A comparison of specs, key information, reviews, and best pricing from top retailers
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Company ProductName Specs
Company ProductName Specs
Advantages of the Dell Inspiron 15 3511
- The Dell Inspiron 15 3511 has no clear advantages over the Lenovo Legion Slim 5 14".
Advantages of the Lenovo Legion Slim 5 14"
- Very good for engineering and design
- Good for gaming and AI
- Very good overall display quality
- Good overall build quality
- Very good speakers
- Very good keyboard
Key differences
Gaming and AI
6.2
7.7
3.6/10
OVERALL GPU SCORE
7.3/10
1920 x 1080
RESOLUTION
2880 x 1800
60Hz
REFRESH RATE
120Hz
No
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
7.5/10
FAN NOISE SCORE
6.5/10
The Lenovo Legion Slim 5 14" is good for gaming and AI, while the Dell Inspiron 15 3511 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
7.0
8.4
4.9/10
OVERALL CPU SCORE
9.1/10
3.6/10
OVERALL GPU SCORE
7.3/10
32.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 5 14" is very good for engineering and design, while the Dell Inspiron 15 3511 is good.
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.
Software Development
7.3
7.9
4.9/10
OVERALL CPU SCORE
9.1/10
32.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
2880 x 1800
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Lenovo Legion Slim 5 14" and Dell Inspiron 15 3511 are both good for software development, though the Lenovo Legion Slim 5 14" is somewhat better.
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
6.0
8.5
15.6in
SIZE
14.5in
1920 x 1080
RESOLUTION
2880 x 1800
IPS
DISPLAY TECHNOLOGY
OLED
60Hz
REFRESH RATE
120Hz
230.0 nits
BRIGHTNESS
400.0 nits
The Lenovo Legion Slim 5 has a better screen than the Dell Inspiron 15 3511 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.
Build Quality
6.2
7.8
The Lenovo Legion Slim 5 14" has good build quality, while the Dell Inspiron 15 3511 has only fair build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$560
$1,295
$0
$500
$1,000
$1,500
$2,000
The Dell Inspiron 15 3511 has a price of $560 and the Lenovo Legion Slim 5 14" costs $1,295.
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Key similarities
General Use
7.6
7.8
1920 x 1080
RESOLUTION
2880 x 1800
IPS
DISPLAY TECHNOLOGY
OLED
230.0 nits
DISPLAY BRIGHTNESS
400.0 nits
6.5 Hours
BATTERY LIFE
7.0 Hours
6.5/10
KEYBOARD QUALITY SCORE
8.5/10
7.7/10
PORTABILITY SCORE
7.6/10
The Lenovo Legion Slim 5 14" and Dell Inspiron 15 3511 are both good for general use.
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.
Content Creation
7.5
7.9
4.9/10
OVERALL CPU SCORE
9.1/10
1920 x 1080
RESOLUTION
2880 x 1800
32.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
OLED
The Lenovo Legion Slim 5 14" and Dell Inspiron 15 3511 are both 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
6.5 Hours
7.0 Hours
The Dell Inspiron 15 3511 has 6.5 hours of battery life. The Lenovo Legion Slim 5 has 7 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
15.6in
SIZE
14.5in
3.7 lbs
WEIGHT
3.8 lbs
0.7in
THICKNESS
0.8in
The Dell Inspiron 15 3511 and Lenovo Legion Slim 5 14" both have good portability.
The most portable laptops are small, thin, and light.
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How the Dell Inspiron 15 3511 and the Lenovo Legion Slim 5 14" compare to other laptops
Spec Comparison
 |  | |
| Dell Inspiron 15 3511 | Lenovo Legion Slim 5 14" |
GENERAL | |||
|---|---|---|---|
| Price | |||
$560 | $1,295 | ||
Release Date | |||
Release Date | January 1, 2021 | February 1, 2024 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 9.3'' x 0.74'' | 12.9'' x 9.8'' x 0.82'' | |
Weight | |||
Weight | 3.7 lbs | 3.86 lbs | |
Width | |||
Width | 14.11" | 12.89" | |
Depth | |||
Depth | 9.27" | 9.81" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i5-1135G7 | AMD Ryzen 7 7840HS | |
RAM | |||
RAM | 32 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 4 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 2 | |
Storage | |||
Storage | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6.5 Hours | 7 Hours | |
Battery Capacity | |||
Battery Capacity | 41 Wh | 73.6 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 14.5" | |
Display Technology | |||
Display Technology | IPS | OLED | |
Resolution | |||
Resolution | 1920 x 1080 | 2880 x 1800 | |
Refresh Rate | |||
Refresh Rate | 60Hz | 120Hz | |
Display Brightness | |||
Display Brightness | 230 nits | 400 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 6.3/10 | 7.8/10 | |
Portability Score | |||
Portability Score | 7.8/10 | 7.6/10 | |
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 | 8/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | No | Yes | |
Number Pad | |||
Number Pad | Yes | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 3 | 3 | |
USB-C ports | |||
USB-C ports | 0 | 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 3511
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Dig into reviews and images
PCMag
Zachary Cuevas | November 2021
"The Dell Inspiron 15 3000 (3511) is a solid, if unremarkable, 15-inch budget laptop. It improves on many of the issues we had with the previous 3505 model, and with the inclusion of Windows 11, the 3511 is already a step above its competition. The lack of a USB-C port, the subpar speakers, and the dim display are drawbacks to factor in, but it's still one of the better 15-inch budget laptops on the market, especially when you consider it's under $400."
Lenovo Legion Slim 5 14"
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Dig into reviews and images
PCMag
Mark Knapp | August 2023
"The Lenovo Legion Slim 5 Gen 8 acknowledges that a gaming laptop doesn’t have to be as thick as possible and can still ensure adequate cooling when the muscles need flexing. To this end, in the Slim 5 Gen 8, it finds a neat balance of refined, trimmed-down design that still lets its internals cruise (even above their max power ratings). Lenovo then added in some high-end build quality with an altogether excellent keyboard that’s useful for both work and play."
Get a great deal on the Dell Inspiron 15 3511 or the Lenovo Legion Slim 5 14"
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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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
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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
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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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