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761  Alternate cryptocurrencies / Altcoin Discussion / Thread about GPU-mining and Litecoin on: February 17, 2012, 01:34:42 AM
The original purpose of Litecoin is to be a CPU coin where anybody with their computer can mine litecoins. What has happened with Bitcoin is that GPU mining on bitcoin was a lot more efficient, so a lot of people starting mining bitcoins with GPUs. This pumped up the difficulty and made CPU mining unprofitable and therefore pointless. I don't want this to happen to Litecoin and I think most people agree with me on this.

Recently, there has been some rumors that mtrlt has modified his GPU miner to work with Litecoin. And he claims to have been able to create a GPU miner that outperforms CPU miner by a lot. Of course, all this could be FUD thrown at Litecoin by Solidcoin supporters. But I have talked to mtrlt about this and he seems genuine. So I'd like to get to the bottom of this.

Here's what I'd like to accomplish:
1) Figure out if GPU mining litecoins is indeed more efficient. And if so how much better is it.
2) Do we want to switch to a new hashing algorithm that is more GPU-hostile.
3) If we do want to switch, there are a ton of other questions. Can we modify scrypt params or do we need something totally different. How far away do we do the algorithm switch? How do we get miners/pools/clients ready for the switch so that there's no downtime?

Everyone, please refrain from SolidCoin bashing in this thread. And SolidCoin supporters, please refrain from posting unless you have something constructive to say. Thanks.
762  Alternate cryptocurrencies / Altcoin Discussion / Re: Physical Litecoins on: February 16, 2012, 08:59:07 AM
I'd be interested in getting one. Are you able to ship to Australia? Smiley

Sorry, I don't plan to ship any more of these. If you want them, contact casascius. I think he can make some for you.
763  Alternate cryptocurrencies / Altcoin Discussion / Re: Physical Litecoins on: February 16, 2012, 12:31:56 AM
It was sent out on Monday. Sorry for the delay. I gave each one of you an extra physical litecoin due to the extra wait. Let me know if you don't get it by next week.
764  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 15, 2012, 09:26:58 PM
I have 2 Icarus boards and after mining for a while, the stats start to look weird:

Code:
              Worker               │Accepted│Accepted│Stale shares│Invalid shares│Current│ Average │Temperature│Effi- │   Current                                            
                name                │  jobs  │ shares │ (rejected) │ (K not zero) │MHash/s│ MHash/s │(degrees C)│ciency│     pool  
Icarus board on /dev/tty.usbserial  │    4389│    2195│   23 (1.0%)│      2 (0.1%)│ 379.70│   373.31│  Unknown  │ 94.7%│   Eclipse                                            
Icarus board on /dev/tty.usbserial20│    4459│    2272│   23 (1.0%)│      7 (0.3%)│ 379.36│129609.80│  Unknown  │  0.3%│   Eclipse                                            

The accepted shares are about the same, but the 2nd board is shwoing a wrong average mhash/s and efficiency. In the logs I do notice a that the 2nd board had timed out a few times. TheSeven, any ideas?
Looks like something goes wrong with the total MHash counter for that worker. No idea what though, I've had a quick look at that code and can't spot any obvious reason for this. I also can't reproduce it by deliberately causing communication problems with the board.

This keeps happening to me. Let me know how I can help you fix this. I am running the latest code.
765  Alternate cryptocurrencies / Altcoin Discussion / Re: Does RealSolid manipulate the vote that could make him step down? on: February 15, 2012, 07:07:11 PM
I totally have no proof except that he should be able to do this.. but the numbers look obvious: 52 aprove of him, 7 are against him (as of 2/15/2012 19:16CET). If this was a real Vote over there (http://solidcointalk.org/topic/186-do-you-want-realsolid-to-be-lead-developer/) we would see reversed figures.
It's selection bias, look it up. Those who don't approve of the current leaders, have never registered on the forum or left to do something more useful with their life.

Or were banned before the vote took place and never bothered to register another account.
766  Alternate cryptocurrencies / Altcoin Discussion / Re: The Litecoin Development Club on: February 15, 2012, 07:05:57 PM
Thanks everyone for helping to make Litecoin succeed.

Since I love poker and know python, let me know how I can help with the LTC poker site.
767  Alternate cryptocurrencies / Altcoin Discussion / Re: artforz and coblee gpu mining litecoin since the start? on: February 15, 2012, 10:20:37 AM
As far as I'm aware in my last talks with mtrlt the litecoin GPU miner is only 10-20x faster than CPUs. Which is less compared to a GPU mining bitcoin 100x faster than a CPU.

