Since people were saying this is not some kind of experiment, and a lot of nonsense was being posted, even claimed they could break even... I decided to digg a little bit deeper.
I have to admit, i was a bit lazy, so i used this post to get the formula daily revenue:
https://bitcointalksearch.org/topic/m.8221939Daily revenue = H x 25 x 600 x 65535 / 248 / D x 6 x 24
Offcourse, the block reward dropped to 12.5, so we have to exchange 25 to 12.5 in the above formula
So, the revenue = the hashrate (H/s) * 491512500 / 281474976710656 / Difficulty * 144
If we use this formula to calculate the dayly revenue of an antminer S9:
1.4e+13 * 491512500 / 281474976710656 / 1103400932964* 144 = 0.00319045009
coinwarz is a pretty reliable mining calculator used by lot of people, at this moment, it reports a dayly revenue of 0.00319050. I think this proves the formula is relatively correct.
abhinav_thakur01 reported a hashrate of 1-2 H/s
My hashrate is showing around 1-2 H/s . Hashes solved increasing but is the total mining income updated per hour ?
Plug 2 H/s into the above formula:
2 * 491512500 / 281474976710656 / 1103400932964* 144 = 4.56 e-16 = 0.0000000000000005 BTC/day = 0.00000005 satoshi's/day =
you'll need to mine over 50.000 years to mine a single satoshi at a speed of 2 hashes per second.If we re-read TheQuin's statement, and combine it with abhinav_thakur01 speed report, then plug everything into coinwarz with a 10 cent/kwu power cost
--snip--
I measured an 8.5w increase in CPU power
--snip--
linkWe see that the net loss of such a mining operation would be ~$7/year, simply because (luckily) the power draw was only 8.5 watt. The net loss is calculated this way: the income of your mining is 0 (nill, nothing, zip) minus the power costs (~$7/year) gives a net loss of ~$7/year.
A re-state my previous theories about freebitco.in browser mining... i'm pretty sure one of these theories (or a combination of these theories) is the correct one:
- OR they're not bitcoin mining like they claim, but mine a coin that is still cpu-only minable, but still pay you in BTC
- OR they're performing some other task in the background... Don't know which one tough
- OR they just use the browser mining as a trick to keep you on their page... They subsidise your account for staying with them 24/7, watching adds
And as a final wacko theory i wanted to add this link:
http://www.csl.mete.metu.edu.tr/Electromigration/emig.htmIt's an interesting read for everybody that claims there is no harm at running your cpu at 100% for long times (or overclocking your cpu).
I know it's not completely on-topic, but it's still interesting nonetheless