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141  Economy / Securities / [GLBSE] Bitcorp Mining Company - BTCMC 60+ GH/s, clear ASIC upgrade path. on: June 04, 2012, 07:19:44 PM
nt
142  Bitcoin / Mining / Another 2 BTC bounty for CGminer and BFL singles! on: May 30, 2012, 11:16:11 PM
OK, I have 2 systems each that run 3x BFL singles.  I am trying to add a 4th, and I keep crashing CGminer. 

The .bat file that works is this:

C:\Users\user\Desktop\cgminer-2.4.1-win32\cgminer.exe -S COM3 -S COM4 -S COM5

when I add the new single, and add the port scan, it looks like this:

C:\Users\user\Desktop\cgminer-2.4.1-win32\cgminer.exe -S COM3 -S COM4 -S COM5 -S COM 6


When i try to use that second .bat file, CGminer crashes after scanning the ports. 

Any help that fixes this problem gets 2 BTC!!
143  Bitcoin / Bitcoin Technical Support / [5 BTC Bounty] Tutorial for getting my first BAMT rig working on: May 30, 2012, 01:49:10 AM
Here's the deal:

I am a complete ignoramous when it comes to Linux and BAMT.  I have been all windows my whole life.

I do not want to read through 98 pages to figure it all out on my own, I would rather pay someone for a concise, step by step guide to getting my latest rig hooked to a pool and hashing.

Things i have already done:

-written image to flash drive
-successfully gotten to splash screen
-currently sitting at a prompt User@bamt-miner:~$


I have a single 7970 on the MOBO, but would like to add 2 more once I get the one running.

First person to get me up and running gets the bounty.

THANKS IN ADVANCE!!
144  Economy / Services / 32,000 MH/s mining contract - 14 day term on: May 24, 2012, 10:38:47 PM
Price:  270.00 BTC  now 265 BTC

Expected value: 283.20 BTC


Details:  Payouts will be on day 8 and day 14, for the prior 7 days mining output.  I garauntee a MINIMUM of 32,000 MH/s for the entire duration of the contract, but it will most likely be more.  

First come first serve.....this is a one time offer, will not do multiple contracts at this time.  
145  Economy / Computer hardware / [WTS] 2X MSI 5870's - perfect on: May 24, 2012, 06:04:42 PM
Looking for 85 BTC shipped for the pair. 





Both hash away easily at 420+
146  Bitcoin / Mining support / Problems running 3+ GPUs (bounty) on: May 24, 2012, 02:00:04 PM
I seem to have consistent problems running more than 3 GPUs (3 cards that is....I have many 2x 5970's working) in a single system.

Whenever I add a 3rd graphics card to a system, they almost always blue screen on me.  It does not seem to matter what brand of MOBO, what type of GPU, etc.  I use Win7, mostly 64 bit. 

Has anyone else had issues like this? 

I would really like to figure out what is going wrong, as I could increase my density greatly by making use of the idle PCI slots. 

Thanks in advance. 


PS - as a sweetener, anyone who gives advice that leads me to getting a 3+ GPU system stable will get a 5 BTC bounty. 
147  Bitcoin / Mining / general megahash to shares relationship? on: May 22, 2012, 03:52:04 AM
Does anyone have a good approximation for a MH/s to shares conversion?  Say I have 10 GH/s.....how many shares would that produce in 1 hour? 
148  Bitcoin / Mining support / 2 BTC bounty - CGminer and bitforce on: May 22, 2012, 02:21:20 AM
2 BTC for the best and quickest tutorial on how to get a bitforce single working with CGminer 2.4.1

Win 7 64 bit


thanks!
149  Economy / Securities / Announcing GLBSE listing for Bitcorp Mining CO. on: May 09, 2012, 05:33:28 PM
We are pround to announce that after 6+ months of successful operation, we have finally opened investment to the general public on GLBSE.  

Ticker symbol:  BTCMC

Dividend rate is currently .125 BTC per share, per month.  There is considerable room for increasing the dividend, and we intend to raise it significantly in the next 30-60 days.  

Please ask any questions you might have, and looking forward to having more of you on board!

More info on the company here, including financial results:  https://bitcointalk.org/index.php?topic=45438.0
150  Economy / Goods / [WTS] Dirt 3 coupons on: April 26, 2012, 05:04:09 PM
I have been accumulating a stack of these damn things, and I have no need for them.

I probably have around 20.....would love to get them off my desk.

Someone told me they go for 8-10 bucks on ebay?  I will offer them for 1 BTC each here.

Just take the dame things!!

BUY BUY BUY!!
151  Economy / Goods / [WTB] High density mining rig on: April 16, 2012, 09:56:59 PM
I am looking to purchase a a couple high density (think 2 GH/s) mining rigs that are rock-solid stable. 

I am not tied to any given configuration, and am not picky on specifics.  I just want it to work, and work a long time.  It must be nearly maintenence free as I will not be able to baby-sit. 

SO, if someone is looking to get out of the mining game now that the warmer temps are here, lets talk! 

152  Economy / Computer hardware / [WTS] Radeon 6870X2 on: April 16, 2012, 04:20:26 PM
I have 2 brand new, never opened, still sealed (get the idea?!) Radeon 6870X2's.

These things are a great alternative to used 5970's in terms of hashing density.  Each core will get over 300 MH/s with the right tweaks, and the dual fan set-up is quieter and keeps the GPU's cooler than a 5970.  

Looking for 70 BTC each, includes shipping.  

I would post a picture, but I would just be posting pictures of the boxes.....

