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201  Other / CPU/GPU Bitcoin mining hardware / Consensus on most efficient GPU in terms of hashes per kw? on: December 16, 2011, 05:40:20 PM
My farm is now nearing physical capacity, both in terms of space and power load. 

It is readily apparant that the only way to push my hash rate beyond 14,000 MH/s will be through more efficiently utilizing space/power. 

Is there a consensus on what the most efficient GPU's are in terms of hashing power per kw consumed, as well as hashing density? 

I know that 5830's are awful, and that 5970's are pretty awesome.  Beyond that I am having trouble finding information. 


Any help is greatly appreciated! 
202  Economy / Goods / WTS Sapphire 5830 *SOLD* on: December 14, 2011, 09:46:40 PM
Used for literally 2 weeks.  Replaced it with a 5970 and never looked back!

Looking to get 28 BTC.  Includes shipping, domestic USA only.  
203  Economy / Goods / WTS Xeon X5650 Westmere 2.66GHz on: December 14, 2011, 09:42:43 PM
I have a used 6-core Xeon processor that is no longer needed. 

10 months old, used in an SBS 2008 server. 

This is the exact chip:   http://www.newegg.com/Product/Product.aspx?Item=N82E16819117231

Asking 250 BTC.  Included shipping.

Thanks!
204  Economy / Goods / WTS Xbox360 - 4GB *SOLD* on: December 14, 2011, 09:38:19 PM
I have a brand new, sealed in-box Xbox 360.  It is the 4GB version that comes with one controller.  

I already have 2 in the house, do not need a 3rd.

Looking to get 55 BTC, includes shipping.  Domestic USA only.  


UPDATE:  Xbox has been sold.....thanks for the inquiries! 
205  Economy / Goods / WTS (3) XFX 5770 on: December 14, 2011, 09:35:00 PM
I have 3 XFX 5770's for sale.  Used for 2-3 months at 850 Mhz (factory). 

Great little cards, especially if space is an issue. 

They are this version:  http://www.google.com/products/catalog?q=xfx+5770&um=1&hl=en&biw=1280&bih=683&ie=UTF-8&tbm=shop&cid=8470602093636041539&sa=X&ei=uxPpTq3eA-jWiALGpdCXDA&ved=0CKQBEPMCMAQ#

Looking to get 30 BTC ea.  Includes shipping, USA domestic only. 
206  Economy / Goods / WTS MSI R5770 HAWK on: December 14, 2011, 09:32:34 PM
Before I post it on Ebay, figured I would offer it to the forum. 

Was used for 3 months at factory clock.

All original packaging included.


Looking to get 28 BTC, which includes shipping.  Will only ship demestic USA. 
207  Economy / Services / Anyone interested in a 30 day, 13,000 MH/s mining contract? on: December 08, 2011, 05:43:18 PM
Looking for someone who wants to rent out some serious hashing power. 

30 day term, 13,000 MH/s garaunteed, peak speeds are higher.

The price is 360 BTC, which is just slightly below the expected pay-out at current difficulty.

As I see it, the buyer would be making a bet on luck and difficulty.  If they get lucky, and if difficulty drops during the contract, good money could be made.


Let me know!!
208  Bitcoin / Mining / Overclocking 5850 on: November 24, 2011, 06:32:38 PM
Hey all,

I realize I will get some crap for this.....but what is the best program to overclock some 5850's?

I just picked up 5 on the cheap, and the most I can get out of them on MSI Afterburner is 775 MHz.  They are XFX brand.

My Saphirre 5850's have no problem hitting 900 MHz.  Am I doing something wrong?  Do XFX not go higher than 775?

thanks! 
209  Economy / Securities / Now seeking investors for BitCorp Mining Company [Now pushing 40 GH/s!] on: September 23, 2011, 07:33:11 PM
nt
210  Bitcoin / Bitcoin Discussion / Publicly traded mining business? on: September 20, 2011, 06:55:35 PM
This is an idea I have been toying with for sometime, and I would like to put it out there for discussion.  I know that a lot of the trolls will come out to belittle and tell me how stupid I am.....but I am hoping to recieve a fair amount of constructive feedback from intelligent forum members.

