Breve Análise do Portátil Lenovo Flex 11 Chromebook

Name: Lenovo Flex 11 Chromebook
Brand: Lenovo

Utilitarismo de barebones… Um ponto verdadeiramente brilhante para os Chromebooks tem sido o setor educacional, onde sua adoção foi desproporcionalmente alta. Em reconhecimento a esta oportunidade, a Lenovo aproveita o momento com o que discutivelmente seria o seu portátil mais utilitário - ainda assim acessível - até à data, especificamente destinado aos estudantes.

Steve Schardein (traduzido por Ricardo Soto), Published 07/04/2017 🇺🇸 🇩🇪 ...

Chromebook ARM Touchscreen Convertible / 2-in-1

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Lenovo Flex 11 Chromebook

Processador

Mediatek MT8173C 4 x 2.1 GHz, Cortex-A72/-A53

Placa gráfica

PowerVR GX6250

Memória

4 GB

, LPDDR3

Pantalha

11.60 polegadas 16:9, 1366 x 768 pixel 135 PPI, Multitouch de 10 pontos, IPS, Brilhante: sim

Disco rígido

32 GB eMMC Flash, 32 GB

Conexões

2 USB 3.0, 1 HDMI, 1 Kensington Lock, Conexões Audio: 3,5 mm Audio-Kombo, Card Reader: SD/MMC

Funcionamento em rede

Wireless LAN 802.11 a/g/n/ac (a/g/n = Wi-Fi 4/ac = Wi-Fi 5/), Bluetooth 4.2

Tamanho

altura x largura x profundidade (em mm): 21 x 299 x 208

Bateria

45 Wh Lítio-Polímero, 3-células, interna

Sistema Operativo

Google Chrome OS

Camera

Webcam: 720p HD Fixfokus
Primary Camera: 1 MPix

Características adicionais

Alto falantes: 2.0, Teclado: spritzwassergeschützter Chiclet-Typ, Iluminação do Teclado: não, 12 Meses Garantia, fanless, ruggedized

peso

1.35 kg, Suprimento de energia: 266 g

Links

Lenovo página inicial
Lenovo Seção de notebook

Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

see all specifications

Lenovo ThinkPad 13 Chromebook Acer Chromebook R13 CB5-312T-K0YK Lenovo Flex 11 Chromebook Asus Transformer Book T100HA-C4-GR Lenovo IdeaPad MIIX 310-10ICR DIN A4 ❌

Left: USB Type-C (charging) port, HDMI, USB 3.0 Type-A (conventional) port, SD card reader

Right: Combo audio jack, volume rocker, power button, Kensington Lock port

SD Card Reader - average JPG Copy Test (av. of 3 runs)
Lenovo ThinkPad 13 Chromebook	50.9 MB/s +536%
Lenovo IdeaPad MIIX 310-10ICR	41.21 MB/s +415%
Lenovo Flex 11 Chromebook	8 MB/s


254.9 cd/m²	243.8 cd/m²	234.6 cd/m²
263.9 cd/m²	275.1 cd/m²	244.2 cd/m²
261.7 cd/m²	273.7 cd/m²	241.1 cd/m²

Distribuição do brilho

tested with X-Rite i1Pro Basic 2

Máximo: 275.1 cd/m² (Nits) Médio: 254.8 cd/m²
iluminação: 85 %
iluminação com acumulador: 275.1 cd/m²
Contraste: 887:1 (Preto: 0.31 cd/m²)
ΔE Color 5.2 | 0.5-29.43 Ø4.92
ΔE Greyscale 2.8 | 0.5-98 Ø5.2
Gamma: 2.28

