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Fujitsu LifeBook U9311X in review - 1 kg business convertible with LTE

Now with Tiger Lake and Thunderbolt 4. Fujitsu now equips its light business convertible with the latest Tiger Lake processors and Thunderbolt 4, but retains the familiar case and 16:9 screen. Despite the updated hardware, the Lifebook U9311X now feels a bit dusty.
Business Convertible / 2-in-1 Laptop Thunderbolt Tiger Lake Touchscreen Ultrabook Windows
Fujitsu LifeBook U9311X i7 LTE (LifeBook U Series)
Processor
Intel Core i7-1185G7 4 x 3 - 4.8 GHz, 40 W PL2 / Short Burst, 22 W PL1 / Sustained, Tiger Lake-UP3
Graphics adapter
Intel Iris Xe Graphics G7 96EUs
Memory
16 GB 
, LPDDR4-4266, Dual-Channel, Onboard
Display
13.30 inch 16:9, 1920 x 1080 pixel 166 PPI, capacitive, native pen support, LQ133M1JW48, IPS, glossy: yes, 60 Hz
Mainboard
Intel Tiger Lake-UP3 PCH-LP
Storage
Toshiba XG6 KXG6AZNV1T02, 1024 GB 
, 899 GB free
Soundcard
Intel Tiger Lake-U/Y PCH-LP - cAVS (Audio, Voice, Speech)
Connections
2 USB 3.0 / 3.1 Gen1, 2 USB 3.1 Gen2, 2 USB 3.2 Gen 2x2 20Gbps, 2 Thunderbolt, USB-C Power Delivery (PD), 1 HDMI, 2 DisplayPort, 1 Kensington Lock, 1 Docking Station Port, Audio Connections: 3.5 mm Stereo, Card Reader: SD (UHS-II), 1 SmartCard, 1 Fingerprint Reader
Networking
Intel Ethernet Connection I219-LM (10/100/1000MBit/s), Intel Wi-Fi 6 AX201 (a/b/g/h/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6/), Bluetooth 5.1, LTE Sierra Wireless EM7421 (Cat. 7), LTE
Size
height x width x depth (in mm): 17 x 309 x 215 ( = 0.67 x 12.17 x 8.46 in)
Battery
50 Wh, 3310 mAh Lithium-Polymer, 4-cell
Operating System
Microsoft Windows 10 Pro 64 Bit
Camera
Webcam: 1080p
Primary Camera: 2 MPix
Secondary Camera: 5 MPix with Autofocus
Additional features
Speakers: Stereo, Keyboard: Chiclet, Keyboard Light: yes, 65W PSU, Digitizer, 24 Months Warranty
Weight
1.029 kg ( = 36.3 oz / 2.27 pounds), Power Supply: 353 g ( = 12.45 oz / 0.78 pounds)
Price
2300 Euro
Links
Fujitsu homepage
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Possible competitors in comparison

Rating
Date
Model
Weight
Height
Size
Resolution
Best Price
85.6 %
09/2021
Fujitsu LifeBook U9311X i7 LTE
i7-1185G7, Iris Xe G7 96EUs		1 kg17 mm13.30"1920x1080
91.1 %
06/2021
Lenovo ThinkPad X13 Yoga G2
i7-1165G7, Iris Xe G7 96EUs		1.2 kg15.39 mm13.30"2560x1600
90.8 %
06/2021
HP Elite Dragonfly Max
i7-1185G7, Iris Xe G7 96EUs		1.2 kg16 mm13.30"1920x1080
86.3 %
10/2019
Dell XPS 13 7390 2-in-1 Core i7
i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU)		1.3 kg13 mm13.40"1920x1200

Case, equipment and input devices

We already know the magnesium case from the two predecessor models, the U9310X and U939X. It is still an extremely mobile business convertible with a weight of just over 1 kg (~2.2 pounds) including the stylus, but you can see the age of the case especially in the wide screen edges and the (by today's standards) tiny touchpad. The U9311X is also available in black if the red casing of our test device is too conspicuous.

An advantage is the extensive connectivity including a full SD card reader and even a Gigabit Ethernet port. Thunderbolt 4 is now also supported with the Tiger Lake update. Wi-Fi 6 with high transfer rates is also supported and an LTE module is also installed, but more modern options (Wi-Fi 6E and 5G) are already available here as well, which could be expected for a price of 2,300 Euros (~$2,716).

The keyboard is illuminated, but it still remains a small weak point. The keys are quite small and the pressure point is quite spongy. Other business convertibles from HP or Lenovo simply offer better inputs here.

