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Asus ZenFone 2 Deluxe ZE551ML Smartphone Review

Andreas Osthoff, 01/09/2016

Powered by Intel. The Asus ZenFone 2 Deluxe is pretty well-equipped: Intel quad-core processor, 4 GB of RAM, 128 GB of storage, dual-SIM and PixelMaster camera. Has the manufacturer created a convincing overall package?

For the original German review, see here.

The ZenFone 2 Deluxe is the high-end smartphone from Asus and with its unusual design aims to attract customers. Moreover, at a first glance, the features of the 5.5-inch smartphone are also decent and there are even some real highlights like the huge 128 GB of storage as well as the quad-core processor from Intel plus 4 GB of RAM. Other interesting aspects are the dual-SIM function, storage expansion via microSD and a camera that is also supposed to take good pictures in low-light conditions.

Our review unit retails for 499 Euros (~$545) and competes with other flagship devices. These include the Motorola Moto X Style, the Huawei Mate S, the LG G4 or the Samsung Galaxy S6, for example.

Asus Zenfone 2 Deluxe ZE551ML
Processor
Intel Atom Z3580 2.33 GHz
Graphics adapter
Memory
4096 MB 
, LPDDR3
Display
5.5 inch 16:9, 1920x1080 pixel, capacitive, IPS, Corning Gorilla Glass 3, Anti-Fingerprint Technology, glossy: yes
Storage
128 GB eMMC Flash, 128 GB 
, 111 GB free
Connections
1 USB 2.0, Audio Connections: 3.5 mm combo, Card Reader: microSD (up to 128 GB), Sensors: G-Sensor, E-Compass, Proximity sensor, Hall Sensor, Ambient light sensor, USB-OTG, Dual-SIM, FM-radio
Networking
802.11 a/b/g/n/ac (a/b/g/n/ac), Bluetooth 4.0, 2G (850/900/1800/1900 MHz), 3G UMTS (850/900/1900/2100 MHz), 4G LTE Cat.4 (700/800/850/900/1700/1800/1900/2100 MHz), LTE, GPS
Size
height x width x depth (in mm): 10.9 x 152.5 x 77.2 ( = 0.43 x 6 x 3.04 in)
Battery
3000 mAh Lithium-Polymer, Talk time 2G (according to manufacturer): 28.5 h, Talk time 3G (according to manufacturer): 19 h, Standby 2G (according to manufacturer): 315 h, Standby 3G (according to manufacturer): 294 h
Operating System
Android 5.0 Lollipop
Camera
Primary Camera: 13 MPix (f/2.0, Autofocus)
Secondary Camera: 5 MPix (f/2.0, 85° wide)
Additional features
Speakers: Mono, rear, Keyboard: virtual, PSU, USB cable, Manual, Warranty information, ASUS ZenUI, Asus Tools, Omlet Chat, Splendid, Zinio, Up (Jawbone), ZenCircle, 24 Months Warranty
Weight
170 g ( = 6 oz / 0.37 pounds) ( = 0 oz / 0 pounds)
Price
499 Euro

 

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Case

The chassis construction reminds us of the familiar ZenFone 2, but the manufacturer uses a new back cover with a 3D design consisting of 500 polygonal areas instead of the smooth surface. This does indeed look very appealing, even though the effect was a bit subtle in the case of our white review unit (Illusion White). You can also get a blue (Illusion Blue) or pink model if you prefer a more noticeable finish. Despite the new pattern, however, the back cover is only made of pretty simple plastic, which can be noticed when you touch it. In general, the stability leaves a decent impression; there is only some slight creaking. 

The maximum height of 10.9 millimeters (~0.43 in) is pretty well-concealed by the rounded back cover. The thickness is even reduced to just 3.9 millimeters (~0.15 in) on the two sides, so there is no room for physical buttons. The power button is now at the top (center) and the volume rocker is located at the back. The handling of the latter cannot impress us, because it is slightly loose and creates a rather loud clicking sound. The back cover can be removed, although it requires some force. However, you only gain access to the two SIM slots (both micro) and the additional slot for microSD-cards. This means that you need not forgo a storage expansion when you use two SIM cards, but unfortunately the battery is not replaceable.

