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Re: What happens when bitcoin mining is obsolete (who will verify the transactions?)
Bitcoin mining verifies transactions on the block chain. Eventually people might stop doing this once the mining reward becomes too small or once mining is over 100+ years from now.
Would advanced mining (quantum) solve this making only a few miners necessary to verify transactions?
What are your thoughts?
Would advanced mining (quantum) solve this making only a few miners necessary to verify transactions?
What are your thoughts?
Assuming bitcoin survives that long, the ining of new coins will be replaced by transaction fees. The miners can choose whatever transactions they want to add to the block, so they may choose to not add any transactions where the fee is less than 1% of the amount transferred or whatever.
There will never be a time where "only a few miners" are necessary - then "a few" other miners could do a doublespend (51% attack). This is why so much hashpower is needed - now to do a 51% attack you would have to obtain 23PH/s (in case you manage to convince existing miners to help you) or 45PH/s (in case you have to buy new equipment).
Re: Technobit HEX8A1 260GH/s Coincraft based miner reviewed
Fair point, but still quite some difference in price and it looks like these need a controlling computer of some description adding to the power overhead unless we talking pi of course 
Depending on the number of miners. I have 3x HEX8A1, 3xHEXB and 1xBFL60, combined they use about 1.3kW, a 100W or so for the control PC is not that much in context. OTOH, for a single HEXB the PC would use too much power.Re: Butterfly - Powersupply has an incredibly poor quality
With active PFC it's even worse - the big cap fails followed by huge voltage spikes and a shorted transistor (followed by the circuit breaker tripping).
So, I guess I will replace the caps with good quality ones in my BFL PSU (I am not using it currently, it is more of a backup or if I ever need a 13V PSU).
Quote
Power plug is not a typical IEC connector
It is standard though - the plug is C5 and the socket is C6. These are very common in laptop power supplies.So, I guess I will replace the caps with good quality ones in my BFL PSU (I am not using it currently, it is more of a backup or if I ever need a 13V PSU).
Re: [ANN] Technobit HEX8A1 - 130/260 GHs Coincraft A1 board-499/867 EUR March
I have received my devices, will plug them in after I get home from work.
EDIT:
I have connected them (used a brand new Corsair CX750 PSU for the two HEX8A1 miners) and they all work. I have replaced the 4 port hub with a 7 port hub (this one even has diodes so that the HEXB miners do not backfeed the power to the PC). However, one of the HEX8A1 has 5% HW errors:
1. Is there a way to reduce the overclock on that particular device, while keeping it on the other two?
2. Do these devices report their temperature? If so, how can I see it?
But yea, the heatsink arrangement makes it difficult to place the miners so they do not blow hot air into one another or other miners...
EDIT:
I have connected them (used a brand new Corsair CX750 PSU for the two HEX8A1 miners) and they all work. I have replaced the 4 port hub with a 7 port hub (this one even has diodes so that the HEXB miners do not backfeed the power to the PC). However, one of the HEX8A1 has 5% HW errors:
Code:
cgminer version 3.12.3 - Started: [2014-03-07 18:15:15]
------------------------------------------------------------------------------------------
(5s):1.016T (avg):876.6Gh/s | A:181613 R:160 HW:17 WU:1999.8/m
ST: 4 SS: 0 NB: 1 LW: 208536 GF: 0 RF: 0
Connected to stratum.mining.eligius.st diff 512 with stratum as user xxxx
Block: 702b1b62... Diff:3.81G Started: [18:15:15] Best share: 6.58M
------------------------------------------------------------------------------------------
[P]ool management [S]ettings [D]isplay options [Q]uit
HEXb 0: 540 900/ 910mV | 47.16G/47.48Gh/s | A:12592 R:64 HW: 0/0.00% WU: 663.5/m
HEXb 1: 540 900/ 904mV | 42.62G/43.63Gh/s | A: 4320 R:64 HW: 0/0.00% WU: 609.5/m
HEXb 2: 540 900/ 900mV | 50.97G/47.54Gh/s | A: 9408 R:32 HW: 0/0.00% WU: 664.4/m
HEX8 0: 260 1000/ 946mV | 368.0G/232.6Gh/s | A:48431 R: 0 HW: 0/0.00% WU: 19.6/m
HEX8 1: 260 1000/1003mV | 466.6G/221.0Gh/s | A:46511 R: 0 HW:17/5.40% WU: 19.9/m
