Notebookcheck

戴尔 Inspiron 15 5578-1777 变形本简短评测

Sascha Mölck (translated by Yuchen Wang), 01/27/2017
Convertible / 2-in-1 Kaby Lake Touchscreen Windows

Kaby Lake升级。 一颗强劲的处理器,一块IPS屏幕和高速固态硬盘:这些都是一台优秀办公电脑的必要配备,而这台Inspiron一样都没少。在此之上它还提供了背光键盘、优秀的电池续航,以及支持手写笔的触控屏幕。这一切只需要不足800欧元(约5886人民币)的预算。

Dell Inspiron 15 5578-1777 2-in-1 (Inspiron 15 5000 Series)
Processor
Intel Core i5-7200U
Graphics adapter
Intel HD Graphics 620, Core: 300-1000 MHz, 单通道, 21.20.4526
Memory
8192 MB 
, DDR4-2400, 单通道, 两个内存槽(一个已占用)
Display
15.6 inch 16:9, 1920x1080 pixel 141 PPI, 电容式, 10点触控, 支持主动式手写笔, 非压力感应, LG Philips (Dell 156WF7), IPS, glossy: yes
Mainboard
Intel Kaby Lake-U Premium PCH
Storage
SanDisk X400 256GB, SATA (SD8SB8U-256G), 256 GB 
, 200 GB free
Soundcard
Realtek ALC225 @ Intel Sunrise Point-LP PCH - High Definition Audio Controller
Connections
1 USB 2.0, 2 USB 3.0 / 3.1 Gen1, 1 HDMI, 1 Kensington Lock, Audio Connections: 整合音频接口, Card Reader: SD, Sensors: 加速感应器, TPM 2.0
Networking
Intel Dual Band Wireless-AC 3165 (a/b/g/n/ac), Bluetooth 4.2
Size
height x width x depth (in mm): 20.2 x 381.9 x 253.1
Battery
42 Wh Lithium-Ion, Battery runtime (according to manufacturer): 6 h
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 高清
Additional features
Speakers: 立体声, Keyboard: 孤岛式, Keyboard Light: yes, McAfee LiveSafe (试用版), MS Office 家庭和学生 2016 (试用版), 24 Months Warranty
Weight
2.82 kg, Power Supply: 288 g
Price
799 Euro

 

Networking
iperf3 Client (receive) TCP 1 m 4M x10
HP Pavilion x360 15-bk102ng
Intel Dual Band Wireless-AC 3168
352 MBit/s ∼100% +98%
Dell Inspiron 15 5578-1777 2-in-1
Intel Dual Band Wireless-AC 3165
178 MBit/s ∼51%
iperf3 Client (transmit) TCP 1 m 4M x10
HP Pavilion x360 15-bk102ng
Intel Dual Band Wireless-AC 3168
314 MBit/s ∼100% 0%
Dell Inspiron 15 5578-1777 2-in-1
Intel Dual Band Wireless-AC 3165
313 MBit/s ∼100%
iperf Server (receive) TCP 1 m
Dell Inspiron 15 5568
Intel Dual Band Wireless-AC 3165
372 MBit/s ∼100%
iperf Client (transmit) TCP 1 m
Dell Inspiron 15 5568
Intel Dual Band Wireless-AC 3165
390 MBit/s ∼100%
239
cd/m²
239
cd/m²
237
cd/m²
237
cd/m²
244
cd/m²
236
cd/m²
253
cd/m²
251
cd/m²
245
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 253 cd/m² Average: 242.3 cd/m² Minimum: 14.5 cd/m²
Brightness Distribution: 93 %
Center on Battery: 244 cd/m²
Contrast: 976:1 (Black: 0.25 cd/m²)
ΔE Color 4.94 | - Ø
ΔE Greyscale 4.93 | - Ø
63% sRGB (Argyll) 40% AdobeRGB 1998 (Argyll)
Gamma: 2.7
Dell Inspiron 15 5578-1777 2-in-1
IPS, 1920x1080, 15.6
Dell Inspiron 15 5568
IPS, 1920x1080, 15.6
HP Pavilion x360 15-bk102ng
IPS, 1920x1080, 15.6
Lenovo Yoga 510-15ISK
IPS, 1920x1080, 15.6
Response Times
7%
-15%
-17%
Response Time Grey 50% / Grey 80% *
55 (20, 35)
42 (19, 23)
24%
55 (23, 32)
-0%
43.2 (19.6, 23.6)
21%
Response Time Black / White *
20 (4, 16)
22 (6, 16)
-10%
26 (10, 16)
-30%
30.8 (17.6, 13.2)
-54%
PWM Frequency
50 (20)
Screen
3%
-23%
5%
Brightness
242
249
3%
191
-21%
230
-5%
Brightness Distribution
93
85
-9%
74
-20%
86
-8%
Black Level *
0.25
0.26
-4%
0.3
-20%
0.26
-4%
Contrast
976
1023
5%
683
-30%
977
0%
Colorchecker DeltaE2000 *
4.94
4.98
-1%
7.2
-46%
4.23
14%
Greyscale DeltaE2000 *
4.93
2.68
46%
6.86
-39%
2.87
42%
Gamma
2.7 89%
2.27 106%
2.27 106%
2.35 102%
CCT
7401 88%
6583 99%
6983 93%
5965 109%
Color Space (Percent of AdobeRGB 1998)
40
36
-10%
38
-5%
40.35
1%
Color Space (Percent of sRGB)
63
57
-10%
59
-6%
63.48
1%
Total Average (Program / Settings)
5% / 3%
-19% / -22%
-6% / 1%