Size comparison

❌
309 mm / 12.2 inch 215 mm / 8.46 inch 17 mm / 0.669 inch 1 kg2.27 lbs309 mm / 12.2 inch 215 mm / 8.46 inch 17 mm / 0.669 inch 1 kg2.26 lbs305 mm / 12 inch 213.9 mm / 8.42 inch 15.39 mm / 0.606 inch 1.2 kg2.69 lbs304.3 mm / 12 inch 197.6 mm / 7.78 inch 16 mm / 0.63 inch 1.2 kg2.57 lbs296 mm / 11.7 inch 207 mm / 8.15 inch 13 mm / 0.512 inch 1.3 kg2.93 lbs297 mm / 11.7 inch 210 mm / 8.27 inch 1 mm / 0.03937 inch 5.7 g0.01257 lbs
Left: Power supply, 2x Thunderbolt 4 (USB-C), HDMI, 1x USB-A 3.1 Gen1, 3.5 mm jack, smartcard reader
Left: Power supply, 2x Thunderbolt 4 (USB-C), HDMI, 1x USB-A 3.1 Gen1, 3.5 mm jack, smartcard reader
Right: Pen compartment, SIM card slot, power button, SD card reader, 1x USB-A 3.1 Gen1, Gigabit LAN, slot for a Kensington lock
Right: Pen compartment, SIM card slot, power button, SD card reader, 1x USB-A 3.1 Gen1, Gigabit LAN, slot for a Kensington lock
SD Card Reader
average JPG Copy Test (av. of 3 runs)
Fujitsu LifeBook U9311X i7 LTE
  (AV Pro V60)
149 MB/s
Dell XPS 13 7390 2-in-1 Core i7
  (Toshiba Exceria Pro M501 64 GB UHS-II)
144.6 MB/s -3%
Fujitsu LifeBook U9310X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
82.4 MB/s -45%
Average of class Convertible
  (17.7 - 209, n=36, last 2 years)
78.4 MB/s -47%
maximum AS SSD Seq Read Test (1GB)
Dell XPS 13 7390 2-in-1 Core i7
  (Toshiba Exceria Pro M501 64 GB UHS-II)
187.5 MB/s +9%
Fujitsu LifeBook U9311X i7 LTE
  (AV Pro V60)
172.8 MB/s
Average of class Convertible
  (22.6 - 263, n=35, last 2 years)
98.7 MB/s -43%
Fujitsu LifeBook U9310X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
88.3 MB/s -49%
Networking
iperf3 transmit AX12
Lenovo ThinkPad X13 Yoga G2
Intel Wi-Fi 6 AX201
1456 (702min - 1509max) MBit/s 0%
Fujitsu LifeBook U9311X i7 LTE
Intel Wi-Fi 6 AX201
1450 (1258min - 1519max) MBit/s
HP Elite Dragonfly Max
Intel Wi-Fi 6 AX201
1263 (990min - 1412max) MBit/s -13%
Average Intel Wi-Fi 6 AX201
  (49.8 - 1775, n=324)
1161 MBit/s -20%
Fujitsu LifeBook U9310X
Intel Wi-Fi 6 AX201
647 (617min - 677max) MBit/s -55%
Dell XPS 13 7390 2-in-1 Core i7
Intel Killer Wi-Fi 6 AX1650s
356 MBit/s -75%
iperf3 receive AX12
Fujitsu LifeBook U9311X i7 LTE
Intel Wi-Fi 6 AX201
1555 (1374min - 1656max) MBit/s
Lenovo ThinkPad X13 Yoga G2
Intel Wi-Fi 6 AX201
1333 (1301min - 1360max) MBit/s -14%
HP Elite Dragonfly Max
Intel Wi-Fi 6 AX201
1272 (1206min - 1323max) MBit/s -18%
Average Intel Wi-Fi 6 AX201
  (136 - 1743, n=324)
1261 MBit/s -19%
Fujitsu LifeBook U9310X
Intel Wi-Fi 6 AX201
930 (467min - 944max) MBit/s -40%
Dell XPS 13 7390 2-in-1 Core i7
Intel Killer Wi-Fi 6 AX1650s
640 MBit/s -59%
08517025534042551059568076585093510201105119012751360144515301615Tooltip
Fujitsu LifeBook U9311X i7 LTE; iperf3 receive AX12; iperf 3.1.3: Ø1554 (1374-1656)
Fujitsu LifeBook U9311X i7 LTE; iperf3 transmit AX12; iperf 3.1.3: Ø1450 (1258-1519)
ColorChecker
18.9 ∆E
15.1 ∆E
22.2 ∆E
23.7 ∆E
20.4 ∆E
13.9 ∆E
13.2 ∆E
23.3 ∆E
17.4 ∆E
21.7 ∆E
15.1 ∆E
10.6 ∆E
16.7 ∆E
12.9 ∆E
17 ∆E
10.5 ∆E
14.9 ∆E
14.4 ∆E
1.2 ∆E
6 ∆E
9.9 ∆E
10.7 ∆E
11 ∆E
8.6 ∆E
ColorChecker Fujitsu LifeBook U9311X i7 LTE: 14.55 ∆E min: 1.18 - max: 23.67 ∆E

Display - Lifebook with 16:9 IPS touchscreen

Subpixel arrangement
Subpixel arrangement
Minimal halos in the lower corners
Minimal halos in the lower corners

There are also no changes in the 13.3-inch IPS touchscreen with 1080p resolution (16:9) and anti-reflective surface, as Fujitsu relies on the same panel as last year. The subjective picture impression is still decent, but there is still PWM as soon as the brightness is at 30% or less. Halos are not a big problem, there is only a slight brightening in the lower two corners.

