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Mini-DTX Hype Thread (ITX with two PCIe slots!) - Page 82

post #811 of 976
Quote:
Originally Posted by timerwin63 View Post

If I had to guess, I'd say Dyson saw your previous post but was basically saying "It's not really worth it as just running another 1/2 of PCB would be cheaper and easier."

The reason the board you linked works at all is because the two 1x "expansion" slots are on either side of the 16x slot, which is space that already exists in the mITX standard. Fitting an 8x lane would be very difficult. Actually, the only way I think it'd work is by adding some kind of very thin and probably very fragile proprietary connector on the back of the board. If you go that route, fitting said connector in the 6mm defined in the mITX standard (for standoff length) would be rather difficult. Even then, you don't guarantee compatibility, as some manufacturers use shorter standoffs (I have a handful of 4 and 5mm standoffs I got out of cases. From a design perspective, it'd be immensely easier (and probably notably cheaper) just to produce a slightly larger PCB and run the traces for the extra slots.


Im thinking they could do it via cables instead of the "sli" style plugs on the bottom. If they put a single plug and a include a cable they could totally get it done.

Checkout the asrock btc kit


hey use a pair of sata cables to provide data from one board to another. I actually almost got one of these today because it was only 4 bucks at microcenter.
post #812 of 976
Quote:
Originally Posted by ejohnson View Post

Im thinking they could do it via cables instead of the "sli" style plugs on the bottom. If they put a single plug and a include a cable they could totally get it done.

Checkout the asrock btc kit

hey use a pair of sata cables to provide data from one board to another. I actually almost got one of these today because it was only 4 bucks at microcenter.

Why use a cable when the slot I want to use is going to be a few mm away that I'd then have to carefully route around the cramped interior of my case? Why not just some traces and a bit more PCB (which would also give some component spacem by the way)?

On top of that, you're still going to need to find the space for the connector, which won't be particularly small. We're talking about an 8x slot, not a 1x or even a 4. It'll also have to be on the edge to ease cable management as alluded to earlier. There's not a whole lot of "spare" space on ITX boards as it is, at least not the ones you'd want to run SLI on.
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post #813 of 976
Why use a cable or slot that makes everything hard? They could just use a FPC/PCB hybrid assembly that plugs into a connector on the bottom of the board, just like you described. Those are really, really thin and they would allow you to not expand your board to fit single-slot ITX cases or expand it to anything with a total of 16 PCIe lanes, maybe even more.
That assembly could even have detector contacts that close certain circuits on the board so the riser would be pretty much plug and play.
post #814 of 976
Quote:
Originally Posted by iFreilicht View Post

Why use a cable or slot that makes everything hard? They could just use a FPC/PCB hybrid assembly that plugs into a connector on the bottom of the board, just like you described. Those are really, really thin and they would allow you to not expand your board to fit single-slot ITX cases or expand it to anything with a total of 16 PCIe lanes, maybe even more.
That assembly could even have detector contacts that close certain circuits on the board so the riser would be pretty much plug and play.

That's obviously the best and most versatile solution. Someone call ASRock, I need one of these on their next 2011 board.
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post #815 of 976
Okay, so a question about this. If you got a very, very high-frequency multiplexer, could you send 16 PCIe lanes over the equivalent of just one? For PCIe 2.0, it'd have to run at 40GHz, but... Could it be done?
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post #816 of 976
Quote:
Originally Posted by timerwin63 View Post

That's obviously the best and most versatile solution. Someone call ASRock, I need one of these on their next 2011 board.

This actually kinda brings up a point.... Who would of wanted a socket 2011 itx, then asrock made it and people want it. I think if asrock makes this, it will sell.
post #817 of 976
Asrock made a budget board specially for BTC mining, then they made the first consumer X99 mini ITX board- I think they experiment with new markets more than what most people give them credit more.
post #818 of 976
Quote:
Originally Posted by CynicalUnicorn View Post

Okay, so a question about this. If you got a very, very high-frequency multiplexer, could you send 16 PCIe lanes over the equivalent of just one? For PCIe 2.0, it'd have to run at 40GHz, but... Could it be done?

I suppose it'd be possible in theory. The speeds you'd need would be insane (graphene save us), and there's a pretty good chance you wouldn't be able to use the data immediately so it'd need to be "stored" until the next 16x-equivalent clock would go. I'd be willing to bet this would need to be done because of the way the standards have been written and the way the data is used. It'd be very interesting to see, for sure.
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post #819 of 976
Quote:
Originally Posted by ccRicers View Post

Asrock made a budget board specially for BTC mining, then they made the first consumer X99 mini ITX board- I think they experiment with new markets more than what most people give them credit more.

Well, I think as a group we should write a letter to send to asrock, link this thread and see what we can get. They really do seem like the best company to do this. Plus I like their boards smile.gif
post #820 of 976
Quote:
Originally Posted by ejohnson View Post

Well, I think as a group we should write a letter to send to asrock, link this thread and see what we can get. They really do seem like the best company to do this. Plus I like their boards smile.gif

There's a pretty good chance they have a product rep who patrols the forums, you could try looking for them and sending them a PM linking them here asking them to show it around and probe around for some internal interest before anyone asks ASRock to start some serious R&D.

Edit: Apparently the ASRock rep is @Nickshih, although according to their profile, they've been inactive since July of '14, so that's bound to be a dead end.
Edited by timerwin63 - 2/4/16 at 5:06pm
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