Bitcoin Forum
March 19, 2024, 06:13:14 AM *
News: Latest Bitcoin Core release: 26.0 [Torrent]
 
  Home Help Search Login Register More  
  Show Posts
Pages: « 1 ... 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 [256] 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 ... 800 »
5101  Bitcoin / Hardware / Re: KNC just posted pics of their case, PCB samples coming next week \o/ on: August 14, 2013, 04:51:12 PM
Why 5V external power?  Most ATX PSU are designed to deliver most of their power on the 12V rail(s).
That was the first thing that I thought when I saw those pictures. Sure 5V to ~1V will be a little more efficient, but that's just unloading the problem onto the end user who as to come up with a source of 30A of 5V.
It must be a mistake.

Yeah ultimately it is 120VAC/240VAC in and ~1VDC out. The individual steps (or number of steps) doesn't really matter.  What matters is the overall efficiency from the wall to the chip.  ATX PSU are very efficient at what they do.  It is unlikely any design (from wall to chip) will be more efficient than using a 12V rail on ATX PSU.  I had even looked into dedicated 12V PSU (i.e ones used for industrial equipment not PCs) and while they are sometimes cheaper they aren't as efficient (efficiency tends to be high 80%).

Making the user try to find a PSU capable of up to 200 amps on 5V (Jupiter pulls 1000W) is going to immediately kill of the most accessible, best priced, and high efficiency options ... ATX (computer) PSU.

Like you said, lets hope it is a typo (it really uses 12V not 5V at board level) and not a horribly stupid design choice.
5102  Bitcoin / Hardware / Re: KNC just posted pics of their case, PCB samples coming next week \o/ on: August 14, 2013, 04:34:08 PM
Why 5V external power?  Most ATX PSU are designed to deliver most of their power on the 12V rail(s).
5103  Economy / Securities / Re: SEC Charges Bitcoin Savings and Trust (BTCST) as Ponzi Scheme on: August 14, 2013, 07:33:16 AM
The whole "Bitcoin is money" ruling was likely a Texas court being glib to the feds.

It isn't a "texas court" in any meaningful sense of the word.  It is a federal judge in a federal court ruling on the applicability of federal law in a federal lawsuit brought forward by federal agents (SEC) which just so happens to be physically located in Texas.  There are over 800 judges in the federal court system with courthouses in more than a dozen states if for no other reason than practicality.

The ruling sided with the arguments of the federal agents.  The SEC claimed Mr. Shaver's operated a ponzi scheme and issued unlicensed securities in violation of federal law. It was the defense claim that Bitcoin is not money and thus Bitcoin contracts can't be securities and the SEC had no basis for the lawsuit.  


5104  Alternate cryptocurrencies / Altcoin Discussion / Re: Miner's Official Coin LAUNCH - NUGGETS (NUGs) on: August 14, 2013, 01:15:41 AM
Wait....how about I pay someone that same .52 BTC just to do a hard fork to delete all the premined coins?

Hahahahahaaaa.  Now that's money well spent and I won't have to ever have to worry about your lying blabbering mouth.

I will delete all the premined coins which will include all the coins your sock puppet just stole from me.....again.

I can probably pay even less than .52 BTC for a hard fork.  Lol, what a steal.

You never thought of plan B, did ya, assclown?  I always have a back-up plan for thieving, lying scammers such as yourself. Ha!

Oh boy.

Yeah he is ignorant.  Still doesn't understand how crypto-currency works.



Seriously, how much do you wanna bet I can pay a programmer to do a code fix on my coin and include a deletion of all the premined coins followed by a hard fork?

Put up a bet!

Then we'll see who's ignorant.

Sure you can do that and miners can keep using the existing fork.  So go ahead.  You could pay a developer to hard fork Bitcoin so that you get 1% of all coins mined it doesn't mean anyone will use it.
5105  Alternate cryptocurrencies / Altcoin Discussion / Re: Miner's Official Coin LAUNCH - NUGGETS (NUGs) on: August 13, 2013, 11:45:34 PM
Wait....how about I pay someone that same .52 BTC just to do a hard fork to delete all the premined coins?

Hahahahahaaaa.  Now that's money well spent and I won't have to ever have to worry about your lying blabbering mouth.

I will delete all the premined coins which will include all the coins your sock puppet just stole from me.....again.

I can probably pay even less than .52 BTC for a hard fork.  Lol, what a steal.

You never thought of plan B, did ya, assclown?  I always have a back-up plan for thieving, lying scammers such as yourself. Ha!

Oh boy.

Yeah he is ignorant.  Still doesn't understand how crypto-currency works.
5106  Bitcoin / Bitcoin Discussion / Re: NY regulator memo: Notice of Inquiry on Virtual Currencies on: August 13, 2013, 11:37:33 PM
I dont get this, how exactly will they ACTUALLY stop Bitcoin? There is talk, more talk and even more talk. All the rules and regulations in the world, wont do shit to Bitcoin. The reality is that thousands of users ARE using it, regardless of what someone is saying, simply because they know they cannot be touched. So what is this all for? One last hurrah by regulators?