Asus uses a quad-core SoC from Intel, more specifically the Atom Z3580, with a maximum clock of 2.33 GHz. It is supported by an enormous 4 GB of RAM and files can be stored on the 128 GB internal storage. You can also expand the storage via microSD-card by up to 128 GB and compatible apps can be transferred to the microSD card after installation. At the bottom of the smartphone is a Micro-USB 2.0 port, which can be used to charge the device and synchronize files with a PC. UST-OTG is supported as well and our USB flash drive was immediately recognized via an adapter. MHL or Miracast are not available, data transfers in local networks are only possible via Chromecast. Data transfers to other mobile devices are possible via Bluetooth 4.0 and NFC.

Software

Asus ships the ZenFone 2 Deluxe with Android 5.0 and its own user interface ZenUI. The functionality is not really that different from standard Android, but there are some additional features. This does, for example, include ZenMotion, where you can accept a call by holding the smartphone to your ear. The manufacturer was pretty generous with additional software. These include some useful tools, but also unnecessary bloatware. You can see all the preloaded apps on the screenshots below. The Android buttons are implemented as sensor buttons below the display and do not occupy any space on the display, but unfortunately they are not illuminated.

Home screen
Home screen
Preloaded apps 1/4
Preloaded apps 1/4
Preloaded apps 2/4
Preloaded apps 2/4
Preloaded apps 3/4
Preloaded apps 3/4
Preloaded apps 4/4
Preloaded apps 4/4
Stagefright Detector App
Stagefright Detector App

Communication & GPS

GPS Test outdoors
GPS Test outdoors
GPS Test indoors
GPS Test indoors

Unlike many other mobile SoCs, the chip from Intel does not include a modem, so the manufacturer had to integrate an additional module. The ZenFone 2 Deluxe even gets two additional modules for the dual-SIM feature, where both cards can be used at the same time. The first SIM slot is handled by the modem XMM 6262, which supports up to LTE Cat. 4 (downstream 150 Mbps, upstream 50 Mbps). It also covers a lot of frequencies (see specifications at the beginning of the review), so you should get a signal in many parts of the world.

The second SIM slot can only be used for calls in the 2G network. The Intel XMM 2230 modem also supports Bluetooth 4.0 and the FM radio (in combination with a headset). The signal quality was inconspicuous in the metropolitan T-Mobile network.

Local wireless connections are handled by another module, which is not specified. It supports the standards 802.11 a/b/g/n/ac in 2.4 as well as 5 GHz networks. The connection with the two routers Asus RT AC56U and Fritz!Box 7490 was flawless and there were no unexpected signal losses or other issues. 

The position of the smartphone can be located via A-GPS and GLONASS. The location was not possible indoors, not even close to a window. The process only took a few seconds outdoors, but the accuracy was just 16 meters (~52 ft). Some comparison devices are much more accurate in this regard.

Telephone & Voice Quality

The Phone app is very simple and dominated by the large numbers pad. You also get access to favorites, contacts and groups. In addition, it is possible to create VIP contacts or see a history of calls from blocked contacts.

The voice quality was decent with both SIM-slots. Voices were easy to understand on both sides of the call and there were only slight distortions (quiet static) from time to time. The position of the speaker can be an issue when you use the hands-free feature, when the smartphone is lying on a table or even worse, a soft object (pillow, blanket), when the voice of the caller will be muffled.

Cameras & Multimedia

Picture main camera (click for original)
Picture main camera (click for original)
Picture front camera (click for original)
Picture front camera (click for original)

At the back of the ZenFone 2 Deluxe is a 13 MP camera (f/2.0, autofocus) that takes pictures with up to 4096x3072 pixels. The quality of the pictures is actually decent, because the colors are vivid and you can see many details. Asus also advertises the PixelMaster technology, which is supposed to ensure better results in low-light situations. The brightness is actually pretty good in these scenarios, but there is visible picture noise, so many details will be lost.

