I am philipma1957's other id on this site. this pc is setup with this account as a backup.
37 sticks at 2 gh on a 49 port hub pull 112-115 watts using a seasonic 750 plat power supply so the worst case is 3.11 watts a stick.
it is lower then that as I have 2 thermal take fans plugged in and that number is at the plug not at the stick. give me a minute I will turn off the 2 fans, and measure again. with the fans off 37 sticks at 2 gh giving me 68.7 gh pull 112 watts.
this means 112 /37 = 3.02 watts a stick at the plug in the k watt meter. the draw on the port is less since the most efficient that plat power supply is 90 percent so 3.02 x .90 = 2.72 watts at the port maybe more like 2.57 watts since the psu may be 85% efficient with the 5 volt only load.
so 2.5- 2.7 at the usb port and 3.1 at the plug in the wall for 1 stick at 2 gh clock.
I will do more at 1.8 1.6 and 1.4 over the weekend. for now these sticks are fine to over clock .
since they turn a profit at 20 cents a k-watt until difficulty reaches 40,000 mill. but down the road when diff is 40,000 mill maybe running them at 1.4gh would really drop power use a lot.
Thanks for the info, guys.
It seems an Ant OC'd to 2.0 GH/s theoretically maxes out a USB 2.0 port (.5A = 2.5W); 2.2 GH/s would be pushing it then.
When I benchmarked the USB BEs last year, I came up with a 3WAC draw (at the wall) at around 85% efficiency. Therefore, in perspective, a USB BE and a 2 GH/s Ant have similar power draw but the latter hashes about six times more. Not bad at all.
So, when are they gonna slap these Ant chips on to the mini blades in a Cube. That would result in geek orgasm. That's almost 200 GH/s in a Cube package.
first off 2.2 ran like shit.
2.0 was very stable seems to be the sweet spot
I just setup 1.8 and looks like the watts dropped from 112 to 110 give me time to double check it. saving 2 watts and losing gh is not worth it.
I ran 68.7gh at 112 watts for 1 week in a row. 37 sticks at 2gh with a zombie that would come and go. I will post on same 37 sticks and 1.8gh it has been running for 25 minutes
After 1.5 hours 37 sticks at 1.8 = 62 gh and 109 watts I will run for a day but as of now 2.0 setting is better then 1.8 setting
68 gh/ 112 watts vs 62 gh/109 watts
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the ant chips are in a cube like device.
the s-1 is a lot like a cube.
http://www.ebay.com/itm/AntMiner-S1-Dual-Blades-180-GH-ASIC-Bitcoin-Miner-IN-HAND-SHIP-NOW-Hot-Sale-New-/151202783114?pt=LH_DefaultDomain_0&hash=item2334635f8a
I would like a 10 chip device at a good price that runs off usb.
16gh to 20gh hashrate 240 to 300 dollar price range.
you can add up to 20 per pc. This allows the little guy to grow hash power and be a repeat customer. Adding a cube at 600 bucks is a big buy adding an s-1 at 4000 is a huge buy. adding a 20gh unit for 240-300 many smaller miners will do it once a month.