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日本Dell Latitude 7455 review – All-Day Companion with Premium Display
The 14-inch Dell Latitude 7455 is offered with new Qualcomm CPUs. This includes the Snapdragon X Elite X1E-80-100 with eight P cores and four E cores. The more modest Snapdragon X Plus X1P-64-100 has two fewer performance cores than its bigger sibling. The main focus here is the powerful NPU chip for accelerated AI productivity.
There is just one display model but this one sounds great on paper – 1600p resolution alongside touchscreen capabilities. The port selection doesn’t include many connectors but at least you get two full-function 40 Gbps USB4s. This device relies on Type-C charging which means one of the fancy ports isn’t available when the adapter is plugged in.
That’s a thin and light notebook, that’s why the memory is soldered. However, the storage capabilities are also limited. On the bright side, you get a 4-speaker audio setup and Wi-Fi 7 + Bluetooth 5.4 for connectivity. The IR Web camera with a privacy shutter, the optional fingerprint reader, and the dTPM 2.0 chip are the security options. It’s nice to see that the keyboard has a backlight.
You can check the prices and configurations in our Specs System: https://laptopmedia.com/series/dell-latitude-14-7455/
Contents
Specs, Drivers, What’s in the box
Dell Latitude 14 7455 - Specs
- Display
- 14.0", QHD+ (2560 x 1600), IPS
- HDD/SSD
- up to 1000GB SSD
- M.2 Slot
- 1x 2230 PCIe NVMe 4.0 x4 See photo
- RAM
- up to 32GB
- OS
- Windows 11 Pro, Windows 11 Home
- Battery
- 54Wh
- Body material
- Aluminum
- Dimensions
- 314 x 223.7 x 14.69 – 15.64 mm (12.36" x 8.81" x 0.58")
- Weight
- 1.44 kg (3.2 lbs)
- Ports and connectivity
- 1x USB Type-A
- 3.2 Gen 1 (5 Gbps)
- 2x USB Type-C
- 4.0, Power Delivery (PD), DisplayPort
- Card reader
- microSD (microSD, microSDHC, microSDXC)
- Ethernet LAN
- Wi-Fi
- 802.11be
- Bluetooth
- 5.4
- Audio jack
- 3.5mm Combo Jack
- Features
- Fingerprint reader
- Web camera
- FHD
- Backlit keyboard
- Microphone
- Dual Array Microphone with Qualcomm Audio and Voice Communication Suite
- Optical drive
- Security Lock slot
All Dell Latitude 14 7455 configurations
Drivers
All drivers and utilities for this notebook can be found here: https://www.dell.com/support/home/en-us/product-support/product/latitude-14-7455-laptop/drivers
What’s in the box?
The package contains the mandatory paperwork and a 65W Type-C charger.
Design and construction
No surprises in the design department, the Latitude 7455 looks like a typical Dell business device. The aluminum chassis is rigid. You can twist the lid but not too much and the base feels solid when we try to push it down hard on purpose.
The lid can’t be opened with a single hand. Ouch, that hurts, considering the price of this device. The dimensions are compact – 14.69 – 15.64 mm profile and 1.44 kg weight.
We like what we are seeing – thin bezels around a high-res display.
The 1080p IR Web camera with a privacy shutter is positioned above the screen.
The lid has a lever design that lifts the back of the base when the angle of opening is bigger than 90 degrees. This enhances the capabilities of the simple cooling system with just one heat pipe.
The backlit keyboard has big keycaps with good travel (not the longest though) and nice feedback. Of course, the board has a Copilot key for summoning the MS AI magic. The Power button in the top right corner doubles as a fingerprint reader (option).
The touchpad size is okay for this kind of small chassis – 115×80 mm. The pad surface is averagely smooth and the accuracy is normal but not the best.
The bottom plate is business as usual – one ventilation grill, three rubber feet, and two speaker cutouts. The heat is pushed through a vent on the back.
Ports
On the left side, you get a pair of 40 Gbps Thunderbolt 4 / USB4 ports with DisplayPort 2.1 and Power Delivery capabilities followed by a MicroSD card slot. On the right, there is an Audio combo jack and a 5 Gbps USB Type-A 3.2 (Gen. 1) port. The laptops with a WWAN slot have an optional nano-SIM slot (our machine lacks this extra).
Display and Sound Quality, Get our Profiles
Dell Latitude 7455 is equipped with a WQXGA IPS panel, model number AUO 69R1W-B140QAX (AUO0BA4). It comes with a 60Hz refresh rate. Its diagonal is 14.0″ (35.6 cm), and the resolution – 2560 x 1600p. Additionally, the screen ratio is 16:10, the pixel density – 216 ppi, and their pitch – 0.12 x 0.12 mm. The screen can be considered Retina when viewed from at least 41 cm (this is based on the pixel density and the typical viewing distance at which individual pixels cannot be distinguished by the human eye).
