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Rev 2 GekkoScience 2-Pac Compac USB Stick Bitcoin Miner 15gh/s+ (BM1384x2)

3.6 3.6 out of 5 stars 98 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand GekkoScience
Memory Storage Capacity 1 GB
Color Green
Special Feature Light Weight
Read Speed 15

About this item

  • 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.

WARNING:

CHOKING HAZARD -- Toy contains a marble. Not for children under 3 yrs.

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Max of 2 units per buyer. Subsequent orders will be cancelled.

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Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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Rev 2 GekkoScience 2-Pac Compac USB Stick Bitcoin Miner 15gh/s+ (BM1384x2)

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Product Description

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.

Customer reviews

3.6 out of 5 stars
3.6 out of 5
98 global ratings

Customers say

Customers like the ease of use, quality and heat of the flash memory. They mention it's a fun learning tool, perfect start into the hobby and a great finger warmer. That said some complain about the value and performance.

AI-generated from the text of customer reviews

8 customers mention6 positive2 negative

Customers find the flash memory easy to use. They mention it's a fun learning tool, perfect start into the hobby, and a good test and intro into mining. Some say it'll also keep their fingers warm during the winter.

"...I'm happy with it though, fun learning tool. Now If I can just get 999 more of these and my own solar farm I'll be set!" Read more

"These are fun little hobby miners when they work. Unfortunately of the 6 I have bought I have had to send 3 back because they just burn out...." Read more

"310/5000It is not easy to configure since it does not bring clear instructions on how to do it, you have to have some knowledge in mining, and..." Read more

"Great introductory product for ASIC mining! Also a great finger-warmer during the winter...." Read more

7 customers mention7 positive0 negative

Customers are satisfied with the quality of the flash memory. They mention that it is a great piece of hardware, performs great, and is pretty impressive for a USB stick.

"...me that I was doing about 12 Gh/s, which is honestly pretty impressive for a USB stick...." Read more

"This Miner is awesome... Mining at 15 G/H at 150 MHZ...can’t ask for anything more out of a usb miner...." Read more

"Wonderful piece of hardware." Read more

"good product, performs great" Read more

4 customers mention4 positive0 negative

Customers like the heat of the flash memory. They say that they have a fan on them and have no heat issues. They also say that the heat sink on each is good and that it's a great finger warmer during the winter.

"...I have a fan on them and have no heat issues...." Read more

"...I soldered a 5 volt fan on it and the heatsink stays room temperature. I'm watching it in Slushpool and it's making the numbers...." Read more

"Great introductory product for ASIC mining! Also a great finger-warmer during the winter...." Read more

"...The heat sink on each is good, but the BE is so think with the heat sink that you can only use every other USB jack on the hub...." Read more

3 customers mention3 positive0 negative

Customers like the appearance of the flash memory. They say it's a pretty cool little device. However, some customers feel it'd be better off buying a different product.

"Very cool, it's like watching an ant push a car. hahaha. It's doing 15 gH/s. That's pretty good. I'll get a pay out in 109 years. hahahahaha...." Read more

"Pretty cool little device, however, I don't think it's worth the money. I bought this to learn more about mining and cryptocurrency in general...." Read more

"It is a neat little device! At the time of writing this review I am learning the ways of bitcoin mining and the software needed to do so." Read more

20 customers mention11 positive9 negative

Customers are mixed about the performance of the flash memory. Some mention that it works better than expected, has a really good hash rate, and works well with their Raspberry Pi, while others say that they never got it to work and it randomly quit working after a random amount of time.

"Good sticks they work well and are stable, I have 4 running 17 gh/s each. I have a fan on them and have no heat issues...." Read more

"...The original creators were selling these items at $25. The item also did not work. I had to take it apart, clean the it, sand down the heat sink...." Read more

"Worked great was able to get 15gh/s and higher. Bad part is will take about 15 years to mine one btc." Read more

"Ordered two sticks. One works fine, the other will randomly quit working after a random amount of time and goes "zombie"...." Read more

5 customers mention0 positive5 negative

Customers are dissatisfied with the value of the flash memory. They mention that it's overpriced and not worth it.

