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Showing 17 of 17 results by jwalck
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Board Bitcoin Technical Support
Re: Radeon HD 5970 issues after Catalyst 11.1
by
jwalck
on 02/02/2011, 09:59:14 UTC
Finally got it working! After reinstalling drivers so many times more, 2.6.32 with 10.10 just started crunching hashes beautifully!

For later reference, --lscs returns crossfire enabled and --lsch says disabled. If I delete the chain both gets active so need to leave it at that.

Thanks for the tips everyone that has helped.:)
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Board Bitcoin Technical Support
Re: Radeon HD 5970 issues after Catalyst 11.1
by
jwalck
on 30/01/2011, 20:55:46 UTC
Last, I also tried poclbm and this can just use one core at a time, if I start one process on GPU2 and then the other one on GPU1 both get on GPU2, reverse the order and both get on GPU1. At one time I got it to run on both GPU cores, but 100% load on the first and low single digit % on the second.

Regarding this configuration, have you set the environment variable "DISPLAY=:0" ?  I'm running kernel 2.6.34, fglrx 8.762 (not sure which Catalyst version this corresponds to) and SDK 2.1. 

I can't help with 11.1 since I haven't tried it yet.
Yes, the DISPLAY environment variable was set. As I said the same configuration has run flawlessly before, and trying with two installations. What does --lscs and --lsch say for you when you have it working?
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Board Bitcoin Discussion
Re: Bitcoin in 15 Words for Laymen
by
jwalck
on 30/01/2011, 14:53:44 UTC
I still think the layperson is only interested in currency that is controlled by themselves.
I dont think any currency ever will be. Direct trade, two pigs for your cow is the only form of exchange controlled by one person. Just my thoughts.Smiley
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Board Bitcoin Discussion
Re: Bitcoin in 15 Words for Laymen
by
jwalck
on 30/01/2011, 14:46:40 UTC
Bitcoin is a crypto-currency, cash controlled by mathematics instead of greedy bankers.

I get what you're saying, but I don't think the layman wants their cash controlled by mathematicians either. Nor does the layman want the burden of learning what a crypto-currency might be. How about:

Bitcoin is a currency controlled by you instead of by a greedy wunch of bankers.

Not mathematicians! Mathematics. I would especially like to think most would want their currency controlled by mathematics. It's well proved and trustworthy when it comes to numbers. ;)

More and more people (even not computer savy) are learning about cipherspace. Why not crypto-currencies? Didn't say it would work this week, but people learn new terms all the time.:) For now it could be skipped though, for one tagline.

Bitcoin is a Internet-based currency, controlled by the rules of mathematics instead of greedy bankers.
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Board Bitcoin Technical Support
[Solved] Radeon HD 5970 issues after Catalyst 11.1
by
jwalck
on 30/01/2011, 14:03:15 UTC
I got some very nice help from Diablo-D3 among others over IRC yesterday, but so far this is unresolved. I recently got a 5970 in my workstation, earlier running Debian sid with 2.6.37. Since 10.12 (latest available catalyst) didn't support 2.6.37 I went back to the squeeze kernel (2.6.32) and started running the diablo miner. This worked just fine and got full load on both GPUs directly. So that was using Linux 2.6.32, Catalyst 10.12 and AMD APP SDK 2.1.

Crossfire was reported as on in aticonfig --lscs and off in aticonfig --lsch, but since it worked I payed it no mind.

Yesterday I thought I'd try 11.1, since it at last brought support for my normal kernel (2.6.37). So I installed it, and thought I'd continue business as usual. But alas! The CPU now had a 50% load (dual core, so 200% is full load) and the GPUs were only working in 60-70% load according to aticonfig --odgc, and the hashes/s dropped accordingly.

I tried reverting to 10.12 and 2.6.32, but the problem only got worse. CPUs in full load and even lower GPU load. After this I've tried basically all combinations of Catalyst 10.9 and up, supported kernels and SDK 2.1 and 2.3. What works best right now is 2.6.37, 11.1 and SDK 2.3, but its close to half the speed of what I had before the change.

I tried installing a fresh Debian squeeze on a extra disk, with SDK 2.1 catalyst 10.12 and 2.6.32. A bare X and Diablos miner. Same problem! So its not just a problem with my current install, but more with the behavior of my graphics card. Can 11.1 have effected some fuse causing all this?

And no matter what I do with aticonfig and crossfire the result is the same. But I can get either enabled/disabled or enabled/enabled on --lscs/--lsch

Last, I also tried poclbm and this can just use one core at a time, if I start one process on GPU2 and then the other one on GPU1 both get on GPU2, reverse the order and both get on GPU1. At one time I got it to run on both GPU cores, but 100% load on the first and low single digit % on the second.

Anyone else with experience with either 11.1 or HD 5970 that can be of assistance?
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Topic
Board Bitcoin Discussion
Re: Bitcoin in 15 Words for Laymen
by
jwalck
on 29/01/2011, 11:50:27 UTC
Bitcoin is a crypto-currency, cash controlled by mathematics instead of greedy bankers.
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Topic
Board Project Development
Re: printing bitcoins on Dollarnotes for offline using
by
jwalck
on 25/01/2011, 00:19:51 UTC
Most "normal" currencies try to go to less cash, more digital currency. This is problematic because it make all transactions trackable and possible to analyze. Bitcoin is very very good for not having this issue at all, and still being digital (doesn't require any physical note or coin to be used).

