GekkoScience Compac USB Stick Bitcoin Miner 15gh/s+ (BM1384x2)
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- 15+gh/s mining speed(Higher speed requires usb port above spec)
- 32-.35 watts per gh!
- Completely silent operation
- 2x Bitmain BM1384 chips
- 2-pac is the name(2 chips one board) This is not a "2 pack" of miners, but a single miner with 2 chips.
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The most efficient USB miner ever manufactured is available in limited quantities! The 2-PAC Compac features 2 Bitmain BM1384 chips (same chip in S5) and a fully adjustable regulator design that gives you a core voltage range of 550mV to 800mV. Typical hasrate is 15+gh/s depending on clock rate. Efficiency is .31-.35 watts per gh. **NOTE** This is the "2-pac" usb miner. It is not a "2 pack" of usb miners. It is named 2-pac because it is a single miner with 2 asic chips, as opposed to 1.
Max of 2 units per buyer. Subsequent orders will be cancelled.
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Also, this thing runs extremely hot (duh). I was playing around with my dog and I accidentally bumped into it and now I have a scar in the shape of the heat sink on my arm. Make sure you plug this into a place where nobody can accidentally touch it.
I spent a few days looking for guides for installing cgminer on a RP3 and was having a lot of trouble, but this unit comes with instructions on how to download what you need from Gekko. It was quick and easy and this thing was clocking 8.5ghz immediately.
[UPDATE] I have messed around with the overclocking and this little thing is amazing. It comes stock at 100mhz and that gets you 8.5GH for mining. I upped it to 125mhz and got a very stable (0 HW errors) 13GH. At 150mhz it is a little unstable, but you are getting 15GH. I was able to run it all the way up to 250mhz where I was getting an amazing 26GH, but it was very unstable logging hundreds of HW errors.
All by itself, at 100mhz and 8.5GH, this will generate about .00001 BTC daily. A laughable amount but I am still curious because there is a terrific support forum where they discuss running multiple 2PACs overclocked, with very specific instructions on what people are doing with voltage on the chip.. I have ordered 4 more miners to see if I can get to .00015 BTC daily.
FURTHER UPDATE: Its been a few more weeks and I have played around with them enough to be getting 21.7GH from this stick at 200MHZ. It takes minor tweaking of an on the stick adjustment, them boom. The designer says you can get more GH by increasing the voltage and the MHZ but I am good at the very stable rate I am getting. All 5 I have are generating .000057 BTC per day, which is currently $0.10 hahaha