"The product was over priced and did not work. The original creators were selling these items at $25. The item also did not work...." Read more

"...So, you're just buying this for fun, but the price is more than double from what they were originally sold for...." Read more

"No one answers any emails. Complete ignore." Read more

"It works, but it's a waste of money..." Read more

Pretty cool device but no ROI
4 Stars
Pretty cool device but no ROI
Pretty cool little device, however, I don't think it's worth the money. I bought this to learn more about mining and cryptocurrency in general. I had my stick running on 250 MHz no problem on slush pool. My stats on Slush showed me that I was doing about 12 Gh/s, which is honestly pretty impressive for a USB stick. The problem, however, is that most pools have a minimum payout threshold. By the time I would get paid it would be YEARS. Slush was showing I'd reach the payout amount in 69 years...LOL. I would literally get no ROI from this USB stick it would seem, at least on Slush. It would make more sense perhaps having multiple of these sticks running, however, by the time I have enough sticks to make a few cents, I would have spent about the same as just buying a used Antminer on ebay, which can do a few TH/s.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.
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Top reviews from the United States

ruizrk
5.0 out of 5 stars Good mining sticks
Reviewed in the United States on November 26, 2017
Verified Purchase
Good sticks they work well and are stable, I have 4 running 17 gh/s each. I have a fan on them and have no heat issues. Use a good USB hub if not you will have to run them at a lower frequency and you won't be able to maximize your mining power. Don't expect to turn a profit but it is a fun learning experience to run through the process of setting these up with a raspberry pi3
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ruizrk
5.0 out of 5 stars Good mining sticks
Reviewed in the United States on November 26, 2017
Good sticks they work well and are stable, I have 4 running 17 gh/s each. I have a fan on them and have no heat issues. Use a good USB hub if not you will have to run them at a lower frequency and you won't be able to maximize your mining power. Don't expect to turn a profit but it is a fun learning experience to run through the process of setting these up with a raspberry pi3
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4 people found this helpful
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therommy
4.0 out of 5 stars Good way to learn alt-coin mining
Reviewed in the United States on May 16, 2018
Verified Purchase
These USB sticks do mine bitcoin but you will need a lot of them to mine much of anything, which would be a bad idea because you would never get any ROI. You will probably never come close to getting your investment back unless bitcoin goes to a million+ dollars. So as long as you know this before buying then you wont be disappointed.
The sticks can be very finicky and they will just stop mining (no blinking light) then you have to restart your mining software or the system or remove and reinsert the stick or all of these things. It can be frustrating. The positive of all this is you will learn a lot about crypto mining from running one or a few of these.
These sticks need quite a bit of power for each usb port. Many powered usb hubs wont be able to run even one and some powered usb hubs will be able to run a few. Just make sure you get a powered USB hub that has high wattage. Do some research on your powered usb hub before buying.
One other positive about these is they don't use a lot of electricity like some of the other miner hardware out there.

