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Bitcoin Discussion Thread

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Chihlidog said:
Im no expert myself. At all. Im figuring things out as I go. I THINK that BTCguild just fluctuates more than deepbit, but I was just double-checking on that. My current results seem to confirm this, as in the last 2 hours I have made half of what I made in the last 10 before that. So now I seem to be going way up.

I'm going to stick with it till the [H] pool is online.
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nope, it's not fluctuation, it's because they are the pool with the most hashing power, therefore they find more blocks and find them quicker than the smaller pools, thus more payouts, if you think your profits are getting hit hard by using BTC Guild instead of Deepbit then think of what will happen if the [H] pool goes online and you join that, it'll start with probably 1/30th the hashing power of BTC Guild (and around 1/50th of Deepbit?), I'll try it because I think the low membership may make payouts worthwhile when the blocks are actually found, we'll see...
 
wol-va-rine said:
nope, it's not fluctuation, it's because they are the pool with the most hashing power, therefore they find more blocks and find them quicker than the smaller pools, thus more payouts, if you think your profits are getting hit hard by using BTC Guild instead of Deepbit then think of what will happen if the [H] pool goes online and you join that, it'll start with probably 1/30th the hashing power of BTC Guild (and around 1/50th of Deepbit?), I'll try it because I think the low membership may make payouts worthwhile when the blocks are actually found, we'll see...
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Don't they have to split the coins mined between many more users so it should balance out?
 
Kardonxt said:
Don't they have to split the coins mined between many more users so it should balance out?
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Should balance out, sometimes even big pools hit a rough spots in terms of finding blocks.
 
gigatexal said:
bitoption.org
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The interface is a bit confusing. What does the "Price" column signify? I thought if you wanted to buy an option, you pay the Ask or you can sell an option for the Bid.

Similarly, am I correct that you can't buy a specific option by selecting it from the list? You have to place an order matching the option you want and then the system automatically matches the buyer and seller?
 
Yakk said:
Should balance out, sometimes even big pools hit a rough spots in terms of finding blocks.
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+1

Guys stop thinking that you can get more with one pool than with other. In the long term if you spend a year of 24/7 solo mining you will receive the same amount of coins as if you were mining in a pool (assuming the pool charges you 0 in fees). Why is this true? Because your share of coins is determined by your own hashing power, the more power you have the larger your share (there is also the hidden benefit of getting more shares in when blocks are found quickly).

The only difference between these 2 approaches is the frequency of payouts. Pool mining gets you a very small steady trickle of coin fractions, whereas solo mining gives you chunks of 50 (once we hit the 210000 block it will be cut in half to 25) but as difficulty increases it will become increasingly harder to find a block on your own so pool mining is a good way to see a return from your work right away.
 
Kueller said:
Unlocked 940/1350 1.175vcore, guiminer flags -v -w128 -f10 gets me ~400Mh/s (or -f30 if I'm using the PC and it feels choppy, but that knocks me down to ~395Mh/s). +20% Power Control setting in CCC, this is a big one, without it I'd top out at ~350Mh/s no matter what core overclock I set.

I even managed to play about an hour of TFC (12y/o version) last night with -f30 and it only dropped me down to 385Mh/s...It did eventually crash my computer though so I'm not sure I'd recommend trying that.

All Mh/s numbers are from the bottom right corner of GUIminer and fluctuate slightly (more with -f30).
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wow, nice, i think i'll keep my 900 / 1375 clocks the temps rise to close to 100C at 1.2v (1.175 is close).
 
burningrave101 said:
So that's the one you guys are all using to exchange your bitcoins for Amazon gift cards?
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Yes, also that site offers a hidden benefit. Notice he uses the previous 24 hour Mt.Gox average price (currently $19 while coins at Mt.Gox are being traded at ~$17). That means if BTC value drops very fast and suddenly you still have a nice window of time to exchange your coins at the previous higher value.
 
gigatexal said:
wow, nice, i think i'll keep my 900 / 1375 clocks the temps rise to close to 100C at 1.2v (1.175 is close).
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55-60% fan, temps stay right around 75C for me. Fan is definitely audible at that speed though.
 
Kueller said:
55-60% fan, temps stay right around 75C for me. Fan is definitely audible at that speed though.
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those mem clocks are insane, and actually go against the conventional bitcoin mining experience, most people OC their core and underclock their mem speeds to about 1/3 the core, have you tried that to see if your MH/s goes up...?

anyway, those are some nice numbers...

