A comparison of specs, key information, reviews, and best pricing from top retailers
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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Dell G15 5520 provides better performance for intensive tasks like 3D rendering, gaming, and engineering software with a heftier GPU, and its high-refresh-rate display enhances fast-motion visuals, making it suitable for gaming. However, it's heavier and has shorter battery life, impacting its portability. In contrast, the Lenovo IdeaPad Slim 7i is lighter, offering greater portability and longer battery life, making it a better choice for general use and mobility. It's suitable for everyday tasks with decent performance but may not handle intensive applications as well as the Dell. Essentially, choose Dell for performance-intensive tasks and gaming, and Lenovo for general use and portability. 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
- Very good for engineering and design
- Good for gaming and AI
- Good overall display quality
- Very good speakers
Advantages of the Lenovo IdeaPad Slim 7i
- Very good portability
- Very good battery life
Key differences
Gaming and AI
7.7
6.2
7.3/10
OVERALL GPU SCORE
3.7/10
1920 x 1080
RESOLUTION
1920 x 1080
165Hz
REFRESH RATE
60Hz
Yes
SUPPORTS DLSS
No
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.7/10
FAN NOISE SCORE
9.5/10
The Dell G15 5520 is good for gaming and AI, while the Lenovo IdeaPad Slim 7i is only fair.
The Dell G15 5520 typically has a more powerful GPU and a higher screen refresh rate, which are crucial for smooth gaming and efficient 3D rendering, making it a strong choice for those activities. On the other hand, the Lenovo IdeaPad Slim 7i, while still capable due to a decent CPU and screen quality, may not deliver the same level of performance in gaming and 3D tasks due to its less robust GPU and lower refresh rate.
Engineering and Design
8.2
7.1
9.1/10
OVERALL CPU SCORE
5.5/10
7.3/10
OVERALL GPU SCORE
3.7/10
16.0 GB
RAM
16.0 GB
The Dell G15 5520 is very good for engineering and design, while the Lenovo IdeaPad Slim 7i is good.
The Dell G15 5520 stands out for engineering and design use primarily due to its high-performance CPU and dedicated high-end GPU, which are paramount for intensive tasks and rendering, whereas the Lenovo IdeaPad Slim 7i, while also equipped with a capable CPU, relies on integrated graphics, which are less suited for demanding engineering software and design work. Additionally, the G15's larger screen and higher refresh rate provide a more comfortable viewing experience for detailed work, but it is less portable and has lower battery life compared to the Slim 7i, which has a brighter screen with better color accuracy and a more portable design.
Screen Quality
7.1
6.9
15.6in
SIZE
14.0in
1920 x 1080
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
60Hz
251.0 nits
BRIGHTNESS
340.0 nits
The Dell G15 5520 has a better screen than the Lenovo IdeaPad Slim 7i for gaming and AI, and content creation.
For general use, both the Dell G15 5520 and the Lenovo IdeaPad Slim 7i offer displays with sufficient resolution, panel quality, and brightness, making them suitable for everyday tasks like browsing and document editing. When it comes to engineering and design, both laptops provide good coverage of color gamuts like DCI-P3 and Adobe RGB, which are crucial for accurate color work. However, for Gaming and 3D applications, both laptops fall short as they lack high refresh rate screens, which are essential for smooth visuals in fast-paced games and animations.
Battery
6.0 Hours
11.5 Hours
The Dell G15 5520 has 6 hours of battery life. The Lenovo IdeaPad Slim 7i has 11.5 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
Fair
Very Good
15.6in
SIZE
14.0in
5.5 lbs
WEIGHT
2.9 lbs
1.0in
THICKNESS
0.5in
The Lenovo IdeaPad Slim 7i has very good portability, while the Dell G15 5520 has only fair portability.
The most portable laptops are small, thin, and light.
Cost
$1,000
$899
$400
$600
$800
$1,000
$1,200
$1,400
$1,600
The Dell G15 5520 has a price of $1,000 and the Lenovo IdeaPad Slim 7i costs $899.
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Key similarities
General Use
7.9
7.7
1920 x 1080
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
251.0 nits
DISPLAY BRIGHTNESS
340.0 nits
6.0 Hours
BATTERY LIFE
11.5 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
6.3/10
PORTABILITY SCORE
8.9/10
The Dell G15 5520 and Lenovo IdeaPad Slim 7i are both good for general use.
The Dell G15 5520, featuring a high-performance CPU and ample RAM, is well-suited for general use and even handles gaming with ease, offering a quality display and reasonable battery life but is less portable due to its size and weight. In contrast, the Lenovo IdeaPad Slim 7i, while also having a robust CPU and sufficient RAM, boasts superior battery life, screen colors, and portability, making it highly attractive for on-the-go users, though it has less storage and is not designed for gaming.
Content Creation
7.9
7.7
9.1/10
OVERALL CPU SCORE
5.5/10
1920 x 1080
RESOLUTION
1920 x 1080
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Dell G15 5520 and Lenovo IdeaPad Slim 7i 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.
Software Development
7.5
7.5
9.1/10
OVERALL CPU SCORE
5.5/10
16.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
1920 x 1080
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
The Lenovo IdeaPad Slim 7i and Dell G15 5520 are both good for software development.
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.
Build Quality
7.4
7.8
The Lenovo IdeaPad Slim 7i and Dell G15 5520 both have 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 Dell G15 5520 and the Lenovo IdeaPad Slim 7i compare to other laptops
Spec Comparison
 |  | |
| Dell G15 5520 | Lenovo IdeaPad Slim 7i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $899 | ||
Release Date | |||
Release Date | May 1, 2022 | October 1, 2020 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 10.7'' x 1.06'' | 12.6'' x 8.2'' x 0.59'' | |
Weight | |||
Weight | 5.55 lbs | 2.99 lbs | |
Width | |||
Width | 14.06" | 12.62" | |
Depth | |||
Depth | 10.74" | 8.2" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-12700H | Intel i7-1165G7 | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 4 | |
RAM Slots | |||
RAM Slots | 2 | 0 | |
Storage | |||
Storage | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 11.5 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 60.7 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 14" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 1920 x 1080 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 60Hz | |
Display Brightness | |||
Display Brightness | 251 nits | 340 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 7.8/10 | |
Portability Score | |||
Portability Score | 6.4/10 | 8.9/10 | |
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 | 9.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8.5/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8.8/10 | 7.5/10 | |
Webcam | |||
Webcam | 720p | 720p | |
Fingerprint Reader | |||
Fingerprint Reader | No | Yes | |
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 IdeaPad Slim 7i
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Dig into reviews and images
PCMag
Ted Needleman
| January 2022
"Among Lenovo's multiple laptop brands, the IdeaPad family is decidedly the one designed for consumers: people who want decent performance at a reasonable price. Consider, then, this laptop a paragon for the pickier members of that crowd. With a 14-inch touch-enabled display, a comfortable keyboard, an Evo-certified Intel Core i7 11th Generation CPU, and the latest Windows 11 operating system, the IdeaPad Slim 7i Pro ultraportable ($1,199 as tested) is a slick mainstream machine at a bit of a premium price, and quite capable for everyday tasks."
Get a great deal on the Dell G15 5520 or the Lenovo IdeaPad Slim 7i
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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