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惠普 EliteBook 840 G4 (7200U, 全高清) 笔记本电脑简短评测

老瓶新酒。 惠普现在为它的商务笔记本电脑搭配了Kaby Lake处理器,不过在其他方面它几乎一成不变。尽管它的屏幕亮度有所提高,但是其他表现都让我们十分失望。
Business Kaby Lake Laptop / Notebook Windows
EliteBook 840 G4 Z2V49ET#ABD (EliteBook 840 Series)
Processor
Intel Core i5-7200U 2 x 2.5 - 3.1 GHz, Kaby Lake
Graphics adapter
Memory
8 GB 
, DDR4-2133, 1/2插槽已占用, 最高支持 32 GB
Display
14.00 inch 16:9, 1920 x 1080 pixel 157 PPI, AUO123D, TN, glossy: no
Mainboard
Intel Kaby Lake-U Premium PCH
Storage
Samsung PM961 MZVLW256HEHP, 256 GB 
Soundcard
Intel Kaby Lake-U/Y PCH - High Definition Audio
Connections
2 USB 3.0 / 3.1 Gen1, 1 USB 3.1 Gen2, 1 VGA, 1 HDMI, 1 DisplayPort, 1 Kensington Lock, 1 Docking Station Port, Audio Connections: 3.5毫米音频接口, Card Reader: SD (SD, SDHC, SDXC), 1 SmartCard, 1 Fingerprint Reader
Networking
Intel Ethernet Connection I219-V (10/100/1000MBit/s), Intel Dual Band Wireless-AC 8265 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5/), Bluetooth 4.2, LTE, LTE
Size
height x width x depth (in mm): 18.9 x 338 x 237
Battery
51 Wh Lithium-Ion, Battery runtime (according to manufacturer): 15 h
Operating System
Microsoft Windows 10 Pro 64 Bit
Camera
Webcam: 720p 高清
Additional features
Speakers: 立体声, Keyboard: 孤岛式, Keyboard Light: yes, 45瓦电源适配器,快速开始说明,质保信息, HP 工具软件, Microsoft Office 365 (试用版), 36 Months Warranty
Weight
1.48 kg, Power Supply: 283 g
Price
1539 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Size Comparison

338 mm 237 mm 18.9 mm 1.5 kg336.6 mm 232.5 mm 19.95 mm 1.7 kg337 mm 234.5 mm 15.8 mm 1.4 kg332.6 mm 234 mm 19 mm 1.4 kg331 mm 226.8 mm 18.8 mm 1.4 kg297 mm 210 mm 1 mm 5.7 g
Left side: Kensington lock, VGA, USB 3.0, SmartCard reader
Left side: Kensington lock, VGA, USB 3.0, SmartCard reader
Right side: USB-C Gen.1, DisplayPort 1.2, SD-card reader (not visible), 3.5 mm audio, USB 3.0, RJ45, docking port, Micro-SIM, power
Right side: USB-C Gen.1, DisplayPort 1.2, SD-card reader (not visible), 3.5 mm audio, USB 3.0, RJ45, docking port, Micro-SIM, power
SD Card Reader
average JPG Copy Test (av. of 3 runs)
Lenovo ThinkPad T470s-20HGS00V00
 