The sRGB color space is completely covered and after a calibration, the panel is also suitable for editing pictures/videos. However, the panel is already adjusted properly at the factory and the additional calibration is not necessary for productive tasks. The brightness is around 350 cd/m² and the contrast ratio is also good. Nevertheless, you have to watch out for reflections outdoors, otherwise comfortable use is no longer possible. The viewing angle stability of the IPS panel is very good.

354
cd/m²		358
cd/m²		357
cd/m²
352
cd/m²		348
cd/m²		359
cd/m²
342
cd/m²		332
cd/m²		351
cd/m²
Distribution of brightness
LQ133M1JW48 tested with X-Rite i1Pro 2
Maximum: 359 cd/m² (Nits) Average: 350.3 cd/m² Minimum: 18.8 cd/m²
Brightness Distribution: 92 %
Center on Battery: 355 cd/m²
Contrast: 1123:1 (Black: 0.31 cd/m²)
ΔE Color 2.8 | 0.5-29.43 Ø5, calibrated: 0.8
ΔE Greyscale 4.8 | 0.57-98 Ø5.3
68.8% AdobeRGB 1998 (Argyll 2.2.0 3D)
98.4% sRGB (Argyll 2.2.0 3D)
67.3% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.2
Fujitsu LifeBook U9311X i7 LTE
LQ133M1JW48, IPS, 1920x1080, 13.30		HP Elite Dragonfly Max
InfoVision X133NVFL R0, IPS, 1920x1080, 13.30		Lenovo ThinkPad X13 Yoga G2
LP133WQ1-SPF2, IPS LED, 2560x1600, 13.30		Dell XPS 13 7390 2-in-1 Core i7
Sharp LQ134N1, IPS, 1920x1200, 13.40		Fujitsu LifeBook U9310X
LQ133M1JW48, IPS, 1920x1080, 13.30
Display
1%
3%
-2%
Display P3 Coverage
67.3
68.3
1%
69.9
4%
66.4
-1%
sRGB Coverage
98.4
99.1
1%
99.2
1%
96.9
-2%
AdobeRGB 1998 Coverage
68.8
70.3
2%
71.5
4%
67.4
-2%
Response Times
21%
15%
375%
2%
Response Time Grey 50% / Grey 80% *
61.2 ?(32, 29.2)
44.8 ?(20.4, 24.4)
27%
52 ?(22, 30)
15%
47.6 ?(23.2, 24.4)
22%
62.4 ?(25.6, 26.8)
-2%
Response Time Black / White *
37.6 ?(18.8, 18.8)
32 ?(18.8, 13.2)
15%
32 ?(20, 12)
15%
29.2 ?(16, 13.2)
22%
34.4 ?(18, 16.4)
9%
PWM Frequency
211.9 ?(30)
2500 ?(25)
1080%
211.9 ?(30)
0%
Screen
33%
31%
16%
9%
Brightness middle
348
777.5
123%
460
32%
549.8
58%
345
-1%
Brightness
350
727
108%
423
21%
520
49%
317
-9%
Brightness Distribution
92
75
-18%
85
-8%
86
-7%
86
-7%
Black Level *
0.31
0.44
-42%
0.33
-6%
0.39
-26%
0.24
23%
Contrast
1123
1767
57%
1394
24%
1410
26%
1438
28%
Colorchecker dE 2000 *
2.8
1.62
42%
1
64%
2.12
24%
2.7
4%
Colorchecker dE 2000 max. *
6.8
5.26
23%
1.5
78%
3.66
46%
4.2
38%
Colorchecker dE 2000 calibrated *
0.8
1.32
-65%
0.8
-0%
1.37
-71%
1
-25%
Greyscale dE 2000 *
4.8
1.6
67%
1.2
75%
2.6
46%
3.3
31%
Gamma
2.2 100%
2.2 100%
2.26 97%
2.3 96%
2.31 95%
CCT
6978 93%
6538 99%
6652 98%
6884 94%
7188 90%
Color Space (Percent of AdobeRGB 1998)
72.3
64.4
65.4
62.4
Color Space (Percent of sRGB)
94.8
99.12
99.7
96.9
Total Average (Program / Settings)
27% / 31%
16% / 22%
131% / 85%
3% / 6%

* ... smaller is better

Display Response Times

ℹ
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
37.6 ms ... rise ↗ and fall ↘ combined↗ 18.8 ms rise
↘ 18.8 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 95 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (21.5 ms).
   ↔    Response Time 50% Grey to 80% Grey
61.2 ms ... rise ↗ and fall ↘ combined↗ 32 ms rise
↘ 29.2 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. » 96 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (33.7 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

ℹ
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 detected 211.9 Hz ≤ 30 % brightness setting

The display backlight flickers at 211.9 Hz (worst case, e.g., utilizing PWM) Flickering detected at a brightness setting of 30 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 211.9 Hz is relatively low, so sensitive users will likely notice flickering and experience eyestrain at the stated brightness setting and below.

In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 17900 (minimum: 5 - maximum: 3846000) Hz was measured.

