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I need to fit a fully-functioning mobo with an LGA1151 cpu socket and a PCI-E x16 slot for my gpu and at least 2 RAM slots in a 11 x 5.5 x 7 case. It also has to have a maximum RAM capacity of at least 32GB. No need for fancy stuff like LED controllers or anything though. Just the bare functional basics, because it will be in a very closed off case, so it doesn't need to look nice at all. Does anyone know of a 1: Very small but full-featured motherboard, or 2: a company that would be willing to manufacture 1-2 motherboards of a very small size for a couple hundred dollars. Any other options would also help, but those are the main 2 things I'd be looking for. My budget per board is around $250, give or take a bit.

EDIT: I've read around a bit, and I've figured out that it will probably be way too much money to make a mobo, but what about modding an already made one?

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  • I've heard that it's very expensive to manufacture even one mobo:(
    – Will Hopkins
    Jan 5 '17 at 22:32
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To translate your dimensions into normal terms, you're looking for a Mini-ITX (or Mini-DTX) board.

I'd recommend the Asus H110I-PLUS/CSM, $86 from Newegg:

  • 6.7" x 6.7"
  • Socket LGA1151
  • Two RAM slots supporting a total of 32 GB
  • One PCIe 3.0 x16 slot
  • Reasonably "full-featured": 4 SATA ports, 6 USB ports, Ethernet, eight-channel audio

The chipset and voltage regulators are passively cooled with small heatsinks, which may or may not be a problem for a "very closed off case".

I don't have any experience with this particular product, but I've had good luck with Asus mainboards in the past.

Here is a Wikipedia link to form factor sizes for reference. This can provide you all the options for size options that are offered based on size standards. Keep in mind that anything smaller than Mini-ITX is unlikely to have a PCIe slot, and is likely to have just a single SO-DIMM slot for memory.

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  • Also, isn't mini ATX smaller than mini-ITX?
    – Will Hopkins
    Jan 8 '17 at 3:46
  • @WillHopkins, there are two "mini-ATX" form factors: 5.9" x 5.9", and 11.2" x 8.2". They're both rare -- Amazon lists one board that uses the 11x8 standard, and neither Amazon nor Newegg lists a board that uses the smaller standard.
    – Mark
    Jan 8 '17 at 22:56
  • Thanks, that explains why when I look up mini-ATX i just get ATX and min-ITX in the search results:)
    – Will Hopkins
    Jan 9 '17 at 16:48
  • Also, is there a board with an LGA1150 socket that you'd recommend? I found some that I'm looking into, but they don't have the best reviews... It's a $60 one from MSI... it should be fine tho cuz this is a test PC and not the final build. I'll be using my 1151 i7 in the final one and a 1070 FE, but for this i'm using an i5 with the lga1150 and a 960 SSC...
    – Will Hopkins
    Jan 9 '17 at 16:51
  • It's unlikely there will be an LGA1150 board that meets your requirements. Most LGA1150 CPUs only support 8 GB per memory stick, and Mini-ITX boards almost never have more than two memory slots.
    – Mark
    Jan 9 '17 at 22:15

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