From what I gather (assuming the GPU miner is legit), it performs better than CPU per watt by a small amount. In other words, it's 10-20x faster than CPUs but also uses almost 10-20x more electricity. So even if the miner is released, it won't kill CPU mining like what happened with bitcoins. And currently, it's much more profitable to use your GPUs to mine bitcoins instead of litecoins with the current prices.

It's quite likely the "dark pool" everyone was talking about isn't actually a botnet, just 10-20 highend GPUs mining it hard. No proof on that claim, just my opinion.

So why would you assume that the unknown miners are GPU miners instead of a botnet? Wouldn't they be more profitable mining bitcoins instead?
768  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 12, 2012, 11:26:40 AM
I have 2 Icarus boards and after mining for a while, the stats start to look weird:

Code:
               Worker               │Accepted│Accepted│Stale shares│Invalid shares│Current│ Average │Temperature│Effi- │   Current                                             
                name                │  jobs  │ shares │ (rejected) │ (K not zero) │MHash/s│ MHash/s │(degrees C)│ciency│     pool   
Icarus board on /dev/tty.usbserial  │    4389│    2195│   23 (1.0%)│      2 (0.1%)│ 379.70│   373.31│  Unknown  │ 94.7%│   Eclipse                                             
Icarus board on /dev/tty.usbserial20│    4459│    2272│   23 (1.0%)│      7 (0.3%)│ 379.36│129609.80│  Unknown  │  0.3%│   Eclipse                                             

The accepted shares are about the same, but the 2nd board is shwoing a wrong average mhash/s and efficiency. In the logs I do notice a that the 2nd board had timed out a few times. TheSeven, any ideas?
769  Alternate cryptocurrencies / Altcoin Discussion / Re: artforz and coblee gpu mining litecoin since the start? on: February 10, 2012, 06:43:46 PM
I also don't really care about the price because I'm not in this for the money, but on last check the price of each SC is nearly 4x that of LiteCoin.

Seriously CoinHunter. If you didn't care about price, then why do you keep manipulating block rewards to try to reach dollar parity? SC block rewards is now only ~0.05 (1/1000 of Litecoin). And SC price is only about 3x that of LTC. That's rather weak in my opinion. Maybe that's why you come here to spread your FUD?
770  Alternate cryptocurrencies / Altcoin Discussion / Re: artforz and coblee gpu mining litecoin since the start? on: February 10, 2012, 05:11:43 PM
CoinHunter, if you were just doing a public service to announce this, shouldn't the title for this post be "GPU mining on litecoin possible!" instead of accusing me of something that you have absolutely no proof of because I'm not doing it. If an efficient GPU miner for scrypt is possible, this is the first time I'm hearing it. I'm no expert in scrypt, but a few knowledgeable people I know have looked at it and determined that it is designed to not work well on GPUs. Is it possibl that they are wrong? sure, but until I see solid proof, this is just another FUD post from CoinHunter.
771  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 09, 2012, 11:33:14 PM
When using the icarus worker, if I stop the miner and restart it, the icarus worker will fail to start with this message:

Code:
Icarus board on /dev/tty.usbserial: Timeout waiting for validation job to finish

It seems like I have to disconnect and reconnect them in order for it to work again. Any ideas?
772  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 09, 2012, 11:31:20 PM
Here's the relevant part:

Code:
  # Single X6500 worker
  { \
    "type": worker.fpgamining.x6500.X6500Worker, \
    "deviceid": "AH00WOWD", \
    "firmware": "worker/fpgamining/firmware/ztexmerge_200mhz.bit", \
    "takeover": True, \
#    "uploadfirmware": True, \
  }, \

  # Single X6500 worker
  { \
    "type": worker.fpgamining.x6500.X6500Worker, \
    "deviceid": "AH00WI18", \
    "firmware": "worker/fpgamining/firmware/ztexmerge_200mhz.bit", \
    "takeover": True, \
#    "uploadfirmware": True, \
  }, \
773  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 09, 2012, 08:17:59 PM
Very sure. I programmed them using the x6500 software. I have all 5 up and running using 5 instances of your software with single x6500....but the hotplug won't work for whatever reason. Any suggestions?
No idea how hotplug cannot work if single workers do, that's really weird. They both enumerate all devices on the bus, just that the single worker skips everything where the serial doesn't match, and that hotplug spawns a single worker for every serial that it finds on the bus.
But you should be able to just copy the worker definition in the config file for all 5 boards instead of running 5 MPBM instances. That's basically what hotplug would do anyway.

