each machine is different
people keep telling you that it does not matter at these numbers (OK, you will have 0.001% error instead of 0.0001% error).
Pool's luck will literally have 1000-10000X larger effect on your hashing.

OP wants to be below 700w and with 0.67 he will probably be above 700w.
It is also interesting that OP has 85C on all four of his loops-this is unusual, maybe going to auto (from fan 10) is warranted.
I did not notice what is his ambient temp.

theoretically, but each machine has a "character', some better, some a little worse.
try this: limit power to each loop to 160w, then play with voltage (min and max)-this would be unique and different for your machine. let machine to adjust iself overnight or at least several hours as initially readings would be slightly lower.
For one machine I have:
Starting voltage:
0.64
0.64
0.639
0.639
max: 0.649

with fan 10 I get 1225-1231GH at 683w

I like the post on reddit (don't have it handy, quote from memory).
The guy is 37, aiming for 42 coins this summer, plans to sell 1 BTC each year on his birthday, starting in the summer of 2016, just as we have another reward halving.
He will sell out by his 81 birthday in 2058.

this seems to be a bit low on hash for 700W

He put it on ebay and it is up to $445(with shipping) right now with 30hr to go.
prices on ebay (buy it now-only four visible): $490, 495, 525 and 680 (from canada)

So, I guess the bargain days on SP20 are over  .

EDIT: haha, somebody (presumably from here) snatched it as it is no longer listed on ebay

was it? LOL

seriously, though, perhaps heater and definitely router are the best candidates, IMHO, unless some home improvement solar panel/miner combo is possible (at least for sunny states).


real threat is from Bitfury and KnC, which are deploying massive amounts of hashing in secret, not from Chinese manufacturers who were actually selling a lot of equipment to us, home miners.

I posted response to something similar in SPT thread and repost here;

I totally agree. Who would invest in bitcoin knowing that 3-4 monopolists can move the price tenfold down just trying to crush each other. Or, how about making transaction cost moving from 2c to $2? Apple is doing pretty good with mass produced $200-500 devices. We just need to find either second use (heat, of course) or other application (in dual use device).

I totally agree. If you just buy BTC and then Bitfury would want to crush KnC or vice versa by dropping the price, thereby crushing the value of my BTC 'investment', then it would be stupid to have such investment in the first place.

For mass consumption, space heaters is one possibility, second is, perhaps, routers. Everyone uses a router. Why not add low power hashing chip(s) to it?
Third-refrigerator. It releases a bit of heat already, so why not a bit more while hashing.

my understanding is that 0.00 is is actually an interval between >-0.01; <+0.01, and even for this interval the award should have been roughly 10-12X from a statistical point of view.

The probability of it being exactly +/-0.00X with X being less than 5, rounded to 0.00 IS smaller still (about 1/25 of each other interval).

Where have you seen S2 for 0.2BTC? It is selling for $250-300 on Ebay.

Could be a very astute observation. If any of the state actors would suddenly want to mine bitcoin, they will sweep the slate clean and there will be almost no miners for sale.

paypal is OK, i PM'ed you re price.

people would be very interested at BTC=$500 and would tear it from your hands with BTC at >=$600
Good timing, perhaps, if BTC will surge on some news.

Just to help-want my noctua and scythe fans? i sold my s5 without them, so i have them lying around now (two noctua and two Scythe's).
Noctua 3000 for push+Scythe for pull work at setting 350 producing 1150GH with much less noise (as long as ambient is below 30C). I have hashing records.

yep, not a truly independent testing
http://en.wikipedia.org/wiki/Energy_Catalyzer

From the marketing perspective-most people in US will not go for it (sharing small %).
It's just not in our DNA (although i am not a native, but as they say in Texas-I was born elsewhere, but got here as soon as i could).
Besides, i seriously doubt that the big iron is the way to go. We went through this in computers, and it is clearly not the most efficient way.
I don't know what will be a winning combo: maybe heaters that could mine; maybe miners that could do other things, like trading stuff between each other; maybe 3D printers that could mine when not in use or internet/wireless routers that could mine. Dual purpose with low energy chips.

A couple of things that SPT did not address:
1. Is this miner based on 28nm or 16nm (I assume 28nm)?
2. What real life energy efficiency it will have?
3. Although it is probably FUD as far as speed of actual machines being produced is concerned, competitors are claiming the tapeout of 16nm 0.07w/Gh chip. Even assuming that it will result in 0.1Gh/w, it is still 10Th/1000w. I fail to see the urgent need for a 16kw machine that would be difficult to deploy.

SP20e sold, EVGA is sold as well accept bids for EVGA 1300

: the last ONE of two that were initially for sale two great SP20E machines that were for most time downclocked, but tested at regular speed.
New price: 1.71 BTC (currently $499), shipped to US (at a discount to the prevalent ebay price of $600-715). Can ship to Canada with everything over $20 in shipment cost added (as extra). Machines were stationed in an air conditioned environment.

Since SP20 is now discontinued, I consider it a collection product with the price STILL similar to the final SPT price ($479+shipping) when bitcoin was 35% lower.

S5 is $416 $466 shipped, available only on March 30, two weeks away.
As a result, todays fair value of S5 is ~$450 and SP20E fair value is at least 20-30% higher due to its higher speed (at least 1.5TH is easily achievable, maybe up to 1.6-1.65TH), ease of customization, unavailability, etc. I am selling at a discount to that.

1.71BTC/$499


Sold as well EVGA 1300 in perfect shape (used for a few months), $135 (now 0.47BTC), shipped to US.

OT: Hey, is Eligius off? I don't see the web site and miners switched over.

KnC 20nm machine was grossly overpriced, 6 mo preorder and than 1-2 mo late. By the time it finally came out, it did not matter that much because there were comparable and much less expensive machines from Spond and Bitmain.
I expect pretty much the same story-a lot of hype and than mediocre implementation or none as far as consumer side is concerned.