Screenshots CalMAN measurement

CalMAN Grayscale
CalMAN Grayscale
CalMAN Saturation
CalMAN Saturation
CalMAN ColorChecker
CalMAN ColorChecker
CalMAN Grayscale calibrated
CalMAN Grayscale calibrated
CalMAN Saturation calibrated
CalMAN Saturation calibrated
CalMAN ColorChecker calibrated
CalMAN ColorChecker calibrated
In the sun
In the sun
In the sun
In the sun
Viewing angle stability
Viewing angle stability

Performance, emissions and battery life

Fujitsu uses the fast Core i7-1185G7 from Intel (Tiger Lake), which also supports vPro. Theoretically, this processor manages very high clock rates (up to 4.8 GHz), but this potential is hardly utilized. The processor is allowed to consume 40 watts for a short time, but it is only 22 watts after a few seconds. Thus, there is no real advantage over the previous processors here. The big advantage is the improved integrated graphics card, which can now be used for a bit of gaming. However, the performance remains stable in battery mode in contrast to the predecessor.

Overall, the system performance is very good, also thanks to the fast PCIe-SSD (3.0 x4), and the device implements inputs without noticeable delays. The test device also does not show any restrictions in our standardized latency test.

There are no restrictions in terms of temperatures, but the fan starts quite quickly during load and is also clearly audible, especially during high CPU load, but it usually remains deactivated in everyday office use. There are no annoying electronic noises like coil whine. The speakers are quite weak and many business devices now offer much more.

The battery life in the practical WLAN test is 7-8 hours depending on the brightness, which is slightly worse than the predecessor. The reason for this is probably the performance in battery mode, which is no longer reduced in the U9311X.