	Lenovo Flex 11 Chromebook IPS, 11.6", 1366x768	Asus Transformer Book T100HA-C4-GR AUO20D4, IPS, 10.1", 1280x800	Lenovo ThinkPad 13 Chromebook IPS, 13.3", 1920x1080	Acer Chromebook R13 CB5-312T-K0YK IPS, 13.3", 1920x1080	Lenovo IdeaPad MIIX 310-10ICR IPS, 10.1", 1280x800
Display
Display P3 Coverage		52.8			51.1
sRGB Coverage		73			75.2
AdobeRGB 1998 Coverage		53.3			52.7
Response Times			-21%	3%	-28%
Response Time Grey 50% / Grey 80% *	33.6 ?(18.8, 14.8)		37.6 ?(15.2, 22.4) -12%	38 ?(14, 24) -13%	31.6 ?(13.6, 18) 6%
Response Time Black / White *	28 ?(16.4, 11.6)		36 ?(5.2, 30.8) -29%	23 ?(5, 18) 18%	24.8 ?(6, 28.8) 11%
PWM Frequency	20830 ?(99)				69.4 -100%
Screen		36%	-15%	-12%	-22%
Brightness middle	275.1	480.2 75%	262.9 -4%	192 -30%	251.9 -8%
Brightness	255	455 78%	261 2%	204 -20%	233 -9%
Brightness Distribution	85	85 0%	92 8%	88 4%	83 -2%
Black Level *	0.31	0.324 -5%	0.601 -94%	0.23 26%	0.348 -12%
Contrast	887	1482 67%	437 -51%	835 -6%	724 -18%
Colorchecker dE 2000 *	5.2	3.45 34%	4.87 6%		6.35 -22%
Colorchecker dE 2000 max. *	20.3		12.18 40%		11.15 45%
Greyscale dE 2000 *	2.8	2.67 5%	3.51 -25%	3.99 -43%	7.09 -153%
Gamma	2.28 ^96%	2.34 ^94%	2.17 ^101%	2.45 ^90%	2.02 ^109%
CCT	6861 ^95%	6164 ^105%	6476 ^100%	6380 ^102%	8590 ^76%
Color Space (Percent of AdobeRGB 1998)		47.28			52.69
Color Space (Percent of sRGB)		84.38
Total Average (Program / Settings)		36% / 36%	-18% / -16%	-5% / -8%	-25% / -24%

* ... 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
28 ms ... rise ↗ and fall ↘ combined	↗ 16.4 ms rise
28 ms ... rise ↗ and fall ↘ combined	↘ 11.6 ms fall
The screen shows relatively slow response rates in our tests and may be too slow for gamers. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 68 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (21 ms).
↔ Response Time 50% Grey to 80% Grey
33.6 ms ... rise ↗ and fall ↘ combined	↗ 18.8 ms rise
33.6 ms ... rise ↗ and fall ↘ combined	↘ 14.8 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.165 (minimum) to 636 (maximum) ms. » 41 % of all devices are better. This means that the measured response time is similar to the average of all tested devices (32.9 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

20830 Hz

≤ 99 % brightness setting

The display backlight flickers at 20830 Hz (worst case, e.g., utilizing PWM) Flickering detected at a brightness setting of 99 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 20830 Hz is quite high, so most users sensitive to PWM should not notice any flickering.

In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8743 (minimum: 5 - maximum: 343500) Hz was measured.

Sunspider | JetStream 1.1 | Mozilla Kraken 1.1 | Octane V2 | WebXPRT 2015

Sunspider - 1.0 Total Score (sort by value)
Lenovo Flex 11 Chromebook PowerVR GX6250, MT8173C, 32 GB eMMC Flash	590 ms *
Asus Transformer Book T100HA-C4-GR HD Graphics (Cherry Trail), Z8500, Samsung CGND3R eMMC	399.8 ms * +32%
Lenovo ThinkPad 13 Chromebook HD Graphics 520, 6300U, 32 GB eMMC Flash	213 ms * +64%
Acer Chromebook R13 CB5-312T-K0YK PowerVR GX6250, MT8173C, 32 GB eMMC Flash	578 ms * +2%

JetStream 1.1 - Total Score (sort by value)
Lenovo Flex 11 Chromebook PowerVR GX6250, MT8173C, 32 GB eMMC Flash	57.1 Points
Lenovo ThinkPad 13 Chromebook HD Graphics 520, 6300U, 32 GB eMMC Flash	173.3 Points +204%
Acer Chromebook R13 CB5-312T-K0YK PowerVR GX6250, MT8173C, 32 GB eMMC Flash	57 Points 0%

Mozilla Kraken 1.1 - Total (sort by value)
Lenovo Flex 11 Chromebook PowerVR GX6250, MT8173C, 32 GB eMMC Flash	2976 ms *
Asus Transformer Book T100HA-C4-GR HD Graphics (Cherry Trail), Z8500, Samsung CGND3R eMMC	5142 ms * -73%
Lenovo ThinkPad 13 Chromebook HD Graphics 520, 6300U, 32 GB eMMC Flash	1007 ms * +66%
Acer Chromebook R13 CB5-312T-K0YK PowerVR GX6250, MT8173C, 32 GB eMMC Flash	3297 ms * -11%
Lenovo IdeaPad MIIX 310-10ICR HD Graphics (Cherry Trail), Z8350, 64 GB eMMC Flash	6122 ms * -106%