You can immediately notice the lower resolution of the front camera at 5 MP, and the pictures are also pretty dark. However, the quality is sufficient for selfies. Overall, the ZenFone 2 Deluxe offers many settings and picture modes.

Videos can be recorded in Full HD and you can also create slow motions as well as time lapses.

Image Comparison

Choose a scene and navigate within the first image. One click changes the zoom step. One click on the zoomed-in image opens the original in a new window. The first image shows the scaled photograph of the test device.

Scene 1Scene 2Scene 3

Accessories

The ZenFone 2 Deluxe comes with a modular 10-watt power adapter (5V, 2A), a USB cable, a headset, a manual as well as a warranty card. Asus also offers additional accessories on its homepage. They are primarily designed for photographers, because besides an external professional Xenon flash (Zenflash), you can also get a dual-LED flash called Lolliflash. Its shape is similar to a lollipop and it can be easily attached to the stereo jack. You can choose between different filters to improve selfies. Asus also offers special in-ears (ZenEar, ZenEar S) as well as an external battery (ZenPower).

Warranty

The warranty period is 24 months.

Input Devices & Handling

The default input is the Asus keyboard. It offers the common functions like swipe inputs and word predictions. You can also adjust the height of the keyboard to a certain extent. The capacitive touchscreen provides good gliding capabilities and executes inputs reliably and without delays. The handling was always smooth.

Keyboard landscape mode
Keyboard landscape mode
Keyboard portrait mode (default height)
Keyboard portrait mode (default height)
Keyboard portrait mode (minimum height)
Keyboard portrait mode (minimum height)
Keyboard portrait mode (maximum height)
Keyboard portrait mode (maximum height)

Display

Asus has equipped the ZenFone 2 Deluxe with a 5.5-inch IPS display. The resolution is 1920x1080 pixels, which results in a pixel density of 400 PPI. Individual pixels are therefore not visible and the subjective picture impression is very good with sharp pictures and fonts. We can measure an average luminance of almost 395 cd/m², which is comparatively low. The brightness distribution of 88% is not perfect, but there are no restrictions in practice.

The black value is pretty high at 0.5 cd/m², which is typical for an IPS display. This also means that the contrast ratio is "only" 850:1. Only the Motorola Moto X Style is even worse in the comparison, while the LG G4 and the two AMOLED based devices, the Samsung Galaxy S6 and the Huawei Mate S have an advantage.

399
cd/m²
405
cd/m²
381
cd/m²
395
cd/m²
425
cd/m²
378
cd/m²
381
cd/m²
414
cd/m²
374
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 425 cd/m² Average: 394.7 cd/m²
Brightness Distribution: 88 %
Center on Battery: 425 cd/m²
Contrast: 850:1 (Black: 0.5 cd/m²)
ΔE Color 7.05 | - Ø
ΔE Greyscale 6.38 | - Ø
Gamma: 1.63
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
Screen
19%
4%
17%
28%
Brightness395528
34%
350
-11%
536
36%
345
-13%
Brightness Distribution8892
5%
87
-1%
90
2%
89
1%
Black Level *0.50.66
-32%
0.47
6%
Contrast850815
-4%
1204
42%
Colorchecker DeltaE2000 *7.052.63
63%
4.95
30%
6.17
12%
2.51
64%
Greyscale DeltaE2000 *6.383.24
49%
6.54
-3%
6.26
2%
2.59
59%
Gamma *1.632.172.272.482.43
CCT6776 96%6906 94%6943 94%8171 80%6424 101%
Color Space (Percent of AdobeRGB 1998)65.48
Color Space (Percent of sRGB)98.63

* ... smaller is better

The ZenFone 2 Deluxe does not leave a good impression in the other measurements with the professional software CalMAN and is usually in the last place within the comparison group. The average DeltaE deviation compared to the sRGB reference color space is 7.05 for the colors and 6.38 for the grayscale. The target values would be smaller 3 in both cases. The gamma value is also too low at 1.62 (ideal: 2.2). Subjectively, we cannot see a strong blue cast, but Asus still provides a blue light filter in the quick settings that uses a slightly warmer color temperature.

