what is a PICe Riser Cable 1X to 16X extension for GPU Mining adapter card?

Happy Hopping

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1) do I have to use it on a mining motherboard?

2) exactly how can you convert PXIe x1 to x16? Do you really get x16 bandwidth? If so, how?
 

GiGaBiTe

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1) No, you don't have to use it on a mining board, but that's what they're designed for. They will usually work on normal motherboards, but there's no point to using them.

2) There's no conversion going on, it's a passive adapter. And no, you don't get x16 bandwidth, you get a single PCIe lane as the adapter implies. PCIe cards generally can operate with fewer lanes than their connector has connections for. GPUs can operate from anywhere between 1-16 lanes, with performance falling off with fewer lanes available. At x1, it gets painful, but crypto mining doesn't need the bandwidth like games do.
 

GotNoRice

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I used something very similar to install a 2nd videocard in a system that only had 1x slots available. The 2nd videocard was just used for extra side monitors displaying 2D content so bandwidth was not an issue. Worked fine.
 

Happy Hopping

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what about x4 card for m.2 NVMe SSD adapater card? how much would we lost if I use the above trick? IN other words, do we really use up 4 lane on NVMe SSD adaptor card?
 

Spartacus09

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1) No, you don't have to use it on a mining board, but that's what they're designed for. They will usually work on normal motherboards, but there's no point to using them.
I disagree, any board with at least 4 or 5 slots is great for mining still as long as its recent enough to have 4g decoding (iirc its z270 and newer).
That will allow the cheap 1 to 4 adapters to be used like this: https://www.amazon.com/gp/product/B07CWPWDF8
A normal motherboard can provide a dozen or more connections this way.
 

GiGaBiTe

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what about x4 card for m.2 NVMe SSD adapater card? how much would we lost if I use the above trick? IN other words, do we really use up 4 lane on NVMe SSD adaptor card?

You'd lose 75% of the available bandwidth. A single PCIe 3.0 lane provides 985 MB/s of bandwidth, or a x4 slot 3940 MB/s. Considering good M.2 SSDs are in the 2500-3500 MB/s range, choking it down to a single lane would cause severely crippled performance. Assuming an M.2 SSD could operate on a single lane, you'd still be better off than a mechanical drive though.

I disagree, any board with at least 4 or 5 slots is great for mining still as long as its recent enough to have 4g decoding (iirc its z270 and newer).
That will allow the cheap 1 to 4 adapters to be used like this: https://www.amazon.com/gp/product/B07CWPWDF8
A normal motherboard can provide a dozen or more connections this way.

You misunderstand why I call such an adapter useless on normal motherboards. Unless your specific application doesn't mind being crippled in bandwidth, it's pointless to use one of these adapters on a normal motherboard doing normal non-mining tasks. Miners are free to dream up whatever configuration works best for them to squeeze as many cards as possible on a single board.
 

Nobu

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Used a similar adaptor to relocate a poorly located 1x slot on a uatx board for a 4x wifi card. I can't/wont saturate the wifi bandwidth, so I'm fine with this solution.
 

Spartacus09

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You misunderstand why I call such an adapter useless on normal motherboards. Unless your specific application doesn't mind being crippled in bandwidth, it's pointless to use one of these adapters on a normal motherboard doing normal non-mining tasks. Miners are free to dream up whatever configuration works best for them to squeeze as many cards as possible on a single board.
I suppose I did, I was going off the original title that was asking essentially what the risers were used for (mining) which has very low bandwidth requirement.
Was just trying to say it doesn't have to be a dedicated mining board to be used efficiently.
 

Martin the Kiteboy

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This seems like an offshoot of the questions you were asking in this thread.

What do you have and what do you want to accomplish? It generally does not matter how many adapters you throw at the problem: At some point any platform becomes I/O saturated. We genuinely want to help, but you do not seem to grasp that we cannot made a wide interface adapt to a narrow pipe without loss. You may not need a wide interface depending on your use case.
 

doubletake

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I don't even understand how OP came to the conclusion that the SATA interface has been phased out.
 

Spartacus09

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From the previous thread that Martin linked, which I'm assuming is what sparked OP's interest in trying to expand PCIe connectivity as much as humanly possible.
Ahhh ok, op made that one as well, thats the link I missed
 

Happy Hopping

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This seems like an offshoot of the questions you were asking in this thread.

What do you have and what do you want to accomplish? It generally does not matter how many adapters you throw at the problem: At some point any platform becomes I/O saturated. We genuinely want to help, but you do not seem to grasp that we cannot made a wide interface adapt to a narrow pipe without loss. You may not need a wide interface depending on your use case.

No, it's not an offshoot.

I was looking at this design:

https://www.alseyecorp.com/home/cooling/open-case1/

and I've never seen a 86 cm long case before, it's like a ship. And that guy has a riser board. So I was wondering for those who build it, due to height limitation of the case, how does the above (#1) link would work if someone were to mount a few riser board on case like this
 

Zepher

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These were made so that you can plug in more than a couple of cards into a machine to mine with.
These were out years and years before "mining" motherboards came out.
 

GiGaBiTe

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and I've never seen a 86 cm long case before, it's like a ship. And that guy has a riser board. So I was wondering for those who build it, due to height limitation of the case, how does the above (#1) link would work if someone were to mount a few riser board on case like this

Above link what?

And you have to use PCIe extender cables on a case like this, it doesn't look like there's any room behind the glass for a video card or much anything else besides liquid cooling pipes.
 

Happy Hopping

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1) above link as in the one at post #1

2) that's why I was looking at that item at newegg if someone were to add anything on a case like this
 
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