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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Dell G15 5520 is often a more budget-friendly option compared to the Lenovo Legion Slim 7, offering solid gaming and general performance capabilities. With this Dell model, you may sacrifice some portability due to its heavier weight and larger dimensions. The Lenovo, being slimmer and lighter, can be more suitable for on-the-go use without compromising much on power; it's equipped with similar gaming capabilities. The Lenovo also has an edge in battery capacity, which may translate to longer use away from a power outlet. In sum, if price and robust usage are primary concerns, the Dell could be preferable, while the Lenovo stands out for better battery life 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
Advantages of the Lenovo Legion Slim 7 15.6"
- Good portability
Key differences
Screen Quality
7.1
7.7
15.6in
SIZE
15.6in
1920 x 1080
RESOLUTION
1920 x 1080
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
165Hz
251.0 nits
BRIGHTNESS
350.0 nits
The Dell G15 5520 has a better screen than the Lenovo Legion Slim 7 for content creation, while the Lenovo Legion Slim 7 has a better screen for general use, gaming and AI, and engineering and design.
The Dell G15 5520 and Lenovo Legion Slim 7 have displays that offer clear and sharp images with good brightness, making them suitable for general activities like browsing, watching videos, or document editing. Their screens also cover a wider range of colors which is crucial for accuracy in engineering and design tasks where precise color representation matters. However, both laptops have lower refresh rates that are less than ideal for gaming and 3D works where smoother motion and quick image renderings are key to an immersive experience.
Battery
6.0 Hours
9.0 Hours
The Dell G15 5520 has 6 hours of battery life. The Lenovo Legion Slim 7 has 9 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
15.6in
5.5 lbs
WEIGHT
4.1 lbs
1.0in
THICKNESS
0.6in
The Lenovo Legion Slim 7 15.6" has good portability, while the Dell G15 5520 has only fair portability.
The most portable laptops are small, thin, and light.
Cost
$1,000
$1,200
$400
$600
$800
$1,000
$1,200
$1,400
$1,600
$1,800
The Dell G15 5520 has a price of $1,000 and the Lenovo Legion Slim 7 15.6" costs $1,200.
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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
350.0 nits
6.0 Hours
BATTERY LIFE
9.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
6.3/10
PORTABILITY SCORE
7.6/10
The Dell G15 5520 and Lenovo Legion Slim 7 15.6" are both good for general use.
The Dell G15 5520 offers strong CPU performance and plenty of storage for everyday tasks, while its decent battery life and solid build make it reliable for general use. The Lenovo Legion Slim 7, though, combines ample RAM and powerful CPU with a superior battery life in a much lighter package, and its high-quality screen with good color coverage adds to its appeal for both work and entertainment.
Gaming and AI
7.7
7.4
7.3/10
OVERALL GPU SCORE
7.1/10
1920 x 1080
RESOLUTION
1920 x 1080
165Hz
REFRESH RATE
165Hz
Yes
SUPPORTS DLSS
Yes
No
MUX SWITCH / ADVANCED OPTIMUS
Yes
6.7/10
FAN NOISE SCORE
7.5/10
The Dell G15 5520 and Lenovo Legion Slim 7 15.6" are both good for gaming and AI.
Since I encountered a technical issue while trying to access the document, I am unable to provide specific details about the Dell G15 5520 and Lenovo Legion Slim 7 15.6". However, in general terms, I can offer typical reasons why similar laptops would be good for gaming and 3D.
The Dell G15 5520 and Lenovo Legion Slim 7 15.6" are considered good for gaming and 3D because they typically have strong GPUs which are very important for rendering high-quality graphics and ensuring smooth gameplay. Moreover, these laptops would have high screen refresh rates, enhancing the gaming experience by providing fluid motion and reducing motion blur, and while their CPUs and screen quality are also important for overall performance and visual experience, they are somewhat less critical than the GPU and refresh rate for gaming and 3D tasks.
Engineering and Design
8.2
7.8
9.1/10
OVERALL CPU SCORE
7.4/10
7.3/10
OVERALL GPU SCORE
7.1/10
16.0 GB
RAM
16.0 GB
Although they have very similar scores, PerfectRec considers Dell G15 5520 to be very good for engineering and design, while the Lenovo Legion Slim 7 15.6" is good.
The Dell G15 5520 stands out for engineering and design use due to its powerful Intel i7 CPU and ample RAM, which support demanding software, complemented by a strong Nvidia RTX 3060 GPU that excels in rendering tasks. Conversely, the Lenovo Legion Slim 7 shines with its higher screen quality offering excellent color range and brightness, in addition to featuring similar RAM and GPU specs; however, it is noted for its superior portability and quieter operating noise, making it a more mobile and less intrusive option.
Content Creation
7.9
7.7
9.1/10
OVERALL CPU SCORE
7.4/10
1920 x 1080
RESOLUTION
1920 x 1080
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
The Dell G15 5520 and Lenovo Legion Slim 7 15.6" 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
7.4/10
16.0 GB
RAM
16.0 GB
1920 x 1080
RESOLUTION
1920 x 1080
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
The Dell G15 5520 and Lenovo Legion Slim 7 15.6" 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 Legion Slim 7 15.6" 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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We’re constantly working to improve.
How the Dell G15 5520 and the Lenovo Legion Slim 7 15.6" compare to other laptops
Spec Comparison
 |  | |
| Dell G15 5520 | Lenovo Legion Slim 7 15.6" |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $1,200 | ||
Release Date | |||
Release Date | May 1, 2022 | May 1, 2022 | |
Overall Dimensions | |||
Overall Dimensions | 14.1'' x 10.7'' x 1.06'' | 14'' x 9.9'' x 0.69'' | |
Weight | |||
Weight | 5.55 lbs | 4.19 lbs | |
Width | |||
Width | 14.06" | 14.02" | |
Depth | |||
Depth | 10.74" | 9.92" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i7-12700H | AMD Ryzen 7 5800H | |
RAM | |||
RAM | 16 GB | 16 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 4 | |
RAM Slots | |||
RAM Slots | 2 | 1 | |
Storage | |||
Storage | 1024 GB | 512 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6 Hours | 9 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 71 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 15.6" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 1920 x 1080 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 251 nits | 350 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 | Yes | |
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 | 720p | |
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 | 2 | |
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 Legion Slim 7 15.6"
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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 15.6"
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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