Inventec C202 Motherboards - 10Gbe and 4x SAS ports ~$20

Discussion in 'Great Deals' started by chinesestunna, Aug 17, 2018.

  1. nerdalertdk

    nerdalertdk New Member

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    Yeah, lucky I have 32gb from my old server, might buy just because it so cheap
     
    #61
  2. zack$

    zack$ Member

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    #62
  3. mikehunt114

    mikehunt114 New Member

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    Careful, PC3-12800U is unbuffered non-ECC memory, aka regular RAM. Unbuffered ECC memory is usually designated with an "E". i.e. PC3-12800E.
     
    #63
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  4. zack$

    zack$ Member

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    #64
  5. fake-name

    fake-name Member

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    #65
  6. s0lid

    s0lid Active Member

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    I've one of those LGA1150 boards with single SFP+ port and 2x SAS ports. Didn't post with i5 4570/4590 but works with Xeon 1230L v3 using both ECC and non-ECC udimm. Going to test with G3220 next weekend when one as I get a loaner from a friend this weekend.

    Going to use that board on a tape backup machine either with low wattage xeon or pentium if the latter works.
     
    #66
    Last edited: Dec 13, 2018
  7. zack$

    zack$ Member

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    Also got one of those together with an i3-4160t. Haven't reached yet but fingers-crossed, hope there is no issues with the i3.

    From some pix, I think it comes with a LSI-2308 as opposed to the 2008 in fake name's board.

    Wonder if the x8 slot does bifurcation?

     
    #67
  8. s0lid

    s0lid Active Member

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    Atleast on the PCB's silkscreen it says LSI2308.
     
    #68
  9. s0lid

    s0lid Active Member

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    G3220 boots with ECC UDIMM, I might have recalled wrong with the non-ECC part. Unlike the silkscreen says the HBA-controller is LSI2008.
     
    #69
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  10. zack$

    zack$ Member

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    So it doesn't boot with the i3-4160T. Will consider next options.

     
    #70
  11. fake-name

    fake-name Member

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    So I'm back poking at this.

    After some careful measurement and a bit of poking on digikey, I managed to actually figure out what the connector model number for the "FAN_SIG_CONN" connector on the motherboard is. I picked up connectors for both interfaces:
    IMG_3010_s.jpg

    At that point, the challenge was figuring out what the connections actually do. Poking with an oscilloscope and DMM yielded 8 apparent PWM outputs, 8 pins sitting at ~10.8V, and 4 grounds.

    Since I assume there isn't a external controller that runs the fan, my guess was that the 8 mostly-high pins were supposed to be connected to the open-collector tachometer output on your common 4-wire computer fan. As such, I set up a signal generator to generate a fake ran signal, put a 2.2KΩ resistor in series so I wouldn't blow up anything if I were wrong (hopefully), and stuck that on the probable fan inputs:

    IMG_3008_s.jpg

    And Bam: IPMI is reporting the fan is no longer missing!

    (This was supposed to be a screenshot of the IPMI interface, but apparently I can't hold two oscilloscope probes AND take a picture with my cell-phone at the same time)
    IMG_3009_s.jpg
    Anyways, the IPMI interface is reporting the fan running at 1200 RPM, and I can change the fan speed by adjusting the signal generator.

    I also finally made a proper drawing of the hole locations:

    2019-01-12 02_18_17-Clipboard.png
     

    Attached Files:

    #71
    cactus, Marsh, iamtelephone and 4 others like this.
  12. fossxplorer

    fossxplorer Active Member

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    Damn! Wish I had an EL-skilled friend like you!

     
    #72
  13. nerdalertdk

    nerdalertdk New Member

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    Worning on an pin out chart :)

    Also ejere did you buy the plugs
     
    #73
  14. fake-name

    fake-name Member

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    The place all lazy engineers do their shopping: Digikey

    So this is happening:

    2019-01-13 00_23_59-Server Fan Breakout.png
     
    #74
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