79.3 MB/s +6%
Lenovo ThinkPad T470-20HD002HGE
 
76.6 MB/s +2%
HP EliteBook 840 G4-Z2V49ET ABD
 
74.9 MB/s
Fujitsu LifeBook U747
 
72.6 MB/s -3%
HP EliteBook 840 G3 T9X59ET#ABD
 
61 MB/s -19%
maximum AS SSD Seq Read Test (1GB)
Lenovo ThinkPad T470s-20HGS00V00
 
90.5 MB/s +8%
Lenovo ThinkPad T470-20HD002HGE
 
88.7 MB/s +6%
HP EliteBook 840 G4-Z2V49ET ABD
 
83.7 MB/s
HP EliteBook 840 G3 T9X59ET#ABD
 
83.6 MB/s 0%
Fujitsu LifeBook U747
 
83.3 MB/s 0%
Networking
iperf3 transmit AX12
Lenovo ThinkPad T470-20HD002HGE
Intel Dual Band Wireless-AC 8265
512 MBit/s +1%
HP EliteBook 840 G4-Z2V49ET ABD
Intel Dual Band Wireless-AC 8265 (jseb)
509 MBit/s
Fujitsu LifeBook U747
Intel Dual Band Wireless-AC 8265
509 MBit/s 0%
Lenovo ThinkPad T470s-20HGS00V00
Intel Dual Band Wireless-AC 8265
297 MBit/s -42%
iperf3 receive AX12
Lenovo ThinkPad T470-20HD002HGE
Intel Dual Band Wireless-AC 8265
657 MBit/s +13%
Fujitsu LifeBook U747
Intel Dual Band Wireless-AC 8265
655 MBit/s +13%
Lenovo ThinkPad T470s-20HGS00V00
Intel Dual Band Wireless-AC 8265
639 MBit/s +10%
HP EliteBook 840 G4-Z2V49ET ABD
Intel Dual Band Wireless-AC 8265 (jseb)
579 MBit/s
315
cd/m²
323
cd/m²
311
cd/m²
296
cd/m²
346
cd/m²
304
cd/m²
304
cd/m²
345
cd/m²
311
cd/m²
Distribution of brightness
AUO123D tested with X-Rite i1Pro 2
Maximum: 346 cd/m² (Nits) Average: 317.2 cd/m² Minimum: 22.4 cd/m²
Brightness Distribution: 86 %
Center on Battery: 346 cd/m²
Contrast: 402:1 (Black: 0.86 cd/m²)
ΔE Color 8.64 | 0.5-29.43 Ø5
ΔE Greyscale 11.24 | 0.57-98 Ø5.3
80% sRGB (Argyll 1.6.3 3D)
52% AdobeRGB 1998 (Argyll 1.6.3 3D)
57.7% AdobeRGB 1998 (Argyll 2.2.0 3D)
80.7% sRGB (Argyll 2.2.0 3D)
55.8% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.62
HP EliteBook 840 G4-Z2V49ET ABD
AUO123D, , 1920x1080, 14.00
Lenovo ThinkPad T470-20HD002HGE
N140HCA-EAB, , 1920x1080, 14.00
Lenovo ThinkPad T470s-20HGS00V00
B140QAN01.5, , 2560x1440, 14.00
Fujitsu LifeBook U747
LG LP140WF3, , 1920x1080, 14.00
HP EliteBook Folio 1040 G3
AUO1136, , 2560x1440, 14.00
HP EliteBook 840 G3 T9X59ET#ABD
Chi Mei CMN14C0, , 1920x1080, 14.00
Display
-24%
21%
10%
21%
-11%
Display P3 Coverage
55.8
41.6
-25%
69
24%
66.1
18%
67.9
22%
48.93
-12%
sRGB Coverage
80.7
61.9
-23%
95.1
18%
84.8
5%
96.8
20%
73.7
-9%
AdobeRGB 1998 Coverage
57.7
43.06
-25%
69.6
21%
62
7%
70
21%
50.5
-12%
Response Times
-28%
-22%
4%
-17%
-10%
Response Time Grey 50% / Grey 80% *
39 ?(20, 19, Plateau)
41.6 ?(20.4, 21.2)
-7%
46.4 ?(20.4, 26)
-19%
36 ?(16.4, 19.6)
8%
46.4 ?(16.4, 30)
-19%
43 ?(20, 23)
-10%
Response Time Black / White *
23 ?(6, 17, Plateau)
34 ?(9.6, 24.4)
-48%
28.8 ?(16.4, 12.4)
-25%
23.2 ?(12.4, 10.8)
-1%
26.4 ?(6.8, 19.6)
-15%
25 ?(9, 16)
-9%
PWM Frequency
204 ?(90)
Screen
23%
39%
33%
38%
4%
Brightness middle
346
306
-12%
327
-5%
291
-16%
327
-5%
366
6%
Brightness
317
287
-9%
311
-2%
296
-7%
316
0%
336
6%
Brightness Distribution
86
88
2%
88
2%
84
-2%
87
1%
87
1%
Black Level *
0.86
0.3
65%
0.25
71%
0.32
63%
0.35
59%
0.65
24%
Contrast
402
1020
154%
1308
225%
909
126%
934
132%
563
40%
Colorchecker dE 2000 *
8.64
6.2
28%
6.1
29%
4.3
50%
4.39
49%
10.26
-19%
Colorchecker dE 2000 max. *
13.58
13.6
-0%
12.2
10%
7.5
45%
7.27
46%
Greyscale dE 2000 *
11.24
5.8
48%
8.8
22%
4.3
62%
4.69
58%
11.51
-2%
Gamma
2.62 84%
2.04 108%
2.18 101%
2.31 95%
2.15 102%
2.4 92%
CCT
12530 52%
6277 104%
6172 105%
6529 100%
7101 92%
12725 51%
Color Space (Percent of AdobeRGB 1998)
52
39.62
-24%
61.56
18%
55.46
7%
62.52
20%
47
-10%
Color Space (Percent of sRGB)
80
61.44
-23%
94.88
19%
84.77
6%
96.71
21%
74
-7%
Total Average (Program / Settings)
-10% / 7%
13% / 27%
16% / 25%
14% / 27%
-6% / -1%