HEX8 2: 260 1000/1004mV | 461.7G/286.9Gh/s | A:60351 R: 0 HW: 0/0.00% WU: 23.8/m
------------------------------------------------------------------------------------------
[2014-03-07 18:29:36] Accepted 78a99991 Diff 543/512 HEX8 2
[2014-03-07 18:29:38] Accepted 02cde5ed Diff 23.4K/512 HEX8 0
[2014-03-07 18:29:40] Accepted 136d7087 Diff 3.37K/512 HEX8 2
[2014-03-07 18:29:42] Accepted 40d662b1 Diff 1.01K/512 HEX8 1
------------------------------------------------------------------------------------------
(5s):1.016T (avg):876.6Gh/s | A:181613 R:160 HW:17 WU:1999.8/m
ST: 4 SS: 0 NB: 1 LW: 208536 GF: 0 RF: 0
Connected to stratum.mining.eligius.st diff 512 with stratum as user xxxx
Block: 702b1b62... Diff:3.81G Started: [18:15:15] Best share: 6.58M
------------------------------------------------------------------------------------------
[P]ool management [S]ettings [D]isplay options [Q]uit
HEXb 0: 540 900/ 910mV | 47.16G/47.48Gh/s | A:12592 R:64 HW: 0/0.00% WU: 663.5/m
HEXb 1: 540 900/ 904mV | 42.62G/43.63Gh/s | A: 4320 R:64 HW: 0/0.00% WU: 609.5/m
HEXb 2: 540 900/ 900mV | 50.97G/47.54Gh/s | A: 9408 R:32 HW: 0/0.00% WU: 664.4/m
HEX8 0: 260 1000/ 946mV | 368.0G/232.6Gh/s | A:48431 R: 0 HW: 0/0.00% WU: 19.6/m
HEX8 1: 260 1000/1003mV | 466.6G/221.0Gh/s | A:46511 R: 0 HW:17/5.40% WU: 19.9/m
HEX8 2: 260 1000/1004mV | 461.7G/286.9Gh/s | A:60351 R: 0 HW: 0/0.00% WU: 23.8/m
------------------------------------------------------------------------------------------
[2014-03-07 18:29:36] Accepted 78a99991 Diff 543/512 HEX8 2
[2014-03-07 18:29:38] Accepted 02cde5ed Diff 23.4K/512 HEX8 0
[2014-03-07 18:29:40] Accepted 136d7087 Diff 3.37K/512 HEX8 2
[2014-03-07 18:29:42] Accepted 40d662b1 Diff 1.01K/512 HEX8 1
1. Is there a way to reduce the overclock on that particular device, while keeping it on the other two?
2. Do these devices report their temperature? If so, how can I see it?
But yea, the heatsink arrangement makes it difficult to place the miners so they do not blow hot air into one another or other miners...
Re: [ANN] Technobit HEX8A1 - 130/260 GHs Coincraft A1 board-499/999 EUR March
I thought we agreed, order: RTCNXJFCR had not yet arrived and the deal was the end of February. If did not come until now, I doubt that will ever come (maybe I'm wrong)!
"End of February delivery" means they send out the miner by the end of February, not that you will receive it then. Just like the pre-production batch was Feb 10 delivery so they shipped them Feb 10 - 13 (my unit was sent out on 12th) and then it took some time to arrive. I expect the end of February units to be sent out before March 3rd (I have two units ordered in that batch).
You cannot expect a definite delivery date because various shipping options take varying amount of time.
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Got my board delivered
Can someone tell me, which cgminer version i should use, or is it necessary to use the tplink router whith the hex8a1?
greetz
Can someone tell me, which cgminer version i should use, or is it necessary to use the tplink router whith the hex8a1?
greetz
Get cgminer 3.12.3, patch it with the patch from technobit.eu, compile with option --hexminer8 and run.
I have a bunch of old PCs, I saw no point in buying the router when a PC can do the job better (I can run bfgminer on it for my BFL device and do other stuff if I want to).
Take care to use the same PSU to power the board and the PC.
Not necessary. I am using three PSUs currently - one for the PC, one for the HEX8 and one for 3xHEXb + 1xBFL60
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Got my board delivered
Can someone tell me, which cgminer version i should use, or is it necessary to use the tplink router whith the hex8a1?
greetz
Can someone tell me, which cgminer version i should use, or is it necessary to use the tplink router whith the hex8a1?
greetz
Get cgminer 3.12.3, patch it with the patch from technobit.eu, compile with option --hexminer8 and run.
I have a bunch of old PCs, I saw no point in buying the router when a PC can do the job better (I can run bfgminer on it for my BFL device and do other stuff if I want to).
http://youtu.be/WsWdOMbQF94
Or if you're like me and you have a crap ton of 300-400 watt PSU's... put them to work.
