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Bitcoin Discussion Thread

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i was thinking of that also but i've read that people have measured and it draws less power?
its quite weird to me actually
 
You can downclock the memory to reduce power used, since memory bandwidth is not an issue. You need another app for that though since the catalyst control panel does not support downclocking.
 
wol-va-rine said:
where did you get that chart...? the latest one I saw was this one posted this morning on the forums...

chartchs350x200chdt1032483312351572.png


I hope the one I saw is right...
Click to expand...

The Mt.Gox pool was getting DDOS'd at that time so my graph is wrong.


LightningCrash said:
For what? Speculation?
Click to expand...

Well not just that but people panicking like headless chickens because they don't understand how the 51% attack is going to be very hard to pull off (under current conditions). But as I said above the Mt.Gox pool (Eligius) was getting DDOS'd so their share was added to deepbit for some reason. In other words it ain't happening yet.
 
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computerpro3 said:
I'm going to try to run 2 overclocked 5830's on a CX400 and 2 more on a CX430 :p

If it goes boom, it goes boom. Luckily the rest of the system are low power AMD setups.
Click to expand...

if I were gonna try something like that I definitely would NOT overclock them, unless you have $ to throw away in case they indeed go boom, you may want to also consider that the week or so that will be lost while waiting for replacements would've produced roughly 1/3 the bitcoins that those cards would've produced in their lifetimes...
 
9x MSI HD6990s in stock at newegg @$729.99 + 8.50 shipping [sold out]
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127574

There's also one of those PowerColor watercooled ones for $899.99 + 8.50 shipping
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131438

1x XFX HD5970 Black Edition $769.99 + free shipping [sold out]
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150500

4x MSI HD5870 Lightning $219.99 + free shipping [H]ot! factory overclocked @900Mhz core [Sold out]
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127509

2x Gigabyte HD5870 $239.99 + $7.87 shipping [Sold out]
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125322

Newegg doesn't even need to do advertisement, lol. I'm doing it for them.
 
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damn being away on a job site and for this to happen. Would have loved to grabbed 2 5870 for that price
 
Are you guys just constantly checking the egg to find when they are in stock? I don't think it ever stays in stock long enough for me to get an auto-notify email haha.
 
anyone who wants to trade your 6950s for 5870s talk to me :)
 
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seems like the whole 50% thing is getting taken out of context.
My understanding is that someone would have to control the 50% bitcoin applications in order to do double transactions, etc. In reality deepbit, etc, just are linked to the miners, which only process blocks, but do not handle other types of transactions. So the DDOS attacks just seem silly.
 
might mine... might sell my 5870s and 5970 ... meh
 
My power meter came in. Here's what I've got so far:

My whs with the CX430 idles at 68w from the wall. At 80% efficient, that's 55w from the psu. Adding 2 5830's should put me right on the bleeding edge, but it should work.

My HTPC is a no-go, as it idles @ 98w. Once again, 80% efficient so 79w from the psu. I don't think I'm going to try two cards on here, as it would be too close for comfort.

My desktop (5ghz core i7 2600k, XSPC watercooling pump, 2 6950's with 6970 bios flash @ 930mhz / 1375 memory, 16GB ram, 2 120mm fans, 2 80mm fans) is the following:

Bitcoin on one card running: 396w from the wall.
Bitcoin on two cards running: 623w from the wall
Bitcoin on two cards running while OCCT is running cpu burn test on all 4 cores with hyperthreading on: 690w from the wall.

So even WORST case scenario, with 690w from the wall times .8 efficiency, that's only 552w that the system is pulling. It can easily handle Trifire with a third 6950/6970 and people are blowing the psu requirements way out of proportion.
 
computerpro3 said:
My power meter came in. Here's what I've got so far:

My whs with the CX430 idles at 68w from the wall. At 80% efficient, that's 55w from the psu. Adding 2 5830's should put me right on the bleeding edge, but it should work.

My HTPC is a no-go, as it idles @ 98w. Once again, 80% efficient so 79w from the psu. I don't think I'm going to try two cards on here, as it would be too close for comfort.

My desktop (5ghz core i7 2600k, XSPC watercooling pump, 2 6950's with 6970 bios flash @ 930mhz / 1375 memory, 16GB ram, 2 120mm fans, 2 80mm fans) is the following:

Bitcoin on one card running: 396w from the wall.
Bitcoin on two cards running: 623w from the wall
Bitcoin on two cards running while OCCT is running cpu burn test on all 4 cores with hyperthreading on: 690w from the wall.

