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What we think
The PerfectRec laptop team Learn more
Updated January 10, 2024·
The Dell G15 5520 offers a good balance of performance and price, making it suitable for general use and gaming but has a shorter battery life and is heavier than the Lenovo Legion Slim 7. The Lenovo Legion Slim 7, on the other hand, has a higher resolution screen with better color accuracy and a more portable design due to its lighter weight and longer battery life, which might appeal more to professionals in fields like design or video editing. If high performance in 3D applications and machine learning is critical, and you value a more vibrant display and portability, the Lenovo is the better choice, albeit at a higher cost. 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
- 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 general use
- Very good for gaming and AI
- Very good for software development
- Very good for content creation
- Very good overall display quality
- Good portability
Key differences
Gaming and AI
7.7
8.2
7.3/10
OVERALL GPU SCORE
8.3/10
1920 x 1080
RESOLUTION
2560 x 1600
165Hz
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" is very good for gaming and AI, while the Dell G15 5520 is good.
There appears to be a technical issue that prevents me from searching the document for the required information. However, I can provide general advice. The Lenovo Legion Slim 7 16" likely offers a better overall gaming and 3D experience due to a higher-end GPU and perhaps superior screen refresh rate compared to the Dell G15 5520, which also matters significantly for smooth gameplay. While both laptops may have capable CPUs and screen quality, these factors are less critical, and the Lenovo's edge in the two most important factors for gaming—GPU power and screen refresh rate—likely makes it the preferred choice for demanding gaming and 3D tasks.
Screen Quality
7.1
8.7
15.6in
SIZE
16.0in
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
165Hz
REFRESH RATE
240Hz
251.0 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, content creation, and software development.
The Dell G15 5520's screen provides sharp images and bright colors, making it suitable for everyday tasks and professional design work that requires precise color representation. However, the refresh rate on this model is lower, which can result in less smooth motion, detracting from the gaming and 3D experience. The Lenovo Legion Slim 7 16", with its excellent color accuracy and wider color gamut coverage, excels for detailed engineering and design activities, while also delivering a vibrant and sharp display for general use, but like the Dell, it's not optimized for the high refresh rates that gamers and 3D designers often prefer.
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.
Cost
$1,000
$1,512
$500
$1,000
$1,500
$2,000
$2,500
The Dell G15 5520 has a price of $1,000 and the Lenovo Legion Slim 7 16" costs $1,512.
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Key similarities
General Use
7.9
8.2
1920 x 1080
RESOLUTION
2560 x 1600
IPS
DISPLAY TECHNOLOGY
IPS
251.0 nits
DISPLAY BRIGHTNESS
502.0 nits
6.0 Hours
BATTERY LIFE
7.0 Hours
8.5/10
KEYBOARD QUALITY SCORE
8.5/10
6.3/10
PORTABILITY SCORE
7.5/10
Although they have very similar scores, PerfectRec considers Lenovo Legion Slim 7 16" to be very good for general use, while the Dell G15 5520 is good.
The Dell G15 5520 is suitable for general use with its competent processor and ample RAM, but it has a lower battery capacity and bulkier build than the Lenovo Legion Slim 7 16", impacting its portability and battery life. The Lenovo stands out in general use with higher screen resolution and better screen quality, as well as being lighter and offering longer battery life, making it very good for users who prioritize visual clarity and mobility.
Engineering and Design
8.2
8.6
9.1/10
OVERALL CPU SCORE
9.1/10
7.3/10
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
7.9
8.3
9.1/10
OVERALL CPU SCORE
9.1/10
1920 x 1080
RESOLUTION
2560 x 1600
16.0 GB
RAM
16.0 GB
IPS
DISPLAY TECHNOLOGY
IPS
Although they have very similar scores, PerfectRec considers Lenovo Legion Slim 7 16" to be very good for content creation, while the Dell G15 5520 is good.
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
8.0
9.1/10
OVERALL CPU SCORE
9.1/10
16.0 GB
RAM
16.0 GB
1920 x 1080
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
6.0 Hours
7.0 Hours
The Dell G15 5520 has 6 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.
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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 | |||
$1,000 | $1,512 | ||
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 | 5.55 lbs | 4.4 lbs | |
Width | |||
Width | 14.06" | 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 | 6 Hours | 7 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 99.9 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 15.6" | 16" | |
Display Technology | |||
Display Technology | IPS | IPS | |
Resolution | |||
Resolution | 1920 x 1080 | 2560 x 1600 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 240Hz | |
Display Brightness | |||
Display Brightness | 251 nits | 502 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 7.4/10 | 7.6/10 | |
Portability Score | |||
Portability Score | 6.4/10 | 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 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 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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