CalMAN Grayscale
CalMAN Grayscale
CalMAN ColorChecker
CalMAN ColorChecker
CalMAN Saturation Sweeps
CalMAN Saturation Sweeps
CalMAN Colorspace
CalMAN Colorspace

The visibility of the glossy display is very good outdoors as long as you can avoid direct light sources. You should also activate the automatic brightness control in bright environments to benefit from the highest possible luminance. The viewing angle stability of the IPS screen is good, the contrast will only drop from extreme angles and you can see a slight gray hue.

In the sun
In the sun
Viewing angles
Viewing angles

Performance

Asus offers two versions of the ZenFone 2 Deluxe, although the availability varies based on the region. The two models differ in terms of the processor and storage capacity. While the quad-core processor (Z3580) of our review unit can reach up to 2.33 GHz, the smaller version with the Z3560 is limited to 1.8 GHz. The less powerful model also has a smaller storage capacity of 64 GB.

The general performance of our review unit is decent. Extensive multitasking benefits from the 4 GB of RAM in particular and is not a big challenge. The benchmarks show that the Atom processor (64-bit) of our review unit is usually just beaten by the Snapdragon 808 in the LG G4 and the Motorola Moto X Style, while the Exynos 7420 of the Galaxy S6 is usually out of range. The PowerVR G6430 performs better in the benchmarks and battles with the Galaxy S6 for the first place. The other comparison devices are sometimes clearly beaten.

The internal storage with a capacity of 128 GB is not one of the fastest flash modules. Many rivals are already faster in the sequential tests (read 144 MB/s, write 89 MB/s), but the performance is only sufficient for the last place in the random tests (read 20.6 MB/s, write 8.48 MB/s). It can therefore take a little longer when you copy larger files, but there should not be any limitations.

The subjective performance was sufficiently high to ensure a smooth operation all the time. Web browsing also convinces without stutters.

