Comparison between:
- Amazon Kindle Fire HDX 7
- Asus ZenPad Z8
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Amazon Kindle Fire HDX 7 | Asus ZenPad Z8 | |
 |  | |
| Model alias | Wi-Fi 4G LTE + Wi-Fi | ZT581KL |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 186 mm 18.6 cm 0.61 ft 7.323 in | 205.2 mm 20.52 cm 0.673 ft 8.079 in |
| Height | 128 mm 12.8 cm 0.42 ft 5.039 in | 136.4 mm 13.64 cm 0.448 ft 5.37 in |
| Thickness | 9 mm 0.9 cm 0.03 ft 0.354 in | 7.62 mm 0.762 cm 0.025 ft 0.3 in |
| Weight | 311 g 0.69 lbs 10.97 oz | 310 g 0.68 lbs 10.93 oz |
| Volume | 214.27 cm³ 13.01 in³ | 213.28 cm³ 12.95 in³ |
| Colors | Black | Black |
SIM card
The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.
| SIM card type | Micro-SIM | Micro-SIM |
| Number of SIM cards | 1 | 1 |
Networks
A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.
| GSM | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz | - |
| CDMA2000 | 1xEV-DO Rev. A | - |
| UMTS | UMTS 850 MHz UMTS 900 MHz UMTS 1900 MHz UMTS 2100 MHz | - |
| LTE | LTE 700 MHz Class 17 LTE 1700/2100 MHz | LTE 700 MHz Class 13 LTE 1700/2100 MHz LTE 1900 MHz |
Mobile network technologies and bandwidth
Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.
| Mobile network technologies | UMTS EDGE GPRS HSPA+ LTE EV-DO Rev. A | LTE Cat 4 |
Operating system
Operating system is the system software, which manages and controls the functioning of the hardware components of the device.
| Operating system (OS) | Fire OS 3.0 (Android 4.2.2 Jelly Bean) | Android 6.0.1 Marshmallow |
| User interface (UI) | Mojito | ZenUI |
System on Chip (SoC)
A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.
| SoC | Qualcomm Snapdragon 800 MSM8974AA | Qualcomm Snapdragon 650 MSM8956 |
| Process technology | 28 nm | 28 nm |
| CPU | Krait 400 | 2x 1.8 GHz ARM Cortex-A72, 4x 1.2 GHz ARM Cortex-A53 |
| CPU bits | 32 bit | 64 bit |
| Instruction set | ARMv7 | ARMv8 |
| Level 0 cache memory (L0) | 4 KB + 4 KB | - |
| Level 1 cache memory (L1) | 16 KB + 16 KB | - |
| Level 2 cache memory (L2) | 2048 KB 2 MB | - |
| CPU cores | 4 | 6 |
| CPU frequency | 2200 MHz | 1800 MHz |
| GPU | Qualcomm Adreno 330 | Qualcomm Adreno 510 |
| GPU cores | 4 | - |
| GPU frequency | 450 MHz | 550 MHz |
| RAM capacity | 2 GB | 2 GB |
| RAM type | LPDDR3 | LPDDR3 |
| RAM channels | Double channel | Single channel |
| RAM frequency | 800 MHz | 933 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 16 GB 32 GB 64 GB | 16 GB |
| - | eMMC |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | - | microSD microSDHC microSDXC |
Display
The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.
| Type/technology | IPS | IPS |
| Diagonal size | 7 in 177.8 mm 17.78 cm | 7.9 in 200.66 mm 20.07 cm |
| Width | 5.94 in 150.77 mm 15.08 cm | 6.32 in 160.53 mm 16.05 cm |
| Height | 3.71 in 94.23 mm 9.42 cm | 4.74 in 120.4 mm 12.04 cm |
| Aspect ratio | 1.6:1 16:10 | 1.333:1 4:3 |
| Resolution | 1920 x 1200 pixels | 2048 x 1536 pixels |
| Pixel density | 323 ppi 126 ppcm | 324 ppi 127 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 59.87 % | 69.27 % |
| Other features | Capacitive Multi-touch | Capacitive Multi-touch |
| Polarizing filter | Viewing angle - 178° |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Light Accelerometer Gyroscope | Proximity Light Accelerometer Compass Gyroscope Hall |
Rear camera
The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.
| Sensor type | - | CMOS |
| Aperture | f/2.2 | - |
| Flash type | LED | - |
| Image resolution | 1280 x 1024 pixels 1.31 MP | 3264 x 2448 pixels 7.99 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps |
| Features | - | Continuous shooting Digital zoom Digital image stabilization Geotagging Panorama HDR Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode |
Front camera
Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.
| Image resolution | - | 1600 x 1200 pixels 1.92 MP |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece Stereo speakers | Loudspeaker Stereo speakers |
| Maxim MAX97236 WCD9320 | DTS-HD |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | - | No |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GPS (4G LTE + Wi-Fi) A-GPS (4G LTE + Wi-Fi) | GPS A-GPS GLONASS |
Wi-Fi
Wi-Fi is a technology that provides wireless data connections between various devices within a short range.
| Wi-Fi | 802.11a 802.11b 802.11g 802.11n Dual band | 802.11a 802.11b 802.11g 802.11n 802.11ac Wi-Fi Hotspot Wi-Fi Display |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | - | 4.1 |
| Features | A2DP | A2DP |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | Micro USB | USB Type-C |
| Version | 2.0 | 2.0 |
| Features | Charging Mass storage | Charging Mass storage |
Headphone jack
The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.
| Headphone jack | Yes | Yes |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync | Computer sync OTA sync Tethering |
Browser
A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.
| Browser | HTML HTML5 CSS 3 | HTML HTML5 CSS 3 |
Audio file formats/codecs
Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.
| Audio file formats/codecs | AC3 AMR AMR-WB eAAC+ MIDI MP3 OGG WMA WAV | AAC AMR aptX eAAC+ FLAC MIDI MP3 OGG WMA WAV |
Video file formats/codecs
Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.
| Video file formats/codecs | 3GPP MKV MP4 VP8 WebM | 3GPP AVI DivX Flash Video QuickTime MP4 WebM WMV Xvid |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 4550 mAh | 4680 mAh |
| Type | Li-Polymer | Li-Polymer |
| Features | Non-removable | Non-removable |
| Battery life - up to 17 h | Battery life - up to 13 h Stand by time - up to 550 h |
Specific Absorption Rate (SAR)
The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.
| Body SAR (USA) | - | 1.05 W/kg |
| Amazon Kindle Fire HDX 7 | Asus ZenPad Z8 |