That may have been at the voltage of the tube, but i beleive the prismatic is undervolt ed a bit, which means much higher amperage for the same wattage.

Capital is capital, its not a running cost. But yeah, setting up a space for 100kW means about $5,000-15,000 in electrical work and cable runs, plus $2,000-20,000 for a cooling soluton (air cooling is the cheapest)

assuming 0.7W is fair i think, since the 1w/GH gear wil very soon be balanced with 0.5w/GH, and most manufacturers are now at 0.7w/gh. 

I would say that at this point in the game a 100TH farm in china (lower costs and wages) could be started up and over the salaries of two people while being profitable. In North America, you might need closer to 200TH due to the extra $15,000 year of a base salary and typically higher $/sqft for industrial space.


some basic math i did looks like 2 people with access to a suitable location costing $1200/month and needing $20,000 for setup  could distribute the cost across 4 years and pay themselves a small (~30k each) salary for a 100kW/100TH farm at a cost around $30/month  (a 2yr period is a cost around $50/month) Thats roughly equal to 0.05-0.08/kwh

price? Is S2 part of the larger assembly process and thus more reasonably priced? I can't honestly pay anything over 3BTC shipped if it uses 1400W

maybe not 50%, but I do know they get very hot, must be losing up to 10% power over the regulator and another 5% on the inductor. It also looks like theres a few extra chips. Couple all these things together and theres definitely potential to trim some power draw in comparison to the previously high-volted, overclocked chips

I mean, cmon. read the thread. USPS, zipcode, mentions that shipping to EU means overseas, gave prices for US shipping.

cost isnt represented in w/GH...

1000sqft facility with access to 100kW = $800-2000/month
internet = $100/month
2 guys who can spend average of 100hrs/month installs and maintenance = $2000-5000/month
using 0.7w/GH equipment, add 10% for PSU losses and 10% for air-cooling (no large farm would use closed AC) = <1w/GH = ~100TH capacity

so 100TH will cost 100kW + $2900-6000 per month.  ($3-$6/kw/month when distributed)
power in some locations suited for this is about $0.05-0.10/kwh or, or $35-$70/kw/month.

thus, a large location with well-priced power could have operation costs of $40-$75/TH/kW/month. In comparison mining at home with $0.15/kwh will cost about $105/month not including any rent/salary/internet/maintenance


EDIT: same math but for a 25kW capacity only would be about $50-$95/month

seems obvious its from the USA. that guy posting about it being a zip code for paris was just an idiot

i chose the third option because this sort of thread is dumb and not belonging in hardware.

tl;dr - this thread belongs in the subforum dedicated to bitching about other users (there is actually one)

he just said his splitters work fine... and they should. 6pin->6pin splitters are totally fine to use.

please note that these 18awg ebay splitters are often mediocre quality - 100W per split shouldnt be an issue, but if you tried it on a un-modded S1 or S3 you would likely melt the wires and start a fire at >150w per side of the splitter, or the combined >250W on the primary PCIe cable

looks like an entire chain is down. try checking the voltage if you have access to a multimeter - its likely the DC/DC regulator for the first chip in the series isnt fuctioning (should see 0.7V across the large grey cube-like inductor) and as a result the entire chain does not function.

check if there are any damaged resistors or missing bits

looks like shipping to Canada is about 1/$105 or 2/$160, does that sound correct?

any idea when this would actually ship? Im really interested in getting 1 or two units. would definitely need the BE controller but would also like to have the USB dongle since i have an RPi already (kept as backup for existing gear)

I don't think dogie is totally wrong, you *can* find air cooling that handles 350W but as I showed above its often large, top-heavy monstrosities that cost as much as a liquid-cooling solution. That windforce one you mentioned is for GPU so doesnt make much sense in this regard.

IMO, dogie is 90% right - cluster the chips and place mounting holes for common CPU heatsinks. Let the buyer go and get a decent liquid-cooling system from thier local market and most of those can easily take 300-400W TDP for a fair price and small footprint. Additionally, they can be salvaged and used on other equipment in 12 months from now when the HEX4RB is no longer profitable. (or if the HEX4RB underclocks to ~200W TDP in 6mos from now it can be swapped for a more tame air cooler)

if you are in UK you should have 220V power source, so 18awg is just fine

is that the stringing to run them off 12V without massive losses on the DC/DC converters?

250W TDP at 26dB  (huge, using 2 120mm fans) http://www.bequiet.com/en/cpucooler/482
350W TDP http://www.techpowerup.com/141811/zalman-announces-cnps11x-extreme-cpu-cooler.html

IMO the only fan/heatsink coolers that can handle such wattage are massive monstrosities that almost certainly cannot be shipped mounted or they will snap the PCB/mounts, and would require a big open case to offer the airflow. Closed-loop liquid cooling seems like the obvious winner

I got B1 (4.75) and B2 (4.25) S1 units and they were perfect. Mined about 6.5 and 6btc respectively, and resold for almost the electricity costs of the entire time running them.

THIS.
1) the thing has a cd-drive. its clearly not meant for bitcoins
2) that custom stand/case is probably worth $2000 and probably almost as much to ship. Its clearly a one-off and not viable in mass production

Noone is (or should be) taking this seriously.

would this same USB dongle work for running S1 blades? (theres a thread dedicated to running them on an RPi)

Any plans for a more efficient design, similar to the improvements implemented in the asicminer prisma? Doubling the chip density could get ~600gh/450w per miner, and improvements like this are necessary with the rising difficulty. >1w/gh is no longer a good buy for most people paying >$0.10/kwh

Not really - thats how coupons have worked ever since the start. $200 is a fair coupon, but imo the price is too high for the power draw.

If this was drawing 1000-1100w I would buy it at the price, but 1400w is too much.

With the s2 they basically doubled the number of chips to drive each at a more efficient voltage. But with the s4 it looks like 5xS3 worth of chips with only a marginal savings to power consumption. Hopefully they will bring out a revised design that uses 7xS3 worth of chips to achieve 0.5w/gh.

I might buy 1 with a coupon just because I have been selling more hardware then I've been buying, but it's going to take a serious slowdown in the difficulty (7-10% jumps) for the next several months if this is going to bring a positive return.