Topic: USB hubs for ASICs (Read 16382 times)
Why are people still farting around with USB ASICs? Am I missing something here?
The manufacturers fucked up bad.
They should have made the connection ethernet or firewire
Most Ethernet chips can support upto 64 simultaneous connections, USB can only handle ONE connection at a time, no matter how many devices are connected. (you could even STREAM the requirements out of the ethernet/firewire controller into the slaves using a single connection)
So once you start slapping on those GH/s units, the USB chain is going to be spending more time in negotiation/connection/disconnection
that it is just not funny.
The only real solution is to DUMP the hubs and load the computer up with USB cards, then at-least you can aim for 1:1 rather than some fucked up binary tree dangling off a single USB host.
HC
They should have made the connection ethernet or firewire
Most Ethernet chips can support upto 64 simultaneous connections, USB can only handle ONE connection at a time, no matter how many devices are connected. (you could even STREAM the requirements out of the ethernet/firewire controller into the slaves using a single connection)
So once you start slapping on those GH/s units, the USB chain is going to be spending more time in negotiation/connection/disconnection
that it is just not funny.
The only real solution is to DUMP the hubs and load the computer up with USB cards, then at-least you can aim for 1:1 rather than some fucked up binary tree dangling off a single USB host.
HC
+1 (I have often thought about this) so I wonder how that 49 port psu powered hub/board slows down 49 333's communicating? thats a lot of info squeezed into the smaller pipe.
Related to quality and durability, by my own experience, US Robotics and Kensington seems to manufacture quality.. I've had those brand for different peripheral/components, those have never failed.. except for a USRobotic router that had cofee in, it just lose the capacity to save config.. I gave it to a friend who do not matter about config, still running, 10 years old !
I really appreciate all your inputs, lots of interesting info/links in this thread ! Thanks to all !
was my 2 satoshi !
I really appreciate all your inputs, lots of interesting info/links in this thread ! Thanks to all !
was my 2 satoshi !
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
guys, it's only 4 amps = 8 ports at full 500mA USB2 specs.
The details show:
- Up to 500 mA power, all ports
- Input: 100 - 240 V, 50/60 Hz; 1.6A, maximum
So I think it will be fine.
No it won't. Re-read the specs. Power adapter part.
Guys you are just talking past each other. Whether or not it can support full USB specs or not, 500mAmps per port is still only 4 amps for the entire hub. I doubt 4 amps is enough to support 8 asic miners working full tilt, even if the power adapter was capable of putting out more than 1.6 amps.
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
guys, it's only 4 amps = 8 ports at full 500mA USB2 specs.
The details show:
- Up to 500 mA power, all ports
- Input: 100 - 240 V, 50/60 Hz; 1.6A, maximum
So I think it will be fine.
No it won't. Re-read the specs. Power adapter part.
The manufacturers fucked up bad.
They should have made the connection ethernet or firewire
Most Ethernet chips can support upto 64 simultaneous connections, USB can only handle ONE connection at a time, no matter how many devices are connected. (you could even STREAM the requirements out of the ethernet/firewire controller into the slaves using a single connection)
So once you start slapping on those GH/s units, the USB chain is going to be spending more time in negotiation/connection/disconnection
that it is just not funny.
The only real solution is to DUMP the hubs and load the computer up with USB cards, then at-least you can aim for 1:1 rather than some fucked up binary tree dangling off a single USB host.
HC
They should have made the connection ethernet or firewire
Most Ethernet chips can support upto 64 simultaneous connections, USB can only handle ONE connection at a time, no matter how many devices are connected. (you could even STREAM the requirements out of the ethernet/firewire controller into the slaves using a single connection)
So once you start slapping on those GH/s units, the USB chain is going to be spending more time in negotiation/connection/disconnection
that it is just not funny.
The only real solution is to DUMP the hubs and load the computer up with USB cards, then at-least you can aim for 1:1 rather than some fucked up binary tree dangling off a single USB host.
HC
+1 for D-Links and Belkins. I recommend them without hesitation.
Well that answers one question... if you actually worked for comcast you wouldn't like either of those manufacturers.
That's true
... +1 for D-Links and Belkins. I recommend them without hesitation.
Well that answers one question... if you actually worked for comcast you wouldn't like either of those manufacturers.
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
guys, it's only 4 amps = 8 ports at full 500mA USB2 specs.
The details show:
- Up to 500 mA power, all ports
- Input: 100 - 240 V, 50/60 Hz; 1.6A, maximum
So I think it will be fine.
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
guys, it's only 4 amps = 8 ports at full 500mA USB2 specs.
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
Thanks for posting that! It really got my attention, now to play the game: if the price is right
.
MondoHub looks perfect.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
http://www.manhattan-products.com/en-US/products/9583-mondohub
Fill that puppy up with ASICs.
I almost bought that hub when it was on sale for $25.
How about using USB power injectors so you can be sure all Jalapenos get full power they need and you don't need to worry about taxing your USB hub; something like this:
http://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
because the wires inside it will melthttp://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
Assuming you know what you're doing to provide power from the power supply; the main point is you can use power injectors.
How about using USB power injectors so you can be sure all Jalapenos get full power they need and you don't need to worry about taxing your USB hub; something like this:
http://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
because the wires inside it will melt http://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
If a powered USB hub is not necessary, is it of any advantage (in terms of reliability, etc). I n other words, assuming, as has been widely reported, that ASICs are powered via barrel connectors, would it be any advantage, still to connect them through powered USB hubs, or would this be needlessly redundant?
The only need for a powered USB hub is for the Jalapeno's.All other ASIC's don't need it,a standard hub will do
How about using USB power injectors so you can be sure all Jalapenos get full power they need and you don't need to worry about taxing your USB hub; something like this:
http://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
http://www.balticnetworks.com/5v-power-injector-for-usb.html
And power all the power injectors with a desktop power supply.
an unpowered hub would not run 1 Jalapeno in almost all cases. The voltage loss, limitations, and the fact that most single USB ports can't get to 4.5W, it's not going to work for most people.
If a powered USB hub is not necessary, is it of any advantage (in terms of reliability, etc). I n other words, assuming, as has been widely reported, that ASICs are powered via barrel connectors, would it be any advantage, still to connect them through powered USB hubs, or would this be needlessly redundant?
For a Single or other device that gets its power elsewhere (and presumably doesn't need any significant power going over USB), there should be no need or advantage to buying a powered hub. However, it would definitely be an absolute necessity for Jalapenos.
If a powered USB hub is not necessary, is it of any advantage (in terms of reliability, etc). I n other words, assuming, as has been widely reported, that ASICs are powered via barrel connectors, would it be any advantage, still to connect them through powered USB hubs, or would this be needlessly redundant?
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