Cinebench R15 Multi Endurance test

04590135180225270315360405450495540585630675720765810Tooltip
Fujitsu LifeBook U9311X i7 LTE Intel Core i7-1185G7: Ø672 (651.67-816.61)
HP Elite Dragonfly Max Intel Core i7-1185G7: Ø569 (508.72-617.22)
Lenovo ThinkPad X13 Yoga G2 Intel Core i7-1165G7: Ø654 (610.84-834.6)
Dell XPS 13 7390 2-in-1 Core i7 Intel Core i7-1065G7: Ø672 (632.81-836.68)
Fujitsu LifeBook U9310X Intel Core i5-10210U: Ø512 (503.02-609)
Cinebench R23: Multi Core | Single Core
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
Cinebench R15: CPU Multi 64Bit | CPU Single 64Bit
Blender: v2.79 BMW27 CPU
7-Zip 18.03: 7z b 4 | 7z b 4 -mmt1
Geekbench 5.5: Multi-Core | Single-Core
HWBOT x265 Benchmark v2.2: 4k Preset
LibreOffice : 20 Documents To PDF
R Benchmark 2.5: Overall mean
Cinebench R23 / Multi Core
Average of class Convertible
  (616 - 18070, n=67, last 2 years)
9451 Points +162%
Average Intel Core i7-1185G7
  (3610 - 6383, n=24)
5324 Points +47%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
4754 Points +32%
HP Elite Dragonfly Max
Intel Core i7-1185G7
3861 (3696.44min - 3861max) Points +7%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
3610 Points
Cinebench R23 / Single Core
Average of class Convertible
  (307 - 1970, n=67, last 2 years)
1589 Points +27%
Average Intel Core i7-1185G7
  (1251 - 1532, n=24)
1449 Points +16%
HP Elite Dragonfly Max
Intel Core i7-1185G7
1401 Points +12%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
1305 Points +4%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
1251 Points
Cinebench R20 / CPU (Multi Core)
Average of class Convertible
  (242 - 6954, n=67, last 2 years)
3564 Points +150%
Average Intel Core i7-1185G7
  (1425 - 2493, n=28)
2039 Points +43%
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
2024 Points +42%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
1473 Points +3%
HP Elite Dragonfly Max
Intel Core i7-1185G7
1451 Points +2%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
1425 Points
Fujitsu LifeBook U9310X
Intel Core i5-10210U
1337 Points -6%
Cinebench R20 / CPU (Single Core)
Average of class Convertible
  (116.8 - 755, n=66, last 2 years)
610 Points +25%
Average Intel Core i7-1185G7
  (489 - 593, n=28)
557 Points +14%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
544 Points +11%
HP Elite Dragonfly Max
Intel Core i7-1185G7
543 Points +11%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
489 Points
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
465 Points -5%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
419 Points -14%
Cinebench R15 / CPU Multi 64Bit
Average of class Convertible
  (110.1 - 2889, n=68, last 2 years)
1584 Points +94%
Average Intel Core i7-1185G7
  (617 - 1066, n=32)
859 Points +5%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
835 (610.84min - 834.6max) Points +2%
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
830 Points +2%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
817 Points
HP Elite Dragonfly Max
Intel Core i7-1185G7
617 (508.72min - 617.22max) Points -24%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
609 (503.02min - 508.74max) Points -25%
Cinebench R15 / CPU Single 64Bit
Average of class Convertible
  (68.6 - 287, n=66, last 2 years)
232 Points +10%
Average Intel Core i7-1185G7
  (168 - 230, n=27)
215 Points +2%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
210.7 Points
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
210 Points 0%
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
174 Points -17%
HP Elite Dragonfly Max
Intel Core i7-1185G7
168 Points -20%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
165 Points -22%
Blender / v2.79 BMW27 CPU
Fujitsu LifeBook U9310X
Intel Core i5-10210U
862 Seconds * -23%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
778 Seconds * -11%
HP Elite Dragonfly Max
Intel Core i7-1185G7
738 Seconds * -6%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
699 Seconds *
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
679 Seconds * +3%
Average Intel Core i7-1185G7
  (478 - 745, n=28)
588 Seconds * +16%
Average of class Convertible
  (193 - 3620, n=62, last 2 years)
440 Seconds * +37%
7-Zip 18.03 / 7z b 4
Average of class Convertible
  (7703 - 72400, n=64, last 2 years)
39843 MIPS +100%
Average Intel Core i7-1185G7
  (18812 - 27693, n=27)
23288 MIPS +17%
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
22898 MIPS +15%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
19937 MIPS
HP Elite Dragonfly Max
Intel Core i7-1185G7
19688 MIPS -1%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
16540 MIPS -17%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
16102 MIPS -19%
7-Zip 18.03 / 7z b 4 -mmt1
Average of class Convertible
  (2046 - 6417, n=64, last 2 years)
5166 MIPS +6%
Average Intel Core i7-1185G7
  (3678 - 5507, n=27)
5112 MIPS +4%
HP Elite Dragonfly Max
Intel Core i7-1185G7
5100 MIPS +4%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
4934 MIPS +1%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
4894 MIPS
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
4434 MIPS -9%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
4130 MIPS -16%
Geekbench 5.5 / Multi-Core
Average of class Convertible
  (663 - 14016, n=68, last 2 years)
8265 Points +59%
Average Intel Core i7-1185G7
  (4620 - 5944, n=21)
5460 Points +5%
HP Elite Dragonfly Max
Intel Core i7-1185G7
5258 Points +1%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
5209 Points
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
4117 Points -21%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
3855 Points -26%
Geekbench 5.5 / Single-Core
Average of class Convertible
  (319 - 1981, n=68, last 2 years)
1617 Points +11%
HP Elite Dragonfly Max
Intel Core i7-1185G7
1520 Points +4%
Average Intel Core i7-1185G7
  (1398 - 1626, n=21)
1520 Points +4%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
1477 Points +1%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
1463 Points
Fujitsu LifeBook U9310X
Intel Core i5-10210U
1072 Points -27%
HWBOT x265 Benchmark v2.2 / 4k Preset
Average of class Convertible
  (0.61 - 20.1, n=66, last 2 years)
10.5 fps +95%
Average Intel Core i7-1185G7
  (5.02 - 8.13, n=27)
6.56 fps +22%
Dell XPS 13 7390 2-in-1 Core i7
Intel Core i7-1065G7
6.38 fps +18%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
5.39 fps
HP Elite Dragonfly Max
Intel Core i7-1185G7
5.12 fps -5%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
5 fps -7%
Fujitsu LifeBook U9310X
Intel Core i5-10210U
4.24 fps -21%
LibreOffice / 20 Documents To PDF
Fujitsu LifeBook U9310X
Intel Core i5-10210U
54.9 s * -8%
Average of class Convertible
  (42 - 223, n=64, last 2 years)
53.8 s * -5%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
51 s *
Average Intel Core i7-1185G7
  (41.3 - 61.7, n=26)
51 s * -0%
HP Elite Dragonfly Max
Intel Core i7-1185G7
45.9 s * +10%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
44.3 s * +13%
R Benchmark 2.5 / Overall mean
Fujitsu LifeBook U9310X
Intel Core i5-10210U
0.715 sec * -18%
Lenovo ThinkPad X13 Yoga G2
Intel Core i7-1165G7
0.615 sec * -2%
Fujitsu LifeBook U9311X i7 LTE
Intel Core i7-1185G7
0.605 sec *
HP Elite Dragonfly Max
Intel Core i7-1185G7
0.599 sec * +1%
Average Intel Core i7-1185G7
  (0.55 - 0.615, n=27)
0.586 sec * +3%
Average of class Convertible
  (0.4102 - 1.967, n=64, last 2 years)
0.538 sec * +11%