AnTuTu Benchmark v5 - Total Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
48592 Points ∼60%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
52279 Points ∼65% +8%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
47732 Points ∼59% -2%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
49941 Points ∼62% +3%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
60804 Points ∼75% +25%
Geekbench 3
32 Bit Multi-Core Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
2898 Points ∼18%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
2952 Points ∼18% +2%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
5073 Points ∼31% +75%
32 Bit Single-Core Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
915 Points ∼20%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1022 Points ∼22% +12%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1146 Points ∼25% +25%
64 Bit Multi-Core Score (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
3567 Points ∼18%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
3970 Points ∼21%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
3556 Points ∼18%
64 Bit Single-Core Score (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1276 Points ∼27%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
941 Points ∼20%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1107 Points ∼23%
3DMark (2013)
Sling Shot OpenGL ES 3.1 Physics (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1345 Points ∼53%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
1051 Points ∼41%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1216 Points ∼48%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1320 Points ∼52%
Sling Shot OpenGL ES 3.1 Graphics (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
440 Points ∼8%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
259 Points ∼5%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
440 Points ∼8%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1152 Points ∼21%
Sling Shot OpenGL ES 3.1 (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
517 Points ∼13%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
311 Points ∼8%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
513 Points ∼13%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1186 Points ∼31%
Sling Shot OpenGL ES 3.0 Physics (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1339 Points ∼53%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
1052 Points ∼42%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1115 Points ∼44%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1553 Points ∼62%
Sling Shot OpenGL ES 3.0 Graphics (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1419 Points ∼18%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
315 Points ∼4%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1399 Points ∼18%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1492 Points ∼19%
Sling Shot OpenGL ES 3.0 (sort by value)
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1400 Points ∼29%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
373 Points ∼8%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1324 Points ∼27%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
1505 Points ∼31%
1280x720 offscreen Ice Storm Unlimited Physics (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
21115 Points ∼33%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
12767 Points ∼20% -40%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
11671 Points ∼18% -45%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
11178 Points ∼18% -47%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
18649 Points ∼29% -12%
1280x720 offscreen Ice Storm Unlimited Graphics Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
20006 Points ∼4%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
23321 Points ∼5% +17%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
8931 Points ∼2% -55%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
23390 Points ∼5% +17%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
23193 Points ∼5% +16%
1280x720 offscreen Ice Storm Unlimited Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
20242 Points ∼11%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
19702 Points ∼11% -3%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
9423 Points ∼5% -53%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
18821 Points ∼10% -7%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
22002 Points ∼12% +9%
1920x1080 Ice Storm Extreme Physics (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
10266 Points ∼17%
1920x1080 Ice Storm Extreme Graphics (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
5319 Points ∼1%
1920x1080 Ice Storm Extreme Score (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
5957 Points ∼4%
1280x720 Ice Storm Standard Physics (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
10357 Points ∼7%
1280x720 Ice Storm Standard Graphics (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
9891 Points ∼1%
1280x720 Ice Storm Standard Score (sort by value)
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
9991 Points ∼5%
GFXBench 3.0
off screen Manhattan Offscreen OGL (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
13 fps ∼3%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
15 fps ∼4% +15%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
5.8 fps ∼2% -55%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
15 fps ∼4% +15%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
22 fps ∼6% +69%
on screen Manhattan Onscreen OGL (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
12 fps ∼16%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
9.3 fps ∼12% -22%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
6.3 fps ∼8% -47%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
9.5 fps ∼13% -21%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
16 fps ∼21% +33%
Smartbench 2012
Gaming Index (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
4378 points ∼95%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
3873 points ∼84% -12%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
4293 points ∼93% -2%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
4118 points ∼90% -6%
Productivity Index (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
3856 points ∼20%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
8815 points ∼47% +129%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
5932 points ∼32% +54%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
8940 points ∼47% +132%
BaseMark OS II
Web (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
896 Points ∼71%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
974 Points ∼77% +9%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
834 Points ∼66% -7%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
881 Points ∼70% -2%
Graphics (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
1411 Points ∼16%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1918 Points ∼22% +36%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
962 Points ∼11% -32%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1995 Points ∼23% +41%
Memory (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
1035 Points ∼39%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1776 Points ∼67% +72%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
1304 Points ∼49% +26%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1558 Points ∼58% +51%
System (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
1968 Points ∼32%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
2783 Points ∼45% +41%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
2129 Points ∼34% +8%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
2368 Points ∼38% +20%
Overall (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
1267 Points ∼39%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1743 Points ∼53% +38%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
1222 Points ∼37% -4%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
1596 Points ∼49% +26%
Linpack Android / IOS
Multi Thread (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
415.435 MFLOPS ∼14%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
589.744 MFLOPS ∼20% +42%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
282.524 MFLOPS ∼10% -32%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
506.507 MFLOPS ∼17% +22%
Single Thread (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
171.438 MFLOPS ∼17%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
415.017 MFLOPS ∼41% +142%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
129.572 MFLOPS ∼13% -24%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
361.351 MFLOPS ∼35% +111%
GFXBench (DX / GLBenchmark) 2.7
1920x1080 T-Rex HD Offscreen C24Z16 (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
30 fps ∼3%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
34 fps ∼4% +13%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
10 fps ∼1% -67%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
33.7 fps ∼4% +12%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
46 fps ∼5% +53%
T-Rex HD Onscreen C24Z16 (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
30 fps ∼50%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
24 fps ∼40% -20%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
11 fps ∼18% -63%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
24.9 fps ∼42% -17%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
30 fps ∼50% 0%
AndroBench 3
Random Write 4KB (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
8.48 MB/s ∼17%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
31.1 MB/s ∼61% +267%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
17.74 MB/s ∼35% +109%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
15 MB/s ∼29% +77%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
19.9 MB/s ∼39% +135%
Random Read 4KB (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
20.68 MB/s ∼15%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
26.97 MB/s ∼20% +30%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
27.25 MB/s ∼20% +32%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
31.5 MB/s ∼23% +52%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
80 MB/s ∼58% +287%
Sequential Write 256KB (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
89.99 MB/s ∼56%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
46.15 MB/s ∼29% -49%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
103.44 MB/s ∼65% +15%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
153 MB/s ∼96% +70%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
138.9 MB/s ∼87% +54%
Sequential Read 256KB (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
144.47 MB/s ∼30%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
246.89 MB/s ∼51% +71%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
143.96 MB/s ∼30% 0%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
251 MB/s ∼52% +74%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
319 MB/s ∼65% +121%
Sunspider - 1.0 Total Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
930.6 ms * ∼23%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 45)
773.6 ms * ∼19% +17%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash (Stock Browser Android 5.1)
1041.8 ms * ∼26% -12%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 39)
719 ms * ∼18% +23%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash (Android 5.0.2)
546 ms * ∼14% +41%
Octane V2 - Total Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
6379 Points ∼14%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 45)
8065 Points ∼18% +26%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash (Stock Browser Android 5.1)
4106 Points ∼9% -36%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Android 5.0 Lollipop Stock-Browser)
7832 (min: 6791) Points ∼17% +23%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash (Android 5.0.2)
8518 Points ∼19% +34%
Mozilla Kraken 1.1 - Total Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
6002.2 ms * ∼10%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 45)
7325 ms * ∼12% -22%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash (Stock Browser Android 5.1)
11028.7 ms * ∼19% -84%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Android 5.0 Lollipop Stock-Browser)
4770.8 ms * ∼8% +21%
JetStream 1.1 - 1.1 Total Score (sort by value)
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
36.274 Points ∼0%
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 45)
45 Points ∼0% +24%
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash (Stock Browser Android 5.1)
25.412 Points ∼0% -30%
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash (Chrome 44)
43.118 Points ∼0% +19%
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash (Chrome 44)
49.193 Points ∼0% +36%

