so basically youre talking geothermal. hope youre aware of the length of pipe youll need, my 3 ton geothermal unit (A/C, heat, preheat for DHW) needs 2000 feet of pipe buried 5 feet down, although since its for heating also it takes more pipe as it needs to pump more heat around for heating the house and DHW. heating around here takes more exchange area than straight cooling as the max temp difference is greater. IE 10 F outside to 72 inside in heat mode vs 100 F outside to 72 inside in cooling mode.

maybe 1/2 the pipe? 1000 feet call it?

I wondered when that snuck in (compiled from git yesterday). best share so far 104k.

been running great under windows vista/7 so far.

Thanks!

EDIT: say, what does "rejected <hash, stats etc> job '57f7' not found" mean?

got a generator that will run the house, but I wont waste fuel to mine. I went 1 week without power last october storm and my fuel reserve does not last forever, especially when no gas stations within 60 miles can pump it because they have no power either

it goes towards heating, well pump, refrigeration and computers in power sipping mode.

so count 1.7 GH/s down if the powers out.

northeast USA here, they say we will get hammered pretty good where I am.

ok, so dont use the credit. it will just be a longer time for payback.

do it anyway. its clean, very even heating/cooling. and (can be) maintained to 1 degree F at all times, you dont have to use timers to setback temps at night or whatever, although you can. its generally most efficient to leave the house @ 70 F [or whatever] day and night.

as a bonus, your mining waste heat will be used to preheat your hot water in the summer when cooling your house.

we figure our geothermal system will have payed for itself in 5-7 years.

EDIT: thats the combined savings on air conditioning, hot water and heat, all which are geothermal now.

http://www.energystar.gov/index.cfm?c=tax_credits.tx_index.

30 percent federal tax credit for geothermal right now.

thats not what my geothermal system is. it is a closed loop: 2000 feet of pipe with antifreeze in it, buried 5 feet down in my back yard.

ground temp  5 feet down is around 50F year round in my area (northeast USA), and my system dumps heat into it in the summer, and draws heat from it in the winter.

as a bonus, when cooling my house some of the heat removed is used to preheat my hot water (desuperheater). so last summer my waste heat from the miners actually was used to heat hot water. slick.

I have geothermal, although technically its a ground sourced heat pump. its very efficient - 400% is the ballpark, but Id have to find the papers to be sure. but as superfastkyle pointed out if the ducts (distribution system) are not well done (like uninsulated pipes/ducts running outside the living space) you lose a  lot. I had new ducts run and they are insulated beyond belief.

last year I heated with oil (expensive in the US, getting near to heating with pure electric) and a 25 years old furnace and uninsulated pipes. efficiency wise, my waste heat from mining was pretty close to what my old furnace put out. this years its about 25% efficient compared to my geothermal unit. I heat with dirt now.

p_shep
death and taxes

+1, its what I use now (was MX2) and what I put on my single. made a 2-3 C difference. the original paste was gray and very thick (almost clumped) BTW.

the springs on a singles heatsink are pretty weak, so a thinner paste should be better. or at least easier to apply correctly.

family does indeed come 1st. take the time you need, and I hope things work out for the best.

Ill give it a go.

running it now on an XP machine with a 5830 and a BFL single. also have miner.php loaded for monitoring it.

ouch. is that what youre running now?

what is your ambient temp? have you cleaned the single of any dust build up? maybe redo the thermal paste? run it without the side cover?

all else fails, run a lower speed bitstream, it will give a higher long term hash rate.

they seem to, but you can also query cgminer via its API and get an official "overheat" count to be sure you dont miss any.

I did try autotune. it seems too conservative for me, always went one speed step down from what I could actually run it at without throttles.


that tracks with what Im seeing too. 880 bitstream runs 40-42 C with no throttles according to anubis and miner.php. tried the 896 bitstream and within one minute it throttled @ 40 C.

and threads I saw that mentioned running in the 50s C were usually running lower than stock speeds.

Ive noticed a lot of singles running in the mid to high 50's C. apparently without throttling. but mine throttles around 45 C.

so here are my questions. anyone know where the temp is read on a single? an average of the 2 chips? one chip? somewhere else on the board? what triggers the throttle? hardware errors? an internal temp thats not reported?

background: ambient 70 F (my basement).  originally I ran the 832 bitstream with no problems @ 44 C, but the 864 would throttle withing minutes, even with the temp never getting above 46. so.. I redid the paste with AC MX4 (the stock paste job was horrible, almost lumpy on one chip, and not much coverage on the other) and got a 2-3 degree C drop. loaded the 864 bitstream and it would run about 15 minutes and throttle, with the temp never getting about 43-44 C.

so

upshot is I now run it with a 140 mm fan against it and no sides and it runs at 40-42 with the 864  880 bitstream and no issues.

just curious, mainly.

took the survey.

one problem is on the 1st couple questions I chose "other" and typed in the text box. but it still wanted me to choose one of the other answers (check a box).

"other" needs a check box so it can be a stand alone answer.

6/24/2012  1851  N  1  0  0  -  -  vapourminer

1 bfl single

ordered      6/20/12 
confirmed   6/26/12
shipped      8/15/12
received     8/17/12
59 days, depending on how you figure it

6/20/12    1    8/17/12    59     vapourminer