* ... smaller is better

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
23 ms ... rise ↗ and fall ↘ combined↗ 6 ms rise
↘ 17 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 0.1 (minimum) to 240 (maximum) ms. » 45 % of all devices are better.
This means that the measured response time is similar to the average of all tested devices (21.6 ms).
       Response Time 50% Grey to 80% Grey
39 ms ... rise ↗ and fall ↘ combined↗ 20 ms rise
↘ 19 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.2 (minimum) to 636 (maximum) ms. » 53 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (33.9 ms).

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: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 18110 (minimum: 5 - maximum: 3846000) Hz was measured.

0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330Tooltip
Cinebench R15 CPU Multi 64 Bit
Cinebench R15
CPU Single 64Bit
Lenovo ThinkPad T470s-20HGS00V00
Intel Core i7-7600U
162 Points +36%
Fujitsu LifeBook U747
Intel Core i5-7200U
130 Points +9%
Lenovo ThinkPad T470-20HD002HGE
Intel Core i5-7200U
126 Points +6%
HP EliteBook Folio 1040 G3
Intel Core i5-6300U
124 Points +4%
HP EliteBook 840 G3 T9X59ET#ABD
Intel Core i7-6500U
119 Points 0%
HP EliteBook 840 G4-Z2V49ET ABD
Intel Core i5-7200U
119 Points
CPU Multi 64Bit
Lenovo ThinkPad T470s-20HGS00V00
Intel Core i7-7600U
368 Points +12%
Fujitsu LifeBook U747
Intel Core i5-7200U
331 Points +1%
HP EliteBook 840 G4-Z2V49ET ABD
Intel Core i5-7200U
329 Points
Lenovo ThinkPad T470-20HD002HGE
Intel Core i5-7200U
326 Points -1%
HP EliteBook 840 G3 T9X59ET#ABD
Intel Core i7-6500U
322 Points -2%
HP EliteBook Folio 1040 G3
Intel Core i5-6300U
303 Points -8%
Cinebench R15 CPU Single 64Bit
119 Points
Cinebench R15 CPU Multi 64Bit
329 Points
Cinebench R15 OpenGL 64Bit
38.88 fps
Cinebench R15 Ref. Match 64Bit
97.7 %
Help
PCMark 8
Home Score Accelerated v2
Lenovo ThinkPad T470s-20HGS00V00
HD Graphics 620, i7-7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
3968 Points +14%
Lenovo ThinkPad T470-20HD002HGE
HD Graphics 620, i5-7200U, Samsung PM961 NVMe MZVLW512HMJP
3507 Points +1%
Fujitsu LifeBook U747
HD Graphics 620, i5-7200U, Samsung MZYTY256HDHP
3506 Points +1%
HP EliteBook 840 G4-Z2V49ET ABD
HD Graphics 620, i5-7200U, Samsung PM961 MZVLW256HEHP
3486 Points
HP EliteBook Folio 1040 G3
HD Graphics 520, 6300U, Samsung SM951 MZVPV256HDGL m.2 PCI-e
3305 Points -5%
HP EliteBook 840 G3 T9X59ET#ABD
HD Graphics 520, 6500U, Samsung SSD PM851 256 GB MZNTE256HMHP
3231 Points -7%
Work Score Accelerated v2
Lenovo ThinkPad T470s-20HGS00V00
HD Graphics 620, i7-7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
4856 Points +6%
Lenovo ThinkPad T470-20HD002HGE
HD Graphics 620, i5-7200U, Samsung PM961 NVMe MZVLW512HMJP
4667 Points +2%
Fujitsu LifeBook U747
HD Graphics 620, i5-7200U, Samsung MZYTY256HDHP
4653 Points +2%
HP EliteBook 840 G4-Z2V49ET ABD
HD Graphics 620, i5-7200U, Samsung PM961 MZVLW256HEHP
4572 Points
HP EliteBook 840 G3 T9X59ET#ABD
HD Graphics 520, 6500U, Samsung SSD PM851 256 GB MZNTE256HMHP
4275 Points -6%
HP EliteBook Folio 1040 G3
HD Graphics 520, 6300U, Samsung SM951 MZVPV256HDGL m.2 PCI-e
4241 Points -7%
PCMark 8 Home Score Accelerated v2
3486 points
