A comparison of specs, key information, reviews, and best pricing from top retailers
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Company ProductName Specs
Advantages of the Dell G15 5520
- The Dell G15 5520 has no clear advantages over the Lenovo Legion Slim 7 16".
Advantages of the Lenovo Legion Slim 7 16"
- Very good for software development
- Good portability
Key differences
Screen Quality
8.2
8.7
15.6in
SIZE
16.0in
2560 x 1440
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
240Hz
REFRESH RATE
240Hz
300.0 nits
BRIGHTNESS
502.0 nits
The Lenovo Legion Slim 7 has a better screen than the Dell G15 5520 for general use, gaming and AI, engineering and design, and content creation.
PerfectRec’s screen quality scores take into account various important factors that are relevant for different use cases.
Portability
Fair
Good
15.6in
SIZE
16.0in
5.5 lbs
WEIGHT
4.4 lbs
1.0in
THICKNESS
0.6in
The Lenovo Legion Slim 7 16" has good portability, while the Dell G15 5520 has only fair portability.
The most portable laptops are small, thin, and light.
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Key similarities
General Use
8.0
8.2
2560 x 1440
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
300.0 nits
DISPLAY BRIGHTNESS
502.0 nits
7.0 Hours
BATTERY LIFE
7.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
6.3/10
PORTABILITY SCORE
7.5/10
The Lenovo Legion Slim 7 16" and Dell G15 5520 are both very 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.
Gaming and AI
8.2
8.2
8.5/10
OVERALL GPU SCORE
8.3/10
2560 x 1440
RESOLUTION
2560 x 1600
240Hz
REFRESH RATE
240Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.7/10
FAN NOISE SCORE
7.5/10
The Lenovo Legion Slim 7 16" and Dell G15 5520 are both very good for gaming and AI.
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
8.6
8.6
9.1/10
OVERALL CPU SCORE
9.1/10
8.5/10
OVERALL GPU SCORE
8.3/10
16.0 GB
RAM
16.0 GB
The Lenovo Legion Slim 7 16" and Dell G15 5520 are both very good for engineering and design.
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
8.2
8.3
9.1/10
OVERALL CPU SCORE
9.1/10
2560 x 1440
RESOLUTION
2560 x 1600
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Lenovo Legion Slim 7 16" and Dell G15 5520 are both very 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
7.7
8.0
9.1/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
2560 x 1440
RESOLUTION
2560 x 1600
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
Although they have very similar scores, PerfectRec considers Lenovo Legion Slim 7 16" to be very good for software development, while the Dell G15 5520 is good.
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.
Battery
7.0 Hours
7.0 Hours
The Dell G15 5520 has 7 hours of battery life. The Lenovo Legion Slim 7 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.
Build Quality
7.4
7.6
The Lenovo Legion Slim 7 16" 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.
Cost
$1,350
$1,344
$600
$800
$1,000
$1,200
$1,400
$1,600
$1,800
$2,000
The Dell G15 5520 has a price of $1,350 and the Lenovo Legion Slim 7 16" costs $1,344.
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How the Dell G15 5520 and the Lenovo Legion Slim 7 16" compare to other laptops
Spec Comparison
 |  | |
| Dell G15 5520 | Lenovo Legion Slim 7 16" |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,350 | $1,344 | ||
Release Date | |||
Release Date | May 1, 2022 | May 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 10.7'' x 1.06'' | 14.1'' x 10.2'' x 0.69'' | |
Weight | |||
Weight | 5.59 lbs | 4.4 lbs | |
Width | |||
Width | 14.07" | 14.08" | |
Depth | |||
Depth | 10.74" | 10.21" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-12700H | AMD Ryzen 7 7840HS | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 2 | 1 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 7 Hours | 7 Hours | |
Battery Capacity | |||
Battery Capacity | 86 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 16" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 2560 x 1440 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 240Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 300 nits | 502 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 7.6/10 | |
Portability Score | |||
Portability Score | 6.3/10 | 7.5/10 | |
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 | 8.5/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 8.8/10 | 8/10 | |
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 | 3 | |
USB-C ports | |||
USB-C ports | 1 | 2 | |
USB-C Charging | |||
USB-C Charging | No | Yes | |
Display Outputs | |||
Display Outputs | 2 | 3 | |
Thunderbolt Ports | |||
Thunderbolt Ports | 0 | 0 | |
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 Legion Slim 7 16"
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NotebookCheck
Benjamin Herzig | November 2022
"The Lenovo Legion Slim 7 is a slim Legion notebook that is just as excellent with Nvidia & Intel. However, the Legion Slim 7i slightly sullied by lacklustre battery life. You get a slim aluminium chassis, great input devices, decent port selection, fast high-quality WQXGA display and great performance. Supporting Thunderbolt 4 is one advantage of the Intel/Nvidia model tested in this review. Moreover, this variant has slightly higher CPU performance as well as better GPU performance in certain applications (e.g. CUDA-based apps). The Lenovo Legion S7i is thin, premium and performant – but less efficient than its AMD counterpart."
Get a great deal on the Dell G15 5520 or the Lenovo Legion Slim 7 16"
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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