153  Other / CPU/GPU Bitcoin mining hardware / Will it mine?!?! on: April 11, 2012, 08:06:11 PM
Inspired by "will it blend", I present my first entry:

http://www.ebay.com/itm/CADENCE-Incisive-Palladium-FPGA-EMULATION-2-stations-/260836233073?pt=LH_DefaultDomain_0&hash=item3cbb0d0f71

Will it mine?!?!
154  Other / CPU/GPU Bitcoin mining hardware / 6990 question on: April 11, 2012, 01:42:04 AM
what is the general consensus on 6990's?  Are they reliable miners?  Power consumption too high?  Are they needing constant attention?

Just started in on my first ones, and I am looking for some info.
155  Bitcoin / Bitcoin Discussion / Help me structure a futures contract (potential bounty) on: March 30, 2012, 04:12:05 PM
I will soon be taking on a large BTC denominated loan, which will be paid back over 5 years.  Obviously, if the price of BTC spikes within that time frame, I am exposed to massive exchange rate risk.  I earn in dollars, but must convert to BTC to pay back the loan. 

I am only interested in guarding against a spike in the exchange rate, not a decline, as that would benefit me as the debtor. 

Bitcoinica offers their trading service with 10:1 leverage, and it seems to me this offers a decent way to hedge away most of my exchange rate risk.  Is it as simple as taking a leveraged long position in BTC equal to my loan amount?  Then the gains from the leveraged long position offset the fact that I am having to pay more dollars for my loan repayments?  Is the only risk if I get stopped out on the downside right before a massive price spike? 

I have extensive professional experience with equity and options trading, but nearly none at all with leveraged futures or BTC speculation.  Anyone that could help explain this further, and point out pitfalls would be greatly appreciated.  Paticularly informative posts will be rewarded with a small bounty, comensurate to the value I find them to provide. 

Thank you in advance!
156  Other / CPU/GPU Bitcoin mining hardware / mining with 6870 X2 on: March 29, 2012, 03:07:35 PM
Anyone mining with the dual GPU 6870x2 cards? 

What kind of hash rates are you achieving?  What kind of power draw? 


By my rough math it seems like one could expect to easily achieve 600 MH/s+.  With the current prices, seems like a great alternative to the more expensive cards out there. 
157  Bitcoin / Mining / Using a 220V wash machine outlet for power..... on: March 29, 2012, 02:06:09 PM
So I have this fantastic utility room with lots of space, great ventilation, and a big ole 220 volt outlet. 

I would like to set-up some miners in this room, but I want it to fit in seemlessly with my wife's lovely (and massive) front loading spaceship looking washer and dryer. 

Anyone have some experience splitting the power outlet so multiple appliances can be hooked up?  I really dont want to have to switch back and forth everytime we have to do laundry. 

It would be great to run the miners off of the same outlet without doing too much re-modelling!

Any advice would be great. 
158  Other / CPU/GPU Bitcoin mining hardware / Got me a Kill-a-watt and some 7970's..... on: March 28, 2012, 12:20:44 AM
Finally made the plunge on a Killawatt....what fun!

I don't know if this is unprecedented, but I was able to overclock AND undervolt 2 of my 7970's and drop the power consumption by a huge amount.

my settings:

Core voltage:  1060
Clock:  1125
Mem:  685

This was pretty stunning to me, but I am getting 1300+ MH/s @ 300+- watts.

4.33 MH/watt.

Now I realize this is not impressive when compared to massively undevolted and underclocked GPU's, but this is a massively OVERCLOCKED set-up!  As a bonus the temps droppe a good 5 degrees with the same fan speed.

Just throwing it out there.....I was pretty thrilled.  I will report back if it stays stable for 24 hours. 

 

159  Bitcoin / Mining / 3 BTC bounty for the best assistance! on: March 27, 2012, 07:29:41 PM
Hey all,

Those of you who have been around for a while probably are somewhat familiar with my operation at this point.  For those of you who are not, here are the broad strokes:

I run 25+- miners in 3 different locations, pushing a total of 23,000 MH/s.  All 3 locations are on standard 110v outlets with 20 amp breakers.  This has been great so far, aside from the occasional breaker tripping.  At this point, I am running up against the limits of what I can comfortably and feasibly fit in the space I have access to.  Temperatures are becoming a problem (thought not bad at all), but more importantly I am pretty much maxed out on power draw. 

This has led me to start negotiating a lease on some commercial space (holy shit is is cheap still!), where I plan on moving some miners, and also adding others in a high efficiency set-up.  This is where the bounty comes in!

What I need instruction/help/assistance with:

-Some discussion on 110v vs 220v power.  I have limited knowledge here, and would love a good paragraph or two on advantages, ease of implementation, pitfalls, etc.

-Phase 3 power discussion.  A lot of the listings I looked at had this as a feature....I do not want to research this, and would rather pay a bounty for someone to sum it up with common English. 

-AC cooling.  For those of you working in enclosed spaces....I realize it is almost impossible to cool a sizable farm on AC alone without venting the waste heat.  With venting, how much AC power would one need to properly cool a 15-20 GH/s installation?  Square footage would be around 800. 


I might add more later, and increase the bounty accordingly. 

Also, I realize this info is available all over the forum, but I do not have the time to go crawl through all the topics and sift out the good stuff. 

THANKS!!!
160  Other / CPU/GPU Bitcoin mining hardware / 7990 revealed..... on: March 26, 2012, 06:03:18 PM
http://www.maximumpc.com/article/news/dual-gpu_radeon_hd_7990_graphics_card_exposes_itself


FWIW.....seems like it goes from delayed to confirmed to cancelled to confirmed on a weekly basis.  

That being said, slap some waterblocks on one of these badboys, and you got yerself a 1.5 GH/s card.  
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