PCMark 8 Creative Score Accelerated v2
4352 points
PCMark 8 Work Score Accelerated v2
4572 points
Help
HP EliteBook 840 G4-Z2V49ET ABD
Samsung PM961 MZVLW256HEHP
Lenovo ThinkPad T470-20HD002HGE
Samsung PM961 NVMe MZVLW512HMJP
Lenovo ThinkPad T470s-20HGS00V00
Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
Fujitsu LifeBook U747
Samsung MZYTY256HDHP
HP EliteBook Folio 1040 G3
Samsung SM951 MZVPV256HDGL m.2 PCI-e
HP EliteBook 840 G3 T9X59ET#ABD
Samsung SSD PM851 256 GB MZNTE256HMHP
CrystalDiskMark 3.0
-10%
12%
-50%
9%
-56%
Read Seq
1819
1155
-37%
1760
-3%
504
-72%
1649
-9%
497.8
-73%
Write Seq
1263
1076
-15%
1666
32%
497.8
-61%
1265
0%
241.4
-81%
Read 512
922
811
-12%
832
-10%
396.7
-57%
1252
36%
396
-57%
Write 512
804
862
7%
1064
32%
283.4
-65%
1244
55%
241.8
-70%
Read 4k
61.4
55.5
-10%
53.2
-13%
35.73
-42%
53.3
-13%
27.02
-56%
Write 4k
157.1
134.6
-14%
167.4
7%
87.8
-44%
159.9
2%
82.6
-47%
Read 4k QD32
513
496.2
-3%
630
23%
399.1
-22%
559
9%
388.5
-24%
Write 4k QD32
410.2
425.4
4%
533
30%
249.7
-39%
376.7
-8%
242.8
-41%
Samsung PM961 MZVLW256HEHP
Sequential Read: 1819 MB/s
Sequential Write: 1263 MB/s
512K Read: 922 MB/s
512K Write: 804 MB/s
4K Read: 61.4 MB/s
4K Write: 157.1 MB/s
4K QD32 Read: 513 MB/s
4K QD32 Write: 410.2 MB/s
3DMark 11 - 1280x720 Performance GPU
Lenovo ThinkPad T470s-20HGS00V00
Intel HD Graphics 620, Intel Core i7-7600U
1777 Points +26%
Lenovo ThinkPad T470-20HD002HGE
Intel HD Graphics 620, Intel Core i5-7200U
1432 Points +1%
HP EliteBook 840 G4-Z2V49ET ABD
Intel HD Graphics 620, Intel Core i5-7200U
1413 Points
Fujitsu LifeBook U747
Intel HD Graphics 620, Intel Core i5-7200U
1409 Points 0%
HP EliteBook Folio 1040 G3
Intel HD Graphics 520, Intel Core i5-6300U
1377 Points -3%
HP EliteBook 840 G3 T9X59ET#ABD
Intel HD Graphics 520, Intel Core i7-6500U
1327 Points -6%
3DMark
1280x720 Cloud Gate Standard Graphics
Lenovo ThinkPad T470s-20HGS00V00
Intel HD Graphics 620, Intel Core i7-7600U
9610 Points +40%
HP EliteBook 840 G4-Z2V49ET ABD
Intel HD Graphics 620, Intel Core i5-7200U
6864 Points
Lenovo ThinkPad T470-20HD002HGE
Intel HD Graphics 620, Intel Core i5-7200U
6824 Points -1%
Fujitsu LifeBook U747
Intel HD Graphics 620, Intel Core i5-7200U
6803 Points -1%
HP EliteBook Folio 1040 G3
Intel HD Graphics 520, Intel Core i5-6300U
6708 Points -2%
HP EliteBook 840 G3 T9X59ET#ABD
Intel HD Graphics 520, Intel Core i7-6500U
6351 Points -7%
1920x1080 Fire Strike Graphics
Lenovo ThinkPad T470s-20HGS00V00
Intel HD Graphics 620, Intel Core i7-7600U
1176 Points +59%
HP EliteBook Folio 1040 G3
Intel HD Graphics 520, Intel Core i5-6300U
900 Points +22%
Lenovo ThinkPad T470-20HD002HGE
Intel HD Graphics 620, Intel Core i5-7200U
818 Points +11%
HP EliteBook 840 G3 T9X59ET#ABD
Intel HD Graphics 520, Intel Core i7-6500U
800 Points +8%
Fujitsu LifeBook U747
Intel HD Graphics 620, Intel Core i5-7200U
799 Points +8%
HP EliteBook 840 G4-Z2V49ET ABD
Intel HD Graphics 620, Intel Core i5-7200U
738 Points
3DMark 11 Performance
1525 points
3DMark Ice Storm Standard Score
50497 points
3DMark Cloud Gate Standard Score
5621 points
3DMark Fire Strike Score
697 points
Help
low med. high ultra
BioShock Infinite (2013) 40.5 24.3 19.8 6.4
Battlefield 4 (2013) 30.7 24.5 15.7
The Witcher 3 (2015) 12.9

