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Showing 20 of 684 results by TheSeven
Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:18:00 UTC
My Kitchen Card Mod -

Er, don't these fans push the hot air back into the cards? Or do they have symmetrical coolers?
Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:18:00 UTC
Another piece of my mining rig is about to be mounted



5870 is for size reference here.


Now these are fans into which you really wouldn't want to get your fingers into!  Shocked
Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:17:00 UTC
How much did that cost you? Did you have to build it?

http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,400,795&Prod=XUPV5
Totally not worth it. $2000, or $750 for academic purposes (which these aren't). Only do this if you have such a board anyway for other things, to make some use of it in the time that it would otherwise be idle.

Great!!

What kind of FPGA is this? And, it seems to be a pci-e 1x board, while do you access it from a serial (?) cable?

Best regards.

spiccioli.

This is an XC5VLX110T-1FF1136 running at 120MHz. If you want to build a dedicated mining board, I'd suggest placing a shitload of XC6SLX150 chips on it, and much less unused peripheral stuff.

And yes, it has PCIe 1x, but I didn't bother with that (neither from the FPGA nor PC side), RS232 is just easier and simply fast enough (roughly 3% bandwith utilization at 115200 baud).
Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:17:00 UTC
There are readily made FPGA clusters of course, but they usually include a lot of features that you don't need (like high speed interconnects between the individual FPGAs), and you often won't even find prices for them, as this kind of stuff is usually in the >$100k range.

Building your own one (if your have the experience) might be as "cheap" as $10k per 6GH/s or something in a 3U case.
Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:17:00 UTC
My 120MH/s rig in action:

Post
Topic
(Unknown Title)
by
TheSeven
on 25/01/2020, 02:17:00 UTC
so, those chips are $152 each

Yeah, roughly, depending on the exact model and quantity. Don't forget the cost of the board though.

what is the board to put a shitload of them on?

You'll need to build one. Design and order a 4layer PCB containing the neccessary voltage regulators, clock generation and means of communication (JTAG, and maybe I²C, RS232 or USB?).

Has anyone tried this with more than one fpga chip? does it scale fully?

There are already some people running multi-FPGA mining setups. And yes, it does scale fully (~190MH/s per chip, can possibly be optimized even further), and if you also account for the PCB manufacturing and assembly costs, even more than that.
Post
Topic
Board Securities
Re: [LABCOIN] Questions deleted by Sam
by
TheSeven
on 17/10/2013, 17:25:10 UTC
Quote from: Bitcoin Forum
A reply of yours, quoted below, was deleted by the starter of a self-moderated topic. There are no rules of self-moderation, so this deletion cannot be appealed. Do not continue posting in this topic if the topic-starter has requested that you leave.

You can create a new topic if you are unsatisfied with this one. If the topic-starter is scamming, post about it in Scam Accusations.

Quote
Quote from: Bitcoin Forum
A reply of yours, quoted below, was deleted by the starter of a self-moderated topic. There are no rules of self-moderation, so this deletion cannot be appealed. Do not continue posting in this topic if the topic-starter has requested that you leave.

You can create a new topic if you are unsatisfied with this one. If the topic-starter is scamming, post about it in Scam Accusations.

Quote
Labcoin,

Is TheSwede75 still part of the team?

Would also be interesting to see if they still consider me part of their team...

They're still listing howard and me here: http://labcoin.com/presentation.html
Despite promising to remove that ASAP. Not a good sign at all.

Quote from: Bitcoin Forum
A reply of yours, quoted below, was deleted by the starter of a self-moderated topic. There are no rules of self-moderation, so this deletion cannot be appealed. Do not continue posting in this topic if the topic-starter has requested that you leave.

You can create a new topic if you are unsatisfied with this one. If the topic-starter is scamming, post about it in Scam Accusations.

Quote
So, looks like we've now reached the point where he needs to delete more than half of the posts of this thread to remove all traces of those questions and the following shitstorm? Roll Eyes
Post
Topic
Board Securities
Re: [LABCOIN] IPO [BTCT.CO] - Details/FAQ and Discussion (ASIC dev/sales/mining)
by
TheSeven
on 12/10/2013, 22:39:11 UTC
-H.Z. Wang has verified to us that Labcoin never took receipt of his finished chip design.  Who's gear are you hashing with?  

- Someone else completed his work. We are hashing with our own gear.

