2-factor authentication doesn't seem to be working..

I registered, activated my account, activated 2-auth first thing like I do on all my accounts, fired up a browser on another computer, tried logging in, and I got straight in without needing to type in my code.

That's a HUGE issue right there, I won't touch any exchange that doesn't offer a working 2-auth, keyloggers, local sniffing, people standing nearby, and even local storage of passwords are all too common for not using 2-factor or more authentication wherever there is money involved.

Too bad because I wanted to buy in on several alt currencies...

That's great, thanks for clearing that up, I'll buy those then.

And also, if I can ask something else, what do you think of this mobo? http://www.newegg.com/Product/Product.aspx?Item=N82E16813128509

The price isn't bad, and the 5 PCIe don't seem bad either.

Provided it'd be a good choice, do you think a somewhat crappy CPU like an Athlon II X2 250  http://www.ebay.com/itm/121077300811?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 @3Ghz would be enough for running initially one card and up to 5 after a while? (I ordered a 1200W PSU, the Corsair AX1200)

Thanks again!

Taco, may I ask what iteration of the 7950 you're using in your rig?

I'm putting together one myself, but with all the different models with different clocks, locks, and whatnot, I am completely lost about which one would be the one to buy..

Which ones would you recommend out of these? http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&N=-1&isNodeId=1&Description=7950&x=0&y=0

Thanks for your suggestion.

I actually ended up going with this PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139014
It's probably a little bit overkill, but I just thought I may find a use for it anyway at a later point..

The http://www.newegg.com/Product/Product.aspx?Item=N82E16813128509 mobo you suggested does also look like a great deal too, so I'll wait a while if somebody maybe has another suggestion, or else I'll pull the trigger quite soon.

What kind of CPU could I actually mount on that? (as cheap as possible, as long as it works, as I won't be using it for anything else other than mining)

And also, which 7950 should I get? There are 14 version+, (http://www.newegg.ca/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&N=100006663&isNodeId=1&Description=7950&x=0&y=0) and I have to apologize for my noobish question, but what difference is there actually between them? I thought a certain GPU model was the always the same..

Even though I've been interested in the concept of crypto-curriencies and used bitcoins ever since late 2010, and while I deeply regret not getting into the whole mining thing back then, after getting to know litecoins, I decided that mining at this point, sounded like being worth a shot , also considered, that in the worst case scenario, I'll just end up either selling the HW I'm going to use for my rig, or use it somewhere else.


So anyway, I'm really not sure about what to buy, but with a start budget of 750$, here's what I came up with:
1x: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131858R (it has 5x PCI 3 16x, so it seems like a good choice as I'd be able to add more cards in cross as soon as I have some more money)

1x: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125414 (apparently it gets up to 620 kH/s, which isn't bad considering the 299$ price)

And as far as the PSU goes, I'm really not sure about what I should buy to be able to run 5 cards (even though I doubt I'll be using more than 2-3 for the next few months) Any advices?

For now that's actually all that I was thinking of buying, as I don't think I'd need anything else, besides a couple of PCI risers that are near free on ebay (1-3$), as I have HDs laying unused all over my place, as well as random ram modules of all kinds.

I would be putting everything in an open frame setup, so space isn't an issue.

What do you guys think about the mobo and the 7950? Would it be a good choice or should I be looking at something else instead?

Thanks in advance!

So, I run into a deal the other day, where I managed to get 19 Lenovo workstations for free (they were throwing them away at my office), as per the pics below (some are missing from the image)

http://d.pr/BL9q+

http://d.pr/CrMy+

All of them are running on Intel Core 2 Duo processors clocked at 1.80GHz, and have RAM ranging from 512 to 2048MB.
They all also seem to have a free PCIe slot, as per the following pictures:

http://d.pr/UK5a+ (full size img)



http://d.pr/32Po+ (full size img)



And that's the really interesting part, since I think that it would be quite easy to snap in some GPUs and beging mining without any additional cost..
But there is also what I think may be a huge limitation since the power adaptor states that "the current usage shall not exceed 235W", or at least that's what I understood (pic below)

And I don't really know how profitable it would be to run graphic cards compatible with that power adaptor (and hence low mining/profit rate) [I don't know for sure but if I am not mistaken most hi-end graphic cards that are usually being used for mining require well over 500W adaptors]

So now comes the question.. What would the most cost-effective and profitable way to use these 19 workstations be? What kind of graphic cards,FPGAs or ASICs should I be looking for, to be compatible with them?

Or what would you do with these machines, if you were me?

I would like to employ them all within a couple of months, but at first, I think that I would be better off starting with 1 graphic card/FPGA/whatever you guys suggest, and see how it goes on a single workstation..

I'd also like not to spend over US$145 for this first "experiment"..

