Quote from: jjc326 on August 06, 2014, 02:46:26 AM

Quote from: cloverme on August 05, 2014, 09:46:54 PM

Quote from: mylo91 on August 05, 2014, 09:22:05 PM

Alright then I'll change the harware. Let's say the Antiminer S3 which costs around 300 euros with the actual value ot the BTC (0.68 btc=294.77 eur)
So again let's say I have a budget of about 8000 which means I could buy around 26 antiminers which would give me about 11.4 TH/s and a consumption of about 8840 watt. What would you reply with this hardware and consumption using the antiminer. What would be the answer to the original questions? Thank you for the replies!!

Oh one more thing. the antiminer is only bought with BTC so I was thinking about buying the required BTCs with the euros which is now traded for 433.7 .

A few things to keep in mind...
1) Don't forget power supplies, you're going to need to buy power supplies to power these units. I run every 4 antminer S3's on a single EVGA SuperNOVA 1600 G2.
2) Networking and other infrastructure. Network cables, power cables, power distribution strips, and a network switch.

For that kind of volume, try contacting bitmain before you order. If you're in a hurry, order a few and wait for the coupon's to get added to your account then apply the coupon for additional discounts.

Back of the napkin math, you're going to make 0.3 BTC per day, so you're looking at an ROI around 80-90 days (roughly).

Doesn't the difficulty go up sooner than 80-90 days? I always figured it was really hard to figure out ROI for the future without factoring in difficulty increases.

Difficulty goes up or down after a set number of blocks, not days - it happens to be 2016. If the network is growing then the 2016 gets processed faster and instead of taking 14 days it takes less, lately about every 11-12 days.

What he was saying is even with the adjustments figured in you would earn you money back in 80-90 days with those assumptions. The problem with mining is you have to make assumptions. If the machine fails and needs an RMA, if the miner gets delivered late, if the difficulty goes up slower or faster those all alter the outcome.