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Showing 20 of 153 results by bkpduke
Re: ANN: BITMAIN has Tested Its 28nm Bitcoin Mining Chip BM1382
A truly fantastic price would be 0.99 btc shipped, let's see if bitmain can do it
Updated the Difficultly vs Return chart.
Document with various hardware manufactures and estimated shutdown time.
https://docs.google.com/spreadsheet/ccc?key=0AmeuPljmUNHCdEpqX2RmMDFwemJyLURVUWFtZ3J3aGc&usp=sharing
Your spondoolies-tech prices are WAY off. And the SP10 is no longer available.
Now that the Spondoolies are installed, it's time to retire these miners.
All have been well-cared for and running in a datacenter (68F temps). Never overclocked.
The middle miner in the picture had a problem with a power connector, so I re-wired it with two. Valided and been mining since.
Looking for 0.4BTC/ea shipped to CONUS, or local pickup in Dallas, TX.
Buyer pays escrow fees if escrow is desired.
http://i.imgur.com/9eZ0NA8.jpg
All have been well-cared for and running in a datacenter (68F temps). Never overclocked.
The middle miner in the picture had a problem with a power connector, so I re-wired it with two. Valided and been mining since.
Looking for 0.4BTC/ea shipped to CONUS, or local pickup in Dallas, TX.
Buyer pays escrow fees if escrow is desired.
http://i.imgur.com/9eZ0NA8.jpg
Re: [ANN] Spondoolies-Tech - Best W/GH/s ratio, Best $/GH/s ratio
I want to ask some of the self proclaimed DC people who obviously know more than anyone.
Lets say you stuffed 32 SP10's into a rack leaving room for a switch up top. How many circuits would that one rack need? Hell how about you give me a AMP figure.
The SP products are bad ass but I think most of you have to much koolaid you are trying to hand out. You act like you are going to run these miners for years LOL! I kept stuff for no more than 2 months before sold and moved onto newer equipment.
Lets say you stuffed 32 SP10's into a rack leaving room for a switch up top. How many circuits would that one rack need? Hell how about you give me a AMP figure.
The SP products are bad ass but I think most of you have to much koolaid you are trying to hand out. You act like you are going to run these miners for years LOL! I kept stuff for no more than 2 months before sold and moved onto newer equipment.
We run a hosting company (don't ask, I won't colo your miners :p). On 208V circuits, we are seeing that each SP10 pulls 6.5A.
32 SP10 x 6.5A = 208A total.
That is AT MINIMUM 7 X 30A circuits for a single cab, leaving you zero margin for fluctuations. Most DCs won't let you pull more than 80% of the rated circuit.
Realistically, the power density is higher than most DCs will let you purchase, even those that advertise high power density.
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With all the above said, the SP10s are still the most power-efficient miners I have seen to date. For our hosting operations I have to buy power in bulk, so I simply squeeze one or two of these SP10s into a cab where I have power that is paid for, but not fully utilized.
Re: [ANN] Spondoolies-Tech - Best W/GH/s ratio - Shipping from stock
Spondoolies - got miners today and they are simply brilliant. Thanks a ton.
One question, what are the best settings in terms of difficutly level, etc.? I ask b/c I am seeing between 6-11% of errors on the shares mined.
Cheers.
One question, what are the best settings in terms of difficutly level, etc.? I ask b/c I am seeing between 6-11% of errors on the shares mined.
Cheers.
I think that 1024 should be ok. Give it a bit of time because usually errors are high at start but they level down in a couple of hours.
They have dropped a little bit, down to 4-6.5% in the past 24 hours.
Re: [ANN] Spondoolies-Tech - Best W/GH/s ratio - Shipping from stock
Spondoolies - got miners today and they are simply brilliant. Thanks a ton.
One question, what are the best settings in terms of difficutly level, etc.? I ask b/c I am seeing between 6-11% of errors on the shares mined.
Cheers.
One question, what are the best settings in terms of difficutly level, etc.? I ask b/c I am seeing between 6-11% of errors on the shares mined.
Cheers.
Re: [ANN] Spondoolies-Tech - Best W/GH/s ratio - Shipping from stock
Anyone found a good set of Rack Ears in the USA for these?
Spondoolies wants $25 per set, and that just seems a tad high. Standard rack ears on eBay are less than $10 shipped.
Spondoolies wants $25 per set, and that just seems a tad high. Standard rack ears on eBay are less than $10 shipped.
The rack ears were designed and manufactured specifically for the SP10
The $25 is mainly to cover shipping costs
Your website has two options for the rack ears:
No Shipping - FREE
DHL air freight + insurance - $193.00
Re: [ANN] Spondoolies-Tech - Best W/GH/s ratio - Shipping from stock
Anyone found a good set of Rack Ears in the USA for these?
Spondoolies wants $25 per set, and that just seems a tad high. Standard rack ears on eBay are less than $10 shipped.
Spondoolies wants $25 per set, and that just seems a tad high. Standard rack ears on eBay are less than $10 shipped.
Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***
Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu
I suspect this is the cause of all your problems right here
That's BARELY enough to power a full rig.I <3 anything Corsair in the 850W range for these guys.
I don't think that's true though. According to my power meter a full rig with v2.3 h-cards (the pci ones) is consuming 450 watts at 520 gh. 450 watts is at the wall of course.
But I still think that it would likely be better to give the power supply more room to breathe. Voltage ripple on the 12V rail is likely to occur more frequently at higher loads and the h-cards may not like this.
I think another solution would be to trim down the full rig by 4 h-cards. I was told by punin (from Bitfury Strikes Back -bfsb) that 12 h-cards is a more stable config.
Keep in mind that you are asking these PSUs to push all that power over the 12V PCI-Express power leads. They were NOT designed to do this. They were instead designed to push about 50% of their power over the main ATX connector to a motherboard. That is why you need PSUs that are spec'd far above what the actual power draw is on a full rig -- the 12V rails for the PCI-Express power leads were never designed with that in mind.
Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***
One thing that does suck about these rigs is that they do not run very stable when fully populated (ie all 16 cards installed).
This is very dependent upon power supplies. You need a beefy PSU with stable 12V rails in order to keep the amperage even to all 16 cards.
Hmm, do you have any recommendations. Believe it or not I'm running one full rig with a seasonic 550 watt 80 plus gold psu but I'm thinking of buying something more beefy. I have in mind the AX860 series.
Just pay close attention to the 12V rails. I am using a couple older PC P&C 750W PSUs, but these are not built anymore. I also have a 1KW Coolermaster Gold Series that I use to power two full rigs.
Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***
One thing that does suck about these rigs is that they do not run very stable when fully populated (ie all 16 cards installed).
This is very dependent upon power supplies. You need a beefy PSU with stable 12V rails in order to keep the amperage even to all 16 cards.
Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***
Why are the prize at MBP so overprized?
They aren't really overpriced. Very close to my target range right now. The difference with these are they are ready to ship right now vs the other companies that if you order from now you will not receive for at least 2 or 3 months.
The chips are also more efficient than antminer and avalon G2.
I doubt it. Antminers are running at 1.1V. If run at 0.9V Antminers would be almost as efficient as Bitfury. Check out Bitburner fury which run the chips close to 1.0V and the power consumption sky rockets to almost 2W/ GH/s
The Antminers are not even in the same ZIP code as the Bitfury chips in regards to power draw.
Here are my personal measurements on a 6 card Bitfury doing about 175GH/s sitting right next to a 180GH/s non-overclocked Antminer S1:
Antminer - 360W power draw (measured by Killawatt at the wall)
Bitfury - 185W power draw (measured by Killawatt at the wall)
If the pricing is the same, and you are deploying these en-mass, the Bitfurys save you a lot of $$$ in power.
Re: Why are people drawn to GHash.io, and how can we reverse it?
From a miner's perspective the main draws to ghash.io (if you own your own equip) are:
1) 0% pool fee (but orphans are not included)
2) merged mining
3) good user interface with alerts for individual miners, and the ability to track detailed stats
4) stability of payout - when the pool is larger like ghash.io, there is less variance in your daily payout due to bad luck of the pool
With the small margins on mining gear, even with the run up in BTC/USD, all of the above adds up, and every extra % helps.
I suspect miners would love to point their gear at other pools, but no other pool I have seen has everything else listed above. It is an attractive combination.
NOTE TO POOL OPERATORS: you want to compete with ghash.io, the above is what you need.
1) 0% pool fee (but orphans are not included)
2) merged mining
3) good user interface with alerts for individual miners, and the ability to track detailed stats
4) stability of payout - when the pool is larger like ghash.io, there is less variance in your daily payout due to bad luck of the pool
With the small margins on mining gear, even with the run up in BTC/USD, all of the above adds up, and every extra % helps.
I suspect miners would love to point their gear at other pools, but no other pool I have seen has everything else listed above. It is an attractive combination.
NOTE TO POOL OPERATORS: you want to compete with ghash.io, the above is what you need.
Re: [ANN] US/North American Bitfury sales now open ***full prototype pics***
My quick ROI calculation:
1) Free power (currently available to my miners)
2) BTC increases at a more modest 5% per month
3) Difficulty continues on approximately the same pace we have seen in the past 3 months.
4) I can OC these boards to a modest 30GH/s (my luck getting a STABLE 35GH/s has been poor).
http://mining.thegenesisblock.com/a/867974c2e5
I make $4 after a year, BEST CASE scenario.
I'm bowing out this round, not worth it.
1) Free power (currently available to my miners)
2) BTC increases at a more modest 5% per month
3) Difficulty continues on approximately the same pace we have seen in the past 3 months.
4) I can OC these boards to a modest 30GH/s (my luck getting a STABLE 35GH/s has been poor).
http://mining.thegenesisblock.com/a/867974c2e5
I make $4 after a year, BEST CASE scenario.
I'm bowing out this round, not worth it.