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  1. #11
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    Quote Originally Posted by Grumpy Bob View Post
    I'm running a Pi4 with pCP 7.0 and LMS, powered by USB via my QNAP NAS rather than a Pi4 specific USB-C power supply. It's been fine for the 3-4 weeks since I set it up, despite some adverse comments in another thread! I don't have a hard drive, fan or HAT attached to this Pi (which could, I suppose, increase its power requirement).

    Robert
    Thats interesting, are you saying you power your Pi4 from only the USB connection to your QNAP NAS?

  2. #12
    Senior Member Tex's Avatar
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    Not to question what's been said

    I have a Pi 3 B and installed pCP 7 64 Bit. Then my brother had sent me
    an ifi iPower wall wart. I am amazed with the performance and stability.
    I stream a lot of things like Spotify and Digital Import and since I have installed
    pCP 7 they seem to be much more stable. I am also impressed with the power supply
    it could be illusory but it seems to help fidelity better bass etc.
    I was tempted to upgrade to the Pi 4 but have decided to continue with the Pi 3B.
    With the philosophy if it ain't broken. But I haven't had any experience with the Pi 4.
    Obviously a better CPU & more memory would be good.
    I would have never bought the ifi iPower wall wart on my own;-)
    I am also using the usb connections on the pi to power a hard drive & a dac, without any
    problem.

    https://drop.com/buy/drop-grace-desi...d-dac-balanced

    https://www.amazon.com/iPower-Supply...NDM6HXM056MGMZ
    Last edited by Tex; 2021-01-02 at 14:04.
    (1) Pi 3 w/ HifiBerry Digi + Pro, piCorePlayer 7.0.0-64 Bit
    LMS 8.2.0, WD usb drive for Music files
    (1) Touch, (1) Transporter, (1) Duet
    QLogitechMediaServer on QNAP TS-853a

  3. #13
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    Quote Originally Posted by diode84 View Post
    I am definitely getting very cold feet now. The Pi4 needs 5.1 volts and if I have a power supply, 5.1 volts, say at 10 amps with the correct plug on it to
    go into the Pi, is that a problem to a Pi4. I am used to using stabilised power supplies and as long as they give out more current than the Pi needs maximum
    then that is OK.
    Is there something special in Pi PSUs like Dell use an extra lead for identification.
    It looks like it is only e-marked cables that cause issues (whatever they are).

    Sent from my Pixel 3a using Tapatalk

  4. #14
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    Quote Originally Posted by slartibartfast View Post
    It looks like it is only e-marked cables that cause issues (whatever they are).

    Sent from my Pixel 3a using Tapatalk
    No idea what an e-marked cable is. To me a cable to zero volts and one to +5 volts of sufficient current is all you could need.

  5. #15
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    Quote Originally Posted by Tex View Post
    Obviously a better CPU & more memory would be good.
    Interested why you feel you need more memory and better CPU. Is Pi3b+ lacking.

  6. #16
    In my experience, a Pi3B works fine as an LMS server when running pCP as its OS. I didn't see a massive improvement in scanning speed when I replaced a Pi3B with a Pi4B.

    Robert
    Home: Raspberry Pi 4/pCP7.0/LMS8.1.2/Material with files on QNAP TS-251A
    Touch > DacMagic 100 > Naim Audio Nait 3 > Mission 752 (plus Rega Planar 3 > Rega Fono Mini; Naim CD3)
    2 x Squeezebox Radios, 1 X Squeezebox 3 (retired), 1 x SqueezeAMP
    Office: LMS8.0.0 running on Raspberry Pi3; Raspberry Pi 3 player with touchscreen/piCorePlayer/IQaudIO DAC and Amp
    Portable: Raspberry Pi 3B/pCP7.0.1/LMS8.1.2/Material, files on Seagate portable drive, powered via power brick

  7. #17
    Senior Member Tex's Avatar
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    Bigger is better;-)

    No & that is why I posted. I would've installed a 32 bit system if I had thought about it.
    But so far no memory problems with the 64 bit. As I understand it 64 bit takes up more of the
    available memory. Response time seems a bit snappier but more importantly no lag.
    I use it primarily for a server but also use the hifiberry digital output and no problems.
    So I said "more memory & a faster CPU" with the idea you always want more memory & a faster processor for
    better performance but in this case, I am very happy. & I am willing to concede that the ifi iPower
    wall wart is an improvement, though I couldn't prove it except by subjective judgement. Using
    the standard switching power supply was more than adequate.
    Last edited by Tex; 2021-01-02 at 13:55.
    (1) Pi 3 w/ HifiBerry Digi + Pro, piCorePlayer 7.0.0-64 Bit
    LMS 8.2.0, WD usb drive for Music files
    (1) Touch, (1) Transporter, (1) Duet
    QLogitechMediaServer on QNAP TS-853a

  8. #18
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    Quote Originally Posted by diode84 View Post
    No idea what an e-marked cable is. To me a cable to zero volts and one to +5 volts of sufficient current is all you could need.
    Google is your friend

    https://satechi.net/blogs/news/ident...-e-mark-cables

    Just get a rpi4b and the official power supply

    https://shop.pimoroni.com/products/r...29157000085587

    It's a lot of fuss, about not a lot

    ronnie

  9. #19
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    The difference between the 3b and 4 which arguably makes the latter a better bet as a server is the change from shared bus 100mbs LAN/USB 2 on 3b to separate Gb LAN and USB2 & 3 on Pi4.
    Yes the Pi4 runs a bit warmer and yes early models had power supply issues but.
    VB2.4 storage QNAP TS419p (NFS)
    Living Room Joggler & Pi4/Khadas -> Onkyo TXNR686 -> Celestion F20s
    Office Joggler & Pi3 -> Denon RCD N8 -> Celestion F10s
    Dining Room SB Boom
    Kitchen UE Radio (upgraded to SB Radio)
    Bedroom (Bedside) Pi Zero+DAC ->ToppingTP21 ->AKG Headphones
    Bedroom (TV) & Bathroom SB Touch ->Denon AVR ->Mordaunt Short M10s + Kef ceiling speakers
    Guest Room Joggler > Topping Amp -> Wharfedale Modus Cubes
    Everything controlled by iPeng & Material on iOS

  10. #20
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    Quote Originally Posted by d6jg View Post
    The difference between the 3b and 4 which arguably makes the latter a better bet as a server is the change from shared bus 100mbs LAN/USB 2 on 3b to separate Gb LAN and USB2 & 3 on Pi4.
    Yes the Pi4 runs a bit warmer and yes early models had power supply issues but.
    Does the shared bus cause noise problems?

    I don't have any problem supplying a Pi4 with more than adequate 5.1 volts stabilised power supply without using a wall plug type that I have never been keen on.

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