Viewing angles are good. We offer images at different angles to evaluate the quality.
Also, a video with locked focus and exposure.
The maximum measured brightness is 418 nits (cd/m2) in the middle of the screen and 427 nits (cd/m2) average across the surface with a maximum deviation of just 11%. The Correlated Color Temperature on a white screen and at maximum brightness is 7130К.
In the illustration below you can see how the display performs from a uniformity perspective. The illustration below shows how matters are for operational brightness levels (approximately 180 nits) – in this particular case at 50% Brightness (White level = 183 cd/m2, Black level = 0.11 cd/m2).
Values of dE2000 over 4.0 should not occur, and this parameter is one of the first you should check if you intend to use the laptop for color-sensitive work (a maximum tolerance of 2.0). We measured a fairly good contrast ratio – 1670:1.
To make sure we are on the same page, we would like to give you a little introduction to the sRGB color gamut and the Adobe RGB. To start, there’s the CIE 1976 Uniform Chromaticity Diagram that represents the visible specter of colors by the human eye, giving you a better perception of the color gamut coverage and the color accuracy.
Inside the black triangle, you will see the standard color gamut (sRGB) that is being used by millions of people on HDTV and on the web. As for the Adobe RGB, this is used in professional cameras, monitors, etc for printing. Basically, colors inside the black triangle are used by everyone and this is the essential part of the color quality and color accuracy of a mainstream notebook.
Still, we’ve included other color spaces like the famous DCI-P3 standard used by movie studios, as well as the digital UHD Rec.2020 standard. Rec.2020, however, is still a thing of the future and it’s difficult for today’s displays to cover that well. We’ve also included the so-called Michael Pointer gamut, or Pointer’s gamut, which represents the colors that naturally occur around us every day.
The yellow dotted line shows Dell Latitude 7455’s color gamut coverage.
Its display covers 98% of the sRGB/ITU-R BT.709 (web/HDTV standard) in CIE1976, and 82% of DCI-P3.
Our “Design and Gaming” profile delivers optimal color temperature at 180 cd/m2 luminance (Illuminant white point – D65), sRGB encoding curve.
We tested the accuracy of the display with 24 commonly used colors like light and dark human skin, blue sky, green grass, orange, etc.
Below you can compare the scores of the Dell Latitude 7455 with the default settings (left), and with the “Gaming and Web design” profile (right), compared to the sRGB color space.
The next figure shows how well the display is able to reproduce really dark parts of an image, which is essential when watching movies or playing games in low ambient light.
The left side of the image represents the display with stock settings, while the right one is enhanced with the “Gaming and Web Design” profile activated. On the horizontal axis, you will find the grayscale, and on the vertical axis – the luminance of the display. On the two graphs below you can easily check for yourself how your display handles the darkest nuances but keep in mind that this also depends on the settings of your current display, the calibration, the viewing angle, and the surrounding light conditions.
Response time (Gaming capabilities)
We test the reaction time of the pixels with the usual “black-to-white” and “white-to-black” method from 10% to 90% and vice versa (these terms refer to the time it takes for pixels to change from one color to another (black to white and back to black in this case), a shorter time reduces picture blur with fast moving images).
We recorded Fall Time + Rise Time = 23 ms.
After that, we test the reaction time of the pixels with the usual “Gray-to-Gray” method from 50% White to 80% White and vice versa between 10% and 90% of the amplitude.
Health Impact: PWM (Screen flickering)
Pulse-width modulation (PWM) is an easy way to control monitor brightness. When you lower the brightness, the light intensity of the display is not lowered, but instead turned off and on by the electronics with a frequency indistinguishable to the human eye. In these light impulses, the light/no-light time ratio varies, while brightness remains unchanged, which is harmful to your eyes. You can read more about that in our dedicated article on PWM.
Dell Latitude 7455’s display doesn’t use PWM for brightness adjustment. This makes the screen pretty comfortable for long periods of use.
Health Impact: Blue light emissions
Installing our Health-Guard profile not only eliminates the harmful pulsations, when the laptop uses such for brightness control but also reduces the harmful Blue Light emissions while keeping the colors of the screen perceptually accurate. If you’re not familiar with the Blue light, the TL;DR version is – emissions that negatively affect your eyes, skin, and your whole body. You can find more information about that in our dedicated article on Blue Light.