So even WORST case scenario, with 690w from the wall times .8 efficiency, that's only 552w that the system is pulling. It can easily handle Trifire with a third 6950/6970 and people are blowing the psu requirements way out of proportion.
Click to expand...

much appreciated
ill go install my new ones then
 
computerpro3 said:
My power meter came in. Here's what I've got so far:

My whs with the CX430 idles at 68w from the wall. At 80% efficient, that's 55w from the psu. Adding 2 5830's should put me right on the bleeding edge, but it should work.

My HTPC is a no-go, as it idles @ 98w. Once again, 80% efficient so 79w from the psu. I don't think I'm going to try two cards on here, as it would be too close for comfort.

My desktop (5ghz core i7 2600k, XSPC watercooling pump, 2 6950's with 6970 bios flash @ 930mhz / 1375 memory, 16GB ram, 2 120mm fans, 2 80mm fans) is the following:

Bitcoin on one card running: 396w from the wall.
Bitcoin on two cards running: 623w from the wall
Bitcoin on two cards running while OCCT is running cpu burn test on all 4 cores with hyperthreading on: 690w from the wall.

So even WORST case scenario, with 690w from the wall times .8 efficiency, that's only 552w that the system is pulling. It can easily handle Trifire with a third 6950/6970 and people are blowing the psu requirements way out of proportion.
Click to expand...

how is one on the bleeding edge that you are guessing "should" be okay and one a no go proving that people are blowing PSU requirements out of proportion...? I thought the discussion was about the aforementioned CX430 powered systems...? sounds like people were (or at least I was) pretty dead on when they said it wouldn't be a good idea to CF the 5830s on the systems with that PSU, also you had mentioned overclocking the 5830s as well, I still don't think that'd be a good idea...lol

also, you guys buying gear, actually "investing" in mining, you should consider that the gold rush is over and actually has been for some time now, for instance, let's say you put together a dedicated mining rig by piecing together a system with parts laying around and throw in a 5870 (~400MH/s) as part of that system ($0 cost), in the lifetime of that rig you will mine 14 bitcoins with it, 5 of those will be mined within the first 10 days and 8 will be mined within the first 20 days, from then on it's pretty slim pickins and only gets slimmer as time goes on, in the beginning of September you will finally mine your 14th and last full BTC, and by November your mining will be producing about 0.02 BTC every ten days, that's with the assumption that difficulty will only increase 50% each time, it may increase more and even lessen those numbers, even if you're pulling 2GH/s right now the expected total your rigs would mine is around 72 bitcoins from this date forward...

be careful fellas, my suggestion would be mine what you can now with as little investment as possible, don't think you're gonna buy 8 video cards now, mine, and then sell them, because guess what...? there will be hundreds, maybe thousands of those same video cards on the market, you're not the only one with this plan and it will definitely be a buyer's market, I'm not saying that the bitcoins you do actually mine won't be worth it, their value may rise exponentially as they become more scarce, and then again they all may not be worth the value of the hard drive you store your wallet on, this isn't guaranteed money guys, BE CAREFUL and think this through...

here's a calculator to see what your rigs will mine (you can also see the expected exchange rate, but that is extremely exaggerated imo)...

mining forecaster
 
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wol-va-rine said:
how is one on the bleeding edge that you are guessing "should" be okay and one a no go proving that people are blowing PSU requirements out of proportion...? I thought the discussion was about the aforementioned CX430 powered systems...? sounds like people were (or at least I was) pretty dead on when they said it wouldn't be a good idea to CF the 5830s on the systems with that PSU, also you had mentioned overclocking the 5830s as well, I still don't think that'd be a good idea...lol
Click to expand...

The htpc has a cx400, the 430 is in the whs. Combined with the fact that the htpc draws more power, thats why its a no go.
 
wol-va-rine said:
I will buy your 5870 and frankenstein that shit...lol
Click to expand...
No thanks, I'll just take my warranty replacement. Hopefully they don't have any and have to send me a 6970 instead. =)


Kueller said:
Right now there's only 6.5m bitcoins out there, in terms of a liquid currency that's nothing. If bitcoin actually got popular, there wouldn't be enough bitcoins to let them do anything. 6.5m, that's like .01BTC for every facebook member. I think this will keep it from ever truly taking off.
Click to expand...

