Income of what exactly? Bitcoins or USD?

If you're on deepbit I'd say that's almost impossible, there was a period of unluckiness that deepbit hit, where the 24hr average block time was 23 minutes per block, right now it's 15 minutes per block (with 400Ghash/sec less).

Just a rough calculation there would suggest 1Ghash @ 23minutes / block (2300GHash)= 1.36BTC / day
while 1GHash @ 15minutes / block (1900Ghash) = 2.53BTC. Pretty sizable variation.
EDIT: 1Ghash @ 15minutes / block (3300Ghash) = 1.45BTC/day.

Not to mention before the difficulty jump total GHash was about 1900, then it went up to 2400ish, which would drop your payouts even at constant block generation.

If you're meaning USD then yes that could be true. You lose BTC generation but gain BTC value.

EDIT: Holy crap deepbit is 3300GHash/sec, I must be tired and reading wrong.

What the crap are you talking about? 100mA can stop your heart. Why would people go around being electrocuted by a car battery? I turn my car on with a key, not by shorting the leads with my body.

And yes, PSUs are transformers, at least functionally and they incorporate transformers as well as power switches. As I said they are complex creations and not to be made at home.

Here is a look inside a high grade high watt power supply:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=189

Not to be a jerk, but that sounds like a really good way to kill yourself. Playing with 10+ amps is not a good idea.

Yes PSUs are transformers, but they're also filters and some other stuff.

Is anyone else seeing round duration displayed incorrectly?

I keep seeing it as 1:57:00 + some time or so.

Ok, well I guess if a webpage said it then it must be true.

That doesn't tell me WHERE you got 1623.67 from. You could have just said "83498934" for all that tells me.

Just for fun I'll show you what I mean:

4x 5830s = ~4*285 (you may get more, you may get less, this is a reasonable average) = 1140MHash/sec.
1140MHash/sec = ฿2.02 /day on a low variance, 0% fee pool with average luck. I'm going with averages here, so let's go with that.

Next difficulty increase is in ~6days, so 6days * 2.02BTC/day = 12.12BTC (if you started mining RIGHT NOW, this is optimistic as you dont even have the equipment yet)
Next difficulty projected @ 733627 (likely to be higher but this is what we have now)

1140MHash/sec @ 733627 = 1.56BTC / day
1.56BTC /day * 10 days (avg time @ difficulty lately) = 15.6 BTC

Next difficulty could be whatever, lets go with 30% again
1140Mhash/sec @ 953715 = 1.2BTC /day x 10 days = 12BTC

12.1 + 15.6 + 12 = 39.6 for a 26 day window (close enough to a month). Assuming coins to be @ $35/coin (could be more, could be less) x 40 coins = $1400. If coins are $45 you make $1800 if coins are $5 you make $200.

This is an optimistic guess assuming lots of stuff goes your way and you can your rig up and running today but it can give you a feel for your diminishing profits and variability based on coin price.

Unless you are using an adapter cable you will have to physically saw open the x1 slot. That will probably degrade the resale value of your motherboard.

^ So what?

Where do you get these numbers from?

Assuming you invested $1000 in a rig and managed to somehow get 4x 5850s (they're hard to find) and managed to get it up and running this instant you'd only have 6 days left at this difficulty level, or 13.8 BTC (assuming you hopped on a lucky 0% fee pool). Next difficulty is going up about 30% (probably more) so you'll see a 75% rate of coins for the next 10-12 days. Depending on how many more people jump on board difficulty will go up again.

Bitcoin prices might rise, they might fall, who knows. There are no guarantees in this game.

http://www.nextdaypc.com/main/products/details.aspx?PID=A591292&rsmainid=ND0130014

449 left. Go.

How is newegg any more major a retailer than nextdaypc? They're basically warehouses of computer parts with website fronts. THe link I posted has 449 5830s, they're not some mom and pop store.

 Go, buy!

*sigh* There are no supply issues of any kind. 5830s can still be found with relative ease. 6870s are in great abundance, 6950s while not great are also in abundance. The used card market is still flush with cards to be found. Bitcoin is a tiny tiny tiny fraction of the GPU market and is not constrained by GPUs. It is constrained by how tiny it is.

But it is growing, and quickly relative to its size. However one nice thing is that as it grows larger the rate of its increase is proportionally smaller (its nice for us miners). That is to say, if you have a 2THash/sec network and you grow to 4THash that's a doubling, but if you then grow to 6THash, that's only a 50% increase. Unless we see a repeated doubling of the bitcoin user base "The sky is the limit" is not really apropos for bitcoin.

5830s are not out of stock. I just posted in another thread a stash of 449 5830s. They're a little more expensive but still a better MHash/$ buy than a 6950.

http://www.nextdaypc.com/main/products/details.aspx?PID=A591292&rsmainid=ND0130014

0 have been bought since I posted.

Come on bitcoin, show me your buying powahs.

The card runs its memory at 300MHz when it is idle as a powersaving feature. You are merely forcing it to run its memory at its idle clocks since it is actually idle.

285 is more typical 300 is if you're lucky.

300Mhash / $150 = 2MHash/$, not terrible, but not great for the Mhash/W. Good if you're desperate to expand that farm

EDIT:  I keep hearing about the massive buying power of the bitcoin community...

http://www.nextdaypc.com/main/products/details.aspx?PID=A591292&rsmainid=ND0130014

449 5830s in stock. Sell them out by tonight!

They are actually the opposite of this statement. A $700 dollar card (usually more) that puts out 800MHash/sec (often less) is $1.14 / MHash. A 5830 is about $2.85 / MHash.

Even factoring in stuffing 8 GPUs onto a single motherboard usually doesn't even out the cost ratio.

Or maybe a forum like my little ponies called "My first post" for those whose first contribution is the same grandiose sounding doom and gloom analysis post.

No. Useful cards are double slot beasts. If you put 1 slot of space between each card you would be 9 + 22 = 11 slots on a case. The average case has 7 slots.

You can buy a http://www.newegg.com/Product/Product.aspx?Item=N82E16811112327 that's about the cheapest 11 slot case I know.

Otherwise look to custom builds. Wood / L-Beams, etc.

He is saying you will not get 2BTC per day with 55MHash/second. And he's right.

His math is a little optimistic. Use: http://www.alloscomp.com/bitcoin/calculator.php

On average you would get about .1BTC / day. Or 1.5Euros