Health Impact: Screen Reflectance
Glossy-coated displays can be inconvenient in high ambient light conditions due to reflections. We measure the screen reflection level for each laptop when the display is turned off and the measurement angle is set at 60°.
The reflectance of the Dell’s screen is 54.3 GU.
High Gloss: >70 GU
Medium Gloss: 30 – 70 GU
Low Gloss: <30 GU
Sound
Dell Latitude 7455’s speakers produce a sound of relatively good quality. However, the low, mid, and high tones all have some slight deviations from clarity.
Buy our profiles
Since our profiles are tailored for each individual display model, this article and its respective profile package are meant for Dell Latitude 7455 configuration with 14.0″ AUO 69R1W-B140QAX (AUO0BA4) (2560×1600) IPS.
*Should you have problems with downloading the purchased file, try using a different browser to open the link you’ll receive via e-mail. If the download target is a .php file instead of an archive, change the file extension to .zip or contact us at [email protected].
Read more about the profiles HERE.
In addition to receiving efficient and health-friendly profiles, by buying LaptopMedia's products you also support the development of our labs, where we test devices in order to produce the most objective reviews possible.
Office Work
Office Work should be used mostly by users who spend most of the time looking at pieces of text, tables or just surfing. This profile aims to deliver better distinctness and clarity by keeping a flat gamma curve (2.20), native color temperature and perceptually accurate colors.
Design and Gaming
This profile is aimed at designers who work with colors professionally, and for games and movies as well. Design and Gaming takes display panels to their limits, making them as accurate as possible in the sRGB IEC61966-2-1 standard for Web and HDTV, at white point D65.
Health-Guard
Health-Guard eliminates the harmful Pulse-Width Modulation (PWM) and reduces the negative Blue Light which affects our eyes and body. Since it’s custom tailored for every panel, it manages to keep the colors perceptually accurate. Health-Guard simulates paper so the pressure on the eyes is greatly reduced.
Get all 3 profiles with 33% discount
Performance: CPU, GPU, Storage
All benchmarks and tests were conducted with the “Best performance” preset activated in the Windows “Power & Battery” menu. Also, the “Ultra Performance” mode is enabled in the Dell Optimizer app.
CPU options
This machine is offered with Qualcomm Snapdragon X Elite X1E-80-100 or Qualcomm Snapdragon X Plus X1P-64-100.
Our notebook has an X1E-80-100 chip.
Here, we evaluate the CPU's performance using a real-world 3D rendering task, assessing its ability to handle complex computations and rendering workloads efficiently.
Results are from the Cinebench 2024 Multi-Core test (higher is better)
Single-core performance ensures smooth operation and responsiveness in operating systems, providing a better user experience.
Results are from the Geekbench 6 Single-Core test (higher is better)
Multi-core performance is essential for handling complex and demanding tasks, such as Video editing, CAD, and Scientific simulations.
Results are from the Geekbench 6 Multi-Core test (higher is better)
GPU options
There are no dGPU options for this Dell series.
That’s why the iGPU of our laptop is the Qualcomm Snapdragon X Elite Adreno GPU.
The results are from 3DMark Time Spy (Graphics). Higher is better.
The results are from 3DMark Wild Life Extreme Unlimited. Higher is better.
Gaming tests
| CS:GO | HD 1080p, Low (Check settings) | HD 1080p, Medium (Check settings) | HD 1080p, MAX (Check settings) |
|---|---|---|---|
| Average FPS | 133 fps | 166 fps | 79 fps |
| DOTA 2 | HD 1080p, Low (Check settings) | HD 1080p, Normal (Check settings) | HD 1080p, High (Check settings) |
|---|---|---|---|
| Average FPS | 83 fps | 75 fps | 67 fps |
Storage performance
The SSD of our notebook is the 512GB Micron 2550. Its speeds are fairly decent and the NVMe drive reaches 71°C which is still within reasonable limits.
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Temperatures and comfort, Battery Life
Max CPU load
In this test we use 100% on the CPU cores, monitoring their frequencies and chip temperature. The first column shows a computer’s reaction to a short load (2-10 seconds), the second column simulates a serious task (between 15 and 30 seconds), and the third column is a good indicator of how good the laptop is for long loads such as video rendering.
Average P-core frequency; Average E-core frequency
| Qualcomm Snapdragon X Elite X1E-80-100 (21W TDP) | 0:02 – 0:10 sec | 0:15 – 0:30 sec | 10:00 – 15:00 min |
|---|---|---|---|
| Dell Latitude 7455 | 4.01 GHz @ 3.42 GHz | 4.01 GHz @ 3.42 GHz | 1.90 GHz @ 1.90 GHz |
The Qualcomm Snapdragon X Elite X1E-80-100 CPU can maintain a 4.00 GHz / 3.40 GHz P and E core clocks in short and medium loads which is a strong result. Still, in the long run, the frequency for all cores is around 1.90 GHz. That’s due to the simple cooling with one fan.