Thanks in advance to anyone that will take time to help me!

Thanks for all of your replies!


I don't think I would encounter any problem with the heat , since as I am based in Norway, and the average temperature outside where I live rarely goes over 12°C (53°F), I believe that it would be enough to just leave the nearest window halfway open, in the room I would designate to mining...

And as far as the power capacity goes, I don't really have any idea of what that may be, but I don't think that even the most power craving rigs would use up as much electricity as the 8x heaters [1500W/ea] I run during winter periods, along with the dishwashing machine (2000W), dryer (2800W),washing machine (1800W) and the electric stove (9800W).. [even though norway exports tons of gas, nothing is run by it strangely]

Anyway, I run into a deal the other day, where I managed to get 19 Lenovo workstations for free (they were throwing them away at the office), as per the pics below (some are missing from the image)

http://d.pr/BL9q+

http://d.pr/CrMy+


All of them are running on Intel Core 2 Duo processors clocked at 1.80GHz, and have RAM ranging from 512 to 2048MB.
They all also seem to have a free PCIe slot, as per the following pictures:

http://d.pr/UK5a+ (full size img)



http://d.pr/32Po+ (full size img)



And that's the really interesting thing, since I think that it would be quite easy to snap in some GPUs and beging mining without any additional cost..

So now comes the question.. What would the most cost-effective and profitable way to use these 19 workstations? What kind of graphic cards should I be looking for, to be compatible with them?

Thanks in advance again for any inputs...

Hi,

I was wondering whether or not it would be worth to invest in a mining rig/fpga or equivalent hardware , to be set-upped at home.

I currently got about 4-5k US$ in spare money , and I was wondering if in your opinion , it would be worth investing it into buying some sort of mining hardware of some kind..
Now, the power/electricity consumed isn't really a concern for me, since it's included in my rent bill, and I pay a fast fee and get unlimited usage, so I wouldn't have to pay attention to "ad-hoc energy sparing methods"...

Anyway, do you think that it would be convenient for me to invest that sort of money into mining hardware? And if so, what should I expect to earn (approximately of course) per day with 5k$ worth of mining hardware with the current difficulty rates [and maybe in a year or so of continued usage]?


Thanks in advance to anyone who will take time to answer, and sorry for the really newbie question , but I don't really have much idea of how the whole bitcoin ecosystem works - yet.

So I basically got hitted by some sort of system bug..

Technically that's not entirely my fault, if at all.. Sure, I could have used a more stable internet connection,and tested the address before sending the full amount, but still, blockchain should have displayed the address as not synced as the other users are saying on that post you linked...

Shame on blockchain ..
Even if this causes a somewhat huge problem for me (including the transfer fees, about 150$ vanished because of this f.in bug,and I was conducting the transaction on behalf of some acquaintances , and as a non-working student I don't have enough money left to counterbalance what just happened) , one and a half benjamin is still "nothing" for the bitcoin ecosystem..
BUT, the real problem is, what would happen if the same f.in bug, or something equivalent, made disappear 10000k+ bitcoins in some sort of bugged transaction?

Now , I suppose that the parts involved in an hypothetical  transaction of such epic proportions , would surely take lots of precautions... but still, this is anyway a real (and huge) problem!
And I could see people losing tons of money (not "just" 150$) because of this..

I guess I will never be using, nor reccomending blockchain anymore..

Too bad since I really liked the concept of "ewallet", but I guess that a client privately back-upped on Linux ->Dropbox/Google Drive will be the only thing I'll be using in future..

Or actually, does anybody know if someone is offering some sort of "bitcoin-insured "premium" ewallet"?
In otherwords, something that does have an OPPOSITE policy to the following:

(of course with a note specifying that any loss due to an user's negligence would not be accountable for)

I would be happy to pay for something like that...

Yeah , I am beginning to think that the sync process may be were the problem emerged.

What I think basically could have happened, is that I created that address using Firefox Aurora (bundled w/Tor Browser), and given the instabile nature of the Tor Network, what might have happened is that the address got created, but not synced to the server (even if it apperead to have been, given the not-presence of an "unsynced" warning like in this photo http://d.pr/f/7LOK) and since the Tor browser crashed shortly after, I'm thinking that the address I thought I was using for receiving my money just "vanished" as it never really existed in fact, given the not-working sync....

Could that be plausible ?



That, or maybe the issue is indeed on blokchain's side as you're saying (It seems impossible to me that an address would not sync, without a "not-synced" warning appearing)

Well, I really hope that the second option is the cause at this point...
I have sent an email to the blockchain admin, and I will see what he's got to say..

Yeah, you're right, I had somehow forgot of it being a "shared" e-wallet.. At least that one strange thing is accounted for..

