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

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

  1. nerdalertdk

    nerdalertdk Member

    Joined:
    Mar 9, 2017
    Messages:
    52
    Likes Received:
    7

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

    zack$ Member

    Joined:
    Aug 16, 2018
    Messages:
    80
    Likes Received:
    26
    #62
  3. mikehunt114

    mikehunt114 New Member

    Joined:
    Sep 19, 2017
    Messages:
    23
    Likes Received:
    3
    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
    Patriot likes this.
  4. zack$

    zack$ Member

    Joined:
    Aug 16, 2018
    Messages:
    80
    Likes Received:
    26
    #64
  5. fake-name

    fake-name Active Member

    Joined:
    Feb 28, 2017
    Messages:
    101
    Likes Received:
    73
    #65
  6. s0lid

    s0lid Active Member

    Joined:
    Feb 25, 2013
    Messages:
    253
    Likes Received:
    30
    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

    Joined:
    Aug 16, 2018
    Messages:
    80
    Likes Received:
    26
    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

    Joined:
    Feb 25, 2013
    Messages:
    253
    Likes Received:
    30
    Atleast on the PCB's silkscreen it says LSI2308.
     
    #68
  9. s0lid

    s0lid Active Member

    Joined:
    Feb 25, 2013
    Messages:
    253
    Likes Received:
    30
    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
    zack$ likes this.
  10. zack$

    zack$ Member

    Joined:
    Aug 16, 2018
    Messages:
    80
    Likes Received:
    26
    So it doesn't boot with the i3-4160T. Will consider next options.

     
    #70
  11. fake-name

    fake-name Active Member

    Joined:
    Feb 28, 2017
    Messages:
    101
    Likes Received:
    73
    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
    blood, cactus, Marsh and 5 others like this.
  12. fossxplorer

    fossxplorer Active Member

    Joined:
    Mar 17, 2016
    Messages:
    372
    Likes Received:
    35
    Damn! Wish I had an EL-skilled friend like you!

     
    #72
  13. nerdalertdk

    nerdalertdk Member

    Joined:
    Mar 9, 2017
    Messages:
    52
    Likes Received:
    7
    Worning on an pin out chart :)

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

    fake-name Active Member

    Joined:
    Feb 28, 2017
    Messages:
    101
    Likes Received:
    73
    The place all lazy engineers do their shopping: Digikey

    So this is happening:

    2019-01-13 00_23_59-Server Fan Breakout.png
     
    #74
    blood, Rain and omgwtfbyobbq like this.
  15. fake-name

    fake-name Active Member

    Joined:
    Feb 28, 2017
    Messages:
    101
    Likes Received:
    73
    IT'S HAPPENING

    DSC00902_s.jpg

    Boards came in. I managed to be completely boneheaded while designing AND assembling them. I managed to mirror the pin-1 location of the small connector (P1). Fortunately, I was able to wire the cable to fix the layout without issue. It'd be a nasty trap if someone was building one without carefully checking the wiring, but considering the one I built will probably be the only one ever built, I think I can ignore that.

    I also somehow put all 8 of the fan headers on backwards initially, despite the fact that I even put giant white bars on the silkscreen to show the correct orientation. It was easy enough to fix, but annoying enough. I guess I didn't have enough caffeine when I was doing assembly.

    (Assembly, with headers on backwards)
    DSC00906_s.jpg

    Anyways, the end-result works nicely:
    DSC00908_s.jpg

    I get 3-wire-fan RPM feedback, and 4-wire fan speed control for all 5 channels the BMC is configured to support.

    Interestingly, the actual hardware has 8 channels of PWM output/tachometer feedback. The last 3 channels are wired up mostly because it seemed silly to not place them, but unless I actually need more then 5 channels (and can figure out how to convince the BMC to report them, it doesn't at the moment), they'll probably never be used.
     
    #75
    nle, blood, omgwtfbyobbq and 5 others like this.
  16. s0lid

    s0lid Active Member

    Joined:
    Feb 25, 2013
    Messages:
    253
    Likes Received:
    30
    [​IMG]

    Throwing one of those lga1150 boards into 4U atx case was way easier than i thought.
     
    #76
    omgwtfbyobbq and blood like this.
  17. fake-name

    fake-name Active Member

    Joined:
    Feb 28, 2017
    Messages:
    101
    Likes Received:
    73
    I spent far more time then I'd like to admit before I realized they're basically using ATX hole positions.
     
    #77
Similar Threads: Inventec C202
Forum Title Date
Great Deals Inventec dual 2011-3 boards 90$ Nov 7, 2018

Share This Page