Let's assume for a moment the following entity exists:

BitCorp Mining Company

Bitcorp Mining Company (BitCO) owns and operates an extensive network of Bitcoin miners.  The main priority of BitCO is to ensure seemless operation of its current capacity, while strategically growing capacity when cost effective.  BitCO generates revenue through the production of BTC, as well as signing an occasional mining contract.  BitCO incures expenses from electricity usage, expansion of operations, and maintenence.  Currently, BitCO generates more BTC per month than are need for expansion, thus has significant free BTC flow.




Much like a gold mining company, BitCO owns a resource(a claim on future block discovery), there is a market for the resource, and thus there is value in the future claim. 

I think it would be tremendously cool for BitCO to have an IPO, have shares that are publicly traded, and pay dividends (in BTC) on those shares.

I imagine it would work something like this:

1)  BitCO issues 100 shares of stock.
2)  Stock is priced using a dutch auction to ensure fairness
3)  BitCO commences operations as a public entity
4)  BitCO begins declaring, and paying, monthly dividends

Let's assume that the shares are priced at 5 BTC per share.  Further, assume a conservative dividend policy that would pay out half the BTC production.  Thus, each share would pay a monthly dividend of .75 BTC.  That is a hell of a return on investment, especially given the current pay-back on new GPU's.

In my mind, the shares would quickly appreciate in value and settle somewhere in the neighborhood of a 10% dividend yield. 

I think it would be a great alternative for many people, rather than setting up their own mining operations and hassling with the well known issues of mining. 



OK, here is where I ask for feedback, and help in filling in the gaps.  I know this is rough, and very theoretical.....just looking to start a constructive dialogue. 
211  Economy / Goods / 3 machines, 1 GH/s on: September 14, 2011, 04:37:57 PM
What is a reasonable price to ask for 3 PC's that hash at a combined 1 GH/s?

All have fully licensed copies of Windows XP, are properly set up to mine using GUIminer, and are "turn on and forget" ready. 

the GPU's are 6950(shader mod), 6950, and 5770.



I really have no clue what the going rate is for mining rigs at the moment.  If it is worth my time, I will post pictures and entertain some bids. 
212  Bitcoin / Bitcoin Discussion / Price sensitivity on: September 09, 2011, 05:13:04 PM
It looks like we have reached a point (with BTC around $5-6) where marginal miners really start to shut it down.

Just watching the Deepbit hash rate the last couple days has shown a drop of almost 600 GH/s!  That is a massive amount of mining power going by the way-side.

I think it will be interesting to see if that is a permanent loss of miners (ie, selling their equipment), or if most will stand by, and turn them back on at higher prices. 

I suppose the silver lining is that my 10,000 MH/s now comprises a larger slice of the pie.  More BTC for me! 
213  Other / CPU/GPU Bitcoin mining hardware / 5970 core usage on: September 08, 2011, 01:44:32 PM
I have several 5970's, and all of them except one are working great.  The one in question seems to only want to let one GPU work 100%.  The other hangs out at around 70%.  Thus I am left with one core hashing at 350 MH/s, while the other only gets 250.

Has anyone else run into this problem?  Any suggestions? 
214  Economy / Services / 9,000 MH/s rental on: September 06, 2011, 07:18:59 PM
I own a mining operation that hashes at the ridiculous rate of 9,000+ MH/s, and gets closer to 10,000 MH/s in the evening.  Over the last week I have averaged over 9,000 MH/s.  I am willing to rent out this "farm" to interested parties.  
  

Terms are as follows:

1)  7 day contract
2)  Guaranteed 9,000 MH/s average over the contract term
3)  MINING WILL BE DONE AT MY CURRENT POOL, you will merely recieve the pay-outs.  I will set auto payment for every 2.5 BTC
4)  Any increase in mining power over the contract is yours, gratis.  (I still have a few GPU's to put to work)
5)  Payment is to be made half in advance, half at the midpoint of the contract.  

Price:  32 BTC


My terms are firm, please DO NOT ask for something different.  If no one is interested, I am glad to keep hashing away and keeping the BTC myself.  

