[4+ EH] Slush Pool (slushpool.com); Overt AsicBoost; World First Mining Pool

[(void, *)]

Woke up to see that my miners had been working all last evening on the same 10 hour block. Amazing! And my payout is well below the average for me, at 0.00819707 BTC. I assumed as I was reading that I would have a much better payout because the round had lasted so long, and others dropped out, so my shares would be worth more. Did anybody else have an odd payout for block 109071, either better or worse than normal?

I looked it up, but my payout for block 109071 is the same as other blocks, no freak payout here.

[(void, *)]

I wanted to know how much my gpu power consumption is and how much i pay per year for mining bitcoins.

I took the power consumption of a overclocked 5970, running for 24 hours per day for a year.

overclocked 5970 = 476 watt/per hour x 24 hours x 365 days = 4169760 / 1000 = 4169,76 kWh per year x 0,3 dollar =  $1250,93 per year

The electricity cost is based on dutch electricity included tax and transport cost (1kWh = around $0,30).

A 5970 would cost $3,43 per day on electricity extra on my electricity bill. This doesn't sound much per day, but per year its $1250,93 extra on my elec bill.

The cost of mining is not cheap.

power consumption chart for ati and nvidia gpu cards:
http://bit.ly/gb5XJp

[tMouse]

I'm a bitcoin n00b, but it's apparent that the difficulty ratcheted up yesterday. I would guess that some of what we're seeing is a result of that, combined with a lot of new miners. The round times seem to be consistently longer. My share of the 9 hour round looks to be about normal, but the rounds after that have been a bit better for me, possibly because of the slightly reduced pool.

[Grinder]

As few users disconnected (probably because such long round), pool is currently in very good condition.

It was pretty good with low invalid or stale for a while, but now it seems it's bad again. I think everybody would be better of if you just forced a 3 or even 5% fee and did the upgrades that are necessary to make the pool handle the load.

[xenon481]

As few users disconnected (probably because such long round), pool is currently in very good condition.

It was pretty good with low invalid or stale for a while, but now it seems it's bad again. I think everybody would be better of if you just forced a 3 or even 5% fee and did the upgrades that are necessary to make the pool handle the load.

The only thing that can be done right now that has any meaning is for him (and the miner client developers) to finish implementing the pushwork. This is software, not hardware. This is because of the exponential growth that is outpacing any reasonable possibility of hardware upgrades.

[xenon481]

Woke up to see that my miners had been working all last evening on the same 10 hour block. Amazing! And my payout is well below the average for me, at 0.00819707 BTC. I assumed as I was reading that I would have a much better payout because the round had lasted so long, and others dropped out, so my shares would be worth more. Did anybody else have an odd payout for block 109071, either better or worse than normal?

I got 0.09434370 BTC when I normally average around 0.05 BTC. But, that is within normal variance too.

[(void, *)]

Does anybody know what just happend to the Ghash/s rate, it more than doubled just like that to 134,531Ghash/s for several minutes, i believe its back to 60 Ghash/s again now.
I saw this happening in the past couple of days, yesterday it jumped from 55Ghash/s to 90Ghash/s, but its only for a couple of minutes, then it jumps back.

The last jump was to 211.000Ghash/s and 1014 getworks, around 16.30 UTC


http://img824.imageshack.us/img824/866/statsyz.jpg

[pla]

Cheating will be much more effective with new scoring - you just need to start some ~20 minutes after new block.

Yes.  Yes, it will.  The new scoring method will encourage people to mine solo (or in a flat-shared pool) until a block has gone unsolved for a certain amount of time, then switch to an exponentially weighted pool like Slush's.

On the bright side, that might increase the number of blocks the pool solves (because contributions to it will increase as a block takes longer and longer).  On the down side, this punishes the "honest" participants by devaluing their contributions by 86.5% per ten minutes (if Slush still uses a compression factor of 300).

is it possible for cheater to found winning hash, report it to stand-alone client to make a block and report "sorry, nothing found" to the pool?

No, because you would need the private key used by Slush's bitcoin instance on his server to submit the block.

If I stop or crash for whatever reason and start again, does that reset the time I have devoted or is it equivalent to just picking up where I left off?been working at and start all over or do I just pick up off from the 3 days?

As I understand it, yes - But it doesn't matter for the reason I mention above - Your past participation decays 86.5% every 10 minutes - So after an hour and a half (actually 1:32:06.2), your "share" of the current block has less value than the resolution of a bitcoin (1E-8, aka "zero" in the BTC).

[Dude65535]

Cheating by waiting only works if you know when the completion is coming. Since the process of producing valid blocks is one of random guessing success becomes no more or less likely as time goes on.

[tMouse]

You don't know how long it will take to finish a round, but if you could load balance between multiple mining systems you could set it to devote more cycles the longer a round takes, and fewer cycles to newer rounds. Keeping a finger in every pie, but favoring ones that have taken longer.