With the upcoming years, new systems for paying easily digitally where you earlier used coins and note will appear (see tests with NFC and similar technologies, in mobile phones and similar) for the traditional currencies. The same route could be used for bitcoin, printing bitcoins won't be necessary. I think Hand-to-hand / AFK transactions can be simplified better in other ways.

And if I understand you correctly tieing the value of a bitdollar to another currency? This is not wanted, especially not if it is the US lollar because that one is going down way too quickly.Smiley
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Board Bitcoin Discussion
Re: PS3 botnet mining
by
jwalck
on 24/01/2011, 19:11:04 UTC
Quick estimate for Cell:
7 SPE SIMDs + PPE AltiVec, each doing 4*32-bit ops/cycle.
PS3 cell is clocked @ 3.2GHz.
bitcoinhash is ~6350 cycles without native rotate.
8 * 4 * 3.2G / 6350 -> about 16M hash/s.
About on par with a hexcore K10.
I get slightly over 17Mhash/s per socket from AMD Opteron 6128s, 8x2GHz. So that sounds pretty fair. TDP? ~50W?
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Board Marketplace
Re: Selling fast miner: 569 Mhash/sec on Radeon HD 5970 (stock clocks)
by
jwalck
on 24/01/2011, 13:00:52 UTC
Would you open source it for a 400 BTC bounty ?

Well, out of respect for previous buyers who spent their hard-earned BTC on it, no, I should not...

I'd rather be inefficient than proprietary. The client looks nice though! Is it using OpenCL?

To be honest, I think if you get youtipit or a web page describing your effort with the repository and a donate address, you'd make plenty too. And + on happiness and goodness in the world.:)
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Board Bitcoin Discussion
Re: PS3 botnet mining
by
jwalck
on 24/01/2011, 12:55:15 UTC
I don't have access to a PS3 myself so can't tamper with it, but I'd also be way more interested in seeing what the Cell/BBE could do than a ancient nvidia card. Probably not enough to work as a miner, but I'd like to see how it compares to newer x86 cores. Might be fair hashes/watt ratio?
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Board Bitcoin Discussion
Re: Nenolod, the guy that wants to prove Bitcoin doesn't work.
by
jwalck
on 23/01/2011, 19:34:32 UTC
LOL! Why don't you let me list the pictures you have in your website? I am sure there are more awesome ones! :D
(:=~~~
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Board Bitcoin Discussion
Re: Nenolod, the guy that wants to prove Bitcoin doesn't work.
by
jwalck
on 23/01/2011, 19:05:01 UTC
http://xwalck.se/j/img/threadrevival.jpg
Holy thread revival, Batman!
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Topic
Board Bitcoin Technical Support
Re: HD 5970 and CrossFire
by
jwalck
on 23/01/2011, 07:58:38 UTC
Yes, this fixed. Thanks!

Unfortunately soon after does the PSU of my new dedicated Bitcoin mining system died :(
Ohh, now that's terrible timing! Best of luck with your new mining rig (once its back online:).
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Board Development & Technical Discussion
Re: tcatm's 4-way SSE2 for Linux 32/64-bit is in 0.3.10
by
jwalck
on 22/01/2011, 11:23:16 UTC
I made a couple of changes to the sse2 source that sped it up about 5 or 6%:

Nice find of data dependencies!

Get about the same increase here on my AMD Opteron 6128 server. From ~32.4M to ~34.2M with all 16 cores. Too bad it will have plenty of other things to do soon. ;)
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Board Trading Discussion
Re: Bitcoind Pooled Mining Investment Club
by
jwalck
on 22/01/2011, 02:02:42 UTC
To be honest, the miner rig will draw quite a bit of current. Did you consider that bitcoins get harder/less profitable to generate and electricity prices are going up? What's the current situation? And if it is profitable right now, for how long will it be before you'll save money by keeping those servers offline?

Electricity is a big cost for running servers, way above bandwidth in normal situations and not far from the cost for the hardware over its life-cycle.

If it lasts long enough to pay for the hardware, I guess go for it.Smiley


It has been modified so that the  miner will be a client and the pool server will be on a vps somewhere else. This makes it a lot easier to manage.

Yep, I know the arrangement. Bad wording from my part, my question was much simpler. The mining rigs draw electricity for a cost that now or at some later time could be equal to or more than the coins generated. What then?
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Topic
Board Trading Discussion
Re: Bitcoind Pooled Mining Investment Club
by
jwalck
on 22/01/2011, 01:20:49 UTC
To be honest, the miner rig will draw quite a bit of current. Did you consider that bitcoins get harder/less profitable to generate and electricity prices are going up? What's the current situation? And if it is profitable right now, for how long will it be before you'll save money by keeping those servers offline?

Electricity is a big cost for running servers, way above bandwidth in normal situations and not far from the cost for the hardware over its life-cycle.

If it lasts long enough to pay for the hardware, I guess go for it.Smiley
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Topic
Board Marketplace
Re: We accept Bitcoins
by
jwalck
on 21/01/2011, 21:24:31 UTC
Telecomix News Agency / WeRebuid is a internet cluster. It's fairly hard to describe but there is some text on http://telecomix.org/ that might help for those that doesn't already know it! The easiest way to be a part of it is over IRC. #telekompaketet@irc.telecomix.org (port 6667, 6697/9999 for ssl), irc.telecomix.i2p over I2P, or http://chat.telecomix.org/.

Telecomix has been accepting bitcoins for donations (mostly for server hosting) since July 2010. http://werebuild.eu/wiki/Donations. Might be something to add to http://www.bitcoin.org/trade? :)