The gzz gzz gzz sound of a dying fan is it spinning up, and then hitting some resonance frequency where it oscillates, causes a whole bunch of friction, and slows down. It is no wonder that the card is cool with a properly operating fan.

I thought I'd help you out, I put a little blue mark at the start of a new round. New round starts, 3-400Ghash of pool hoppers jump on the 180Ghash pool.

1022    29 Jan 17:10:46    49m 14s
1021    29 Jan 16:21:32    7h 16m
1020    29 Jan 09:05:05    1 h 13m
1019    29 Jan 07:51:25    8m 43s
1018    29 Jan 07:42:42    1 h 40m
1017    29 Jan 06:02:24    8h 32m
1016    28 Jan 21:30:14    4h 19m
1015    28 Jan 17:11:03    11m 40s

Why the pool hasn't changed payment systems, after six months of knowing this is a problem, is beyond me. I was mining here on block #6, but I have no interest in mining while there is a 20% "hopper fee" in lower rewards.

The reason why they still command as much (if not more) used as they were new, is that nothing else under $10,000 can do decals like them:

It is an interesting machine, it prints all of one color, then sucks the page back in and prints the next color. Can be finicky and slow to do a 7-color print job though...

The pool stats are delayed. Pool hoppers have ways of circumventing this. I don't know where you are seeing such stats, but it is probably that the hoppers know about a new round before you do, and "move out" once they have mined the profitable early shares.

You might investigate an Alps microdry printer. They don't use inkjet, laser toner, or dye-sub technology (although they do dye-sublimation with a different set of cartridges). The ink is on ribbons, and it is melted directly onto the media (which also lets you print white, foils, etc). I've made iron-ons that look like thick silk-screening and certainly go through the wash many times. Blatant plug: I could be talked out of my printer since I don't use it much.

An admin should run the password list against logins and see if they match (probably many more have been cracked since the original publication of passwords, they might be circulating in underworld circles). Also, inactive accounts that have email addresses on that list should be locked, with email confirmation to reopen (supposing the pwnd person didn't use the same pw on here, mtgox, AND email...)

Another trigger for investigation should be a password reset after long inactivity. Inactive, reset pw, post for loan: lock.

At least the original post gives absolutely no information about the system hardware, ensuring that any responses are as uninformative as possible...

Nvidia SLI chipset motherboard?

Here's an online diff of original phatk2 and yours, I'll check it out on my card that I've already done five-sig-fig benchmarking on. The kernel is from Phateus, you might update his kernel thread with your findings.

edit: You've done it - you now have the fastest kernel. 341.19 ⇒ 341.60 on a 5830 using the same parameters and simply using the new kernel. phatk2 at the below settings was the highest possible Mhash/s that could be extracted from the card previously.

Sapphire 5830 -2L @ 1050/380 (benchmarking core speed; peak phatk2 output @ core speed)
System OpenCL 2.5.793.1, driver 11.11, WinXP
kernel parameters: VECTORS AGGRESSION=12 FASTLOOP=False WORKSIZE=256

Not all cards have voltage regulators that can be changed by software - that is one of the first things to go when making an economy model. Others use a proprietary method for controlling hardware. I can't speak for that specific card though.

Raolo paper: http://bitcoin.atspace.com/poolcheating.pdf

The pool hopper, by simply hopping one pool (hopping off to PPS mining after 43% of difficulty shares) will earn 28% more. Note that this means the hopper spends more of his time PPS mining than mining on the proportional pool - the pool hopper earns his expected reward while backup mining, but earns significantly more than +28% per share while exploiting the pool, for a total earnings 28% higher. Leaving the pool even earlier (if you have many pools to hop) means the per-share reward of the miner in the exploited pool is even higher.

As a proof-of-concept, I submitted just a few shares to a pool at the very start of each round, quitting after 5% of difficulty. My shares on average were worth 4x more than expected.

The more hoppers there are, the less full-time miners will be able to submit shares into the profitable early window where a lucky block might be found. Enough hoppers on the pool, and full-time mining approaches the opposite of pool hopping, hardly submitting any shares before 43%, only able to submit after 43% of difficulty until the round ends.

If you need anecdotal evidence of full-time miner losses at a 2 hoppers per 1 fulltime miner proportional pool: https://bitcointalk.org/index.php?topic=10121.msg656033#msg656033 - and that is even with a minor anti-hop measure, delayed stats.