* ... smaller is better

PCMark 10 / Score
Average of class Convertible
  (1486 - 7963, n=60, last 2 years)
5726 Points +17%
Lenovo ThinkPad X13 Yoga G2
Iris Xe G7 96EUs, i7-1165G7, WDC PC SN730 SDBQNTY-1T00
5146 Points +5%
Average Intel Core i7-1185G7, Intel Iris Xe Graphics G7 96EUs
  (4746 - 5561, n=20)
5000 Points +2%
HP Elite Dragonfly Max
Iris Xe G7 96EUs, i7-1185G7, Toshiba XG6 KXG60ZNV512G
4932 Points +1%
Fujitsu LifeBook U9311X i7 LTE
Iris Xe G7 96EUs, i7-1185G7, Toshiba XG6 KXG6AZNV1T02
4899 Points
Dell XPS 13 7390 2-in-1 Core i7
Iris Plus Graphics G7 (Ice Lake 64 EU), i7-1065G7, Toshiba BG4 KBG40ZPZ512G
4677 Points -5%
Fujitsu LifeBook U9310X
UHD Graphics 620, i5-10210U, Toshiba KBG40ZNS512G NVMe
4133 Points -16%
DPC Latencies / LatencyMon - interrupt to process latency (max), Web, Youtube, Prime95
HP Elite Dragonfly Max
Iris Xe G7 96EUs, i7-1185G7, Toshiba XG6 KXG60ZNV512G
3249 μs * -322%
Fujitsu LifeBook U9310X
UHD Graphics 620, i5-10210U, Toshiba KBG40ZNS512G NVMe
2473 μs * -221%
Fujitsu LifeBook U9311X i7 LTE
Iris Xe G7 96EUs, i7-1185G7, Toshiba XG6 KXG6AZNV1T02
770 μs *
Lenovo ThinkPad X13 Yoga G2
Iris Xe G7 96EUs, i7-1165G7, WDC PC SN730 SDBQNTY-1T00
618 μs * +20%

* ... smaller is better

Fujitsu LifeBook U9311X i7 LTE
Toshiba XG6 KXG6AZNV1T02		HP Elite Dragonfly Max
Toshiba XG6 KXG60ZNV512G		Lenovo ThinkPad X13 Yoga G2
WDC PC SN730 SDBQNTY-1T00		Dell XPS 13 7390 2-in-1 Core i7
Toshiba BG4 KBG40ZPZ512G		Fujitsu LifeBook U9310X
Toshiba KBG40ZNS512G NVMe		Average Toshiba XG6 KXG6AZNV1T02
 		Average of class Convertible
 
CrystalDiskMark 5.2 / 6
-7%
18%
-11%
-9%
17%
24%
Write 4K
114.8
99
-14%
170.1
48%
106.7
-7%
134.2
17%
162.2 ?(114.8 - 216, n=4)
41%
148.4 ?(45.5 - 349, n=47, last 2 years)
29%
Read 4K
49.53
52.3
6%
53.4
8%
49.94
1%
53.4
8%
54.8 ?(49.5 - 60.8, n=4)
11%
62.3 ?(27.7 - 95.8, n=47, last 2 years)
26%
Write Seq
1833
1765
-4%
1866
2%
1223
-33%
1216
-34%
1745 ?(1435 - 1988, n=4)
-5%
2351 ?(402 - 4570, n=37, last 2 years)
28%
Read Seq
2260
2065
-9%
2077
-8%
1801
-20%
1291
-43%
1941 ?(1435 - 2260, n=4)
-14%
2650 ?(586 - 4763, n=37, last 2 years)
17%
Write 4K Q32T1
323.5
291.7
-10%
495.5
53%
325.3
1%
401.5
24%
493 ?(324 - 666, n=4)
52%
384 ?(171.6 - 745, n=47, last 2 years)
19%
Read 4K Q32T1
340.5
314
-8%
460.7
35%
551
62%
491.4
44%
542 ?(341 - 745, n=4)
59%
487 ?(79.6 - 892, n=47, last 2 years)
43%
Write Seq Q32T1
3048
2549
-16%
3015
-1%
1224
-60%
1224
-60%
2961 ?(2682 - 3057, n=4)
-3%
3011 ?(412 - 5232, n=47, last 2 years)
-1%
Read Seq Q32T1
3282
3282
0%
3407
4%
2350
-28%
2314
-29%
3190 ?(2902 - 3296, n=4)
-3%
4330 ?(1974 - 7131, n=47, last 2 years)
32%
3DMark - 1920x1080 Fire Strike Graphics
Average of class Convertible
  (365 - 29684, n=65, last 2 years)
5902 Points +11%
Fujitsu LifeBook U9311X i7 LTE
Intel Iris Xe Graphics G7 96EUs, Intel Core i7-1185G7
5332 Points
Average Intel Iris Xe Graphics G7 96EUs
  (2286 - 6143, n=207)
4905 Points -8%
Lenovo ThinkPad X13 Yoga G2
Intel Iris Xe Graphics G7 96EUs, Intel Core i7-1165G7
4616 Points -13%
HP Elite Dragonfly Max
Intel Iris Xe Graphics G7 96EUs, Intel Core i7-1185G7
3625 Points -32%
Dell XPS 13 7390 2-in-1 Core i7
Intel Iris Plus Graphics G7 (Ice Lake 64 EU), Intel Core i7-1065G7
3144 Points -41%
Fujitsu LifeBook U9310X
Intel UHD Graphics 620, Intel Core i5-10210U
1210 Points -77%
low med. high ultra
GTA V (2015) 82.9 68.7 24.5 11.2
The Witcher 3 (2015) 86 56 30 13.1
Dota 2 Reborn (2015) 81.2 61.8 47.3 44.4
Final Fantasy XV Benchmark (2018) 43.6 24.2 16.5
X-Plane 11.11 (2018) 33.7 29.8
Strange Brigade (2018) 87 39 32 26
F1 2020 (2020) 87 46 32 22

