Bitcoin Forum

I would like to ask which hardware gives the best performance to unlock blocks?
https://www.bitcoinmining.com/bitcoin-mining-hardware/

1)AntMiner U2
 
2 Gh/s
1.0 W/Gh
0.8 ounces
Yes
$49.66

2)BPMC Red Fury USB
 
2.5 Gh/s
0.96 W/Gh
1.6 ounces
Yes
$44.99

3)GekkoScience
 
9.5 Gh/s
0.33 W/Gh
0.8 ounces
Yes
$49.97

Help me choose please...

P.S I heard Asics ones are not bad also

For you information: all three of these devices are ASIC's, and the chances of ROI'ing (paying back your investment by mining) for all three of them are close to 0. The only way of actually making any profit (at all) is by getting them (almost) free and by stealing electricity (which i don't endorse)

If you were forced to chose, i'd defenately go for the gekkoscience compaq... But don't expect any profit from using it. The compaq is great for learning how to mine, for insta-mining new sha256d altcoins, or as a lottery mining device...  But that's it.

Here's the full profit calculation based on the following aspects:

• static diff (instead of rising diff)
• static btc price (instead of fluctuating)
• static block reward
• power usage of 3 Watt (so, i disregarded the driver completely and rounded the power usage DOWN)
• power price of 10 cents/Kwu (most people pay more)
• no shipping costs for the device
• no downtime... ever

link to calculator website (https://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=9.5&p=3&pc=0.1&pf=1&d=1103400932964.29000000&r=12.50000000&er=4342.28040000&hc=50)

As you can see, with these conditions, you'd make 77 cents/year (after power costs have been deducted... You'd make $3.43 if you'd steal your power, but getting caught stealing power would probably ost you your job or worse). At 77 cents/year income, it would take you 65 years to pay back the stick...
In reality, the diff will probably rise. The block reward halves every ~4 years. The price fluctuates. The stick + driver use more than 3 Watt. You'll (probably) pay more than 10 cents/Kwu. You'll (probably) have to pay S&H. Your stick won't run 24/7 for 65 years.

So in reality, you'll probably never ROI by mining BTC with the gekkoscience compaq... The other ones in your list are even worse.

Depends on what your electricity price is and other variables related to your situation.
None of the miners you've stated are worth the money. You should have been looking at miners at the top of the page instead.