I'm not entirely sure how feasible or efficient that idea really is though. It also assumes that there's more than one mining system using the score system.

[slush]

Does anybody know what just happend to the Ghash/s rate, it more than doubled just like that to 134,531Ghash/s for several minutes, i believe its back to 60 Ghash/s again now.

This is known bug in hash meter, but I don't plan to fix it now. I'm focused on pushwork now as it is the only way how to handle rising load and open registrations back again.

[Dude65535]

A workable cheat for the score system could work like this: You have 2 or more GPUs split amount 2 or more score based pools, if you find a valid block for one pool all of your GPUs switch to that pool, after 60 - 90 seconds of uping your score you return the valid block to finish the round. Then you the split up your GPUs to their normal pools again. The shorter the decay period is the more effective such a method would be.

[(void, *)]

Does anybody know what just happend to the Ghash/s rate, it more than doubled just like that to 134,531Ghash/s for several minutes, i believe its back to 60 Ghash/s again now.

This is known bug in hash meter, but I don't plan to fix it now. I'm focused on pushwork now as it is the only way how to handle rising load and open registrations back again.

I am glad its just a known bug, so i don't have to worry about the worst that could be happening.

[demonofelru]

I wanted to know how much my gpu power consumption is and how much i pay per year for mining bitcoins.

I took the power consumption of a overclocked 5970, running for 24 hours per day for a year.

overclocked 5970 = 476 watt/per hour x 24 hours x 365 days = 4169760 / 1000 = 4169,76 kWh per year x 0,3 dollar =  $1250,93 per year

The electricity cost is based on dutch electricity included tax and transport cost (1kWh = around $0,30).

A 5970 would cost $3,43 per day on electricity extra on my electricity bill. This doesn't sound much per day, but per year its $1250,93 extra on my elec bill.

The cost of mining is not cheap.

power consumption chart for ati and nvidia gpu cards:
http://bit.ly/gb5XJp

Although it would be bad it shouldn't be THAT bad first of all that isn't the power consumption of the cards that is the power consumption of the whole system.  Second mining wouldn't take as much electricity as furmark

[whatsoever120]

i just cant seem to find out is it possible to use the same miner account on multiple computers?

[demonofelru]

i just cant seem to find out is it possible to use the same miner account on multiple computers?

I just register new workers for different computers I'm pretty sure that's what you are supposed to do.

Edit: under my account click register new worker and make a suffix

[slush]

after 60 - 90 seconds of uping your score you return the valid block to finish the round.

There is new bitcoin block every 600 seconds, but with very random occurence. When you keep the found block for yourself for 60 seconds and pull every your power to this pool, you risk loss, because somebody else can submit other valid block in the meantime; maybe the pool which you disconnect few seconds before. Maybe you can teoretically achieve few % of additional reward by attack like this, but you risk much higher variance as you will be successfull only in every few attempts of this.

[Dude65535]

If the rate of score decay was high enough it might be profitable. However, I would imagine the spike in share production rate just before a success would be fairly easy to detect by the pool server.

[m4rkiz]

overclocked 5970 = 476 watt/per hour x 24 hours x 365 days = 4169760 / 1000 = 4169,76 kWh per year x 0,3 dollar =  $1250,93 per year

The electricity cost is based on dutch electricity included tax and transport cost (1kWh = around $0,30).

A 5970 would cost $3,43 per day on electricity extra on my electricity bill. This doesn't sound much per day, but per year its $1250,93 extra on my elec bill.

http://bit.ly/gb5XJp

it is not 476 watt

first you need to subtract 168W that rest of the system uses (if you don't run your pc 24/7 then adjust it properly) and remember to subtract another 50W that 5970 uses in idle anyway

then you need to guess how much is actually used when mining with full speed - that could be another 50W less than when gaming

[pla]

first you need to subtract 168W that rest of the system uses (if you don't run your pc 24/7 then adjust it properly) and remember to subtract another 50W that 5970 uses in idle anyway then you need to guess how much is actually used when mining with full speed - that could be another 50W less than when gaming

... For the times you would have had your PC on anyway.

For the other 16+ hours a day, you have to consider the full power consumption as something you wouldn't have used if not for mining.

However, purely for measuring MH/W, it surprises me that no one has actually measured the change in draw directly, for the most common cards at least.  Just hook your PC to a Kill-A-Watt, get a baseline reading, then start the CUDA/CL miner and see how it changes.  It seems like a fairly critical deciding factor in actual mining efficiency, since as TEOTWAWKI pointed out, the upper limit can run you over a grand a year in electricity.

If anyone wants to donate a 5970 to me (or any other high-end cards), I'll gladly measure it and update the wiki.