* ... smaller is better

Games

Thanks to the good graphics performance of the PowerVR G6430, the ZenFone 2 Deluxe can also handle games very well. Even the demanding “Asphalt 8: Airborne” can be played at the highest settings, although the gameplay is only completely smooth at medium details. Simpler games like “Angry Birds 2” are therefore obviously no problem. The sensors work well, but you can quickly cover the speaker at the back with your hands.

Angry Birds 2
Angry Birds 2
Asphalt 8: Airborne
Asphalt 8: Airborne

Emissions

Temperature

The overall temperature development of the ZenFone 2 Deluxe is not critical. There are already some spots that warm up to 33 °C (~91 °F) while idling, but the average value is a comfortable 31 °C (~88 °F). The warming is primarily focused on the upper part of the device, where we can measure up to 39 °C (~102 °F) during the stress test. This is still not inconvenient and the temperatures will hardly be that high in practice.

Max. Load
 37.7 °C33.2 °C33.8 °C 
 37.9 °C35.9 °C35.2 °C 
 37 °C34.9 °C33.8 °C 
Maximum: 37.9 °C
Average: 35.5 °C
32.2 °C34.3 °C39.3 °C
31 °C32.3 °C37.4 °C
32.3 °C34 °C38.1 °C
Maximum: 39.3 °C
Average: 34.5 °C
Power Supply (max.)  33.3 °C | Room Temperature 21 °C | Voltcraft IR-350

Speakers

At the back of the smartphone is one speaker, which does a pretty good job. The maximum volume is sufficiently high and you can still listen to it when you crank it up. As expected, bass is not available, but the sound is pretty balanced. You also get the Asus AudioWizard with several profiles. A better result is possible via headphones or external speakers, which can be attached via a stereo jack or Bluetooth.

Discussion

Energy Management

Power Consumption

The power consumption of the smartphone is slightly high compared to the rivals. One possible reason is the two additional modems, which are already integrated into the SoCs of the other models, but the differences are not extreme. The power adapter has a nominal output of 10 watts and has no problems to cover the maximum consumption of the ZenFone 2 Deluxe.