Octane V2 - Total Score (sort by value)
Lenovo Flex 11 Chromebook PowerVR GX6250, MT8173C, 32 GB eMMC Flash	10319 Points
Lenovo ThinkPad 13 Chromebook HD Graphics 520, 6300U, 32 GB eMMC Flash	29435 Points +185%
Acer Chromebook R13 CB5-312T-K0YK PowerVR GX6250, MT8173C, 32 GB eMMC Flash	10139 Points -2%
Lenovo IdeaPad MIIX 310-10ICR HD Graphics (Cherry Trail), Z8350, 64 GB eMMC Flash	6343 Points -39%

WebXPRT 2015 - Overall (sort by value)
Lenovo Flex 11 Chromebook PowerVR GX6250, MT8173C, 32 GB eMMC Flash	142 Points
Lenovo ThinkPad 13 Chromebook HD Graphics 520, 6300U, 32 GB eMMC Flash	359 Points +153%
Acer Chromebook R13 CB5-312T-K0YK PowerVR GX6250, MT8173C, 32 GB eMMC Flash	138 Points -3%

* ... smaller is better

Carga Máxima

Inatividade


33 °C	32 °C	29.8 °C
32.2 °C	31.6 °C	29.4 °C
27.2 °C	28 °C	28.4 °C

Máximo: 33 °C
Médio: 30.2 °C


30 °C	33.8 °C	36 °C
29.6 °C	33.6 °C	33.4 °C
27.6 °C	28.4 °C	27.8 °C

Máximo: 36 °C
Médio: 31.1 °C

alimentação elétrica 30 °C | Temperatura do quarto 20 °C | Fluke 62 Mini IR Thermometer

(+) The average temperature for the upper side under maximal load is 30.2 °C / 86 F, compared to the average of 30.8 °C / 87 F for the devices in the class Subnotebook.
(+) The maximum temperature on the upper side is 33 °C / 91 F, compared to the average of 35.9 °C / 97 F, ranging from 21.4 to 59 °C for the class Subnotebook.
(+) The bottom heats up to a maximum of 36 °C / 97 F, compared to the average of 39.4 °C / 103 F
(+) In idle usage, the average temperature for the upper side is 23.2 °C / 74 F, compared to the device average of 30.8 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 28.4 °C / 83.1 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28.3 °C / 82.9 F (-0.1 °C / -0.2 F).

Lenovo Flex 11 Chromebook audio analysis

(+) | speakers can play relatively loud (83 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 29.1% lower than median
(±) | linearity of bass is average (11.6% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 3.9% away from median
(±) | linearity of mids is average (8.7% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 4.1% away from median
(±) | linearity of highs is average (10.2% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (24.5% difference to median)
Compared to same class
» 81% of all tested devices in this class were better, 4% similar, 15% worse
» The best had a delta of 5%, average was 19%, worst was 53%
Compared to all devices tested
» 71% of all tested devices were better, 6% similar, 23% worse
» The best had a delta of 4%, average was 25%, worst was 134%

Acer Chromebook R13 CB5-312T-K0YK audio analysis

(±) | speaker loudness is average but good (73 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 13.2% lower than median
(+) | bass is linear (5.6% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 3.2% away from median
(+) | mids are linear (6.9% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.5% away from median
(+) | highs are linear (5.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (13.9% difference to median)
Compared to same class
» 0% of all tested devices in this class were better, 14% similar, 86% worse
» The best had a delta of 14%, average was 25%, worst was 35%
Compared to all devices tested
» 14% of all tested devices were better, 4% similar, 83% worse
» The best had a delta of 4%, average was 25%, worst was 134%

Consumo de energia

desligado	0.3 / 1.3 Watt
Ocioso	1.5 / 5.4 / 5.5 Watt
Carga	6.3 / 7.9 Watt


Key: min: , med: , max: Metrahit Energy

	Lenovo Flex 11 Chromebook MT8173C, PowerVR GX6250, 32 GB eMMC Flash, IPS, 1366x768, 11.6"	Lenovo ThinkPad 13 Chromebook 6300U, HD Graphics 520, 32 GB eMMC Flash, IPS, 1920x1080, 13.3"	Acer Chromebook R13 CB5-312T-K0YK MT8173C, PowerVR GX6250, 32 GB eMMC Flash, IPS, 1920x1080, 13.3"	Lenovo IdeaPad MIIX 310-10ICR Z8350, HD Graphics (Cherry Trail), 64 GB eMMC Flash, IPS, 1280x800, 10.1"
Power Consumption		-11%	-65%	-102%
Idle Minimum *	1.5	0.77 49%	3.8 -153%	5.14 -243%
Idle Average *	5.4	5.11 5%	6.2 -15%	7.6 -41%
Idle Maximum *	5.5	5.88 -7%	6.6 -20%	8.28 -51%
Load Average *	6.3	7.43 -18%	11 -75%	11.33 -80%
Load Maximum *	7.9	14.73 -86%	12.7 -61%	15.36 -94%

