I live in a cold place, heating won't be an issue until mid-june at the earliest.  If anything, I "save" on the heating bill

Also, I tend to run driver combos that let me game on this machine.  My primary miner is a 4x6970 machine (running 3x now because apparently the motherboard likes to burn up at the pcie power plug...2 cables up in smoke so far)

Although I must admit 12.3 are shit for BF2, I get crashes about every hour on average while 11.11 were perfect (up until a week ago, when it started flickering like crazy...sigh)

i'm running 12.3 with latest sdk and I oc at 950/1200 (bios mod) for gaming (watercooled, never above 37c) and if I downclock the memory to 300, I save around 50-60watts (which I honestly can't say I care about since I got a fixed rent which includes electricity).  at 1200mhz memory, I get between 770-820 mh/s on the pool management software, while I don't know how much lower I'd get at 300mhz memory.  That's on CGMiner 2.3.1-2 and phatk.

is there a chance the FAQ can be extended to detail the trading front-end?  So far, it seems like there's not much documentation available.

i.e. "I have no clue and should stop posting"

thanks for getting there on your own.

let's just do a reality check...

1$ trade means this fee:
1$ * 0.65% = 0.0065$

If I do 2 trades for half a dollar each, I traded a full dollar:
1$ = 0.5$ + 0.5$

and paid the same fee on both half's:
0.5$ * 0.65% = 0.00325$

which results in exactly the same total fee:
0.00325$ + 0.00325$ = 0.0065$

So no, you wouldn't do lots of small trades for that reason.

very interesting discussion going on here, will keep reading

you need to get someone who knows how to use a spellchecker to go through those slides, it hurts my eyes.

Art imitating life or life imitating art?

same deal here, websocket seems to be a problem right now for mtgox.

shush you funny person, the more you talk about how you make money, the less money there is to be made that way...

In plain english:

"I know nothing and would like to make money based on some half-baked idea I have.  Also, I have no skills that can potentially add value to this project so instead I will be managing the things I don't understand."

I like your spirit.  I can't decide if I'm being trolled by someone really clever who's trying to expose corporate america or if you somehow are your own joke.

so I'm guessing some folks decided to manipulate the market and move large sums around?

That's not quite true.  The 6990s pay themselves back just as quickly, have a higher production/watts metric and can give you a higher rack density if you're living in a country where rent is comparatively more expensive than electricity

Also, the 6950 that can be converted into 6970s got sold out something like 10 billion years ago when everybody and their grandma heard about how they could save 150$ on their video cards.  The newer 6950s can't be made into 6970s anymore.  If you were to buy new cards, you basically can't find 5870/5970s anymore so you have to move back to either 6870s in some kind of optimized setup or you spend more and get 69-5/7/9-0's.

models suck if the assumptions are not valid!

in your case, these are the issues I see after a quick glance:

-no model for fluctuation of BTC prices
-assume exponential growth of total network hashing power for the next 40 increases
-difficulty increase is not based on a model for expected hashing power but rather on a static +50% increase
-no link between price of BTC and difficulty
-where is the time period?  39 difficulty increases is more than a year's worth of mining...

so I was playing with those numbers and modified them slightly to account for overclocked cards and for canadian dollars (all prices are pre-tax/shipping, retail and available only).

Card table               
card   price $CAD   power (watts)   mh/s   mh/s / $   mh/s / w
5770    $90.09    108   215   2.39   1.99
5830    $129.75    195   300   2.31   1.54
5850    $189.86    200   350   1.84   1.75
5870    $262.49    210   420   1.60   2.00
6750    $114.99    100   165   1.43   1.65
6770    $107.49    120   195   1.81   1.63
6850    $149.99    175   230   1.53   1.31
6870    $160.12    175   310   1.94   1.77
6950    $244.79    220   360   1.47   1.64
6970    $329.99    250   400   1.21   1.60
6990    $745.00    475   800   1.07   1.68


Seems to me that the best deals in terms of performance/$ are: 5770, 5830, 6870.
In terms of performance/watts: 5870, 5770, 6870.

When looking at the best performer overall: 6990, 5870, 6970

Now finding a bunch of 5870s in Canada is a PITA and is most likely done through the used market (where the prices are even better!)

I've been mining on a 5970/5870 trifire setup, overclocked 950/1200 and 900/1200, respectively.  I have been using poclbm through GUIMiner and with the recent release of the phoenix/phatk kernel for that frontend, I wanted to give it a try.  Here is a screenshot that I'd like explained:

http://img823.imageshack.us/img823/7885/stales.th.png

You can see that there's a large difference between the stales produced by each kernels.

Here are my custom arguments:


-v -w 128 -f 1 (poclbm)
-k phatk AGGRESSION=19 WORKSIZE=128 BFI_INT VECTORS FASTLOOP=false (phoenix)

Poclbm produces something like 397/395/379 mh/s while phoenix is closer to 404/405/387 mh/s.

So, basically, my question is why does poclbm produces about 0.85% stales (on deepbit) over 200k stales while phoenix is closer to 2-4%?

While we figure this one out, I'll keep using poclbm.  3% higher rate is not worth 3% higher stales.

I don't think that it shows anything else than the shallowness of the market...

With more overall money invested in bitcoins, it'll be comparatively "harder" to make a mark in the global market for a single trader.

alternatively to the sampron 140, you can get a x2 250 for about 60$.

I've been buying them used for 210$CAD per 5870.  If you buy in bulk, that's close to what you should pay.  Where are you located?  I'm interested in buying a few dozens of discounted 5870 myself!

I don't think we're quite at "global collapse" just yet.  Just don't jump from any bridges yet, ok?