I have 2 x6500 workers in a single instance of MPBM on my Mac.
774  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 09, 2012, 07:01:18 PM
Very sure. I programmed them using the x6500 software. I have all 5 up and running using 5 instances of your software with single x6500....but the hotplug won't work for whatever reason. Any suggestions?

I never got the hotplug working on my Mac either. I got the same error message. So I gave up and just specified the serial and that's been working fine.
775  Bitcoin / Hardware / Re: FPGA development board "Icarus" - 3rd batch information. on: February 09, 2012, 05:58:07 PM
i suggest every one switch to Modular Python Bitcoin Miner
https://bitcointalk.org/index.php?topic=62823.0

Yes, it's really good.
776  Bitcoin / Hardware / Re: X6500 Custom FPGA Miner on: February 09, 2012, 03:11:24 AM
@Coblee:
What kind of cooling setup do you have and what getwork interval did you have with the old miner? I epoxied my heatsinks, have an active 120mm fan over my X6500 and ran it with a getwork (-i) of 14 getting. I'm finding I get a steady 390-410mh/s (but usually 400). I 'm going to try out MPBM on the weekend when I get a chance.

Good decision. With the normal x6500 miner, I was only able to do 355 mhash/s with the 200mhz bitstream. With MPBM, it's showing me 393 mhash/s for the past day. This is running on a Mac and measured using Eclipse's share count. I'm not sure why it's so much better, but I'm not complaining!

I have epoxied my heatsinks also and have an active 120mm fan over 2 stacked x6500. I have getwork of 15. At first I thought the epoxy wasn't put on correctly so heat wasn't dissipating properly. But seeing that I'm getting much better results with MPBM makes me think the default x6500 miner wasn't efficient. It might also just be not efficient on a Mac.
777  Bitcoin / Hardware / Re: X6500 Custom FPGA Miner on: February 09, 2012, 01:47:09 AM
I think we can all agree that MPBM is awesome! I think MPBM will become our recommended miner, and we will support and develop it into the future. We'll most likely be phasing out development on x6500-miner over time.

Good decision. With the normal x6500 miner, I was only able to do 355 mhash/s with the 200mhz bitstream. With MPBM, it's showing me 393 mhash/s for the past day. This is running on a Mac and measured using Eclipse's share count. I'm not sure why it's so much better, but I'm not complaining!
778  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANN] RealCoin [A new e-commerce business platform][Release Date: Feb 10] on: February 08, 2012, 09:54:06 PM
What are you going to do with the up to 1 trillion $ that you get from selling your RLCs? Will you always keep all that money in reserves or are you going to do fractional banking just like traditional banks? If you will keep that money in reserves, you risk having it stolen, embezzled, or just having need to use it because your company is running out of money. If you don't plan to keep all of it in reserves, then you are no better than the current banking system + paypal.

In a sense, you are just printing your own currency backed by USD. Just like the US printed dollar backed by gold. And maybe one day, you will remove that backing. I hope you are prepared for the legal mess you are getting into.
779  Alternate cryptocurrencies / Altcoin Discussion / Re: The Litecoin Development Club on: February 08, 2012, 09:33:57 PM
mine LTC on web pages (javascript miner), games, etc where CPU coin is stronger. Then the website/game developer can pay rewards in terms of LTC. Bitcoin wont be able to compete here. Other alt-coins (including custom altcoins by game owners) may indeed enter here, but its unlikely if they can use our LTC miners/ libraries for free.

Vanderbleek (https://bitcointalk.org/index.php?action=profile;u=44378) was working on a game that uses litecoin as a currency and generates litecoin in the background. I don't know the current status of it. You may want to contact him.

If we could have an online wallet for LTC just like blockchain's wallet, people wouldnt even need to download anything. They could just play games, spend their LTC on merchandise (or whatever).

There's already a litecoin instawallet created by g2x3k: http://wallet.it.cx/
780  Bitcoin / Mining software (miners) / Re: Modular Python Bitcoin Miner - Official Thread on: February 08, 2012, 06:59:04 PM
Anyone working on an Icarus worker?

I might do that if someone can offer me access to a board for testing.

I might be able to do that. What kind of access do you need?
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