Topic: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 20. (Read 69365 times)

According to Jim above's volt mod experience S2 are still much better for power consumption for not much more BTC which i foresee batch 3 to be priced around $3000.

1000gh / 165 = 6.061 x 277 wall watts = 1678 watts

6.061 x S1's = 5.41 BTC

Now add the cost of all the power supplies needed for 6 x S1's and the S2 batch 3 will clearly be the smarter option by far.

Well even if may void guarantee....

The guy is a genius.

Congrats

Good to know.  This mod makes the S1s theoretically cheaper per Ghash than the S2 without sacrificing much power consumption.

We need only the pencil?

awsome mod.

I applied it and set the clock at 325.   

165 Gh pulling 277watts at the wall

normally 190gh pulls 380watts

Yeah, I just vmodded one of my '14 units to around 1.15-1.16v per 'module'
Its doing 431mhz @ .55% HW @ 219.5GH for the last 4hrs ... =)
(previously the same unit has been at 425mhz @ .18% HW @ 216GH for a few days...)

I may try it on my other 2 '14 units tonight.

My '13 units dont vmod as well =/

NOTE: no, didnt modify cooling and this particular ant is running at an avg of 44C

The same as I did but with the resistor R12 (the one at the left of R3).

It will increase the voltage at the chip, so be carefull

thats very good - i did not expect them to be capable of much more than 205GH even with pencil mod. did you have to add a second fan or shrouding at all?

Holly!

We need some explanation here!

meanwhile, I did the opposite mod and am pushing near 220GH out of some of my ants ... =) hope they dont die! ... been a week or so ... still goin strong.

https://tradeblock.com/mining/a/e2b6bd9a70

Try playing with different numbers on there.

I've got to say, I'd be really interested in knowing what kind of math people are using to try and make the mining thing work.

Looking at the prices of the 1 and 2 TH units that are coming out - and running that thru one of the mining calculators - I'm really at a loss to see where anybody is ever going to make the money back on those units.

Even looking at another example:  the cost of an S1 right now - which is ~ $446.50  ( ~$500 per BTC X .893BTC on Bitmain) - and then plug that into one of the calculators - and what I get at the current difficulty level - is 54 days to pay the machine off.

If I plug in the estimated next difficulty level of 6,085,479,004 - that goes up to 69 days, and even that is not bringing into account subsequent difficulty level increases.

Just throw in 8,085,479,004 (because I don't feel like trying to calculate where the higher difficulty levels will actually come out) - and you're talking 100 days to pay the machine off.

I gotta say I'm beginning to see the viewpoint of all the people who are saying that the mining thing is just a losing game.  The numbers simply don't work.

Granted - all the above numbers are based on the current BTC price.

But even if I bump the BTC price up to $700 - that last calc of 100 days only goes back down to 65 days (all other factors being equal)

Well done! Good news!

for information, the mod is stable for 4 days !

+1.  I thought you were crazy enough to underclock your farm today - doing it in a month from now would be much more reasonable (though you might have better luck selling the hardware to buy 28nm gear at that point in time)

Sometimes, I forgot that I don't have to argue with people who agree with my standpoint.

^in a month or two time is a different story. my point was just that switching today would be a bad decision with regards to profitability.

We're getting ready to UC/UV, not so that we can convert our entire farm over now, but so that we can prep for the future.

My math says that with the current price, it's worth it to OC until the diff reaches somewhere around 150PH/s. After that, it's more profitable to UV.

When that time comes, Ant S1s won't be worth 0.938BTC. They'll be worth a fraction of that. If I bring up that 5->7 Ant scenario again, but this time it only costs me 0.25BTC/Ant to upgrade, it'll only cost me 0.5BTC ($280 USD) to save me $90 USD/month in power. That's worth it to me!