Too high too fast:

They sure don't.  Jesus. I'm done here.



"we store all the bitcoins sent to cold storage in a vault that is a faraday cage shielded to protect against something like this." Run, bitcoins, run!

#!/bin/bash
for i in {0..999..1}
  do
     echo "Wallet Copy $i..."
     cp ~/.bitcoin/wallet.dat /mnt/SDcard/wallet.$i
 done
echo "Just backed up wallet to SD card 1000 times.
echo "One of those will probably be good."

It doesn't take voodoo from the sky to knock out power to hundreds of thousands in a technology-dense area with newer infrastructure: http://www.king5.com/news/local/Puget-Sound-Energy-may-give-50-credit-for-outage-137957953.html
My guess is that the death toll doesn't include many bitcoins.

It is sad that NASA had to make a 2012 end of the world page explaining why dummies are.

This is what a typical early telegraph circuit looks like:


and at the end of hundreds of miles of very large gauge copper wire you had a sounder that looks like this (this is 1900, 40 years newer than the event):



At one end of the long wire there is a six volt battery, and a switch that connects it to the line. At the other is a sensitive electromagnet coil that makes a sound. They are both connected to earth ground. When nobody is pressing the key on the other end, the circuit works more like "antenna for picking up currents from magnetic fields, and channelling them through very fine wire in a small coil, until it burns". If there is a large induced current in the wire or a large ground potential difference, you don't need the battery - the current already wants to flow through the wire.


Now our long power lines carry 400KV instead of a few volts, and they have equipment at the end that looks more like this:

The priority doesn't change based on how deep in the queue it is. The priority number is based on a simple formula.
Unless the payment has a decent fee included, priority under 57,600,000 is low priority. The mainline Bitcoin client will prompt you to include a fee in low priority transactions to ensure they are processed, but the .0005 minimum fee is not enough to get most bumped up (although with any fee above that they should be quickly included in a block).

https://en.bitcoin.it/wiki/Transaction_fees

"priority = sum(input_value_in_base_units * input_age)/size_in_bytes"

Since when you send coins, the entire address balance is usually sent (with change sent back to you at a new address), this is typical:

priority = ((BTC address balance*100000000) * number of confirmations (weighted over all coins) / size of transaction message in bytes, usually around 300)

For example, send 1 BTC that has been in your wallet for 100 confirmations, in a 300 byte transaction:
100,000,000 * 100 / 300 = priority 33,333,333 = low priority

Priority is only a problem if you send with a 0 fee; see for example the 1VayNert withdraws from the Deepbit mining pool to it's clients: while Deepbit is happy to keep all the transaction fees of blocks they mine for themselves, they don't pay anything back out when sending you a payment, so it may be delayed for hours.

You must contact merchants that use PayPal shopping cards and tell them that you will never use PayPal because it is pure evil (likely the merchant has already experienced their accounts being locked multiple times randomly), but you will send them 10BTC worth $60 right now for their product, and it is safe, has no fees, and cannot be disputed once it is confirmed.
I have a product I wanted to buy, only one company is the US distributor, and as they are mainly on eBay, so even on their web site they ONLY take PayPal - perfect candidate for a "we can do business if you take Bitcoin" campaign.

I am interested in hearing more about uninstalling DLLs from Linux...


11.6/2.4 is the safest bet for beating the CPU bug.

The coronal mass ejection started interacting with Earth's magnetic field 12 hours ago, mass mayhem has not ensued. There is no predicted "superstorm", the sun goes through a normal 11-year cycle of activity.

Changing magnetic fields and moving charged particles can induce currents; however, solar storms are global-scale events, and the primary concern is the electrical grid. DC currents can be excited in power lines that normally carry AC-only, causing problems with transformers and substations. Your individual worries would be power bumps if substations automatically switch off or reroute the power grid, causing unclean power pulses or brownouts to your devices. A power conditioner is a high-end device that keeps a constant 240v to your devices - it is like a 240vac power supply that runs off the line current (most cheap battery backups don't do this - they only switch in during an outage or significant voltage drop). A surge suppressor keeps damaging voltage spikes from your devices. These happen primary from lightning strikes, but may happen from power grid malfunction, such as power lines sagging from the heat of carrying extra current and shorting on trees.