Feathercoin daemon and wallet production version 0.18.1
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[Guide] Homebrew powered risers.


  • | Tip Max.Wyght

    [s]nutnut, will you update your guide with how to add eathing to the risers?[/s]

    edit:
    So after my serious brain fart and meltdown, I figured out the right sentence structure;
    Nutnut, will you be updating your guide with how to add grounding to the home-made risers?


  • Regular Member | Tip sheepson

    I’ve order some ‘normal’ risers so i am going to read this topic carefully soon!

    Added the guide to:
    [url=http://forum.feathercoin.com/index.php/topic,685]http://forum.feathercoin.com/index.php/topic,685[/url]


  • Moderators | Tip wrapper

    Any chance this could be compressed into one page, I’ll edit into the pinned guide in mining, if required?

    I found it confusing what was decided safe at the end. Possibly room for someone to do a Youtube / Blue Peter “video how to”.

    I just use a riser, but I like to see steam punk solutions.


  • | Tip lbr

    Anyone has any objections to the following -

    Ideal riser should be

    0*) PCIEx16 -> PCIEx1, cause mining does not require bandwidth and x1 link theoretically puts lower strain on the mg chipset/CPU.
    Tho some motherboards will require presence shorting if x1 risers are used in x16 slots.

    1. “cut” - to prevent current flow from/to motherboard voltage regulatorsPSU and to enable use of multiple PSUs

    2. have thick enough wires on +12v lines, so they won’t burn, but not thick enough to cause significant voltage drop

    3. all +12v lines shorted on the riser - to not overcurrent one pin only

    4. wires soldered directly to slot

    5*) +5v/+3v lines also going to PSU --> “ideally”

    1. capacitors on +12vground, closer to load - better, HF fast capacitors, tantalum(?), solid(?), rating(?)

    2. ground line also soldered and connected to PSU

    Ideal multi-PSU

    1. different PSUs +12v rails separated from each other
    2. different PSUs +5/+3 rails separated from each other
      3*) same PSU rails not mixing with each other
    3. Properly synced - aka turning on/off at the same time

    * does not really matter or not in the scope of the subject


  • Regular Member | Tip ghostlander

    [quote]6) capacitors on +12vground, closer to load - better, HF fast capacitors, tantalum(?), solid(?), rating(?)[/quote]

    As for solid electrolytes, you want some radial ones probably. Nippon Chemi-Con PSC 270uF/16V (diameter 8mm) are a good choice. PSA or PS are older models with a little bit higher ESR. If you can get and fit Nippon PSC 470uF/16V (diameter 10mm), that’s even better. Sanyo solid electrolytes are more expensive usually unless you’re salvaging them from broken equipment.


  • | Tip lbr

    [quote name=“ghostlander” post=“47275” timestamp=“1387875839”]
    [quote]6) capacitors on +12vground, closer to load - better, HF fast capacitors, tantalum(?), solid(?), rating(?)[/quote]

    As for solid electrolytes, you want some radial ones probably. Nippon Chemi-Con PSC 270uF/16V (diameter 8mm) are a good choice. PSA or PS are older models with a little bit higher ESR. If you can get and fit Nippon PSC 470uF/16V (diameter 10mm), that’s even better. Sanyo solid electrolytes are more expensive usually unless you’re salvaging them from broken equipment.
    [/quote]

    Thanks, I have a batch of Sanyo OS-CON, will use them.


  • | Tip mirrax

    [quote name=“wrapper0feather” post=“45855” timestamp=“1387380800”]
    Any chance this could be compressed into one page, I’ll edit into the pinned guide in mining, if required?

    I found it confusing what was decided safe at the end. Possibly room for someone to do a Youtube / Blue Peter “video how to”.

    I just use a riser, but I like to see steam punk solutions.
    [/quote]
    +1
    Do this, this, this, end.
    No opinions 🙂


  • | Tip lbr

    [url=http://www.kitguru.net/components/power-supplies/zardon/silverstone-strider-gold-1200w-psu-review-sst-st1200-g/2/]http://www.kitguru.net/components/power-supplies/zardon/silverstone-strider-gold-1200w-psu-review-sst-st1200-g/2/[/url]
    [img]http://www.kitguru.net/wp-content/uploads/2011/06/cables.png[/img]


  • | Tip jti8899

    nutnut, rep for the post as it saved me a bunch of$$ on risers and I believe will end me with a better quality rig.

    Suggestion for the next info post would be wiring of dual PS on a 4 card rig.

    Thanks again
    ~//~


  • Banned | Tip jewfromdahood

    I’m curious do I still need to cut the cables to remove it from going back to the board. Because I plan on being able to have 7 AMD R9 280x GPU’s in one rig. 5 x PCI-E X16 powered riser and 2 x PCI-E X1 --> PCI-E X16 powered riser
    Basically they are these ones [url=http://www.moddiy.com/products/PCI%252dExpress-PCI%252dE-1X-to-16X-Riser-Ribbon-Extender-Cable-w%7B47%7DMolex-%252b-Solid-Capacitor-%2830cm%29.html]http://www.moddiy.com/products/PCI%2dExpress-PCI%2dE-1X-to-16X-Riser-Ribbon-Extender-Cable-w{47}Molex-%2b-Solid-Capacitor-(30cm).html[/url] and their PCI-E X16 --> PCI-E X16 equivalent as well… Do I need to do any modifications to keep it from frying my board or no?
    Also I have planned on two Silverstone Zeus 1,350 Watt PSUs for my rig how should I connect them all? Can I use one PSU for say the motherboard, HD, and such plus 3 GPU’s and their powered Risers and the other PSU to the other 4 GPU’s and their powered risers?