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Comparison Dell Inspiron 15 7577 [7577-5250] vs Lenovo Legion Y720 [Y720-15IKB 80VR008BRK]

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Dell Inspiron 15 7577 (7577-5250)
Lenovo Legion Y720 (Y720-15IKB 80VR008BRK)
Dell Inspiron 15 7577 [7577-5250]Lenovo Legion Y720 [Y720-15IKB 80VR008BRK]
Outdated ProductOutdated Product
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Typelaptoplaptop
Screen
Screen size15.6 "15.6 "
Screen typeIPSIPS
Surface treatmentanti-glareanti-glare
Screen resolution1920x1080 (16:9)1920x1080 (16:9)
Refresh rate60 Hz60 Hz
Brightness220 nt250 nt
Contrast840 :1800 :1
CPU
SeriesCore i7Core i7
Model7700HQ7700HQ
Processor cores44
Total threads8
CPU speed2.8 GHz2.8 GHz
TurboBoost / TurboCore frequency3.8 GHz3.8 GHz
3DMark067686 score(s)7726 score(s)
Passmark CPU Mark8909 score(s)8976 score(s)
SuperPI 1M10 с10.07 с
RAM
RAM16 GB8 GB
Max. RAM32 GB32 GB
RAM typeDDR4DDR4
RAM speed2400 MHz2400 MHz
Slots22
Graphics card
Graphics card typededicateddedicated
Graphics card seriesNVIDIA GeForceNVIDIA GeForce
Graphics card modelGTX 1060 Max-QGTX 1060
Video memory6 GB6 GB
Memory typeGDDR5GDDR5
VR
3DMark0625367 points
3DMark Vantage P34127 points
Storage
Drive typeHDD+SSDHDD
Drive capacity
1000 GB /HDD/
1000 GB
2nd drive capacity
256 GB /SSD M.2/
Additional M.2 connector1
Connections
Connection ports
HDMI
 
 
HDMI
v 2.0
DisplayPort
Card reader
 /SD/MMC/
USB 3.2 gen133
USB C 3.2 gen21 pc1 pc
Thunderbolt interfacex1 v3x1 v3
Alternate Mode
LAN (RJ-45)1 Gbps1 Gbps
Multimedia
Webcam1280x720 (HD)1280x720 (HD)
Camera shutter
Speakers
/Waves MaxxAudio Pro/
2.1
Brand acousticsJBL
Security
fingerprint scanner /combined with power button/
kensington / Noble lock
 
kensington / Noble lock
Keyboard
Backlightredis absent
Key designisland typeisland type
Num block
Waterproof
Input devicetouchpadtouchpad
Battery
Battery capacity3910 mAh
Battery capacity56 W*h60 W*h
Battery voltage15.2 V15.4 V
Operating time5 h
Powered by USB-C (Power Delivery)
Fast charge
General
Preinstalled OSWindows 10 HomeWindows 10 Home
Materialaluminium / plasticaluminium / plastic
Dimensions (WxDxT)389x274.7x24.95 mm380 x 277 x 29 mm
Weight2.66 kg3.2 kg
Color
Added to E-Catalogdecember 2017may 2017

Brightness

The maximum brightness that a laptop screen can provide.

The brighter the ambient light, the brighter the laptop screen should be, otherwise the image on it may be difficult to read. And vice versa: in dim ambient light, high brightness is unnecessary — it greatly burdens the eyes (however, in this case, modern laptops provide brightness control). Thus, the higher this indicator, the more versatile the screen is, the wider the range of conditions in which it can be effectively used. The downside of these benefits is an increase in price and energy consumption.

As for specific values, many modern laptops have a brightness of 250 – 300 nt and even lower. This is quite enough for working under artificial lighting of medium intensity, but in bright natural light, visibility may already be a problem. For use in sunny weather (especially outdoors), it is desirable to have a brightness margin of at least 300 – 350 nt. And in the most advanced models, this parameter can be 350 – 400 nt and even more.

Contrast

The contrast of the screen installed in the laptop.

Contrast is the largest difference in brightness between the lightest white and darkest black that can be achieved on a single screen. It is written as a fraction, for example, 560:1; while the larger the first number, the higher the contrast, the more advanced the screen is and the better the image quality can be achieved on it. This is especially noticeable with large differences in brightness within a single frame: with low contrast, individual details located in the darkest or brightest parts of the picture may be lost, increasing the contrast allows you to eliminate this phenomenon to a certain extent. The flip side of these benefits is an increase in cost.

Separately, we emphasize that in this case only static contrast is indicated — the difference provided within one frame in normal operation, at constant brightness and without the use of special technologies. For advertising purposes, some manufacturers may also provide data on the so-called dynamic contrast — it can be measured in very impressive numbers (seven-digit or more). However, you should focus primarily on static contrast — this is the basic characteristic of any display.