* ... smaller is better

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM not detected

In comparison: 57 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 6576 (minimum: 43 - maximum: 142900) Hz was measured.

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
20 ms ... rise ↗ and fall ↘ combined↗ 4 ms rise
↘ 16 ms fall
The screen shows good response rates in our tests, but may be too slow for competitive gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 13 % of all devices are better.
This means that the measured response time is better than the average of all tested devices (26.7 ms).
       Response Time 50% Grey to 80% Grey
55 ms ... rise ↗ and fall ↘ combined↗ 20 ms rise
↘ 35 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 88 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (42.8 ms).
Cinebench R10 Rendering Single 32Bit
4976
Cinebench R10 Rendering Multiple CPUs 32Bit
11078
Cinebench R10 Shading 32Bit
7731
Cinebench R15 CPU Single 64Bit
126 Points
Cinebench R15 CPU Multi 64Bit
326 Points
Cinebench R15 OpenGL 64Bit
37.44 fps
Cinebench R15 Ref. Match 64Bit
97.7 %
Help
Cinebench R15
CPU Single 64Bit
Dell Inspiron 15 5568
Intel Core i7-6500U
128 Points ∼66% +2%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
126 Points ∼65% 0%
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
126 Points ∼65%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
114 Points ∼58% -10%
CPU Multi 64Bit
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
326 Points ∼15% 0%
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
326 Points ∼15%
Dell Inspiron 15 5568
Intel Core i7-6500U
308 Points ∼14% -6%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
289 Points ∼13% -11%
Cinebench R10
Rendering Single 32Bit
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
4976 Points ∼56%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
4787 Points ∼54% -4%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
4399 Points ∼50% -12%
Rendering Multiple CPUs 32Bit
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
11328 Points ∼23% +2%
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
11078 Points ∼22%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
9846 Points ∼20% -11%
Geekbench 3
32 Bit Multi-Core Score
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
6439 Points ∼21%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
6297 Points ∼20% -2%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
5733 Points ∼18% -11%
32 Bit Single-Core Score
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
2893 Points ∼62%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
2812 Points ∼60% -3%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
2699 Points ∼58% -7%
Geekbench 4.0
64 Bit Multi-Core Score
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
6795 Points ∼25%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
6425 Points ∼23% -5%
64 Bit Single-Core Score
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
3632 Points ∼65%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
3484 Points ∼62% -4%
JetStream 1.1 - 1.1 Total Score
Dell Inspiron 15 5578-1777 2-in-1
Intel Core i5-7200U
219.95 Points ∼66%
HP Pavilion x360 15-bk102ng
Intel Core i5-7200U
212.03 Points ∼64% -4%
Dell Inspiron 15 5568
Intel Core i7-6500U
207.09 Points ∼62% -6%
Lenovo Yoga 510-15ISK
Intel Core i5-6200U
196.87 Points ∼59% -10%
PCMark 8 Home Score Accelerated v2
3446 points
Help
PCMark 8 - Home Score Accelerated v2
Lenovo Yoga 510-15ISK
Radeon R7 M460, 6200U, Liteonit CV3-DE256
3651 Points ∼61% +6%
Dell Inspiron 15 5568
HD Graphics 520, 6500U, Toshiba THNSNK256GCS8
3607 Points ∼60% +5%
Dell Inspiron 15 5578-1777 2-in-1
HD Graphics 620, 7200U, SanDisk X400 256GB, SATA (SD8SB8U-256G)
3446 Points ∼58%
HP Pavilion x360 15-bk102ng
HD Graphics 620, 7200U, WDC Slim WD10SPCX-21KHST0
3173 Points ∼53% -8%
SanDisk X400 256GB, SATA (SD8SB8U-256G)
Sequential Read: 502.5 MB/s
Sequential Write: 465.3 MB/s
512K Read: 293 MB/s
512K Write: 322.7 MB/s
4K Read: 28.9 MB/s
4K Write: 54.98 MB/s
4K QD32 Read: 314.5 MB/s
4K QD32 Write: 209.2 MB/s
Dell Inspiron 15 5578-1777 2-in-1
SanDisk X400 256GB, SATA (SD8SB8U-256G)
Dell Inspiron 15 5568
Toshiba THNSNK256GCS8
HP Pavilion x360 15-bk102ng
WDC Slim WD10SPCX-21KHST0
Lenovo Yoga 510-15ISK
Liteonit CV3-DE256
CrystalDiskMark 3.0
-4%
-91%
6%
Write 4k QD32
209.2
197.6
-6%
1.098
-99%
232
11%
Read 4k QD32
314.5
275.3
-12%
0.844
-100%
281.5
-10%
Write 4k
54.98
86.67
58%
1.047
-98%
63.65
16%
Read 4k
28.9
19.88
-31%
0.357
-99%
27.05
-6%
Write 512
322.7
242
-25%
48.12
-85%
356.3
10%
Read 512
293
397.4
36%
31.37
-89%
384.5
31%
Write Seq
465.3
270
-42%
102
-78%
450.7
-3%
Read Seq
502.5
458.6
-9%
102.4
-80%
487
-3%
3DMark 11 Performance
1528 points
Help
3DMark 11 - 1280x720 Performance GPU
Lenovo Yoga 510-15ISK
AMD Radeon R7 M460, Intel Core i5-6200U
2137 Points ∼4% +50%
Dell Inspiron 15 5568
Intel HD Graphics 520, Intel Core i7-6500U
1506 Points ∼3% +6%
Dell Inspiron 15 5578-1777 2-in-1
Intel HD Graphics 620, Intel Core i5-7200U
1422 Points ∼3%
HP Pavilion x360 15-bk102ng
Intel HD Graphics 620, Intel Core i5-7200U
1355 Points ∼3% -5%
low med. high ultra
BioShock Infinite (2013) 40.324.319.96.3fps
Civilization VI (2016) 26.89.2fps

