Who's going to show you there is a goat behind a door?
You sir have hit the nail on the head. In a weird coincidence, I just explained the monty hall problem to my daughter today. *Checks for hidden microphones* There is a specific term for this kind of phenomenon, but it escapes me at the moment. I believe the term is Dutch or some other similar language. It basically states that upon learning new information or discussing something long forgotten the likelihood of hearing about it fairly shortly afterwards is increased. |
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In the Monty Hall problem, the host has knowledge that the player does not. In bitcoins, the pool does not have this knowledge.
Monty Hall does not open one of the 2 remaining doors at random, he shows you one which does not contain a car because he knows which one has the car in it.
If you do what you suggest you would just increase variance by a wide margin which is what pools are looking to reduce.
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Well, lost 3.75BTC last night in a run of bad luck. (I was betting between .5 and 1BTC at a time.)
Oh well, it was fun, and it seems fair from what I can tell.
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Dr. Strangewhale or: How I Learned to Stop Worrying and Love the Deal
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(which would require over 50% of the network if difficulty was roughly accurate, and I won't allow the pool to reach that level even if the users tried).
Thank you |
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BlowMe, The Bit-ter whale
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Ok.. so I just won.. Kind of wondering though, 170% of .40 would be .68BTC, but I only received .65BTC. .005BTC admin fee +3% transaction fee should have only been .0188 BTC
Just wondering where the other .01 or so BTC went to? Was it pocketed, or was it paid as a transaction fee?
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I just want to take back my skepticism from the beginning of this thread. It's a great thing you are doing for the community.
I am going on record saying I will donate 25% of the jackpot back to the pool if I win and 25% to a charity of my choosing.
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Software overclocking doesn't void warranty.
yes it does, although there's no real way to prove that you did overclock. So Sapphire, a graphics card manufacturer releases a tool that will void your warranty on their card? I find that hard to believe. |
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I do NOT recommend you overclocking to 1025.
Information:
==========
1) 5830 uses more energy/wattage than almost any other card, specially @ 90% fan and overclock
2) Stick to 975/340 and you'll easily get 301 mhash/s with 70% fan speed.
3) 1025/325 is expensive ($$ pay for electricty)
4) Fans in general have only a certain # of life cycles (The more they spin, the less life-time they have) 90% way too much.
Fan's only have so many cycles, by upping the speed to 90%, you are reducing the life of your card.
Overclocking already voids the warranty, I wouldn't do anything further unless you really don't care about the GPU.
I speak from experience:
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I have 6x5830's setup with the above settings (975/340).
Anything over really is not worth it.
I've tried XFX and Sapphire cards, same setup works for bot chip-sets.
I keep my cards cool to 55-60 celcius, sometimes hits 62 but hey, it works just well.
Anything over 975 for me made everything just unstable.
Hope this helps.
TDP * ( OC MHz / Stock MHz) * ( OC Vcore / Stock Vcore )^2 Since I don't touch the core voltage it's essentially TDP * (1025/800) vs TDP * (975/800). Or, 5% extra wattage for an increase of 5% to my hash rate. Power draw difference on a fan spinning at 3600RPM vs 3100RPM is not much of a difference. The major issue with that, like you said, is the extra wear on the fans and the noise. I get about 5-6C difference from 75-100% fan speed. I have my money being on wear and tear from sustained thermal exposure being more detrimental to the life of a card than the shortening of the fan life. I still have my 9800GT that was running for 4 years at 100% fan speed. The card gave out before the fan did. I will agree though, for most users 1025MHz will be unsustainable and unstable. I got very lucky on the cards I received. It's all in what you are comfortable running at vs life you expect to get out of the cards. I have a feeling that mining will not be profitable long before I wear the cards out, and I want to squeeze as much out of each one as I can. Edit: Also, the 100% is a software limit on the fans. If you really want to see how fast they'll spin, wire them directly to a 12V line of your PSU.. I wouldn't put money on them lasting for more than a few weeks at those speeds though. |
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You may think that child, then leave it alone.
