[CLOSED] batch #32 0.65 btc per Blade, 49-port HUBS .30 or less

[xzempt]

i was actually referring to blades pricing...

[fractalbc]

I am not sure this is the best place for this discussion, but it is here so what the heck.

Found that this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371004 is available at a local Frys for under $50.  I picked one up to test with the hub Monday.

ATX 5V at 30 Amps should have no issues powering up the 49 port hub.  

Any idea what gauge the wires are? I have a 5v30a ps but the AWGis 21.. im being told too thin of  a wire =/

I doubt that is correct.  21 AWG according to the table I just looked at will handle 49 amps, but not sure at which voltage...
AWG is used for solid wires, chances are good that the multitude of wires coming out of that PSU over to the ATX connector is NOT solid but stranded, this the AWG measure isn't applicable...
Maybe there are some electricians here who can chime in...

ATX power supplies will typically use 16 or 18 AWG wire.  Better ones use 16AWG.  It is always stranded.  I believe the ATX spec calls for 16.  I am not sure what table you are looking at but 21 AWG can't handle 49 amps.  More like 5 or 6.  You can ignore the "free air" column if there is one and look at the "enclosed" or "bundle" column.  16 AWG is good for 10 or 12 amps.  The insulation is what determines the maximum voltage, not the wire size.  The wire on a random ATX power supply I just looked at is rated at 300v.

I hope these hubs have an internal DC-DC converter and don't use the 5V rail exclusively.  This is unlikely due to cost constraints.

I hear they don't which is mixed blessing.  The good news is it lets you push as many amps as the connector / traces will carry by providing a bigger power supply.  The better news is it doesn't limit the power consumption the capacity of the DC-DC converter. 

The bad news is the ATX connector limits the current to 8 amps per pin with 16 AWG wire ( http://www.molex.com/pdm_docs/ps/PS-45750-001.pdf ) and there are only 5 pins for the 5v rail making the total you can reasonably expect before you risk melting the connector 40 amps.  Google "tyan tiger mp melted connector" if you want to read stories about what happens if you push too much.  http://imageshack.us/photo/my-images/179/p10101811pf.jpg/ for those who just want the picture.

The harsh reality is there are few modern ATX power supplies with more than 20 amps on the 5V rail and precious few with 30 or more.  There are a few like the antec basiq linked above but you have to check the specifications very carefully.

[CanaryInTheMine]

I am not sure this is the best place for this discussion, but it is here so what the heck.

Found that this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371004 is available at a local Frys for under $50.  I picked one up to test with the hub Monday.

ATX 5V at 30 Amps should have no issues powering up the 49 port hub.  

Any idea what gauge the wires are? I have a 5v30a ps but the AWGis 21.. im being told too thin of  a wire =/

I doubt that is correct.  21 AWG according to the table I just looked at will handle 49 amps, but not sure at which voltage...
AWG is used for solid wires, chances are good that the multitude of wires coming out of that PSU over to the ATX connector is NOT solid but stranded, this the AWG measure isn't applicable...
Maybe there are some electricians here who can chime in...

ATX power supplies will typically use 16 or 18 AWG wire.  Better ones use 16AWG.  It is always stranded.  I believe the ATX spec calls for 16.  I am not sure what table you are looking at but 21 AWG can't handle 49 amps.  More like 5 or 6.  You can ignore the "free air" column if there is one and look at the "enclosed" or "bundle" column.  16 AWG is good for 10 or 12 amps.  The insulation is what determines the maximum voltage, not the wire size.  The wire on a random ATX power supply I just looked at is rated at 300v.

I hope these hubs have an internal DC-DC converter and don't use the 5V rail exclusively.  This is unlikely due to cost constraints.

I hear they don't which is mixed blessing.  The good news is it lets you push as many amps as the connector / traces will carry by providing a bigger power supply.  The better news is it doesn't limit the power consumption the capacity of the DC-DC converter. 

The bad news is the ATX connector limits the current to 8 amps per pin with 16 AWG wire ( http://www.molex.com/pdm_docs/ps/PS-45750-001.pdf ) and there are only 5 pins for the 5v rail making the total you can reasonably expect before you risk melting the connector 40 amps.  Google "tyan tiger mp melted connector" if you want to read stories about what happens if you push too much.  http://imageshack.us/photo/my-images/179/p10101811pf.jpg/ for those who just want the picture.

The harsh reality is there are few modern ATX power supplies with more than 20 amps on the 5V rail and precious few with 30 or more.  There are a few like the antec basiq linked above but you have to check the specifications very carefully.

thanks for the info!!! much appreciated

[CanaryInTheMine]

Dropping off USPS packages..

[damagebritain]

So I'm considering buying, could you point me at a power supply online somewhere that would be compatible? If the power supply has two 6 pin connectors could it power two of the 49 port hubs at max capacity? hoping you guys would know.

[CanaryInTheMine]

So I'm considering buying, could you point me at a power supply online somewhere that would be compatible? If the power supply has two 6 pin connectors could it power two of the 49 port hubs at max capacity? hoping you guys would know.