Noise Level

Idle
30.4 / 30.4 / 30.4 dB(A)
Load
32.3 / 35.2 dB(A)
 
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Audix TM1, Arta (15 cm distance)   environment noise: 30.6 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2037.540.237.837.940.137.52534.439.835.336.135.534.43132.839.53330.631.132.84031.537.630.931.829.831.55030.236.530.830.429.530.26331.636.733.930.733.331.68029.133.331.429.427.829.110029.139.330.828.52729.112525.32825.825.425.325.316025.830.825.925.324.325.820025.229.42624.524.625.225024.129.124.22322.424.131524.327.624.422.821.824.340023.126.822.621.620.323.150021.825.921.920.62021.863020.82521.319.618.920.880020.124.320.819.418.120.1100020.524.621.718.517.720.5125019.7242117.916.819.7160019.323.220.817.716.319.3200018.324.722.117.516.118.3250017.921.719.517.315.617.9315017.720.51917.215.517.7400017.319.317.817.115.417.3500017.218.917.317.21517.2630017.218.717.317.115.317.280001718.417.317.115.2171000016.918.117.11714.916.91250016.817.91716.914.916.816000171817.2171517SPL31.335.232.330.429.131.3N1.62.41.81.41.21.6median 19.7Dell Inspiron 15 5578-1777 2-in-1median 24.3median 21median 17.9median 16.8median 19.7Delta3.343.22.83.53.3hearing rangehide median Fan Noise
Max. Load
 34 °C37.3 °C28.6 °C 
 33.4 °C25.4 °C26.7 °C 
 24.5 °C24.6 °C25.5 °C 
Maximum: 37.3 °C
Average: 28.9 °C
24.8 °C43.3 °C42.6 °C
25.2 °C34.7 °C40.3 °C
25 °C25.8 °C24.9 °C
Maximum: 43.3 °C
Average: 31.8 °C
Power Supply (max.)  44.6 °C | Room Temperature 22.4 °C | FIRT 550-Pocket

Speakers

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs203940.1392539.135.539.13136.331.136.34037.829.837.8503829.5386339.933.339.98040.127.840.110040.42740.412542.825.342.816043.424.343.420047.224.647.225051.922.451.931557.921.857.94005720.35750053.92053.963060.218.960.280067.518.167.5100064.917.764.9125067.316.867.3160066.516.366.5200066.916.166.925006115.661315057.415.557.4400062.315.462.3500066.21566.263006515.365800052.715.252.71000048.414.948.41250050.714.950.71600057.31557.3SPL76.229.176.2N36.91.236.9median 57.4Dell Inspiron 15 5578-1777 2-in-1median 16.8median 57.4Delta7.93.57.935.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6Apple MacBook 12 (Early 2016) 1.1 GHzmedian 17.84.62.4hearing rangehide median Pink Noise
Dell Inspiron 15 5578-1777 2-in-1 audio analysis