Noise Level

Idle
31 / 31 / 31 dB(A)
Load
33.5 / 33.7 dB(A)
  red to green bar
 
 
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: 31 dB(A)
HP EliteBook 840 G4-Z2V49ET ABD
i5-7200U, HD Graphics 620
Lenovo ThinkPad T470-20HD002HGE
i5-7200U, HD Graphics 620
Lenovo ThinkPad T470s-20HGS00V00
i7-7600U, HD Graphics 620
Fujitsu LifeBook U747
i5-7200U, HD Graphics 620
HP EliteBook Folio 1040 G3
6300U, HD Graphics 520
HP EliteBook 840 G3 T9X59ET#ABD
6500U, HD Graphics 520
Noise
6%
-2%
8%
3%
-6%
off / environment *
31
28
10%
28.9
7%
28.2
9%
29.1
6%
31.2
-1%
Idle Minimum *
31
28
10%
28.9
7%
28.2
9%
29.1
6%
31.2
-1%
Idle Average *
31
28
10%
28.9
7%
28.2
9%
29.1
6%
32.1
-4%
Idle Maximum *
31
29.4
5%
30.1
3%
28.2
9%
29.1
6%
33.1
-7%
Load Average *
33.5
31.4
6%
39.2
-17%
31.2
7%
32.6
3%
36.2
-8%
Load Maximum *
33.7
34.6
-3%
39.2
-16%
33
2%
37.8
-12%
37.8
-12%