As for specific values, even in the most advanced screens, this indicator does not exceed 2000: 1. But in general, modern laptops have a rather low contrast ratio — it is assumed that for tasks that require more advanced image characteristics, it is more...reasonable to use an external screen (monitor or TV).

Total threads

The number of threads supported by the laptop processor.

A thread is a sequence of instructions executed by a processor. Initially, each processor core was designed for one such sequence, and the number of threads was equal to the number of cores. However, in modern CPUs, multithreading technologies are increasingly being used, which allow loading each core with two instruction sequences at once. Such technologies have different names for different manufacturers, but the principle of their operation is the same: during the inevitable pauses in the execution of one of the threads, the kernel does not idle, but works with a different sequence. Accordingly, the total number of threads in such processors is twice the number of cores; such a scheme of work significantly increases productivity (although, of course, it also affects the cost).

3DMark06

The result shown by the laptop processor in 3DMark06.

This test is primarily focused on testing performance in games — in particular, the ability of the processor to process advanced graphics and artificial intelligence elements. Test scores are reported as scores; the higher this number, the higher the performance of the tested chip. Good 3DMark06 results are especially important for gaming laptops.

Passmark CPU Mark

The result shown by the laptop processor in the Passmark CPU Mark test.

Passmark CPU Mark is a comprehensive test that is more detailed and reliable than the popular 3DMark06 (see above). It checks not only the gaming capabilities of the CPU, but also its performance in other modes, based on which it displays the overall score; this score can be used to fairly reliably evaluate the processor as a whole (the more points, the higher the performance).

SuperPI 1M

The result shown by the laptop processor in the SuperPI 1M test.

The essence of this test is to calculate the number "pi" to the millionth decimal place. The time spent on this calculation is the final result. Accordingly, the more powerful the processor, the smaller the result will be (this SuperPI 1M is fundamentally different from many other tests).

RAM

The amount of random access memory (RAM or RAM) actually installed in the laptop.

The amount of RAM is one of the most important indicators characterizing the overall flow Rate of the system. The more RAM installed in a laptop, the better it will cope with “heavy” resource-intensive programs, and the more tasks can be performed on it simultaneously without “brakes” and failures.

Today , 4 GB of RAM is considered the minimum required. A capacity of 8 GB is usually enough for comfortable household use and simple games, 16 GB and 32 GB are enough for running resource-intensive applications and confidently launching modern games. And in advanced gaming and professional laptops there are also larger amounts of RAM - 64 GB or even more.

Note that many laptop models allow you to increase the available amount of RAM; For more details, see “Maximum installed volume”.

Graphics card model

GeForce graphics cards from NVIDIA: RTX represented by RTX 2060, RTX 2060 Max-Q, RTX 2070, RTX 2070 Max-Q, RTX 2070 Super, RTX 2070 Super Max-Q, RTX 2080, RTX 2080 Max-Q, RTX 2080 Super, RTX 2080 Super Max-Q, RTX 3050, RTX 3050 Ti, RTX 3060, RTX 3060 Max-Q, RTX 3070, RTX 3070 Max-Q, RTX 3070 Ti, RTX 3080, RTX 3080 Ti, RTX 4050, RTX 4060, R TX 4070, RTX 4080, RTX 4090 ; MX1xx represented by MX110, MX130 and MX150, MX2xx(MX230 and MX250), MX3xx(MX330 and MX350), MX450, GTX which represent GTX 1050, GTX 1060, GTX 1060 Max-Q, GTX 1070, GTX 1070 Max-Q, GTX 1080, GTX 1080 Max-Q, GTX 1650, GTX 1650 Max-Q, GTX 1650 Ti, GTX 1660 Ti, GTX 1660 Ti Max-Q and. AMD also offers video cards Radeon 520, Radeon 530(535), Radeon 540X, Radeon 610(625, 630), Radeon RX 550 (550X, 560), Radeon RX 640, Radeon RX 5500M, Radeon RX 6800M and Radeon Pro.

Note that all the above models are discrete. Actually, for a configuration with discrete graphics, it is the model of a separate video adapter that is indicated; if it is supplemented by an integrated module, the name of this module can be clarified by the official characteristics of the processor.

It is also worth mentioning that this paragraph does not give the full name of the model, but only its name within the series (the series itself is given separately - see above). However, knowing the series and model, one can easily find detailed information about the graphics card.

3DMark06

The result shown by the laptop's graphics card in 3DMark06.

This test primarily determines how well a graphics card handles intensive workloads, in particular, with detailed 3D graphics. The test result is indicated in points; the more points, the higher the performance of the video adapter. Good 3DMark06 scores are especially important for gaming laptops and advanced workstations. However, it is difficult to call them reliable, since measurements are made on video cards with different TDPs and an overall average score is given. Thus, your laptop can have either more or less than the specified result - it all depends on the TDP of the installed video card.
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