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1  Economy / Goods / WTS 2x6870 Rig $700 OBO on: November 19, 2011, 12:13:21 AM
I'm selling a rig I can no longer afford to run with my California electricity costs. Asking $700 OBO for a ~600 Megahash rig with these components:

CORSAIR Professional Series HX650 (CMPSU-650HX) 650W ATX12V v2.2 / EPS12V 2.91 SLI Ready 80 PLUS BRONZE Certified Modular PSU

AMD Sempron 140 Sargas 2.7GHz Socket AM3 45W Single-Core Processor SDX140HBGQBOX

Crucial Ballistix sport4GB 240-Pin DDR3 SDRAM DDR3 1600 Desktop Memory Model BL25664BA160A

Antec Nine Hundred Black Steel ATX Mid Tower Computer Case

ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard
2 x PowerColor AX6870 1GBD5-M2DH Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

Just plug in your USB thumb drive with linux installed and you're ready to go. I'll accept bitcoins or paypal for payment.
2  Bitcoin / Bitcoin Discussion / Re: Bitcoins are now Mobile and EASY - QR/Wallet/Android/iOS - MtGox Mobile on: September 21, 2011, 09:33:50 PM
I humbly ask for your forgiveness.  There were issues which caused delays in the implementation and testing of the application.  However, it's now ready and a temporary Cydia repository has been created:


Version 2.9 is available there.

Simply go to Cydia and add a new repository and you should be able to find it.  Thank you for your patience.


Rasengan, I tried this just a minute ago, and on my iPhone 4 running 4.3.3, it just hangs at the startup screen (the red "a" inside a triangle.) Is this a known issue? I've tried reinstalling and rebooting, as well as switching between wifi/3g...
3  Other / Beginners & Help / Re: How to Determine Fair Rate of Exchange For Bitcoin on: September 21, 2011, 09:26:29 PM
I would use the 24h average from bitcoinwatch

+1. This is probably about as good as you're going to do, realistically.
4  Other / Beginners & Help / Re: Hello I am new here on: September 21, 2011, 09:25:32 PM
Me too! Long-time lurker, trying to get more involved and post more actively...
5  Other / Beginners & Help / Re: HOWTO: create a 100% secure wallet on: September 21, 2011, 09:24:07 PM
Yep, this is a useful guide. Good stuff.
6  Bitcoin / Mining / Re: 2x 6870 - what are your settings? on: June 10, 2011, 05:39:25 PM
I've got my 2x6870's clocked at 975 core and each gets me 297 MHash/sec using hashkill on 64-bit ubuntu. From what I've seen/read, your numbers are pretty close to optimal at that clock speed on these cards. What kind of 6870's do you have?
7  Bitcoin / Mining software (miners) / Re: hashkill - testing bitcoin miner plugin on: June 10, 2011, 05:25:09 PM
Here is a data point for you.  Not sure if it is useful.

I have been using poclbm (up-to-date from git).  I decided to try hashkill for 24 hours to compare.  Here is what I found.

* The hash rate shown on screen was in fact higher with hashkill vs poclbm.  Close to 8% higher.
* % stale was not significantly better or worse (my pool supposes LP).  It was good with both (about 0.5%).
* However, the submitted share rate was significantly lower.  I understand that rate at which shares are found is driven somewhat by luck, but I feel like 24 hours of share data is long enough that a comparison is fair.  I collected data from two different machines running ubuntu:

Over two 24 hour periods:

Machine 1, 6850.  poclbm: 3974 shares, 195MH/s displayed.  hashkill: 3630 shares 201MH/s displayed.
Machine 2, 2x6970.  poclbm: 13256 shares, 670 MH/s displayed.  hashkill: 12270 shares, 710 MH/s displayed.

I can't explain this data.  But the reality is that I earned less on my PPS pool with hashkill.

I've noticed the exact same behavior, just haven't had time to conduct long time tests yet. hashkill had more hashes/s displayed, but just watching the pool statistics online it  always had less hashrate registered by the pool than phoenix.

that's why I switched back to phoenix for the time being, even though I really like hashkill (and expecially the fact that one process supports multiple gpus).

FWIW, I cannot reproduce what you two are seeing: when I compare the projected coins created per day given the hashrate hashkill displays with what I'm actually getting from my pool, it is accurate to .1 btc. So on my rig at least, it seems to be hashing at exactly the rate it's displaying. The same holds true for my poclbm instances as well when I compare those... (Just my .02 btc)
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