:D
 
Would overclocking your card affect your mh/s? I am averaging 355 on my 6950 2gb unlocked shaders at 6970 speeds. Just curious if its worth trying to OC a bit more or not for this. Temps are not even close to being an issue yet.
 
justinope said:
Would overclocking your card affect your mh/s? I am averaging 355 on my 6950 2gb unlocked shaders at 6970 speeds. Just curious if its worth trying to OC a bit more or not for this. Temps are not even close to being an issue yet.
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yes, overclocking affects MH/s greatly, and in a lot of cases underclocking memory brings added hashing as well...
 
Quick question, what HPC purposes is bitmining used for? Basically is there some sort of backend where people buy bitcoins to spend on cheap HPC capabilities or something else?
 
wol-va-rine said:
those mem clocks are insane, and actually go against the conventional bitcoin mining experience, most people OC their core and underclock their mem speeds to about 1/3 the core, have you tried that to see if your MH/s goes up...?

anyway, those are some nice numbers...

:D
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I did try taking it down to 345 and a few steps in between but it didn't seem to make any difference what the mem speed was. Since this is my main rig, I decided to just set it a step below my gaming clocks for 24/7 operation...Opening up afterburner 5 times to get up to 1400mem every time I want to play a game, then opening it 3 times to get down to 345mem after the game sucked, and the presets I saved would not take the mem clock beyond the current limits for that instance of afterburner. I didn't try going all the way down to 1/3 core (315ish) so I'll give it a shot and see if it does anything. Will also see if it seems to make much of a power consumption difference (<5w I don't care about, 10w maybe, 20w+ downclock immediately)
 
wol-va-rine said:
yes, overclocking affects MH/s greatly, and in a lot of cases underclocking memory brings added hashing as well...
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gotcha, thanks! I guess I need someone with an unlocked 6950 to give me their experience then lol. I'm not sure if I want to underclock it too much. Are we talking like 100mhz, 200, etc? I guess I could try myself
 
I'm going to have to start looking at some aftermarket cooling if I plan to run these GPU's 24/7 overclocked. The 5870 I have running now will do 1Ghz core or better but the reference design fan has to run at 50% or more to keep temps at 80C and under. And it's tolerable during the day but I hate that much noise at night trying to sleep.
 
Yep, DC in the bedroom is tough but that is also where I have my main PC. It so much nicer when you run a dedicated server and can just stick in a couple 2krpm fans instead of having to use fans that only make a gentle breeze.
 
Chihlidog said:
Wow, BIG drop in price today. Still worth it but I hope this doesnt continue.
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"The cause of this is actually extremely simple, dwolla withdrawals from mtgox were down on mtgox for a few days, so nobody had any reason to sell BTC.

As soon as it came back up the volume of asks exploded."
 
I know some of guys are having the same issues as me with getting your memory lower on these amd cards. I managed to lower my memory clock down to 300 with Sapphire Trixx.
 
nxcess said:
I know some of guys are having the same issues as me with getting your memory lower on these amd cards. I managed to lower my memory clock down to 300 with Sapphire Trixx.
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MSI Afterburner allows you to lower the memory down to 300Mhz but the problem is that that setting won't stick. As soon as I reboot the computer its back up to 1200Mhz on my 5870.
 
I couldn't lower mine pass 600. I've read through this thread that others had the same issues. Sapphire Trixx does it without the need to close and reopen. I haven't restarted so I can't confirm if the settings will stick upon reboot.
 
nxcess said:
I couldn't lower mine pass 600. I've read through this thread that others had the same issues. Sapphire Trixx does it without the need to close and reopen. I haven't restarted so I can't confirm if the settings will stick upon reboot.
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I tried Trixx with my crossfired 4870 and 4890 and had all kinds of issues that I wasn't having with afterburner, so I just went back to that...
 
I had to use Trixx to go below 500 on my 5830. It also allows you to restore the clocks on a restart.
 
btw I got a nice boost out of adding the worker size switch to process as 128 (-w 128) on my 6950 unlocked at 950/1400 1.175 volts. however, underclocking memory didn't do anything for me at all, all the way down to 700
 
Really thinking about getting that 6950 I was eventually going to get. Tempted to get it now and maybe its mining can help pay it off.
Split between the MSI R6950 Twin Frozr III and the ASUS EAH6950 DCII 3 slot card.
 
I'm looking to buy some bitcoins - paypal would be the most convenient way for me to pay. If you have another preferred payment method, please suggest it!