Comfort during full load
The Dell Optimizer app offers four power presets. When the CPU is pounded with tons of stress in “Ultra Performance” mode, the single fan is moderately noisy.
In this scenario, the hotspot on the keyboard is on the WASD section, reaching 55°C. The lower bezel is 1°C degree warmer (in the zone in front of the back exhaust vent).
The noise is notably reduced in “Optimized” mode but the clock for all cores is also hindered to around 1670 MHz.
“Ultra Performance”
“Optimized”Battery
Now, we conduct the battery tests with the Windows Best Power Efficiency setting turned on, screen brightness adjusted to 180 nits and all other programs turned off except for the one we are testing the notebook with. The 54Wh battery lasts for 16 hours of video playback. The result is great! To achieve that, you have to apply the “Best Power Efficiency” preset in the Windows “Power & Battery” menu and select the “Quiet” power plan in the Dell Optimizer app.
Brightness: 180 nits; Display Mode: SDR
Time to Full Discharge: Higher is Better
Disassembly, Upgrade options, and Maintenance
To open this compact device, you have to undo 7 Phillips-head screws. The ones in the top two edges are captive and they’ll lift the panel up. Pry the sides and the front with a thin plastic tool, the back should be last.
Here’s how the bottom plate looks on the inside.
This machine has a 54Wh battery. To take it out, unplug the connector from the mainboard and undo the 5 Phillips-head screws that secure the unit to the base. The capacity is enough for around 16 hours of video playback.
The memory is soldered. You get 16 or 32GB of LPDDR5x-8448MHz RAM. For storage, there is just one M.2 slot compatible with the shortest 2230 Gen 4 SSDs. The NVMe is covered by a metal plate that is held in place by a single screw. After undoing it, you have to pull the shroud forward. The metal cap houses a thermal pad on the inside.
The Wi-Fi card is placed close to the cooling fan. The removal of the metal cover here is similar to the one of the SSD but this time around, you have to slide the small plate to the left. There is also a cooling pad beneath it.
The thermal system is as simple as it gets – one fan, a single long heat pipe, one heat sink, and a large heat spreader.
Verdict
If you are looking for a compact laptop with good AI capabilities, the Dell Latitude 7455 could be a good choice for your needs because of the Qualcomm CPU with its powerful NPU. The aluminum chassis is solid and the backlit keyboard is fairly good considering the thin profile of 14.69 – 15.64 mm.
The Qualcomm Snapdragon X Elite X1E-80-100 CPU can sustain 4.00 GHz / 3.40 GHz P and E-core clock in short and medium loads which is a great score for a light 14-incher. However, in long stress, the frequencies are almost halved. The single fan is audible but not too noisy. When the processor is pushed to its limits for prolonged periods, the WASD zone reaches 55°C. This could be hot for some users but we think that these temperatures are still acceptable.
The 60Hz 1600p touchscreen AUO 69R1W-B140QAX (AUO0BA4) is all you need for daily or office work. The panel has 418 nits of max brightness, 98% sRGB coverage, and a 1670:1 contrast ratio. The color accuracy is even suitable for content creation when our “Design and Gaming” profile is applied.
The Latitude 7455 is a thin device with a very long battery life, great AI capabilities, and a color-accurate PWM-free IPS display.
You can check the prices and configurations in our Specs System: https://laptopmedia.com/series/dell-latitude-14-7455/
Pros
- The fan isn’t too noisy under long 100% CPU loads in “Ultra Performance” mode
- Solid aluminum build
- Comfortable keyboard
- No PWM (AUO0BA4)
- 98% sRGB coverage + accurate colors with our “Design and Gaming” profile (AUO0BA4)
- 1670:1 contrast ratio + 418 nit max brightness (AUO0BA4)
- Up-to-date port selection with 2x Thunderbolt 4 ports + MicroSD card slot
- Very long battery life
- 1080p IR Web camera with a privacy shutter
- Fingerprint reader + Nano SIM slot (all are optional)
- The CPU can sustain 4.00 GHz / 3.40 GHz P and E-core clock in short and medium loads
- The bottom panel can be easily popped
Cons
- Pricey for what it is
- Soldered RAM + one M.2 slot
- Some apps and games don’t work at all
- Just 1.90 GHz CPU clock in heavy loads
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