* ... smaller is better

Tempo de Execução da Bateria


WiFi Websurfing		12h 44min

	Lenovo Flex 11 Chromebook MT8173C, PowerVR GX6250, 45 Wh	Asus Transformer Book T100HA-C4-GR Z8500, HD Graphics (Cherry Trail), 30 Wh	Lenovo ThinkPad 13 Chromebook 6300U, HD Graphics 520, 42 Wh	Acer Chromebook R13 CB5-312T-K0YK MT8173C, PowerVR GX6250, 53.9 Wh	Lenovo IdeaPad MIIX 310-10ICR Z8350, HD Graphics (Cherry Trail), 33 Wh
Battery Runtime		-29%	-30%	1%	-16%
WiFi v1.3	764	541 -29%	536 -30%	773 1%	643 -16%
Reader / Idle		1460	1249
Load		246	170

Pro

+ Extremamente acessível

+ Relativamente durável, apesar da carcaça de plástico

+ Design resistente a respingos

+ Longa duração da bateria

+ Tela táctil IPS

+ Silencioso

Contra

- O teclado é superficial com um senso ambíguo de feedback

- Os botões integrados do touchpad estão abaixo dos padrões

- Massivo e pesado para uma máquina de 11,6 polegadas

- Seleção limitada de portas

- Pouco atraente

- O Chrome OS continua limitado em comparação com seus rivais

In review: Lenovo Flex 11 Chromebook. Test model provided by Lenovo US

A Lenovo tirou as luvas na luta pelo mercado educacional com a introdução do Chromebook Flex 11. Sob seu preço ultra acessível de $279, estão quase todas as principais características esperadas de um concorrente para essa coroa sedutora. É construído a partir de um plástico ABS/policarbonato barato (e absolutamente não elegante) que promete de durabilidade e está envolvido com um para-choques de borracha que o ajuda a resistir ao dano causado por pequenas gotas. Tem um teclado antideslizante e touchpad com um design especial para canalizar água longe dos equipamentos internos do dispositivo. É relativamente rápido graças aos requisitos leves do Chrome OS, mas gerencia simultaneamente longas durações da bateria graças à eficiência do grandePEQUENO SoC e sua grande bateria. Além disso, a tela é realmente bastante decente (apesar de sua resolução lamentável) e também é táctil.

O Chromebook Flex 11 não lança nenhum soco na sua tentativa de assumir o mercado educacional, cobrindo quase todas as bases: desempenho ágil e confiável, construção durável, longas durações de bateria e um preço acessível. No entanto, seus dispositivos de entrada e conectividade deixam muito a desejar, e sua aparência não é o seu forte.

É claro que com menos de $300, inevitavelmente ainda há compromissos sérios em jogo. Para começar- e sabemos que você está ficando cansado de ouvir isso, mas deve ser apontado - o Chrome OS está longe de ser o sistema operacional altamente compatível e altamente capaz que o Windows é. O suporte para aplicativos Android está quase aqui, mas mesmo considerando isso, este não é um PC completo. Além disso, os dispositivos de entrada são medíocres na melhor das hipóteses, com o teclado com deslocamentos curtos e resposta inarticulada, e os botões integrados do touchpad, perto do final da lista dos que avaliamos recentemente. É também uma máquina bastante pesada e volumosa para o seu tamanho de tela de 11,6 polegadas, mas supomos que a maioria das crianças poderia viver com essa limitação. Finalmente, a conectividade é incrivelmente básica, com apenas duas portas USB (uma das quais - a porta Type-C - também funciona como a porta de carregamento) e uma porta HDMI para conexões de acessórios e vídeo.

Em geral, no contexto do seu preço, o Flex 11 é uma recomendação fácil para quem pode lidar com a pequena lista de inconvenientes. Não há nada extravagante nem impressionante sobre isso, mas é difícil de zombar do pacote total, dado o valor do dinheiro.

Lenovo Flex 11 Chromebook - 06/26/2017 v6 ^(old)
Steve Schardein

Acabamento

61 / 98 → 62%

Teclado

64%

Mouse

80%

Conectividade

39 / 80 → 49%

Peso

71 / 35-78 → 84%

Bateria