"Completed". Aha. That implies that you actually got any results of his work, which he says you didn't. If you did, please also pay him appropriately. 10btc is a joke.

-Why has 65nm development been suspended?

- Resources are used according to priorities. Development will restart next week.

So who's going to do this? Are you still counting on me to do any work for you?

-Why do you refuse to properly identify (video skype) yourself?  Video chat with TheSeven right now.  Prove you are who you say you are.

- My identity will be proven upon a meeting with someone nominated as a community representative when we open our mining facility.

Why do you refuse to even tell people who's actually involved with the project, and what your real identity is?
That is something that you should really publish here ASAP.
Your answer suggests that you're just trying to buy more time before people figure out who you really are. (Alberto?)

-What's the fund address?  Show us the money.

- I need to shuffle funds located in different wallets  for which i don't have control now.

Whatever that means...

-We're down to 10TH now?!  What happened to 50?

- We are not down to 10 TH, this is the first batch total hashing power.

You previously said that you're going to deploy 20 TH/s by the 15th. That's now down to 3 TH/s in your previous announcement.


Also, I hereby publicly request that you take down any web site or shareholder information that mentions my name. I already asked you to do that privately weeks ago, but you just ignored it. Please remember that you never had my consent to abuse my name and reputation in such a way.
Post
Topic
Board Announcements (Altcoins)
Re: [XPM] [ANN] Primecoin Release - First Scientific Computing Cryptocurrency
by
TheSeven
on 22/07/2013, 22:01:37 UTC
Looks like the transaction was finally mined by someone.
I'm not quite sure why, but things should be fine for now.
We just need to prevent this from happening again in the future.
Post
Topic
Board Announcements (Altcoins)
Re: [XPM] [ANN] Primecoin Release - First Scientific Computing Cryptocurrency
by
TheSeven
on 22/07/2013, 22:00:03 UTC
PRIMECOIN NETWORK GETTING DDOS ATTACK?

I dropped 90% in PPS. (PC, and all servers)

See a few posts above: We know what's happening, and a fix is being worked on. For now everyone is affected by it to the same degree, so it isn't really much to worry about.
Post
Topic
Board Announcements (Altcoins)
Re: [XPM] [ANN] Primecoin Release - First Scientific Computing Cryptocurrency
by
TheSeven
on 22/07/2013, 21:48:30 UTC
It is not an attack. It's an issue in the miner that doesn't handle large block efficiently. A fix is being tested. Both the stock miner and mikaelh's miner are impacted.

Looks like I "broke" Primecoin by accident. Oh crap.

Anything I can do to help fix this up? Might double spending the funds in smaller transactions help resolve this?
If so, what's the easiest way to do this, now that the offending TXNs are lingering around in my wallet?
Or can someone somehow just forcibly mine them to get rid of them?

Why aren't those TXNs being mined (but relayed) in the first place? I sent them with stock primecoind with stock fee settings. I feel like that really shouldn't happen...

How long are these going to float around in mempools if we don't do anything about it?

I assume things will temporarily fix themselves for now as soon as the last of these large transactions get encoded into the blockchain. And then soon there will probably be updated builds of primecoin that fix its handling of large transactions.

IIUC the problem is that these transactions aren't going to be mined into blocks if the miner runs an unmodified primecoind.
So these will be around for a while if we don't take care of them somehow :/
Post
Topic
Board Announcements (Altcoins)
Re: [XPM] [ANN] Primecoin Release - First Scientific Computing Cryptocurrency
by
TheSeven
on 22/07/2013, 21:41:26 UTC
It is not an attack. It's an issue in the miner that doesn't handle large block efficiently. A fix is being tested. Both the stock miner and mikaelh's miner are impacted.

Looks like I "broke" Primecoin by accident. Oh crap.

Anything I can do to help fix this up? Might double spending the funds in smaller transactions help resolve this?
If so, what's the easiest way to do this, now that the offending TXNs are lingering around in my wallet?
Or can someone somehow just forcibly mine them to get rid of them?

Why aren't those TXNs being mined (but relayed) in the first place? I sent them with stock primecoind with stock fee settings. I feel like that really shouldn't happen...

How long are these going to float around in mempools if we don't do anything about it?
Post
Topic
Board Announcements (Altcoins)
Re: [ANN] [PPC] PPCoin Released! - First Long-Term Energy-Efficient Crypto-Currency
by
TheSeven
on 13/07/2013, 15:16:42 UTC
Voting is over. #199 wins the contest. Say hello to ppc's new logo! Now on to rebuilding the website!