If you would like to purchase this contract, reply with your BTC address and send your initial payment (16 BTC) to my address (which can be found below).

Thanks!  


Please read this as well!

Since I have begun offering these contracts, the difficulty level has fallen SIGNIFICANTLY, and my hashing power has grown.  I now average over 11,000 MH/s.

Given these new circumstances, the price for a 7 day contract is now 55 BTC.  I am pricing this based on an assumed difficulty of 1,250,000 (which should be very close to where the next adjustment will be).
215  Economy / Services / Mining contract - 8,000 MH/s on: August 23, 2011, 06:17:37 PM
I am going to try this again.....my last offer led to confusion and bizarre counter-offers.  


I own a mining operation that hashes at a minumum of 7,500 MH/s, and gets closer to 9,000 MH/s in the evening.  Over the last week I have averaged just over 8,000 MH/s.  I am willing to rent out this "farm" to interested parties.  
  

Terms are as follows:

1)  7 day contract
2)  Guaranteed 8,000 MH/s average over the contract term
3)  MINING WILL BE DONE AT MY CURRENT POOL, you will merely recieve the pay-outs.  I will set auto payment for every 2.5 BTC
4)  Any increase in mining power over the contract is yours, gratis.  (I am continually adding GPU's)
5)  Payment is to be made half in advance, half at the midpoint of the contract.  

Price:  26 BTC


My terms are firm, please DO NOT ask for something different.  If no one is interested, I am glad to keep hashing away and keeping the BTC myself.  

If you would like to purchase this contract, reply with your BTC address and send your initial payment to my BTC address (which can be found below).

Thanks!  


UPDATE:  I have sold this contract.  I am considering selling another 7 day contract upon completion of this one.  If interested, feel free to respond or PM. 
216  Economy / Services / Anyone interested in 7 GH/s? on: August 16, 2011, 03:55:33 PM
I have built a nice little farm with 7,000+ MH/s. 

I am willing to rent it out on a 30 day contract for $1,000.  Anyone interested? 

217  Bitcoin / Bitcoin Discussion / has ANYONE recieved a withdrawal from Tradehill yet? on: August 15, 2011, 09:12:37 PM
They were supposed to begin working through the backlog starting on Friday.  Has anyone seen movement on pending withdrawals? 

Mine has shown "in process" for over a week, and still does.  Just wondering if any progress is being made, and I don't want boilerplate from the people who run TH. 
218  Bitcoin / Bitcoin Discussion / comments please! on: August 09, 2011, 10:02:05 PM
https://bitcointalk.org/index.php?topic=36030.0
219  Economy / Marketplace / Mining contract/Rig hosting on: August 09, 2011, 09:32:38 PM
I would like to offer what I feel is a unique service, and one that I have not seen on the forums.

I will host your mining rig for a flat monthly fee based on MH/s.  This fee would include power, guaranteed uptime, and a secure location.  The miner would be pointed at a pool of your choice, so you can verify the work being done as agreed upon. 

The advantages I see to you:  greatly reduced power bill, no headaches with cooling, simplified mining experience. 

The advantages for me:  I monetize my access to cheap power, fiber internet, and class A hosting space. 


Essentially I am in a position to arbitrage my cost advantage, and take a little profit for my trouble. 


Would anyone be interested in this?  I think I can offer the service for $50 per month, per 1,000 MH/s.  I am looking for feedback as well as interested parties.  I think this would be a valuable service for anyone who lives in an area with high power cost.

thanks for reading. 
220  Bitcoin / Bitcoin Discussion / Building a Bitcoin business - best practices suggestions on: August 08, 2011, 08:00:02 PM
It seems to me that the biggest hurdle to more people adopting BTC is the issue trust.  How does one know if a merchant is reputable?  We all know that when we go to Amazon.com and send them money, the product we ordered shows up like clockwork in a few days.  There is no question as to the soundness of the transaction. 

With this being said, does anyone have good ideas on how to foster such trust in a newly launched BTC business?  Do you start by doing very small transactions in order to build up a rep?  Do you participate in the forums extensively so people are comfortable with your organization? 

Any ideas are welcome.....it seems like a very difficult problem, and one that has yet to be really addressed.
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