Noise emissions

Noise Level

Idle
23.5 / 23.5 / 28 dB(A)
Load
35 / 38.5 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
  
min: dark, med: mid, max: light   Earthworks M23R, Arta (15 cm distance)   environment noise: 23.5 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2027.727.828.529.830.527.72528.231.134.235.330.928.23122.52827.431.926.522.54023.527.130.833.325.123.55023.825.126.33025.923.86319.321.821.323.919.719.38032.618.330.726.817.132.610018.518.524.829.316.818.512515.816.616.918.915.915.816014.915.614.620.114.114.920016.319.715.917.713.416.325018.822.919.220.914.218.831527.81626.224.612.227.840022.314.122.628.910.822.350019.914.419.721.210.819.963021.514.421.323.210.721.580020.814.323.224.510.820.810002215.128.527.110.822125024.416.925.626.410.124.4160026.118.128.729.310.726.1200025.516.528.5301125.5250025.71527.628.911.125.7315022.713.625.627.511.622.7400021.513.224.826.111.721.5500019.114.721.222.91219.1630018.917.51819.712.318.9800017.81617.118.612.217.81000015.215.41414.812.215.21250016.216.71313.312.116.21600016.518.512.81311.616.5SPL352837.438.523.535N212.42.80.52median 19.9median 16median 21.3median 23.2median 11.7median 19.9Delta3.51.64.64.41.23.5hearing rangehide median Fan NoiseFujitsu LifeBook U9311X i7 LTE

Temperature

Max. Load
 41.2 °C
106 F		42.1 °C
108 F		39.9 °C
104 F		 
 33.9 °C
93 F		36.2 °C
97 F		28.4 °C
83 F		 
 26.8 °C
80 F		26.7 °C
80 F		25.1 °C
77 F		 
Maximum: 42.1 °C = 108 F
Average: 33.4 °C = 92 F
44.6 °C
112 F		46.7 °C
116 F		37 °C
99 F
29.8 °C
86 F		37.1 °C
99 F		35.9 °C
97 F
25.7 °C
78 F		27.8 °C
82 F		27.3 °C
81 F
Maximum: 46.7 °C = 116 F
Average: 34.7 °C = 94 F
Power Supply (max.)  40.8 °C = 105 F | Room Temperature 21.1 °C = 70 F | Fluke t3000FC (calibrated), Voltcraft IR-900
(±) The average temperature for the upper side under maximal load is 33.4 °C / 92 F, compared to the average of 30.2 °C / 86 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 42.1 °C / 108 F, compared to the average of 35.3 °C / 96 F, ranging from 19.6 to 55.7 °C for the class Convertible.
(-) The bottom heats up to a maximum of 46.7 °C / 116 F, compared to the average of 36.8 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 24.4 °C / 76 F, compared to the device average of 30.2 °C / 86 F.
(±) Playing The Witcher 3, the average temperature for the upper side is 33.2 °C / 92 F, compared to the device average of 30.2 °C / 86 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 26.9 °C / 80.4 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28.1 °C / 82.6 F (+1.2 °C / 2.2 F).
Surface temperatures stress test (top side)
Surface temperatures stress test (top side)
Surface temperatures stress test (bottom side)
Surface temperatures stress test (bottom side)

Speaker

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2030.529.42530.931.73126.529.24025.128.55025.929.86319.724.28017.121.710016.820.812515.924.616014.131.120013.439.425014.245.531512.249.640010.85550010.859.363010.761.580010.868.6100010.866.4125010.169.4160010.766.620001168.6250011.165.6315011.667.2400011.768.350001265.1630012.358.5800012.257.41000012.252.81250012.148.61600011.654.1SPL23.578.1N0.539.4median 11.7median 58.5Delta1.211.435.838.535.831.133.731.13029.53022.924.222.927.134.927.125.326.125.331.72831.743.523.343.552.426.152.462.319.262.367.917.867.973.117.773.174.717.874.774.417.274.473.214.373.272.813.272.877.71377.776.811.476.874.511.374.578.811.378.878.111.878.175.811.875.871.311.771.374.711.574.774.611.674.671.311.871.363.111.863.16213.66261.712.561.764.711.364.787.124.987.174.50.774.5median 73.2median 12.5median 73.25.32.65.3hearing rangehide median Pink NoiseFujitsu LifeBook U9311X i7 LTEHP Elite Dragonfly Max
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Fujitsu LifeBook U9311X i7 LTE audio analysis

(±) | speaker loudness is average but good (78.1 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 23.4% lower than median
(±) | linearity of bass is average (10.6% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 6.8% higher than median
(±) | linearity of mids is average (7.7% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 5.6% higher than median
(+) | highs are linear (6.4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (24.4% difference to median)
Compared to same class
» 71% of all tested devices in this class were better, 7% similar, 22% worse
» The best had a delta of 6%, average was 21%, worst was 57%
Compared to all devices tested
» 70% of all tested devices were better, 6% similar, 24% worse
» The best had a delta of 4%, average was 25%, worst was 134%