Update; It is possible to fine tune these miners so that you get your voltage correct and have a good USB hub that supplies enough power. Once you get them tuned in they will run for a very long time without incident. Be sure to find the gekkoscience official sport thread for lots of info on these asic miners. I am bumping up my star rating not because these sticks are profitable but you can fine tune them to run for very long periods of time without incident. You will also learn a lot about altcoin mining by getting you a couple of these sticks.
One person found this helpful
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Francisco
1.0 out of 5 stars Very disappointed
Reviewed in the United States on September 20, 2020
Verified Purchase
The product was over priced and did not work. The original creators were selling these items at $25. The item also did not work. I had to take it apart, clean the it, sand down the heat sink. After hours of physical labor reconstructing the item i was able to get it to work but this will not earn you enough bitcoin to reach a payout threshold.
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Robert
5.0 out of 5 stars Does what it says. (Put the lotion in the basket!)
Reviewed in the United States on July 14, 2018
Verified Purchase
Very cool, it's like watching an ant push a car. hahaha. It's doing 15 gH/s. That's pretty good. I'll get a pay out in 109 years. hahahahaha. Fun learning tool and makes the giga hash it says it does. I soldered a 5 volt fan on it and the heatsink stays room temperature. I'm watching it in Slushpool and it's making the numbers. Cool to watch but this won't make you any money. I'm happy with it though, fun learning tool. Now If I can just get 999 more of these and my own solar farm I'll be set!
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David R. Kuykendall
2.0 out of 5 stars If it were $75.00
Reviewed in the United States on January 16, 2018
Verified Purchase
You can use cgminer and point to a p2pool node. It takes 12 x Rev 2 GekkoScience 2-Pac USB miners to produce about 170Gh/s that will pay you ~$40.00 every 2 months using p2pool. If you have less the 170Mh/s you may not block or be in the top producers list, and then you will not get paid at all. So, you might need more than 12. The 2-pac in the name refers to 2x Bitmain BM1384 chips per board. You only get one board in each order. You need to add a powered USB multiport Hub that that has enough amps to run your sticks at 5 VDC 2.1amps for each USB Stick; anything less and they lock up. The USB Hub needs enough room between the plugs to use the ports. i.e., The heat sync gets in the way. So you should plan on a 7 port Hub for 4 USB Sticks. You should also add a fan to blow air across them or they get very hot and will burn you if you touch them. So excluding the fan cost (Not a good idea), each set of 4 USB Sticks and a powered USB Hub will run $200. You will need 3 to 4 sets of these for $600 to $800 total cost. You should see some profit in ($800 / $40) = 20 months or 1 year and 8 months. Unless the block payout halves and then it will be 3 years and 4 months. If it were $17.50 per USB stick, it might be worth it.
11 people found this helpful
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Michael Higgins
5.0 out of 5 stars Fun toy for playing crypto mining and electronics
Reviewed in the United States on August 6, 2018
Verified Purchase
First off, you will not make money off this to recover cost of purchase. This is a nifty little device that personally I'm using for tinkering with solar power, heat distribution, and soon with a raspberry pie. I traditionally GPU mine cryptocurrency and looking at switching to ASICs. This is my starting point, before turning up a 1000 watt monster. My review is based on what I'm using it for, learning and tinkering, and I would by again if I had a use for a second. Mine will probably live put its days plugged directly into a GPU mining rig acting as a visually indicator the system is online and running.
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Michael Higgins
5.0 out of 5 stars Fun toy for playing crypto mining and electronics
Reviewed in the United States on August 6, 2018
First off, you will not make money off this to recover cost of purchase. This is a nifty little device that personally I'm using for tinkering with solar power, heat distribution, and soon with a raspberry pie. I traditionally GPU mine cryptocurrency and looking at switching to ASICs. This is my starting point, before turning up a 1000 watt monster. My review is based on what I'm using it for, learning and tinkering, and I would by again if I had a use for a second. Mine will probably live put its days plugged directly into a GPU mining rig acting as a visually indicator the system is online and running.
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TommyMadro
3.0 out of 5 stars Quality issues
Reviewed in the United States on February 20, 2018
Verified Purchase
These are fun little hobby miners when they work. Unfortunately of the 6 I have bought I have had to send 3 back because they just burn out. Running them at 125 mhz, so not severe OC. But after about 2-3 weeks I lost at least 1 chip on those I had to return. The others are running fine though with only occasionally having to reset for zombie status, and am averaging 12.7 Gh/s on the 3 I have left. Like others have stated, don't expect to make any money on these unless you have access cheap/free power. But if you are curious how mining works these are a perfect start into the hobby. Just wish the quality was better.
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Giuseppe Testa
5.0 out of 5 stars Works right out of the box.
Reviewed in the United States on January 22, 2018
Verified Purchase
Great introductory product for ASIC mining! Also a great finger-warmer during the winter. Just grabbed a second one to learn how to operate multiple workers on a single pool account.
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Giuseppe Testa
5.0 out of 5 stars Works right out of the box.
Reviewed in the United States on January 22, 2018
Great introductory product for ASIC mining! Also a great finger-warmer during the winter. Just grabbed a second one to learn how to operate multiple workers on a single pool account.
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