Is that available in a vector graphic format?
This particular image looks like it was scaled down by just removing lines, really crappy.
Can you make a PNG image with alpha channel and without the background available in the highest possible resolution?
Post
Topic
Board Altcoin Discussion
Re: [XPM] Primecoin Record Books
by
TheSeven
on 10/07/2013, 19:54:05 UTC
Hm, none of those are mine so far.
Post
Topic
Board Announcements (Altcoins)
Re: [ANN] [PPC] PPCoin Released! - First Long-Term Energy-Efficient Crypto-Currency
by
TheSeven
on 09/07/2013, 22:20:13 UTC
So I have about 35 coins which are now about 32 days old.  I have a few questions about coinstake minting.

Do my coins have 35*32 coin days or do 35*2 coin days?  In other words, does coin age only start building up after the 30 day waiting period?

My wallet is not encrypted, when I run the client, do I get any indication that the client is minting?  I would at least expect to see some CPU activity for the process, which I don't.

Once I do find a stake block, and after I wait the 520 block stake period, do I have to wait another 30 days before I can start trying for another block?

You have 35*2 coin days, and yes, you'll have to wait for another 30 days (at least) after mining a stake block. The probability to even find one within a year with such a small amount of funds is fairly small.

This seems odd as it would encourage people to wait the maximal amount before trying to mine a stake block, since every time you do, you lose 30 days of interest.  So under ideal conditions, the interest is not 1%, it is about 0.75% interest, and only if you can reliably mine your stake near the end of the 90 day cap period.

Any idea why my client does not appear to be stake mining? (CPU usage is zero)

Wait, there's a misconception here. It's 35*2 coin days for the purpose of difficulty, but 35*32 for the amount of interest calculation.

If you don't have many unspent txouts older than 30 days, the CPU usage will be fairly low. The whole point of proof of stake is that it reduces energy consumption by not being processing power bound, but rather time and money bound.
Post
Topic
Board Announcements (Altcoins)
Re: [ANN] [PPC] PPCoin Released! - First Long-Term Energy-Efficient Crypto-Currency
by
TheSeven
on 08/07/2013, 22:39:43 UTC
So I have about 35 coins which are now about 32 days old.  I have a few questions about coinstake minting.

Do my coins have 35*32 coin days or do 35*2 coin days?  In other words, does coin age only start building up after the 30 day waiting period?

My wallet is not encrypted, when I run the client, do I get any indication that the client is minting?  I would at least expect to see some CPU activity for the process, which I don't.

Once I do find a stake block, and after I wait the 520 block stake period, do I have to wait another 30 days before I can start trying for another block?

You have 35*2 coin days, and yes, you'll have to wait for another 30 days (at least) after mining a stake block. The probability to even find one within a year with such a small amount of funds is fairly small.
Post
Topic
Board Altcoin Discussion
Re: [XPM] [ANN] Primecoin Prerelease Announcement - Introducing Prime Proof-of-Work
by
TheSeven
on 07/07/2013, 18:39:07 UTC
Those trying to use the linux build, although the .tar.gz is truncated, the extracted primecoin-qt is ok and runs fine.

But I need to run it headless!

-gen

That doesn't help at all, you can't run the QT one without an X server being installed on the box...
Post
Topic
Board Altcoin Discussion
Re: [XPM] [ANN] Primecoin Prerelease Announcement - Introducing Prime Proof-of-Work
by
TheSeven
on 07/07/2013, 18:36:09 UTC
Those trying to use the linux build, although the .tar.gz is truncated, the extracted primecoin-qt is ok and runs fine.

But I need to run it headless!
Post
Topic
Board Altcoin Discussion
Re: [XPM] [ANN] Primecoin Prerelease Announcement - Introducing Prime Proof-of-Work
by
TheSeven
on 07/07/2013, 18:23:17 UTC
Sunny, can you please fix the linux file? Or upload the source so I can build it? The tar.gz seems to be truncated.
Post
Topic
Board Altcoin Discussion
Re: [XPM] [ANN] Primecoin Prerelease Announcement - Introducing Prime Proof-of-Work
by
TheSeven
on 07/07/2013, 18:18:03 UTC
linux file size changed, but STILL broken!