|
1721
|
Bitcoin / Group buys / Re: [OPEN IN-STOCK] batch #32/31 .035 btc @50 USBs + 49-port hub. 1.1 btc /Blade
|
on: October 29, 2013, 09:30:16 PM
|
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. |
|
|
|
|
1722
|
Bitcoin / Pools / Re: Which pool are best now ?
|
on: October 29, 2013, 08:59:25 PM
|
any suggestion?
I like Eligius, no account and password to setup and issues with that to worry about... recall what occurred with 50btc recently as an example. |
|
|
|
|
1732
|
Bitcoin / Group buys / Re: [OPEN IN-STOCK SHIPPING] batch #30/31 .035 btc @ 14 USB + 1.1 btc Blade miners
|
on: October 28, 2013, 08:42:05 PM
|
I am not sure this is the best place for this discussion, but it is here so what the heck. 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 |
|
|
|
|
1734
|
Bitcoin / Group buys / Re: [OPEN IN-STOCK SHIPPING] batch #30/31 .035 btc @ 14 USB + 1.1 btc Blade miners
|
on: October 28, 2013, 05:35:36 AM
|
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... |
|
|
|
|
1735
|
Bitcoin / Group buys / Re: [OPEN IN-STOCK SHIPPING] batch #30/31 .035 btc @ 14 USB + 1.1 btc Blade miners
|
on: October 28, 2013, 02:11:23 AM
|
just two questions before i submit payment,
1. how would i calculate the shipping for the 100 usb plus 2 hubs?
2. are you selling the hubs separately?
i wanted to add 2 extra hubs to my order. bring it to a total of 100 usb plus 4 hubs
1. I will post info on Monday as far as which label is required for a quantity of 50/100/150 etc + hubs. 2. Not at this time. Want to give everyone a chance to get a hub with an order of 50 USBs. If you send payment, drop me an email, I will respond Monday with the exact label I would need from you. Thanks! |
|
|
|
|
1738
|
Bitcoin / Group buys / Re: [OPEN] ASICMiner 49 port hubs + 50 units! In Stock! 1.75 BTC - Hub only 1.1 BTC
|
on: October 27, 2013, 09:18:14 PM
|
I have thermaltake smart 850, single rail:
Output Specification
AC INPUT Input Voltage: 100V-240V
Input Current: 12A
Frequency: 47Hz-63Hz
DC OUTPUT +3.3V +5V +12V -12V +5VSB
Max Output Current 25A 25A 70A 0.8A 3.0A
Max Output Power 130W 840W 9.6W 15W
Continuous Power 850W
better or worse? I am thinking that the goal is lowest wattage with highest amperage? forgive my stupidity, not an electrician, slept through shop and physics classes and way too many years ago anyways
I assume the +5v 130W is what philipma1957 refers to saying ' most are 125W '
yeah the thermaltake smart 850 has 2 ratings for the secondaries 5 volts at 25 amps and 130 watts. only one of those are correct. since they represent different values. 5 at 25 amps = 125 watts and that does not = 130 watts. newer PSU's are 12 volt only and then 2 dc to dc converter transistor/chips one from 12 v to 3.3 v and one from 12 v to 5 v. the dc converter is more often then not rated at 25 amps. safe 24/7/365 is 80% or about 40 sticks. another PSU: https://bitcointalk.org/index.php?topic=303640.msg3423344#msg3423344 |
|
|
|
|
Show Posts