Me neither, and thats why this seems absurd to me..
But thanks for the advice, I will definitely test out addresses at least one time and have offline backups from this day on..

I tried from a different computer but still no address and 0,0

And no, unfortunately I did not associate an email nor create an alias, as I was planning to use it as a "one-time/disposable" wallet (that was stupid I guess)

Yes, I am indeed running Windows, but it is a fresh install I did less than a week ago (I normally use OSX and various versions of Linux/BSD for my "everyday use") as I wasn't able to use the GPG encryption system on Linux, and needed a more "user-friendly/easy" way of doing it (and that's where the windows install came in)

But I did not download any questionable software which could potentially have contained  some trojan/"undesired extra addon"... so I don't really see how that could be possible...

I am running a complete scan now anyway...

Anyway, I managed to access the history of the browser I was using yesterday, and this is what I got up: http://d.pr/i/4d5m
It seems like I copied the link to the address I had just generated, and opened it into another browser (the one I was using, Firefox Aurora/Tor browser, seemed to no longer respond at all/sort of crashed)

So here is what I find rather strange.. If I go to that address I found in my log,  (https://blockchain.info/address/1Tcs13Fd6YXudzCx6vMjEmeZcC6LYTdxy , the one I sent the money to that had been generated from my wallet) (or at least seemed to have been) I can see my transaction (the 24.87 one) but the address it was sent from (per image: 15BBSAsoZAzq5GAey4wunoM42sQHkjiGrQ ) is not mine!

The one I did in fact send the transaction from was "1M9EVAxN1tNf9HsiRrRd7iEtpFYQGYWsT2" ,so how is it possible that 15BBSAsoZAzq5GAey4wunoM42sQHkjiGrQ  appears instead?

And also, if I go on the block chain explorer, and search my unique transaction code, I can see that the money I sent appears as "not redeemed yet" (image: http://d.pr/i/qR3A )
What exactly does that mean?


Thanks again to everyone that is trying to help me out ...

I am quite sure I didnt, I did at least a triple check .. And even if I did, shouldnt it  (the old address) appear in the archived ones?

Anyway I ve sent an email to the blockchain administrator.. but at this point I am beginning to think that I might be doomed..


Could the problem have arisen from me using the wallet from tor browser? And that maybe the connection fell  while the new addresses (the one I used included) were being generated, making it so that they did not get saved to my account or something?

But how in the world is it possible that 1Tcs13Fd6YXudzCx6vMjEmeZcC6LYTdxy was first generated into my blockchain.info account, and as soon as I sent money to it (and it still appeared  into my account)  I refreshed and it was gone?

Hi,
I've got a HUGE problem.
I don't have any idea of how this could possibly have happened , but my bitcoins practically just vanished into the air....

Here are the steps describing what I did:
1.I had 25 bitcoins trasfered from Intersango to an Instawallet address of mine. (and everything went well, they got there and were usable after 20 minutes)
2.I then created a new wallet on blockchain.info , and accesseded it, clicked on "receive money" , I then generated a few random addresses as a mistake, deleted all of them but two, copied one of the addresses left (1Tcs13Fd6YXudzCx6vMjEmeZcC6LYTdxy) and pasted it into the instawallet "send money" link.
3.Instawallet sent the money to the address I had 5 secs before copied from blockchain ,and I was quite sure everything was going all right.

But then, god, as soon as the transaction finished and instawallet market the whole thing as "sent" , I re-logged in into my  blockchain account, and well 0,00 bitcoins, I then thought, "mh, it's going to take a while", so I clicked again the "receive bitcoins" options, and HECK! the "receive" bitcoin address I sent the money to, that I had generated 1 minute earlier (1Tcs13Fd6YXudzCx6vMjEmeZcC6LYTdxy) into that wallet was no longer into my account!!! (here a screenshot: http://d.pr/i/8mB7)
And the "archived addresses" thing is 100% empty even though I had archived several of them (as I said earlier I had created quite some addresses as a mistake). (here a screenshot of the empty archived section http://d.pr/i/dJ5P)

I then got back to instawallet, and it said that the transaction had been sucessfuly sent ( screenshoot:http://d.pr/i/482Z) but hell!! (I am sorry for swearing but I am screwed if I can't get back my money) the address I sent the money to that a second earlier had been generated into my blockchain account, no longer existed there!!!!!

Just what the h. could have possibly happened?

Here is the transaction thing: http://blockexplorer.com/address/1Tcs13Fd6YXudzCx6vMjEmeZcC6LYTdxy and here  the code thing  " a5c69509ffc474ca5107fb2bf7d66fe12a5fa54cd200b6704c28e68738aeb92f "

Please help, I am really screwed if this doesen't get fixed..