https://en.bitcoin.it/wiki/Weaknesses#Coin_destruction
Coin destruction
BitCoin has 8 decimals of precision, so the entire network could operate on just a handful of BitCoins. An attacker could never destroy them all. If deflation gets to the point where transactions of more than 10BC are unheard of, the client can just shift the decimal point over so that, for example, people with 0.01 BitCoins have 1.000 BitCents.
Click to expand...
With 8 decimals of precision (which can be adjusted), that .01 BTC could essentially become 1,000,000 BTC.
 
why does my Mh/s jump around so much? on my 5870 with nothing changed except sliding the clock speed to 900 in CCC, i get around 360 when watching guiminer on my comp. im at work now, so i cant see it, but my 15-min average on the btcguild site has been from 300 all the way to 400 today. weird?
 
ekuest said:
why does my Mh/s jump around so much? on my 5870 with nothing changed except sliding the clock speed to 900 in CCC, i get around 360 when watching guiminer on my comp. im at work now, so i cant see it, but my 15-min average on the btcguild site has been from 300 all the way to 400 today. weird?
Click to expand...

The website average is usually wrong.
 
All you would need to see decimal coins as whole coins would be an update to the wallet software. You could still keep using the same 21m whole coins in the background and just shift the decimal in client software.

In 3 days with a 6850 and 2 days with a 5830 I managed to get $60 for my 3.5 coins. Mind you that involved some namecoin mining for a day before they revised the difficulty but I hope the price stays over $15 so this continues.

The best exchange for Canadians is www.cavirtex.com. They let you deposit money using Canadian EMT which is money transfer run by the banks that lets you send money within an hour to their account. You can deposit money very quickly and they also do direct deposits of money from your coin sales into your Canadian bank account within a day for only a $2 fee. They might have more fees in the future but right now they're in beta. Also they have a 1 888 phone number.
 
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computerpro3 said:
The htpc has a cx400, the 430 is in the whs. Combined with the fact that the htpc draws more power, thats why its a no go.
Click to expand...

my guess (obviously I could be wrong) is that the whs is gonna be pushing it's threshold with two 5830s, I hope it lasts for you though...
 
ekuest said:
why does my Mh/s jump around so much? on my 5870 with nothing changed except sliding the clock speed to 900 in CCC, i get around 360 when watching guiminer on my comp. im at work now, so i cant see it, but my 15-min average on the btcguild site has been from 300 all the way to 400 today. weird?
Click to expand...

someone told me your average on sites is also affected by valid shares, since the blocks are random if you find a few shares in small time intervals your rate at the site will go up, but if you hit a rough spot and go minutes between shares your rate drops, the constant MH/s rate for your miner is more accurately reflected in the DOS or GUIminer window, plus site downtime from DDoSs and such affects it as well...
 
I had 2 in my cart and was trying to check out when it told me there were insufficient quantities.
 
Zink said:
All you would need to see decimal coins as whole coins would be an update to the wallet software. You could still keep using the same 21m whole coins in the background and just shift the decimal in client software.

In 3 days with a 6850 and 2 days with a 5830 I managed to get $60 for my 3.5 coins. Mind you that involved some namecoin mining for a day before they revised the difficulty but I hope the price stays over $15 so this continues.

The best exchange for Canadians is www.cavirtex.com. They let you deposit money using Canadian EMT which is money transfer run by the banks that lets you send money within an hour to their account. You can deposit money very quickly and they also do direct deposits of money from your coin sales into your Canadian bank account within a day for only a $2 fee. They might have more fees in the future but right now their in beta. Also they have a 1 888 phone number.
Click to expand...

They have a 1-888 number? Seems some are trying to be more professional, thanks for the link, more homework to be done.
 
New AMD Cats are out, 11.6 Let us all know if you(anyone) tries them and makes either a positive or negative effect to hash output.
 
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Omegas said:
New AMD Cats are out, 11.6 Let us all know if you(anyone) tries them and makes either a positive or negative effect to hash output.
Click to expand...

I'm definitely not upgrading, I'm running the ATI-Stream-SDK v2.1 in both rigs and each miner got a 10MH/s bump up after downgrading from v2.4, I'll update everything when I'm done mining...
 
Omegas said:
New AMD Cats are out, 11.6 Let us all know if you(anyone) tries them and makes either a positive or negative effect to hash output.
Click to expand...

Good luck getting anyone to stop their miners before the difficulty change lol. Every share counts! :D
 
with the potential for shares to go up, someone will try them.
 
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