See my post above please: https://bitcointalk.org/index.php?topic=303640.msg3423344#msg3423344
I got it at a local Frys (they are on ebay as well)

and some pics are here: https://bitcointalk.org/index.php?topic=303640.msg3428585#msg3428585

[CanaryInTheMine]

philipma1957 has found this PSU:

http://www.mcmelectronics.com/product/58-12860  
use code   afc909     get a 15% discount  to under  14 bucks plus shipping!

It should be tested Wed/Thur to know for sure, but from the specs, it looks to be a great PSU to power one of these hubs (for the $).

DO NOT BUY ABOVE PSU. it does not work.

[CanaryInTheMine]

Here are the stats on the 49 port HUB (pic above) running for 18+ hrs so far:

[xyzzy099]

Here are the stats on the 49 port HUB (pic above) running for 18+ hrs so far:

It's interesting that all your erupters show up as the old Emerald (BEE) erupters.  All of mine show up as BES (Block Erupter Sapphire).

No idea if it even makes a difference...

[CanaryInTheMine]

Here are the stats on the 49 port HUB (pic above) running for 18+ hrs so far:

It's interesting that all your erupters show up as the old Emerald (BEE) erupters.  All of mine show up as BES (Block Erupter Sapphire).

No idea if it even makes a difference...

Interesting observation... I am running this on bfgminer ver 3.1.3 and using "-S erupter:all" command... one of these 2 things is probably causing them to get the BEE label instead of BES.

[CanaryInTheMine]

Today's orders were dropped off at USPS before 7 PM.

[philipma1957]

philipma1957 has found this PSU:

http://www.mcmelectronics.com/product/58-12860  
use code   afc909     get a 15% discount  to under  14 bucks plus shipping!

It should be tested Wed/Thur to know for sure, but from the specs, it looks to be a great PSU to power one of these hubs (for the $).

Mine is due to my home on weds I will test it and post in this thread and in crazy guy's thread.   they had a lot in stock .


 I just went to the link and added 200 to my cart they only have 153 in stock...  So waiting may be smarter  then buying.

 My results should post  in about 20 hours.

[mackstuart]

mackstuart, 10, .35, 1FqQ4epQphzB8b9tJZHgsPMxyZP5WtrVnu

9fa8bffa84c8bf7acc996e03843a453ae22453e23b0f41bd2e3b11da665b1703

[Chronikka]

philipma1957 has found this PSU:

http://www.mcmelectronics.com/product/58-12860  
use code   afc909     get a 15% discount  to under  14 bucks plus shipping!

It should be tested Wed/Thur to know for sure, but from the specs, it looks to be a great PSU to power one of these hubs (for the $).

Mine is due to my home on weds I will test it and post in this thread and in crazy guy's thread.   they had a lot in stock .


 I just went to the link and added 200 to my cart they only have 153 in stock...  So waiting may be smarter  then buying.

 My results should post  in about 20 hours.

Thanks!

[philipma1957]

philipma1957 has found this PSU:

http://www.mcmelectronics.com/product/58-12860  
use code   afc909     get a 15% discount  to under  14 bucks plus shipping!

It should be tested Wed/Thur to know for sure, but from the specs, it looks to be a great PSU to power one of these hubs (for the $).

Mine is due to my home on weds I will test it and post in this thread and in crazy guy's thread.   they had a lot in stock .


 I just went to the link and added 200 to my cart they only have 153 in stock...  So waiting may be smarter  then buying.

 My results should post  in about 20 hours.

Thanks!

  you are welcome  the psu part should arrive  in about 7 hours.  I will post.

[CanaryInTheMine]

packing USPS orders...

[camolist]

"out for delivery" looks like delivery will be about 48 hours after payment. maybe BFL needs to make a new hire 


corsair 1200 claims 30 amp on 5v  up to 180 watts between 3 and 5 volts and it's currently only being used on 12 volt so should be set

will update with pictures on delivery

[CanaryInTheMine]

"out for delivery" looks like delivery will be about 48 hours after payment. maybe BFL needs to make a new hire  


corsair 1200 claims 30 amp on 5v  up to 180 watts between 3 and 5 volts and it's currently only being used on 12 volt so should be set

will update with pictures on delivery

I am often imitated, but never duplicated!  
the 30 amp 5v ATX should work like a champ for you! 122.5/180 = 68%

[camolist]

mining @ http://eligius.st/~wizkid057/newstats/userstats.php/1PLCBv4fcXMzWPMJUJCcBiguB33iPe8axn


shall see how this turns out. have 8 "extras" going to try and sell off for paypal at a markup.....hubs i planned on using them are not handling them very nice

[CanaryInTheMine]

mining @ http://eligius.st/~wizkid057/newstats/userstats.php/1PLCBv4fcXMzWPMJUJCcBiguB33iPe8axn


shall see how this turns out. have 8 "extras" going to try and sell off for paypal at a markup.....hubs i planned on using them are not handling them very nice

Awesome!! warms my heart!!
P.S. todays packages went out about 30 mins ago...