AntMiner S5 ~1155Gh/s @ 0.51W/Gh 28nm ASIC Bitcoin Miner
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Bitmain’s 3rd generation Bitcoin mining ASIC, the BM1384 provides significant improvements over the previous BM1382 chip. Hashrate per mm2 at voltage 0.75V has been increased over 20% while reducing power consumption by 30%. This improvement is the result of months of hard work and investment in the Bitcoin ecosystem.
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a) you're going to pay to wire money... my bank charges $60 for an international transfer
b) Bitmain releases them in batches... usually 1-2 a month... so it won't ship until that next batch is released
On the plus side though, the price from Bitmain does include shipping and holy crap, it showed up from HONG KONG in three business days! Crazy... I can't mail a letter across town in under four days (no exaggeration... the town 30 mins north of me has taken upwards of 22 days USPS).
Now, let's get to why you want _this miner... we'll start with a disclaimer: nothing I say here will matter if you're not paying for your electric usage... however, for the rest of humanity that gets a monthly bill, your biggest benefit is: electric cost.
Power supplies come in Bronze, Silver and Gold... that's 30% efficient, 20% and 10%... what this means is that, if this unit uses 600w of power (it's 590 I believe but let's keep the math easy), with a bronze power supply you're going to be drawing (charged on your bill) for around 857w... the other 257w is lost to the world... at an average of 10 cents per KwH, this is costing you an extra 2.5cents per hour, every hour of every day... with a 20% and 10% unit you would draw 750w and 660w respectively.
So, this answers three things:
a) what is my cost versus the power supply I get
b) why would I want a more efficient (and more expensive) power supply
c) what size power supply I need... which is dependent upon how efficient it is
Next, let's delve in to cost per Ghs... at around $0.41, it's the 2nd lowest miner I've found... I won't mention the miner that gives a better price per Ghs because it's so much less efficient in power usage, you'd screw yourself to buy it.
Some people have mentioned the fan... it's insanely loud... like, if you put this in a room, you could not have a conversation... if you had this in your bedroom you will face a divorce in 48 hours... it's stupid loud. So, I put mine in my basement :) Barring that, buy these two things:
fan power adapter: http://www.amazon.com/3-Pack-BuyCheapCables%C2%AE-Molex-Power-Adapter/dp/B00M7GVDME/ref=sr_1_3?s=electronics&ie=UTF8&qid=1423695709&sr=1-3&keywords=molex+to+3pin
Replace the fan... use the adapter... you're good to go... PAY ATTENTION TO THE AIRFLOW DIRECTION OF THE FAN!!! Have it blow inward, not outward... and before you order two and think you'll do a "push/pull" on the system, no, it doesn't work. Don't waste the money.
I have three of these running along with an S3 and I produce (on average) 0.1 BTC every other day. It's weird... I charge $80 an hour for my tech services but I'm so much more excited over that damned $12 a day that I ever was over what I do for a living :)
I have placed 500 mBTC on my phone wallet and I'm taking it to Chicago with me this weekend (Feb 2015) to see where and how I can spend it... this is gonne be a good time :)
I have the AntMiner set up with an EVGA SuperNOVA 1300G2 ATX12V power supply.
I put it on a shelf for cooling from the bottom and top.
I don't use a fan.
To Monitor the electricity being used I have a P3 Kill A Watt Electricity Usage Monitor. I got it for about $10.
The monitor is kind of useless. I wanted to attach it to my iPad but realized I could just monitor the miner from my laptop.
Currently, I am in the CEX.IO mining pool which has been going great. I am running my miner 24/7.
This miner is working even better than advertised.
The has rate is about 1.18 TH which is phenomenal for the price.
From running it 24/7, I've made about $50 in a few weeks.
When I sought to return the unit for a functional one they denied. Highly recommended to avoid this seller.
One of the most efficient Bitcoin miners on the market right now, good reliability as long as you keep them under 60c operating temperature. The only serious minus is the "string power" design that does NOT allow you to undervolt an S7 to a significant degree, limits the flexability and long-term profitability of the unit somewhat.
You will probably achieve ROI on these units IF (1) you get them inexpensively enough, OR (2) you have very cheap power - under 6 cents/watt should manage to stay profitable past the "Bitcoin block reward halfing" next summer, though the profit at that point will be very thin unless Bitcoin pricing kicks up faster than difficulty between now and then.
The only issue and the reason that I rated the product a 4/5 is the fan. It's loud. Roughly 70 db loud, which to me is about running AC in your car at full blast. While you can hold a conversation with it running, it's not something you'll want to have running in the same room that your lounging, watching tv, etc. I keep my room at roughly 72f degrees and the AntMiner was running at roughly 58c degrees. Not too shabby. However, you'll probably want replacement fans. I tried several and the best combo are the Scythe DFS123812H-3000 Ultra Kaze 120mm (http://www.amazon.com/gp/product/B001JKNMBE). They are roughly $15 each and you'll want two of them. When hooking them up, do a push-pull configuration. Effectively, the label will face outward on the side that replaces the stock and and inward on the other side. These will raise the AntMiner temperature from 58c degrees to 65c degrees, which is not bad at all, and the sound will drop from the 70 db to about 55 db. Sounds roughly like running your ceiling fan on high. Not too shabby!
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My arrived double boxed in really good condition despite it being "used".Read more