Maybe someone of a helpful disposition who actually knows something will be kind enough to respond.
On second thought, I'm sorry I gave you any answer at all. This kind of attitude is ridiculous. |
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Dummy plug or a quick fix is to plug in your monitor to your second card, then start up the miner on the same device number. It will default to the card that your desktop is displaying on at that time.
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AFAIK Slush does not support LP. You also have a ridiculously low hash rate judging by your other rewards. Here's probably what happened. You got sent some work units to solve towards the end of the previous round. Your computer finished those and submitted after that round was over, therefore they were stale. You received new work and didn't finish it within the 35 second round.
So yes, you did have shares, but they didn't count because they were stale by the time you sent them back. Even at 2GH/s I sometimes get extremely unlucky and have rounds with only a couple of shares and a very low payout. There are other times that I get extremely lucky and end up with twice my expected payout on very short rounds.
That's my best edumacated guess.
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The forums are dying, so hopefully this goes through. I run a very similar configuration. I went with Windows 7 as I have more experience setting that up. I'm running 11.5 Catalyst drivers, 2.4 SDK Phoenix miner with the following settings BFI_INT VECTORS WORKSIZE=256 AGGRESION=13 FASTLOOP=false -k phatk Overclocked via MSI Afterburner after adding the following to the cfg file [ATIADLHAL] UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it EnableUnofficialoverclocking = 1 UnofficialOverclockingMode = 2 AccessibilityCheckingPeriod = 0 Settings in Afterburner are 1025 Core clock, 325 Memory. You can't just bring the memory down to 325 in 1 go, and you can't ever set it between 500-600 or it will lock up. Set it to 650, close afterburner, reopen afterburner, set it to 325. Fan speeds manually set to 90% I get 314-317 MHash/s per card. GPU temps are between 53-56C (basement, so ambient is very low) This is faster than I ever achieved with any other combination of software, miner, and SDK version with these cards. Memory cannot be easily underclocked in linux so you'd have to bios flash the cards using windows first if you went the linux route (if you want the benefits of lower temps and slightly higher MHash/s that comes with lower memory clocks) If you need any additional help PM me or respond here. Edit: In windows a dummy plug is not exactly necessary, but it does make things easier. Without a dummy plug you'd overclock 1 card, and start mining on it. Then switch the cable to the other card, overclock it, and start mining on it. The 30 second dummy plug will work, but the 5 second dummy plug is quicker and just as reliable. http://blog.zorinaq.com/?e=11 |
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Using the molex-modified PCIe x1 cables, and they work so far. Now I'm at the maximum of my PSU and will order a new one. Just a quick question: is it save to power a card on another PSU than the others? I basically have 3 cards already all on 1 PSU, and the fourth will be on PSU #2, and connect its 6/8-pin connector and its molex to this PSU.
Could there be a problem or am I on the safe side?
It's not safe, but it can be done. Short a Green and Black wire on the 20/24 pin ATX connector using a paperclip shaped like a U. Hook up graphics card. Try to figure out the exact timing of turning everything on. It needs to be near simultaneous, but not quite. Basically a few milliseconds after the main PSU starts the dedicated one needs to be switched on. Although not all PSUs will power on like this, some need a constant draw device like a case fan hooked up to a molex connector. |
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Not for long. Just bought 4 of them.
Lol, out of stock |
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Google for RSC-R2UT-2E8R (2 way)
RSC-R2UU-A4E8+ (4 way)
They should work in theory, but splitting the power between power hungry graphics cards may not work out so well. The spec allows for up to 75W across the bus I believe, hopefully a card with 2 auxillary power connectors and only 1 physical gpu die wouldn't draw enough from the board to cause any damage.
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That card version is almost a full year "newer". Wow, I can't believe they got the originals back in stock for a few minutes. I just assumed they were the Xtreme version. Well, I bought 1 more card. I couldn't resist. Hopefully it will at least pay for itself. But with the giant jumps in difficulty coming I'm not too certain. |
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Ill take it
Edit: sent
Code sent |
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