HP Elite Dragonfly Max audio analysis

(+) | speakers can play relatively loud (87.1 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.4% lower than median
(±) | linearity of bass is average (11.8% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.7% away from median
(+) | mids are linear (3.1% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 4.4% away from median
(+) | highs are linear (5.4% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (10.2% difference to median)
Compared to same class
» 5% of all tested devices in this class were better, 1% similar, 94% worse
» The best had a delta of 6%, average was 21%, worst was 57%
Compared to all devices tested
» 3% of all tested devices were better, 1% similar, 96% worse
» The best had a delta of 4%, average was 25%, worst was 134%

Energy consumption

Power Consumption
Off / Standbydarklight 0.14 / 0.48 Watt
Idledarkmidlight 3.5 / 6.1 / 7.2 Watt
Load midlight 39.9 / 54.9 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.

Power consumption Witcher 3 / Stress test

05101520253035404550Tooltip
Fujitsu LifeBook U9311X i7 LTE; Witcher 3 ultra: Ø34.1 (31.2-42.8)
Fujitsu LifeBook U9311X i7 LTE; 1280x720 Prime95 28.10 and Furmark 1.25: Ø36.2 (7.66-54.9)

Battery life

Battery Runtime
WiFi Websurfing
Fujitsu LifeBook U9310X
i5-10210U, UHD Graphics 620, 50 Wh
694 min +41%
HP Elite Dragonfly Max
i7-1185G7, Iris Xe G7 96EUs, 56 Wh
659 min +34%
Average of class Convertible
  (329 - 876, n=63, last 2 years)
564 min +15%
Lenovo ThinkPad X13 Yoga G2
i7-1165G7, Iris Xe G7 96EUs, 52.8 Wh
555 min +13%
Dell XPS 13 7390 2-in-1 Core i7
i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 51 Wh
537 min +9%
Fujitsu LifeBook U9311X i7 LTE
i7-1185G7, Iris Xe G7 96EUs, 50 Wh
492 min
WiFi Websurfing max. Brightness
Fujitsu LifeBook U9310X
i5-10210U, UHD Graphics 620, 50 Wh
488 min +19%
Average of class Convertible
  (300 - 566, n=20, last 2 years)
415 min +1%
Fujitsu LifeBook U9311X i7 LTE
i7-1185G7, Iris Xe G7 96EUs, 50 Wh
409 min
Lenovo ThinkPad X13 Yoga G2
i7-1165G7, Iris Xe G7 96EUs, 52.8 Wh
337 min -18%
Battery Runtime
WiFi Websurfing (Edge 93)
8h 12min
WiFi Websurfing max. Brightness (Edge 93)
6h 49min

Pros

+ lightweight magnesium housing
+ extensive connections with TB4
+ good system performance
+ many security features
+ Stylus in the case
+ LTE

Cons

- Working memory not expandable
- PWM with a low frequency
- mediocre keyboard
- reduced battery life

Verdict - Fujitsu's convertible needs a redesign

In review: Fujitsu Lifebook U9311X. Test device provided by Fujitsu Germany.
In review: Fujitsu Lifebook U9311X. Test device provided by Fujitsu Germany.

The leap from last year's Lifebook U9310X (or the older U939X) to the current Lifebook U9311X is quite small. Fujitsu does use current Tiger Lake processors from Intel and the two USB-C ports now support Thunderbolt 4, but everything else remains the same.

The magnesium case is still very light and offers extensive ports, but the 16:9 screen including the wide screen borders as well as the small touchpad show the case's age. The keyboard also has to admit defeat to other business devices.

The Lifebook U9311X is still a compact mobile companion including LTE, but you slowly notice the age of the design. We would like to see a 16:10 screen and better input devices for the next generation.

All in all, the U9311X naturally remains an extremely mobile companion with good connectivity. Especially in the area of display and input devices, competitors like the Lenovo ThinkPad X13 Yoga G2 or the EliteBook Dragonfly Max from HP often offer more. Furthermore, the performance yield is a bit disappointing and the full potential of the i7-1185G7 cannot be exploited at all; the cheaper version with the Core i5 should not have any major drawbacks in practice.

Price and availability

Our test configuration is available at Cyberport for €2,330 (~$2,735) or €2,280 (~$2,675) for the black model. A cheaper configuration with a Core i5 processor and a 512 GB SSD is available for €1,780 (~$2,090).

Fujitsu LifeBook U9311X i7 LTE - 09/22/2021 v7
Andreas Osthoff

Chassis
80 / 98 → 81%
Keyboard
72%
Pointing Device
82%
Connectivity
81 / 75 → 100%
Weight
75 / 20-75 → 99%
Battery
81%
Display
86%
Games Performance
67 / 78 → 86%
Application Performance
87 / 85 → 100%
Temperature
90%
Noise
94%
Audio
64 / 91 → 71%
Camera
37 / 85 → 44%
Average
77%
86%
Convertible - Weighted Average

Pricecompare

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > Reviews > Fujitsu LifeBook U9311X in review - 1 kg business convertible with LTE
Andreas Osthoff, 2021-09-23 (Update: 2021-09-23)