[chbot] Playing with a Pi 400.

Mike Field hamster at snap.net.nz
Sun Jan 24 10:22:07 GMT 2021

The Pi's user experience is very basic. It doesn't feel that snappy, but 
browsers work fine. This is most likely due to having a pretty basic 
video GPU.

Currently I'm working on a drum machine as a micro-controller project, 
and have a proof of concept C program running on Linux.

"touch *.c; time make drummer" takes 0.47s on my i5-1035G1 laptop. It 
takes 0.53s on the Raspberry Pi 400.

Rendering around 5 minutes of drum loops (a 55MB WAV file) takes 1.79s 
on the laptop and 1.89s on the Pi.

So for none-demanding programming the performance is very close to a 
$1,500 laptop, (except the Pi400 has only 4GB, not 8GB RAM). Not bad for 
under NZ$200 for Pi400+SSD.


On 24/01/2021 10:26 pm, Andrew Starr wrote:
> Hi Richard,
> So you're happy with the RPi4 as your daily use machine? I'm seriously 
> considering this to replace my aging i3 All-in-one. I assume you went 
> with the 8Gb version?
> Anyone else's experience (Mike?) with the RPi4 as a daily use desktop 
> replacement also welcome.
> Cheers
> Andrew
> On 21/01/21 2:33 pm, Richard Jones wrote:
>> I use RPi 4 with dual monitors as my main desktop machine daily. I 
>> use a Samsung Portable SSD T5 500GB, bought from PBtech just about as 
>> soon as RPi4 came out. The  was possibly not the cheapest solution 
>> but hardware wise its plug and play and readily available. I reckoned 
>> that if I ever needed more space then SSD's would have reduced in 
>> price. Creating and enabling a swap partition prevents the pi locking 
>> up when Firefox or Chromium have too many active tabs. The SSD is 
>> just used as my home drive as USB booting from SSD arrived after I 
>> had my setup all working. Let me know if you would like some 
>> measurements done.
>> Looking at the PBTech web site it looks as though the T5 has been 
>> replaced by T7.
>> I moved to Pi after blowing up my laptop motherboard using a new 
>> chinese usb supply on a usb connected arduino nano. The supply was 
>> well designed but was manufactured with a sticky foam pad bridging 
>> the safety barrier. Consequently I bought a new laptop motherboard, 
>> rpi, and a HV insulation tester! If I'm ever daft enough to repeat 
>> the mistake I'm hoping to just replace the Pi.
>> HTH
>> Richard Jones
>> On Thu, Jan 21, 2021 at 8:49 AM Quentin McDonald 
>> <dqmcdonald at gmail.com <mailto:dqmcdonald at gmail.com>> wrote:
>>     Hi Mike,
>>     Would you mind letting us know what SSD you ended up getting and
>>     from where? I've looked into this briefly and I couldn't seem to
>>     figure out how to find one of the Pi compatible ones known to work.
>>     Thanks,
>>     Quentin
>>     On Wed, Jan 20, 2021 at 5:14 PM hamster <hamster at snap.net.nz
>>     <mailto:hamster at snap.net.nz>> wrote:
>>         Just saw an article on reverse engineering of vaccines that
>>         may be of interest some here.
>>         https://berthub.eu/articles/posts/reverse-engineering-source-code-of-the-biontech-pfizer-vaccine/
>>         <https://berthub.eu/articles/posts/reverse-engineering-source-code-of-the-biontech-pfizer-vaccine/>
>>         And for something more aligned to the list, I replaced my
>>         Windows Laptop after I discovered my Raspberry Pi 400
>>         compiled the same C source in ~40% of the time. So I went to
>>         the New Years sales and $1100 later the Raspberry Pi is still
>>         quicker.
>>         To reward it for its efforts I now have the Pi booting from a
>>         $69 USB3 SSD rather than usual uSD card. It now reads disk at
>>         300MB/s.
>>         It is much more capable than expected.
>>         Mike
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