(-) | not very loud speakers (67 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 10.3% lower than median
(±) | linearity of bass is average (7.3% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 6.6% higher than median
(±) | linearity of mids is average (7.3% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 5.5% higher than median
(±) | linearity of highs is average (12.7% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (17.1% difference to median)
Compared to same class
» 20% of all tested devices in this class were better, 9% similar, 71% worse
» The best had a delta of 11%, average was 23%, worst was 53%
Compared to all devices tested
» 25% of all tested devices were better, 7% similar, 68% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis

(+) | speakers can play relatively loud (83.6 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.3% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2% away from median
(+) | highs are linear (4.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (9.3% difference to median)
Compared to same class
» 2% of all tested devices in this class were better, 2% similar, 97% worse
» The best had a delta of 9%, average was 19%, worst was 41%
Compared to all devices tested
» 1% of all tested devices were better, 0% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Power Consumption
Off / Standbydarklight 0.25 / 0.35 Watt
Idledarkmidlight 4.3 / 7.6 / 9.8 Watt
Load midlight 32.6 / 28.4 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Battery Runtime
WiFi Surfing v1.3 (Edge 38)
6h 34min
Battery Runtime - WiFi Websurfing 1.3
Dell Inspiron 15 5578-1777 2-in-1
7200U, HD Graphics 620, 42 Wh
394 min ∼33%
HP Pavilion x360 15-bk102ng
7200U, HD Graphics 620, 48 Wh
348 min ∼29% -12%
Lenovo Yoga 510-15ISK
6200U, Radeon R7 M460, 35 Wh
335 min ∼28% -15%
Dell Inspiron 15 5568
6500U, HD Graphics 520, 42 Wh
299 min ∼25% -24%

Pros

+ IPS屏幕
+ 全高清屏幕
+ 运行安静
+ 高速固态硬盘
+ 优秀的电池续航
+ 背光键盘

Cons

- 屏幕较暗
- 不支持USB-C接口
In review: Dell Inspiron 15 5578-1777. Test device courtesy of Notebooksbilliger.de
In review: Dell Inspiron 15 5578-1777. Test device courtesy of Notebooksbilliger.de

Inspiron 15 5578是戴尔设计的一台15.6寸变形本。它只有内部硬件与前几台机型有所不同。生产商现在为它搭配了一颗Kaby Lake处理器,为它提供了在未来几年都不需要担心的足够性能。这台Inspiron的散热风扇或硬盘不再会给用户带来噪音。在待机时,这台设备能够完全保持安静;甚至是在高负载下它也不算吵闹。这台笔记本电脑也能够保持清凉。

一块高速固态硬盘保证了系统的迅捷响应。由于底盖可以打开,用户可以更换固态硬盘。这台设备的电池续航表现不俗。它的触控屏幕表现完美,可以对手指或主动式手写笔的操作作出实时的响应。为了测试手写笔的表现,我们用Hama生产的一根手写笔尝试了点击和全屏的拖拽操作,这台设备都没有让我们失望。它的背光键盘整体上也十分实用。

在所有重要的领域,这台Inspiron都从Kaby Lake更新中得到了好处。它的电池续航也得到了长足进步,系统更是得到了更高的运算性能。

它的IPS屏幕十分养眼,提供了宽广的可视角度范围,高对比度和不错的色彩还原准确度。它的亮度对于户外使用来说有点低,这让我们感到有些遗憾,用户将只能在室内使用这台设备了。它的另一个缺点是缺少USB-C接口。作为一台最新设备,我们期待它至少能提供一个最新接口。

另外一个值得一提的是,如果你要在戴尔官网购买这台设备的话,它的标准质保时间是一年。而在欧洲的一些其他购物网站(如notebooksbilliger.de)会提供消费者两年的质保。在这两种情况下,用户都可以选购戴尔的额外保修计划。

注:本文是基于完整评测的缩减版本,阅读完整的英文评测,请点击这里。 

Dell Inspiron 15 5578-1777 2-in-1 - 01/18/2017 v6
Sascha Mölck

Chassis
85 / 98 → 87%
Keyboard
85%
Pointing Device
84%
Connectivity
46 / 80 → 57%
Weight
58 / 78 → 53%
Battery
89%
Display
82%
Games Performance
54 / 68 → 80%
Application Performance
84 / 87 → 97%
Temperature
94%
Noise
93%
Audio
62 / 91 → 68%
Camera
47 / 85 → 56%
Average
74%
79%
Convertible - Weighted Average

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> Notebookcheck中文版(NBC中国) > 评测 > 戴尔 Inspiron 15 5578-1777 变形本简短评测
Sascha Mölck, 2017-01-27 (Update: 2017-01-28)