pornluver (OP)
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March 12, 2017, 02:47:35 PM |
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With tons of PCI-e slots?
What about a regular motherboard with tons of USB slots or tons of normal PCI slots?
What about external video card?
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nu1mlock
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March 12, 2017, 04:27:53 PM |
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How do you plan to connect and power a GPU through USB? It's simply not possible.
External GPU's (or rather, cases for them) are a lot more expensive than a single motherboard.
So to answer your question - yes.
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ccccccc7
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March 12, 2017, 05:22:14 PM |
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Of course.
It is the cheapest best option...
What is this bluster about GPU via USB or normal PCI? If these can be done then I doubt it will be economically viable.
Why not just buy a mobo with 6/7 pci-e slot, they are hardly special..
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pornluver (OP)
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March 14, 2017, 09:55:28 AM |
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Such as?
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lummujaj
Member
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Activity: 66
Merit: 10
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March 14, 2017, 10:13:58 AM |
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Such as?
once upon time a go two smart man were drinking a beer at theirs local bar (Larry Page and Sergei Brin ) , they did have a debate about something , and they needed some answer about it . So GOOGLE was created , to find every answer there . and if you go www.goog.com and type "7 gpu mining rig" you will have plenty of information, even some have successfully buid 8 gpu mining rig , with spliters or m.2 to pcie etc , you dont have to be that smart like them , you just have to fellow theirs build . THATS ALL , [END OF SARCASM - in case you didnt realize]
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pornluver (OP)
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March 14, 2017, 12:31:58 PM |
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I don't need just 7 or 6 rig mobo.
I need something cost effective, with plenty of air. Basically I need something or alt miner uses.
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pornluver (OP)
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March 14, 2017, 12:47:03 PM |
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For example, just look at this https://www.youtube.com/watch?v=EWVyutw3hZkthe guy don't just put all of his 7 card on the motherboard. There will be too many video card on very small spaces. So he uses something else to connect those card to motherboard. I don't exactly know what. He uses MSI Z97 However, that MSI 797 doesn't have pci-e connectors. It has a bunch of PCI connectors.
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h311m4n
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March 14, 2017, 12:52:00 PM |
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I don't need just 7 or 6 rig mobo.
I need something cost effective, with plenty of air. Basically I need something or alt miner uses.
Currently there isn't really anything that is more cost effective other than buying GPUs at the cheapest price possible, get a cheap btc pro or other known-to-work mobo with 6+ slots and a solid PSU. Then mod the shit out of the GPUs to achieve a great watt/hash ratio. Stick all of that in/on a cheap DIY mining frame and off you go. There are server boards with like 16 or more pci-e slots but they cost $$$$$. Also old PCI slots have a very low bandwidth as opposed to pci-e. There are pci to pci-e adapters but I don't know what the performance of a GPU running on such an adapter would be.
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pornluver (OP)
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March 14, 2017, 01:02:45 PM |
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That is exactly what I am asking. So it has 3 * 16 and 4 * 1. All of them are called PCI-e connector. I see. Now what about the 4*1. Will that degrade the video card performance in mining? All I need is CPU with tons of pci-e connector then if it's not. Also they use a USB 3.0 cable to connect 3*16 to the 4*1 one. So why can't they connect to USB slot straight?
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h311m4n
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March 14, 2017, 01:41:45 PM |
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That is exactly what I am asking. So it has 3 * 16 and 4 * 1. All of them are called PCI-e connector. I see. Now what about the 4*1. Will that degrade the video card performance in mining? All I need is CPU with tons of pci-e connector then if it's not. Also they use a USB 3.0 cable to connect 3*16 to the 4*1 one. So why can't they connect to USB slot straight? Wether a pci-e slot is 1x or 16x has no impact on mining performance. Careful though, it's not because a motherboard has 6-7 pci-e slots that all of them will work in a 6+ GPU rig. This is why most people buy "specialized" motherboards that are known to work without issues. The AsRock BTC Pro for instance was specifically designed for mining. So why can't they connect to USB slot straight? Because this is not how it works . Other than the bandwidth, a USB slot has a max power rated at 4.5W (for USB 3.0), a pci-e slot is at 75W. If you'd plug a riser into a USB port with a GPU, you'd probably fry the port and the motherboard...(some more techy people can maybe explain better).
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pornluver (OP)
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March 15, 2017, 01:07:44 PM |
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Oh
So not all motherboard would work.
What I am thinking is that the power go from power supply straight to the GPU. All that we need next is for the GPU to transfer data, and only data, to the motherboard.
That is why I cannot understand why USB don't cut it.
I know USB don't handle much power. But power goes from power supply straight to the GPU.
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nu1mlock
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March 15, 2017, 01:25:47 PM |
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Because USB is slow as hell. Also, that's not how it works.
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Ambros
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March 15, 2017, 01:50:24 PM |
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Because USB is slow as hell. Also, that's not how it works.
Actually that's not the reason, in fact everyone use USB3 risers to connect GPU's to motherboard. That means that the bandwidth is enough.. The only reason that we do this is money: The cheapest way is buy a mobo with many PCIE. They are not special mobo, for example the MSI gaming 5 is a widely used mobo in desktop entry level pc and it's algo good for mining
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emdje
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March 15, 2017, 03:59:58 PM |
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the more gpu's the more unstable the system. If you have many gpu's on one system and one system shuts down than you have more gpus that are not mining. 5 seems to be stable enough, 6 maybe, more I don't really see the practical use for
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xxcsu
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March 15, 2017, 04:35:18 PM |
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the more gpu's the more unstable the system.
totally wrong ... many people have rig built with 6-7-8 cards and all working fine , perfectly stable ... I have only 6 or 7 card rigs all of them extra stable... yes! you can build a unstable system with 6+ cards if you have no idea what you are doing
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LoneRangir
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March 15, 2017, 11:32:23 PM |
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yes! you can build a unstable system with 6+ cards if you have no idea what you are doing
What are the major (top 3?) reasons multi-card rigs are unstable, in your opinion? Under-sized PSU? Cheap USB risers? I think these are the reasons my build have been unstable and lock up after 4 or 5 minutes.
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koody
Member
Offline
Activity: 114
Merit: 20
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March 15, 2017, 11:36:39 PM |
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Dont need special motherboard, use USB pci-e adapters.
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Dobmaster
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March 16, 2017, 09:29:08 AM |
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Dont need special motherboard, use USB pci-e adapters.
Do you mean the PCIE 1 to 3 expander?
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