Or if you're like me and you have a crap ton of 300-400 watt PSU's... put them to work.
It's nice that they are using a relay to control the slave PSUs. That is better than the usual "connect all green wires together" method.
However, while you can use it like this, you cannot plug one device (video card, big BTC miner) to two different PSUs without special load balancing circuit (like it is done for dual PSUs in servers etc). You can however use the slave PSUs for video cards (one PSU per card) or separate miners (one PSU per miner).
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
1. Chieftec 450W is two rails +12V1 (21 A), +12V2 (18 A), Max +12V 360W, 1x 8Pin PCI-E
http://www.idealo.co.uk/compare/2826454/chieftec-iarena-80plus-450w.html
You might struggle to run it on that. My miners were 368W and 408W each at Defaults! Get a larger single rails PSU or try underclocking it.
I forgot about the power, now that I acutally went and looked, it's a 600W model with 46A single rail. It has two PCI-e connectors, but they both share the same cable - the wires are warm, but not hot...http://www.idealo.co.uk/compare/2826454/chieftec-iarena-80plus-450w.html
You might struggle to run it on that. My miners were 368W and 408W each at Defaults! Get a larger single rails PSU or try underclocking it.
Quote
2-3. The options were blank I copied across the numbers from the (Default #) in the text to the left of the option. Also you need to change Handle USB detect errors as (Default: hexA) to Hex8 option.
I didn't change that, but for now it runs OK. Is this a compile option (I only compiled it with support for hexb and hex8) or a command line option?Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
What is the power to hex8?
From same psu like your hexb's?
Post clock and voltage pls
From same psu like your hexb's?
Post clock and voltage pls
1.A Chieftec 450W PSU
2.Different - though I had no problems running my BFL Single from the 450W PSU and the HEXBs from the another PSU.
3.And this was my mistake. The technobit site says that "HEX8A1 defaults: --hexminer8-set-diff-to-one 0 --hexminer8-chip-mask 255 --hexminer8-voltage 1000 --hexminer8-options 8:260", but it didn't say that I have to specify these options, that if I do not specify them the miner does not work (for example, I do not have to specify any command line options for the hex-b to work).
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
I received my HEX8, compiled cgminer with --enable-hexminerb and --enable-hexminer8. It detects my 3 HEX16B and the HEX8A1, but the hashrate of the HEX8A1 is displayed as zero (while the hexBs work OK). What could be the problem?
Also, the fan is quite loud
Also, the fan is quite loud
Please use high speed fans on these devices. I have put my miners in the basement so the noise does not bother me, but I will need them to run cool and fast in the summer (I do not know how hot the basement is going to get).
Also, I'd rather get my miner as soon as possible than wait for the fans or finger guards or whatever (I can buy those items in my local electronics store).
Also, I'd rather get my miner as soon as possible than wait for the fans or finger guards or whatever (I can buy those items in my local electronics store).
Bitmine says the chip can do up to 40GH/s in Turbo mode. 8*40=320. 260GH/s is all chips working on average at 32GH/s. Will it be possible to overclock this further or is it limited by power supply, cooling or something else?
From what I've read it's a buffer overflow problem? I'll be happy if they can reach 260Gh/260W. Just ship them soon as possible because HashFast is delivering 400GH+ and difficulty will likely sky rocket soon!
As long as it's not a big hardware problem (too weak power supply, not enough cooling etc), I agree. I can use the device now and update the firmware at a later date.
Which is why I ordered two devices, in addition to the pre-production one.
Bitmine says the chip can do up to 40GH/s in Turbo mode. 8*40=320. 260GH/s is all chips working on average at 32GH/s. Will it be possible to overclock this further or is it limited by power supply, cooling or something else?
Antminer does not use 1 kw. And its availiable now. It use araund 420w for 190 ghs.
There is no import tax, only vat on declared value.
However, since it is shipping from the US (or China) it will take longer to arrive and the customs can hold it up for a week. In addition to that, if it is send using regular mail (USPS etc), then the customs do not believe the declared value and ask me to send an invoice. I can do that preemptively if I have the tracking umber, but if I don't, I have to wait for their letter (takes a few days). Then I would have to tell them that I paid 1.9BTC for it and could have problems if they don't know what BTC is or if BTC has risen in value since then.There is no import tax, only vat on declared value.
And hopefully the HEX8A1 will get higher hashrate with newer FW (because chips can do up to 40GH/s or so Bitmine claims).
That being said, I am quite tempted to buy one Antminer...