Raspberry PI 3 - Review and differences with previous models

As said a couple of days ago in This previous article Raspberry PI 3 It has come on the market, increasing between a 50 and a 60 percent performance respect to his predecessor, but with some modest improvements in hardware.

In this new model, the chip has been replaced BCM 2836 ARMv7 Cortex at 900 MHz by the BCM 2837, ARMv8 Cortex-A53 quad-core processor of 64 bit 1, 2 GHz; but it should be noted that he keeps the bus shared between ports USB and its controller Ethernet 10/100, the major bottleneck of this micro computer.

BCM2837

Chip BCM2837 ARMv8 Cortex-A53 of 64 bit, and RAM memory.

However the guys from the Foundation have resumed one of his unfinished business, and approved with note thanks to the integrated chip BCM43438 that it gives wireless connectivity WiFi 802. 11n and Bluetooth 4.1, keep as usual the software compatibility and the distribution of the GPIO pins for with the previous versions.

Integrated chip BCM43438 Wifi 802. 11n and Bluetooth 4.1

Small antenna Wifi 802. 11n and Bluetooth 4.1

This backward compatibility allows us to migrate our projects based on previous models simply changing the microSD card device after upgrade your system in our previous model of Raspberry PI; also in this version the player has replaced and the card already is not removed by pressing it but by using friction to avoid extractions accidental if one tries it while it is switched on, What is welcome given the dire consequences.

Raspberry PI microSD card reader 2/b/B + / A/A +.

New Raspberry PI microSD card reader 3.

As expected, Fixed bug caused by extreme photosensitivity of the chip U16 SMPS improving your insulation, so we can photograph calmly our Raspberry PI 3 cameras fitted with xenon flash without fear of that is left hanging as to Raspberry Pi 2.

New chip U16 SMPS properly insulated.

This new model has a maximum power consumption of 2,5 Amp for what is more and more present the need for specific transformers, or even laboratory supplies, being already insufficient the 500mA It offers most of the ports USB conventional high-performance tasks.

By regulating the voltage and intensity of 3A 5.3V 3A at 12V

As I did in the previous review on Raspberry PI 2, I have executed the benchmark of Roy Longbottom and then you can see the comparison table on the previous models which I have prepared for the occasion.

Raspberry PI B Raspberry PI B + Raspberry PI 2 Raspberry PI 3
CPU
ARMv6 700 Mhz ARMv6 700 Mhz ARMv7 cortex QuadCore 900 MHz ARMv8 quad core 1.2 GHz cortex
GPU VideoCore IV Dual Core 250MHz VideoCore IV Dual Core 250MHz VideoCore IV Dual Core 250MHz VideoCore IV Dual Core 400MHz
RAM
512MB 512MB 1024MB (1GB) 1024MB (1GB)
Ethernet/WiFi Ethernet 10/100 Ethernet 10/100 Ethernet 10/100 Ethernet 10/100 – WiFi 802.11 b/g/n
Power 5In 1A 5In 1A 5In (2A) 5.1In 2.5 and
Minimum temperature
33.6° C
31.5° C 34.2° C 33.1° C
Maximum temperature
50.8° C 50.8° C 50.8° C 48.7° C
Read rate
10.46 MB/s 10.03 MB/s 10.46 MB/s 10.46 MB/s
Rate of writing
3.34 MB/s 3.34 MB/s 3.34 MB/s 3.34 MB/s
Upload speed
2.21 MB/s 2.21 MB/s 2.21 MB/s 2.21 MB/s
Down speed 2.84 MB/s 2.84 MB/s 2.84 MB/s 2.84 MB/s
Mflops
45.43 45.19 119.79 180.00
VAX Mips
855.06 851.07 1536.95 2469.38
Test of glazesality
Exceeded Exceeded Exceeded Exceeded

Additionally I have just two test of speed with another tool developed in Python, one connected through cable and another by WiFi; below you can see the results, first with Ethernet, and then through WiFi.

usuario@maquina:~$ ./speedtest-cli
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from Telefonica De Espana (**.**.***.**)...
Selecting best server based on latency...
Hosted by CSUC (Barcelona) [20.94 km]: 20.25 ms
Testing download speed........................................
Download: 92.34 Mbit/s
Testing upload speed..................................................
Upload: 30.83 Mbit/s
usuario@maquina:~$ ./speedtest-cli
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from Telefonica De Espana (**.**.***.**)...
Selecting best server based on latency...
Hosted by CSUC (Barcelona) [20.94 km]: 306.977 ms
Testing download speed........................................
Download: 3.70 Mbit/s
Testing upload speed..................................................
Upload: 3.41 Mbit/s

The logs the results of the test are so extensive that in the previous review I do not incrustaré them as code in the blog, but that I am going to share with you four compressed files; one for each model of Raspberry PI with the logs of all the tests performed.

Raspberry PI B Raspberry PI B + Raspberry PI 2 Raspberry PI 3

If you're Analyst or developer of the sector, Reviewer, or use Raspberry PI as an alternative to the Desktop ordrenador and want to reduce the number of cables, don't you want to be yours; But if you are on the other hand enthusiast or student and use it as a trainer plate, unless you have to buy another for any reason I do not recommend replacing your Raspberry PI 2 by this new model since that there are too many relevant changes, and still missing some aspects to Polish as the overheating detected after several hours consecutive use, and the limited use of the new architecture of 64 bit.

Photograph of Raspberry PI with a thermal camera (HWlibre.com)

Photograph of Raspberry PI 3 taken with a thermal camera [www.hwlibre.com]

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3 thoughts on"Raspberry PI 3 - Review and differences with previous models

  1. Hello good day,

    Makes a time perform the project of light, turn off and do both functions, limiting the time, in all models, it works perfectly, Today try to use the new IP 3 and it does not work when I put the SD card from one to the other, You can tell me please where this error, Thanks in advance, Super your job

    Ignacio from Belgium

  2. Hello, Good morning,

    Thanks for answering so fast, It is a pleasure to share your kindness.

    I happens something that not achieving understanding, I have a raspberry pi 3, If you install with Berryboot works well and I connect via WiFi, but not managed to install the program to light a bulb, If instead it install as if outside a pi 2, the program goes well but I cannot find the way that works on WiFi.

    If I can clarify will be super, in advance, Thank you

    Ignacio

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