightness, but it may not be as sharp or vivid as higher-end models. The Lenovo Legion's screen, offering better resolution and brightness, makes it more suitable for detailed work like engineering and design with richer color accuracy. However, both laptops have displays with lower refresh rates, which aren't ideal for smooth visuals required in fast-paced 3D games.
Portability
Good
Good
15.6in
SIZE
16.0in
3.6 lbs
WEIGHT
5.5 lbs
0.8in
THICKNESS
0.8in
The Dell Inspiron 15 3520 and Lenovo Legion 7 both have good portability, though the Dell Inspiron 15 3520 has somewhat better portability.
The most portable laptops are small, thin, and light.
Build Quality
6.2
8.5
The Lenovo Legion 7 has very 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
$335
$1,500
$0
$500
$1,000
$1,500
$2,000
$2,500
The Dell Inspiron 15 3520 has a price of $335 and the Lenovo Legion 7 costs $1,500.
Let Us Help Find Your Perfect Laptop
Find your new laptop
Key similarities
Battery
6.5 Hours
6.5 Hours
The Dell Inspiron 15 3520 has 6.5 hours of battery life. The Lenovo Legion 7 has 6.5 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.
Give feedback
We’re constantly working to improve.
How the Dell Inspiron 15 3520 and the Lenovo Legion 7 compare to other laptops
Spec Comparison
 |  | |
| Dell Inspiron 15 3520 | Lenovo Legion 7 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$335 | $1,500 | ||
Release Date | |||
Release Date | May 1, 2022 | May 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 9.3'' x 0.83'' | 14'' x 10.3'' x 0.86'' | |
Weight | |||
Weight | 3.65 lbs | 5.5 lbs | |
Width | |||
Width | 14.11" | 14.01" | |
Depth | |||
Depth | 9.27" | 10.27" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i3-1215U | AMD Ryzen 7 5800H | |
RAM | |||
RAM | 8 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 4 | |
RAM Slots | |||
RAM Slots | 2 | 2 | |
Storage | |||
Storage | 256 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6.5 Hours | 6.5 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 | 469 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 6.3/10 | 8.5/10 | |
Portability Score | |||
Portability Score | 7.7/10 | 7/10 | |
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 | 9/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 6.5/10 | 8.8/10 | |
Webcam | |||
Webcam | 720p | 720p | |
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 | 3 | |
USB-C ports | |||
USB-C ports | 1 | 3 | |
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
See more
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 7
See more
Dig into reviews and images
NotebookCheck
Andreas Osthoff | September 2022
"The Lenovo Legion 7 is a fast 16-inch gamer with 165 Hz display. The new Lenovo Legion 7 is a very good gaming notebook that, despite its comparatively compact compact 16-inch case, does not have to do without the most powerful components. Thanks to good cooling, no compromises are made in terms of performance. Both the Core i9-12900HX and the GeForce RTX 3080 Ti perform at a very high level."
Get a great deal on the Dell Inspiron 15 3520 or the Lenovo Legion 7
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.
Give feedback
We're constantly perfecting our model
Laptop guides you might be interested in
More comparisons for you
Compare Dell Inspiron 15 3520 vs. HP 14" Laptop
VS
Compare Dell Inspiron 15 3520 vs. Acer Aspire 3 15
VS
Compare Dell Inspiron 15 3520 vs. HP 250 G10
VS
Compare Lenovo Legion 7 vs. ASUS Zenbook Duo (2024)
VS
Compare Lenovo Legion 7 vs. ASUS ROG Strix G15 Advantage Edition
VS
Compare Lenovo Legion 7 vs. Lenovo Legion Pro 5i (2024)
VS
FAQs
FAQs about laptops
Why trust us
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.
By the numbers
380
Laptops evaluated
48,640
Laptops stats compiled
13
Proprietary Laptops ratings developed
97,095
Recommendations made
21,038
Consumer hours saved
About the laptop team
Joe Golden, Ph.D
CEO and Laptops Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
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.
Craig Russell
Laptops Expert
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.
Featured in
