doesn't help me. i can't even get out of my house. i suppose this is meant for 1st or 2nd level geeks, not 3rd level geeks like me.

lol. he has made a very good point, though. you take NO risk.

sorry, double post

how much would a 25Ghash/s 3month contract cost? i've simulated the price which a serious server housing company would take for this. 4x 16 amps 230V, 1x 40HE rack incl. 16kW cooling and security.

at 180 eur per 6950 which produce about 400Mhash/s each, it's 540eur for 1.2Ghash/s plus another 250 eur for psu+board+cpu+ram. 800 eur for the rig. it consumes about 700W, which is 1500kWh for running it for 3 months. we pay 0.23 eur per kWh (VERY different in the united states, at about 7-8 eurocents). so the rig including running it for 3 months costs 1150 eur. that's 1550 AUD. if you pay 8 eurocents per kWh, that's just a little bit more than 1200 AUD. oh - and it's 1.2Ghash/s, that's even more than 1.

edit: imagine 6 months.

this service is too expensive for anyone who wants to buy just 1-3 Ghash/s. because you can easily set them up at home without having to worry about anything. it becomes a different matter when we're talking about 4+ rigs, which is rather complicated to setup and maintain. you can't just have them stand in your basement without additional cooling. that's when i would want to find a service which houses my computers at a decent cost.

i don't need to do any research to understand that these services are basically some people desperately trying to make some money without having to worry about anything. there's just no reason to sell mining power. if it was profitable for your customers, why wouldn't you do it yourself? because there's a risk which you don't want to take. you throw this risk at your customers and are safe yourself, because you have already been paid. this in itself is wrong, considering these prices it's even worse.

i've already said this in vladimir's thread. for 1200AUD you can get a 6990 and a 6950 which produce more than 1Ghash/s, keep them running for 3 months(electricity cost) and you can even keep the cards. if you're interested in the btc economy itself, read some post above mine, someone said that buying the coins directly would be the way to go. this "contract" is scam. anyone who buys it needs some serious treatment.


that's the only cool part, but i doubt they'd actually do it for decent prices.

edit

lol.

you can flash your dualbios cards with as much crap as you want. just keep your original bios file and don't flash the 2nd bios (i think it's not even possible). when you failed, boot up with 2nd bios, prepare to run your flashing tool, change the switch to 1st bios, flash.

wow, americans are some aggressive folk. you're only talking about violence :< there have been some philosophers who thought a lot about humanity already, i'd go reading their thoughts and stop discussing this for now.

we don't get to choose, either. and we pay a lot more.

be happy you're in america. you don't want to know how much of our money in germany goes to some real parasites. you wouldn't want to pay $2.20/ltr gasoline, of which $0.95 is energy taxes and another $0.20 vat, either. you wouldn't want energy prices of about 35c/kWh. just be happy to be able to help your neighbors who actually pay taxes.

reference design is probably the best bet because the air goes straight from the card to outside the case. if i hear you speaking about 100%, i get the chills. 50% was so damn loud, i couldn't imagine going for 100%. for dedicated rigs in a different room, it's okay, but having the fans blow at 100% in the room you browse the internet is way too loud.

71%? reference design cooler?

you have to reconsider your setup. 860W producing 1272 MHash/s, that's not very efficient. my current system draws 240W and produces 385 MHash/s. it's not some cheap low power consumption cpu, either. it's an overclocked 2600k. in addition to that i use a 2nd video card for gaming etc, which is (of course in low power state) included in the 240W.


i'm not too sure about that. i didn't have thermodynamics in theoretical physics yet, but reading some wikipedia article about it, it seems that the reverse of a carnot process apply here, so the efficiency is the inverse of that of the carnot process. and iirc the carnot efficiency is not <0.5, but <1. the actual efficiency depends on the delta value of the 2 different temperatures.

250 Mhash/s is way too low. 100°C is obviously way too high, too. my cards were at 75°C (@ 55% fan) and produced a good 330 Mhash/s without any adjustments (except unlocking the shaders). enabling the power-thing in amd overdrive and overclocking to 900 MHz made me get about 385Mhash/s. that's what i'm currently running. i can't tell you much about the temperature now, though, because i've switched to watercooling (if it's your only computer at home, you'd go crazy after a few days of the fan running at 55%.)

quite true. in fact, i expect the bound to be near what we're currently at. the "most efficient operator" is probably somewhere around 20cents/kwh (incl. maintenance cost and a minimum of profit to motivate him to keep his business going).

buy 4 and ship one to me. i'll pay with 3 months of 1.1Ghash/s.

it still shows 876954.49351354 for me. is there a problem with my client? using 0.3.23.

edit: just now showed the new difficulty. sorry for this topic.

my calculator tells me it's ~14. it assumes a network speed increase of roughly 4% per day.

are these a/c's loud?


you have to do it yourself. there are some kits out there, but they usually suck (and i don't know of any which cool the gfx card). get a nice pump (eheim 1046 = great) with some 1/4" fittings, some adapters 1/4" -> whatever tube you want to use and a radiator. a cheap triple radiator is enough for 1 card + cpu. if you use a dual gpu or two or more cards, i'd recommend an expensive quad (420 or 480) or even a 9x radiator. as i've said somewhere, it's pretty easy to get quality stuff in germany from about 3 different online shops.

an estimate:

40€ pump
70€ gpu block
40€ cpu block
50€ triple radiator
20€ fittings
10€ tube
40€ high quality fans (! must be high quality, you'll regret buying low quality ones)
-------------------
270€ = ~$390

things you can add: temp sensors, bigger radiator, motherboard blocks (i highly recommend not buying these. they are way too expensive and yield no benefits). some people even cool their hdds and ram, but again, not necessary (although some hdd blocks are combined with noise dampening, really neat feature because your hdds will be the only thing you might be able to hear. i use ssd only, though).

it's pretty easy to install the components and i doubt anyone would have to deal with leakages, which many who are not familiar with watercooling are afraid of. only downside of it is the cost if you upgrade your graphics card. it's usually 70€ for each new gfx card, because they won't be compatible with the next generations. once you've switched to watercooling, especially with highend graphic cards, you probably will never want to switch back to air. you won't hear a damn thing. ever (be sure to use some good decoupling on your pump, though).