I think Smalleyster has the right idea on the spirit of this question. It's more of an idea of how efficient rigs can be or should be using these the two variables of input to output as a comparison. The point isn't to think of how good the hashrate is but how good the ratio is. It does seem like I'm on the low side, but not way out of range.

One thing that this ratio will give you is resilience to difficulty rises and/or btc value drops. The higher the ratio, the longer you can mine and remain profitable. Of course electrical rates matter here too.

How many transactions actually have collectable fees on them? I know this is supposed to supplant the reward, so I'm wondering if you are seeing any signs of this.

By my Killawatt, I'm running at 530 Watts for 800 MHps. Is this reasonable, or is this out of wack?

Maybe you could reclaim some electricity with a sterling engine hooked up to an alternator. (Probably not cost effective though)

I like the water tank idea but I'm not sure 30 gallons could retain enough heat, and since water heaters are insulated, they don't dissipate heat and the water will approach the temperature of the cards. Maybe you could have an alert that will tell you to take a shower or do a load of laundry if the cooling system isn't performing.

Also for me it's especially bad as I have a solar pre-boiler that gets the water to 76 degrees C (170 F), so the system is already being heated to at least that level.

You could loop it into a pool for extra heating there. The nice thing is that a pool a large heat sink and it has an open surface that dissipates the heat.

I don't understand "shorting" vga. What I've read says you need to use resistors in the 50-150ohm range.

Maybe I don't get something. IME when you reboot, the overclocking profile is retained. I never have to reset it.

The problem I'm having is that when I put things in startup, my network hasn't initialized and this causes the workers to hang.

I just went through this. I think everything that could possibly go wrong went wrong. Here are some things to do.

If you have a second monitor, plug it into one of the other cards and reboot. If it becomes available, you're in luck! All you need is a "dummy" plug. Use the layout here and the suggestion for Radio Shack 68ohm and pics here to make one with the VGA adapters that came with your cards. One thing though: kink the end of the resistor so that it is certain to touch the walls of the adapter. I didn't do this so my dummy plugs didn't work.

If it's not resolved, next, if there is a molex connector on the motherboard and you have a molex plugged into it, remove the plug. I don't know why but this made it so my MB would only see one card. Only use the power that plugs directly into the cards.

If that doesn't solve it, then you are in for a bit of work. First. Take out all of the cards and put them in one at a time into each slot and reboot to ensure that the slot is working. If there are any slots that don't work, you might have a defective motherboard.

After this, put in all of the cards. Install the latest drivers for your motherboard. Wipe out all ATI software and drivers using these instructions. Reinstall catalyst.

At this point it should work.

If this post helped you, please donate some btc : 1KZnfWkXXLdEjvQKYALbEsjbeWpvSG9NWB

Poker is a draw for bit coin. I believe in the liberty philosophy of bitcoin, but as a practical matter, the fact that I can play poker with real money gives it utility.

Does this support 32-bit? I'm a little dissatisfied with Windows running on my rig.

Then you're taking money from your father. Also you run into a moral hazard because once the money you are generating from bitcoin is less than the power cost, if you were paying for power, you would simply sell the rig. Here you would continue because even though it nets your family negative.

It's not really clear what card your system could handle. Does it have PCI 16x? How big is the Power Supply? Are there any PCI-E connectors. These things will help you determine if you can mine profitably. Pretty much to get any decent extra money, you would need to drop in a 6990.

No. I will say I'm a little mad at myself because It took a few iterations to make sure I had all of the right parts, so that was 1.5 weeks wasted and then I've been struggling with getting all of the cards to be recognized until today, so that was another 1.5 weeks wasted (although I had one card going, so there's that).

Still with all the mistakes, it only cost about $1 per MHps. My ROI is 6 months at this price/difficulty.

Amen. The one thing I don't like about the site is the culture. I beat people and they yell at me that I'm a bad poker player. If you think someone is bad, then just play them. They are probably just having fun while you're making money.

(note I don't think pokermon919 did this to me, but it is a common issue with the players there, calling out "fish" etc)

Payments received Thanks

Is there a 32bit kernel now?

This is exactly what happened. I didn't know the bc client changed the address like this.

Here are my firstbits : 1kznfw

I think I'm not getting something. When I put in my address, it simply said "This address is not in the chain." The address has been used for btc transfer before, so I don't understand why it's not finding it.

Note that's .01/.02 "chips" which is really .0001/.0002 btc. I still get a little messed up when I'm thinking about my bets "is this pot worth $2 or 2 cents?"

No, I was referring to the textbook definition of supply, which is the function of units offered at a given price. As the price goes up more units are offered.

People also keep thinking that the mined coins are the only supply and that they all go onto an exchange immediately and that they sell regardless of the price. All of these things aren't true. Before Mt. Gox went down, the daily volume was 8 times the mining rate, we all know that miners hoard their btc, and if the market rate goes down, a lot less people would sell. Similarly, if the cost to mine goes up, then the supply curve will move. This is very basic economics.

Sorry, but no. It's an equilibrium that sits on those three things (cost for a GH/s of mining power, price of btc in $, difficulty). What we have seen recently is price driving difficulty, but difficulty rising above a certain threshold (determined by a ratio of price and cost of GH/s) can cause rising price to cause an alignment to the ratio (because nothing in the market is making cost of GH/s lower in that ratio). This has happened clear twice as far as I've seen, and is probably happening again with the 50% increase soon.


I'm just going to quote from another post of mine where I was talking about the exchange price at $200/btc and $5/btc.

"Something to note is that there is a bit of a difference in demand in these two scenarios. People don't have a demand for btc, they have a demand for the transaction. Let's say they want to use btc to buy a spot troy oz of silver ($36.25). In the first case they need .18 btc, in the second case they need 7.25 btc. Even though the real demand is the same, the nominal demand for btc is higher when the price is lower."

People keep confusing nominal demand for real demand, and I don't get why.

And another thing, an increase in difficulty represents a relative increase in cost to the miner (in both operational and opportunity costs). An increase in costs to the supplier translates into a rightward shifting supply curve. Remember supply is btc as a function of dollars, so higher doller costs means lower btc supply.

So your thesis is that the fact that it takes $8.6M worth of computer equipment running maybe around 5.4MW to generate 300 btc in an hour has no bearing on the price than if it were just a $100 computer with a $56 card running at 60W. Sounds logical to me!

Or maybe, just maybe, it's all related.

(numbers based on 9603.45 GH/s, $900/GH, .56 KW/GH)