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81  Bitcoin / Bitcoin Discussion / Re: Data proves Bitcoins are dropping to 0 on: June 17, 2011, 04:01:55 PM
could possibly even hit negative value.
Please! Please! Take my my coins now! I will pay you 10% more to take my coins than what the other guy is offering!!
82  Bitcoin / Bitcoin Discussion / Re: Trojan Wallet stealer be careful on: June 17, 2011, 01:36:22 PM
I am trying to comprehend why in the Open Source community there is this prevalent attitude that if a security measure is not 100% foolproof then it is not worth the trouble to implement it. It is often further asserted that implementing these partial measures would be counter productive because doing so would give the average user a false sense of security leading to careless behavior in other areas.

The solution these people propose typically run along the lines of: "Secure your outer (Linux) shell!! You don't have to worry about anything else! You can now leave plain text sensitive data lying around your file system because Linux is inherently safe!" Roll Eyes Well, OK, not to that extent but you get the idea ....

Anyway, is it really that difficult to add an optional on-the-fly encryption to the standard client, with the keys stored in a removable smart card (or even USB stick for that matter)? No smart card inserted, no decryption. It should be possible to keep the client running accepting block information without the smart card inserted. The keys should also be based on a password, effectively giving you 2-factor authentication (password and physical device). This is not really complicated and should considerably reduce the attack surface.



83  Other / CPU/GPU Bitcoin mining hardware / Re: DVI / VGA Dummy Plug Thread on: June 16, 2011, 10:34:24 AM
For what's it is worth, in addtion to using 68 ohm and 75 ohm resistors (which are actually difficult to get because 75 ohm is not a standard resistor value), you can also use 82 ohm and 100 ohm resistors just fine. If you have 150 ohm resistors you can make 75 ohm resistors by connecting 2 x 150 ohm resistors in parallel.

I mention this because if you buy an assorted resistor pack from Radio Shack you don't just keep the 68 ohm resistors and throw away the rest.

If you are worried about blowing up your card, keep in mind that it is safer to go higher than 75 ohms rather than lower. 51 ohm resistors are also included in may resistor packs and those also seem to work, but because they draw measureably more current than 75 ohm resistors wouldn't recommend them.
84  Other / CPU/GPU Bitcoin mining hardware / Re: Xfire between 6950 and 5770 on: June 15, 2011, 11:34:58 PM
You can only crossfire cards of the same model. EG: two 5770's. You're going to have to use a dummy plug.
Actually it is slightly less restrictive. You should be able to crossfire cards with the same hundreds number, e.g 5830 and 5850 can be crossfired.
85  Bitcoin / Bitcoin Discussion / Re: the three doors problem, increasing the chance of finding the right hash on: June 15, 2011, 11:15:18 PM
In the Monty Hall scenario the host ALWAYS picks the wrong door, and you are using this particular piece of information it to your advantage by switching.

The pool cannot do this (only picks a random door).

Think about it for a moment.

EDIT: By always picking the wrong door he is artificially lengthening the game (the game never ends on round 2), making it a completely different problem/game than the pool.
86  Other / Beginners & Help / Re: How can you short sell Bitcoins? on: June 15, 2011, 03:29:23 AM
You need to find someone willing to lend you X bitcoins for Y months for a small fee (Z).

You sell the X BTC now and after Y months you but it back from the open market and give the guy back his X BTC + Z. You hope that you will be able to buy the X BTC back for something close to 0.
87  Other / Beginners & Help / Re: Bank to Dwolla transfer time. on: June 15, 2011, 03:22:49 AM
On the third business day ... bank is Chase in the US.

Transferring OUT of Dwolla seems to be 2 days (1 day faster).
88  Other / Beginners & Help / Re: Is BitCoinPlus a scam? on: June 15, 2011, 03:19:44 AM
I don't think it is a "scam", per se. Just a very inefficient way to get Bitcoins. Maybe it appeals to people who can't be bothered to figure out how to set up a CPU miner and join a pool?
89  Other / Beginners & Help / Re: Silk Road on: June 15, 2011, 03:04:24 AM
IMHO Silk Road is still playing an important role in holding up the value of BTC, at least at this time. The conversion from $ to BTC is a minor hassle for people looking to buy that kind of stuff. Unfortunately it still is a big hassle as far as buying legit merchandise from the few merchants who currently accept BTC.
90  Other / Beginners & Help / Re: Fan positioning on: June 15, 2011, 01:52:45 AM
Keep in mind that the higher end video cards shoot hot air out the back AND to the inside front of the case. You need to take this into consideration because depending on the design of you case hot air could accumulate in the front area of the case. In this case, it would be good to have a front fan located midway up the case blowing hot air OUT.
91  Other / Beginners & Help / Re: Dwolla? on: June 15, 2011, 01:43:00 AM
Dwolla seems like a pretty good deal.
Indeed. Where else can you make a $4,999 transaction for only $0.25 in fees.
92  Other / Beginners & Help / Re: Newbie needs advice on bitcoin mining on: June 15, 2011, 01:27:41 AM
1. Can an Asus Radeon AH4650 provide enough GPU power for me to earn enough money from mining to even bother with installing and running the mining software (which would be at least 15-20 $ per month) ? How much do you think I'd be able to earn per month (taking into account current mining difficulty and 20$ BTC price) if I ran it about 2/3 of the time in the whole month ? I saw one guy claiming to earn 20 $ PER DAY with one or maybe two cards only a little newer than mine (maybe 5xxx) two or three months ago... I'd be happy with a tenth of that !
I have an HD4650 on my home theater system and it mines at around 32 Mhash/s while consuming 55W (for just the card). I don't even bother to turn it on because it is not worth it for me. At current rates it would theoretically give you about $34/month in Bitcoins.

You could spend around $100 for a 5770 to replace your 4650 and get at least 6 times the mining rate at around 100W.
93  Other / Beginners & Help / How loud are dual/triple fan HD 6970's when mining? on: June 15, 2011, 01:07:41 AM
I am thinking of adding another mining rig. Unfortunately, I don't have any more space / amps left in the room that I use as my home office. The only place left is the bedroom, but I need to be able to sleep too!

I already have a setup with 2 x 6970 (reference design with 1 fan), and there is no way I could sleep through the noise. I also have a 2 x 5830 which seems just as loud. What I want to know is if anyone has tried mining with the 2 or 3 fan 6970 cards? Are they significantly quieter than the reference cards?

If so, any particular model you could recommend?

Thanks.
94  Other / Beginners & Help / Re: Introduce yourself :) on: June 15, 2011, 12:50:37 AM
Hello, my name is EpicFail. I have been mining Bitcoins for 2 months at approximately 1 Ghash/s. I had another forum login but I stopped using that one because in my prior posts I might have given up too much information about where I might be working. For various reasons, I think that it is not prudent for my employer to know that I am involved in Bitcoins. So here I am re-incarnated as a noob - going to be a little bit more careful about what I might say.

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