Power Consumption
Off / Standbydarklight 0 / 0.1 Watt
Idledarkmidlight 1.1 / 2.2 / 2.4 Watt
Load midlight 4.2 / 7.2 Watt
 color bar
Key: min: dark, med: mid, max: light        Voltcraft VC 940
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
Power Consumption
11%
24%
-5%
35%
Idle Minimum *1.10.7
36%
0.6
45%
1.1
-0%
0.4
64%
Idle Average *2.22.2
-0%
1.2
45%
1.5
32%
0.6
73%
Idle Maximum *2.42.3
4%
1.6
33%
1.9
21%
1.2
50%
Load Average *4.23.9
7%
4.1
2%
6.6
-57%
5
-19%
Load Maximum *7.26.8
6%
7.4
-3%
8.8
-22%
6.8
6%

* ... smaller is better

Battery Runtime

Our review unit is equipped with a 3000 mAh battery (lithium-polymer) that manages a runtime of 7 hours in our Wi-Fi test, where we simulate the web browsing at an adjusted brightness of 150 cd/m². This is an average result within our comparison, because the Huawei S Mate and the Galaxy S6 have more stamina, while both the LG G4 as well as the Motorola Moto X Style have to be recharged sooner.

The ZenFone 2 Deluxe also offers different energy-saving modes to increase the runtimes. This includes the normal energy-saving mode and a super-saving mode, but it is also possible to adjust the settings manually. The smartphone supports QuickCharge and Asus even sells a special 18-watt PSU (BoostMaster) for our test model with the faster Atom processor (Z3580).

Battery Runtime
WiFi Surfing v1.3
7h 00min
Asus Zenfone 2 Deluxe ZE551ML
PowerVR G6430, Z3580, 128 GB eMMC Flash
Motorola Moto X Style
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Huawei Mate S
Mali-T628 MP4, Kirin 935, 32 GB eMMC Flash
LG G4
Adreno 418, 808 MSM8992, 32 GB eMMC Flash
Samsung Galaxy S6
Mali-T760 MP8, 7420 Octa, 32 GB UFS 2.0 Flash
Battery Runtime
-5%
37%
-22%
13%
WiFi v1.3420400
-5%
575
37%
326
-22%
475
13%
WiFi575

Pro

+ interesting design
+ dual-SIM + storage expansion via microSD
+ 4 GB RAM and 128 GB storage

Cons

- comparatively high color deviations
- battery integrated, even though the rear cover can be removed
- wobbly volume rocker at the back
- rear cover made of simple plastic
- Android buttons not illuminated

Verdict

In Review: Asus ZenFone 2 Deluxe. Test model courtesy of Asus.
In Review: Asus ZenFone 2 Deluxe. Test model courtesy of Asus.

At the beginning of the test, we raised the question whether the Asus ZenFone 2 Deluxe is a convenient package. The answer is yes, because there are no real drawbacks. But let us have a look at the positive aspects first. The highlight of the ZenFone 2 Deluxe is certainly the generous memory equipment. 4 GB of RAM and 128 GB of storage should be sufficient for the coming years. Another highlight is the dual-SIM support with the simultaneous storage expansion via microSD-card.

You have to look quite hard to find some issues. The back cover is nicely designed, but only made of simple plastic. The volume rocker of our device was wobbly and not well-integrated. The battery is fixed, even though you can remove the back cover. The display could also produce more accurate colors, but in practice, this should not be a big deal for many users.

However, none of these issues are really serious. The biggest problem is probably the average performance in many sections, because the review unit can only stand out from the competition in terms of memory capacity. However, if you like the design of the ZenFone 2 Deluxe, there is no reason why you should not buy it.

The ZenFone 2 Deluxe from Asus is a good smartphone that does not offer many highlights, but there are no serious drawbacks in any area, either.

Asus Zenfone 2 Deluxe ZE551ML - 01/04/2016 v4(old)
Andreas Osthoff

Chassis
82%
Keyboard
67 / 75 → 89%
Pointing Device
92%
Connectivity
46 / 61 → 75%
Weight
91%
Battery
90%
Display
83%
Games Performance
66 / 57 → 100%
Application Performance
52 / 65 → 80%
Temperature
88%
Noise
100%
Audio
59 / 91 → 65%
Camera
67%
Average
76%
84%
Smartphone - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Asus ZenFone 2 Deluxe ZE551ML Smartphone Review
Andreas Osthoff, 2016-01- 9 (Update: 2016-01-10)