* ... smaller is better

Max. Load
 34 °C37 °C33 °C 
 33.2 °C36.3 °C33.5 °C 
 26.5 °C26.2 °C27.4 °C 
Maximum: 37 °C
Average: 31.9 °C
39.4 °C35.6 °C35.4 °C
33 °C35.2 °C33.2 °C
29.1 °C28.2 °C27.3 °C
Maximum: 39.4 °C
Average: 32.9 °C
Power Supply (max.)  34.7 °C | Room Temperature 22.1 °C | FIRT 550-Pocket
(+) The average temperature for the upper side under maximal load is 31.9 °C / 89 F, compared to the average of 29.5 °C / 85 F for the devices in the class Office.
(+) The maximum temperature on the upper side is 37 °C / 99 F, compared to the average of 34.2 °C / 94 F, ranging from 21.2 to 62.5 °C for the class Office.
(+) The bottom heats up to a maximum of 39.4 °C / 103 F, compared to the average of 36.7 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 25 °C / 77 F, compared to the device average of 29.5 °C / 85 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 27.4 °C / 81.3 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 27.7 °C / 81.9 F (+0.3 °C / 0.6 F).
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2039.23739.22537.43437.43135.330.735.34038.436.938.45038.331.138.36339.630.839.68039.83039.81003928.53912540.425.340.416042.925.542.920046.925.946.925048.523.748.531557.923.957.940060.622.160.65006121.46163060.820.560.880058.22058.2100060.919.360.9125060.318.760.3160059.718.259.7200061.51861.5250065.317.965.3315062.317.862.3400064.817.864.8500066.617.966.6630066.317.866.3800063.617.963.61000062.117.762.11250059.617.559.61600051.217.651.2SPL75.231.175.2N36.21.636.2median 60.6median 18.7median 60.6Delta5.92.25.93336.432.635.528.436.629.234.626.23225.934.926.138.325.936.924.339.922.741.62245.324.550.52159.519.262.21862.218.668.618.573.420.369.216.56814.66614.962.814.466.514.771.315.160.214.867.11569.915.357.215.257.614.960.914.953.828.879.71.247.3median 16.5median 62.23.18hearing rangehide median Pink NoiseHP EliteBook 840 G4-Z2V49ET ABDLenovo ThinkPad T470-20HD002HGE
HP EliteBook 840 G4-Z2V49ET ABD audio analysis

(-) | not very loud speakers (66 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 14.6% lower than median
(±) | linearity of bass is average (7.8% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 0.7% away from median
(+) | mids are linear (3.4% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 3.9% away from median
(+) | highs are linear (5.4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (16.2% difference to median)
Compared to same class
» 14% of all tested devices in this class were better, 5% similar, 81% worse
» The best had a delta of 7%, average was 22%, worst was 53%
Compared to all devices tested
» 21% of all tested devices were better, 5% similar, 74% worse
» The best had a delta of 4%, average was 25%, worst was 134%

Lenovo ThinkPad T470-20HD002HGE audio analysis

(±) | speaker loudness is average but good (80.4 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 16.6% lower than median
(±) | linearity of bass is average (8.8% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4.3% away from median
(+) | mids are linear (6.7% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 5.4% higher than median
(±) | linearity of highs is average (13.3% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (18.7% difference to median)
Compared to same class
» 29% of all tested devices in this class were better, 6% similar, 66% worse
» The best had a delta of 7%, average was 22%, worst was 53%
Compared to all devices tested
» 37% of all tested devices were better, 8% similar, 55% worse
» The best had a delta of 4%, average was 25%, worst was 134%

Power Consumption
Off / Standbydarklight 0.52 / 0.72 Watt
Idledarkmidlight 2.9 / 5.6 / 8.15 Watt
Load midlight 30.6 / 31 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Currently we use the Metrahit Energy, a professional single phase power quality and energy measurement digital multimeter, for our measurements. Find out more about it here. All of our test methods can be found here.
HP EliteBook 840 G4-Z2V49ET ABD
i5-7200U, HD Graphics 620, 1920x1080, 14.00
Lenovo ThinkPad T470-20HD002HGE
i5-7200U, HD Graphics 620, 1920x1080, 14.00
Lenovo ThinkPad T470s-20HGS00V00
i7-7600U, HD Graphics 620, 2560x1440, 14.00
Fujitsu LifeBook U747
i5-7200U, HD Graphics 620, 1920x1080, 14.00
HP EliteBook Folio 1040 G3
6300U, HD Graphics 520, 2560x1440, 14.00
HP EliteBook 840 G3 T9X59ET#ABD
6500U, HD Graphics 520, 1920x1080, 14.00
Power Consumption
-2%
-44%
-19%
-56%
-6%
Idle Minimum *
2.9
3.21
-11%
4.64
-60%
4.11
-42%
6.3
-117%
3.8
-31%
Idle Average *
5.6
6.15
-10%
8.93
-59%
7.87
-41%
9.4
-68%
6.3
-13%
Idle Maximum *
8.15
6.82
16%
9.12
-12%
8.74
-7%
10.1
-24%
6.8
17%
Load Average *
30.6
28.5
7%
42.2
-38%
30.2
1%
33.3
-9%
34.4
-12%
Load Maximum *
31
34.5
-11%
47.3
-53%
32.4
-5%
49.5
-60%
28.3
9%