PM me if you have bitcoins to sell.
 
Found a source of 23 Radeon 5830's, but it's steep at $148 plus shipping.

I'm debating whether to pick up a third 6950 and unlock it (400mhash @ 270) or get two 5830's and throw them in my WHS (600mhash for $300).

I know from a $ per hash standpoint the 5830's are much better, but a third 6950 would keep everything consolidated in my main rig, will hold its resale value better, can be used for gaming as well, and will keep the noise and heat out of my living room!

The problem really is though, with the next difficulty increase at 45%, it will take weeks for the cards to pay themselves off - if they ever do, depending on the value of the market. Seeing as how I'm not real confident about the value of a bitcoin in the near future, I think the 6950 route is smarter as it has a second purpose (gaming).
 
LOL, amateur trolls claiming they built some outlandish 90 video card mining clusters and say that mining isn't profitable anymore just to scare people away. The good thing is the community is full of geeks that know their shit and not some trust fund kiddy who hired someone to spend their money for them. They just get laughed out pretty quickly.

Even if coins go down to single digit value, mining is still profitable if you have enough hashing power and electricity is cheap enough where you live. Anyone who gets into this without the due diligence to check those expenditures to at least a month in advance is a fool.
 
Lorien said:
Yes it did. It lowered your energy consumption saving you cash in the long run.
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Not as far as I could tell on my 6950. 300mem or 1400mem, wattage didn't fluctuate more than about 5w or ~1.1% for the whole system at the wall. Maybe it saves power on some cards, but it doesn't seem to help my 6950 at all.
 
Lorien said:
LOL, amateur trolls claiming they built some outlandish 90 video card mining clusters and say that mining isn't profitable anymore just to scare people away. The good thing is the community is full of geeks that know their shit and not some trust fund kiddy who hired someone to spend their money for them. They just get laughed out pretty quickly.

Even if coins go down to single digit value, mining is still profitable if you have enough hashing power and electricity is cheap enough where you live. Anyone who gets into this without the due diligence to check those expenditures to at least a month in advance is a fool.
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My electricity is FREE and sequential 45% difficulty increases without being offset by value SUCK.

If bitcoins rise as they have historically, sure, it will be profitable. But if they don't, you're getting your profits cut in HALF every ten days. Mining is profitable right now, but in just three days it will only be half so. Then ten days after that if trends hold, another 30-50% of your profits are gone.

Right now, I'm making $20 per day with 2 6970's and a 5850. In three days, if market price stays where it is right now I'll be making about $14. This difficulty rate is pretty much known already. In ten days, I'll be in single digits.
 
I wouldn't rush to make any claims until after the weekend once banks reopen and process the transactions of people cashing out.
 
dude should have linked short encrypted messages to ride on the bitcoins. only the person getting the coin could read the message. That would make bitcoins have an actual purpose. Buy bitcoins to send messages and pay some money to send somebody a message. Need to send a big message or a video, have to send a bunch of bitcoins carrying the message. Each bitcoin could hold a 80 byte message, which doubles the size of each transaction. That would help ensure a steady stream of transactions which would help liquidity in the market (ie: vs volatility, huge spikes up and down).
 
jiminator said:
dude should have linked short encrypted messages to ride on the bitcoins. only the person getting the coin could read the message. That would make bitcoins have an actual purpose. Buy bitcoins to send messages and pay some money to send somebody a message. Need to send a big message or a video, have to send a bunch of bitcoins carrying the message. Each bitcoin could hold a 80 byte message, which doubles the size of each transaction. That would help ensure a steady stream of transactions which would help liquidity in the market (ie: vs volatility, huge spikes up and down).
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I think it will stabilize shortly, but at a lot lower rate than the 30 it hit recently. Im actually still OK with that. Now that people have invested real money in it (buying hardware with cash, and buying coins with cash) many of those same people will keep the trade alive, so they will hold some value. The 30 bucks per BTC it hit was a fluke, but I think it may actually do it again in the next few weeks.

IF the US govt. really gets serious about regulating it, that's when the bubble is going to pop.

Of course, I could be sadly mistaken, but after looking at all the factors here that's my take on it. It doesnt necessarily need to have an actual purpouse. The fact that people have invested real money in it now has given it some intrinsic value.
 
Chihlidog said:
IF the US govt. really gets serious about regulating it, that's when the bubble is going to pop.
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This has as much chance of being regulated as the government stopping torrents. And this is far more anonymous than torrents because you get a new unique address for every transaction you make.
 
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