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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Dell G15 5520, priced higher, is better for gaming and engineering tasks with its more powerful Intel i7 processor and Nvidia RTX 3060 graphics. However, it has a shorter battery life, is heavier, and may be better for those who need performance over portability. On the other hand, the Lenovo IdeaPad Slim 5i is more affordable, lighter, and has a longer battery life, making it suitable for general use. Its higher resolution display with a wider aspect ratio may also benefit productivity tasks, but its integrated graphics are less suited for intensive 3D, machine learning, or gaming. 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 5i
- Good portability
Key differences
Gaming and AI
7.7
6.3
7.3/10
OVERALL GPU SCORE
3.7/10
1920 x 1080
RESOLUTION
1920 x 1200
165Hz
REFRESH RATE
60Hz
Yes
SUPPORTS DLSS
No
No
MUX SWITCH / ADVANCED OPTIMUS
No
6.7/10
FAN NOISE SCORE
7.5/10
The Dell G15 5520 is good for gaming and AI, while the Lenovo IdeaPad Slim 5i 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
8.2
7.0
9.1/10
OVERALL CPU SCORE
6.9/10
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 5i is good.
The Dell G15 5520 is better suited for engineering and design tasks due to its more powerful Intel i7 processor and dedicated Nvidia RTX 3060 graphics, which provide stronger performance for compute-intensive applications and 3D rendering. In contrast, the Lenovo IdeaPad Slim 5i, while lighter and more portable, relies on an Intel i5 processor with integrated Iris Xe graphics, which offer good but not as robust capabilities for engineering software and less-demanding design work.
Content Creation
7.9
7.4
9.1/10
OVERALL CPU SCORE
6.9/10
1920 x 1080
RESOLUTION
1920 x 1200
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Dell G15 5520 and Lenovo IdeaPad Slim 5i are both good for content creation, though the Dell G15 5520 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.
Screen Quality
7.1
6.4
15.6in
SIZE
16.0in
1920 x 1080
RESOLUTION
1920 x 1200
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
60Hz
251.0 nits
BRIGHTNESS
315.0 nits
The Dell G15 5520 has a better screen than the Lenovo IdeaPad Slim 5i for general use, gaming and AI, engineering and design, and content creation.
The Dell G15 5520 has a display that offers vivid colors and higher resolution, making it suitable for engineering and general use where clarity and color accuracy are essential, but its lower refresh rate limits its gaming and 3D performance. The Lenovo IdeaPad Slim 5i provides adequate resolution and brightness levels for day-to-day tasks and some design work, but its color range might not be wide enough for professional-grade engineering and design, and like the Dell, its refresh rate isn't optimal for gaming and 3D applications. Both laptops will serve well for everyday activities and casual design work, but serious gamers, 3D artists, or professional engineers might need to look for options with faster refresh rates and broader color gamuts.
Battery
6.0 Hours
8.0 Hours
The Dell G15 5520 has 6 hours of battery life. The Lenovo IdeaPad Slim 5i has 8 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
Good
15.6in
SIZE
16.0in
5.5 lbs
WEIGHT
4.1 lbs
1.0in
THICKNESS
0.7in
The Lenovo IdeaPad Slim 5i has good portability, while the Dell G15 5520 has only fair portability.
The most portable laptops are small, thin, and light.
Cost
$1,000
$828
$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 5i costs $828.
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Key similarities
General Use
7.9
7.5
1920 x 1080
RESOLUTION
1920 x 1200
IPS
DISPLAY TECHNOLOGY
IPS
251.0 nits
DISPLAY BRIGHTNESS
315.0 nits
6.0 Hours
BATTERY LIFE
8.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
6.3/10
PORTABILITY SCORE
7.6/10
The Dell G15 5520 and Lenovo IdeaPad Slim 5i are both good for general use.
The Dell G15 5520 offers a high-performance CPU and a dedicated graphics card, making it suitable for more demanding tasks and some gaming, but it's heavier and has shorter battery life compared to Lenovo IdeaPad Slim 5i, which is lighter and offers longer battery life for better portability and endurance, yet has a less powerful CPU and integrated graphics which are fine for everyday tasks but not for intensive applications.
Software Development
7.5
7.4
9.1/10
OVERALL CPU SCORE
6.9/10
16.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
1920 x 1200
8.5/10
KEYBOARD QUALITY SCORE
8.0/10
The Dell G15 5520 and Lenovo IdeaPad Slim 5i 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
7.6
The Lenovo IdeaPad Slim 5i 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 5i compare to other laptops
Spec Comparison
 |  | |
| Dell G15 5520 | Lenovo IdeaPad Slim 5i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $828 | ||
Release Date | |||
Release Date | May 1, 2022 | May 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 10.7'' x 1.06'' | 14'' x 9.9'' x 0.7'' | |
Weight | |||
Weight | 5.55 lbs | 4.17 lbs | |
Width | |||
Width | 14.06" | 14.02" | |
Depth | |||
Depth | 10.74" | 9.88" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-12700H | Intel i5-1335U | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 0 | |
Storage | |||
Storage | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 8 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 56.6 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 16" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 1920 x 1200 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 60Hz | |
Display Brightness | |||
Display Brightness | 251 nits | 315 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 7.6/10 | |
Portability Score | |||
Portability Score | 6.4/10 | 7.6/10 | |
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 | 7.5/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 8.5/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8.8/10 | 6.5/10 | |
Webcam | |||
Webcam | 720p | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | Yes | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | Yes | Yes | |
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 | N/A | |
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 5i
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Dig into reviews and images
HT Tech
Robin Sinha | February 2021
"The device is made for average work loads and if your work has a lot to do with online browsing, using apps that are not power-hungry and streaming videos. The looks are really good and the device in itself is not a heavy one. And with Intel 11th-gen Core processor, you might sail through most of your work without complaints."
Get a great deal on the Dell G15 5520 or the Lenovo IdeaPad Slim 5i
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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