* ... smaller is better

Battery Runtime
Idle (without WLAN, min brightness)
19h 15min
WiFi Websurfing
9h 31min
Big Buck Bunny H.264 1080p
9h 51min
Load (maximum brightness)
3h 04min
HP EliteBook 840 G4-Z2V49ET ABD
i5-7200U, HD Graphics 620, 51 Wh
Lenovo ThinkPad T470-20HD002HGE
i5-7200U, HD Graphics 620, 48 Wh
Lenovo ThinkPad T470s-20HGS00V00
i7-7600U, HD Graphics 620, 51 Wh
Fujitsu LifeBook U747
i5-7200U, HD Graphics 620, 50 Wh
HP EliteBook Folio 1040 G3
6300U, HD Graphics 520, 45.6 Wh
HP EliteBook 840 G3 T9X59ET#ABD
6500U, HD Graphics 520, 46 Wh
Battery Runtime
-19%
-33%
-28%
-43%
-18%
Reader / Idle
1155
787
-32%
782
-32%
530
-54%
1020
-12%
H.264
591
623
5%
454
-23%
490
-17%
339
-43%
WiFi v1.3
571
438
-23%
417
-27%
430
-25%
309
-46%
453
-21%
Load
184
110
-40%
93
-49%
117
-36%
131
-29%
146
-21%

Pros

+ 坚固的机身
+ 低发热量
+ 相对完备的安全功能
+ LTE模组
+ 优秀的性能
+ 3年质保
+ 优秀的输入设备

Cons

- TN屏幕严重偏蓝,可视角度窄
- 不支持Thunderbolt 3或USB-C第二代标准
- 屏幕转轴有轻微的怪声
In review: HP EliteBook 840 G4. Test model courtesy of Notebook.de
In review: HP EliteBook 840 G4. Test model courtesy of Notebook.de

全新的惠普EliteBook 840 G4基本上只是前代机型G3的Kaby Lake处理器更新。机身的尺寸和品质在竞争中都不落下风,只有屏幕转轴发出的碎裂似的怪声和触控版按键的噪音有些影响它的整体印象。内部组件的易于维护是它的另一个优势,例如升级内存只需要很简单的操作。我们依然很喜欢它的输入设备,特别是键盘。

这台14寸商务笔记本电脑在性能或者散热噪音控制方面都没有让我们失望。这台设备十分安静,也不会变得太热,同时英特尔酷睿 i5-7200U可以完全发挥性能潜力。惠普也提高了它的电池容量,带来了接近10小时的续航时间。

优秀的机身,充沛的性能,低发热噪音——第四代的惠普EliteBook 840本可以是一台十分优秀的商务笔记本电脑。但这受到了较差的TN屏幕带来的负面影响,这样的屏幕对于一台售价1500欧元(约11015人民币)的设备让人难以理解。

惠普对EliteBook的改动很小从接口就可以看出来。你可以得到办公所需的所有重要接口,不过它没有搭配未来将更重要的Thunderbolt 3接口。

它的最大问题还是在于全高清TN屏幕。尽管亮度和分辨率都说得过去,但这块面板在其他的方面都很难让人满意。有限的可视角度范围在实际使用中会造成很大不便。这样一块屏幕不应该出现在一台售价1500欧元(约11015人民币)的商务设备中。如果你对EliteBook 840感兴趣的话,则需要选择搭配IPS屏幕的机型。我们不推荐这台搭配TN屏幕的测试机型。

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。 

HP EliteBook 840 G4-Z2V49ET ABD - 05/26/2017 v6(old)
Andreas Osthoff

Chassis
89 / 98 → 91%
Keyboard
89%
Pointing Device
87%
Connectivity
68 / 80 → 85%
Weight
69 / 20-67 → 100%
Battery
92%
Display
76%
Games Performance
54 / 68 → 79%
Application Performance
87 / 92 → 94%
Temperature
94%
Noise
97%
Audio
68%
Camera
27 / 85 → 32%
Average
77%
87%
Office - Weighted Average

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> Notebookcheck中文版(NBC中国) > 评测 > 惠普 EliteBook 840 G4 (7200U, 全高清) 笔记本电脑简短评测
Andreas Osthoff, 2017-04- 1 (Update: 2017-04- 1)