They can't stop Bitcoin "core" but they can make it prohibitively expensive/difficult to operate as an entity on the line between virtual and fiat.  They can either those malice or ignorance drive out most of the competitors in the US, leaving only a few massively capitalized entities (next gen banks) to remain.  Granted Bitcoin itself will "go on", and no the US isn't the whole world, but it doesn't make it good news.
5107  Other / Beginners & Help / Re: Has anyone actually got an ASIC based miner? on: August 13, 2013, 11:35:24 PM
Block Eruptor blades (USB Block Eruptor's big brother) are also available. 
5108  Bitcoin / Bitcoin Discussion / Re: did ASIC ruin bitcoin ? on: August 13, 2013, 11:31:37 PM
why the fuck would anybody spend money on equipment pay electric and commit time if you cant make money?

if its not profitable to mine people wont mine and bitcoin will fail.

Difficulty adjusts.  If SOME people stop mining then difficulty will fall and those remaining will see their revenue rise and become profitable.  If difficulty falls too much then some people will turn rigs back on or buy new rigs and difficulty will rise again.  The network will adjust either way.

Also once hardware is purchased it is a sunk cost.  So long AFTER it becomes unprofitable to buy MORE NEW hardware, miners will continue to still operate their miners.  The only time it makes sense to a rig to be idle is when value of BTC < electricity used and that is at a difficulty much much higher (closer to 1 billion difficulty).  Even there it won't affect all miners equally.  The least efficient miners (lowerst MH/W and highest electrical cost) will idle first and help to lower difficulty.

So yes some miners may quit (and sell their rigs to other miners will cheaper power) and NEW hardware sales may flatline but miners will still keep mining as there is no economical reason not to.

5109  Bitcoin / Bitcoin Discussion / Re: did ASIC ruin bitcoin ? on: August 13, 2013, 11:20:50 PM
Then don't mine. 

this leads to FAIL    Roll Eyes

No it doesn't.  I didn't say nobody mine.  Someone will always be mining. It might not be you, and Bitcoin won't fail just because YOU are no longer mining. 
5110  Bitcoin / Bitcoin Discussion / Re: did ASIC ruin bitcoin ? on: August 13, 2013, 11:20:07 PM
One thing I do think about is if ASICS will lead to the slow erosion of the decentralized nature of bitcoin. As rewards half, solo miners might step out. Leaving pools, which then could consolidate (or go bankrupt)

The reward halving has nothing to do with ASICs.  Prior to ASICs the overwhelming majority of GPU miners operated in a pool.  I don't see anything that makes ASIC miners more likely to use pools.  Most will but most always have.
5111  Bitcoin / Bitcoin Discussion / Re: did ASIC ruin bitcoin ? on: August 13, 2013, 11:14:23 PM
when you spend up the ass for the equipment it takes months to deliver and when you have the equipment in hand the difficulty is so high you risk losing money cause you cant make ROI i think that makes bitcoin look like a joke and a huge gamble thus making bitcoin less attractive and could lead to panic selling and collapse.

Then don't mine.  Seems a pretty simple solution.  If you believe the risk of ordering, combined with potential delays, limited upside, and rising difficulty make it unattractive to invest in new mining hardware .... THEN DON'T.

"Bitcoin" (the network) needs someone to provide computing power.  It doesn't need everyone to do so, it doesn't need any particular individual to do so.  Eventually the mania will die down and Bitcoin mining will return to a high capital, low return operation just like ANY OTHER commodity production.
5112  Bitcoin / Hardware / Re: HashFast announces specs for new ASIC: 400GH/s on: August 13, 2013, 10:55:03 PM
A lot of US circuits are 15A @ 120V. Continuous load should stay under 80%. So 15 * 120 * .8  = 1440 watts max.

This is the number ~1400W.  It doesn't really matter that some people in some countries have higher capacity.  An ASIC unit which uses >1400W PSU makes global sales "difficult".  It is possible to install 240V circuit in US residences and many US businesses are wired with a lot of 240V drops but it doesn't really matter.  An ASIC provider using more than 1400W per unit would need to segregate their product offering.  Also while it isn't exactly a requirement all ASICs to date have used either low output PSU or standard ATX PSU.  Those PSU tend to max out at <1400W for the same exact reason.  Making them run at 110V to 240V and keeping output below 1400W allows a single PSU to be used almost anywhere in the world by simply changing the cord.

Lastly 1400W is a lot of heat to remove and given how parallel mining is it simply is easier, cheaper, and simpler to make 2x <1400W units then trying to make one "monster hasher" which uses say 2500W and then needs a lot of creative engineering to figure out hot to get power in, and heat out safely.

5113  Other / Beginners & Help / Re: scrypt question, would faster and bigger ram improve hash rate? on: August 13, 2013, 04:24:46 AM
So the RAM in the GPU is what matters?

Well RAM is still incorrect.  It is the cache inside the GPU itself.  RAM generally refers to the graphics card main memory (i.e. 1GB, 2GB, etc).  The memory usage for Scrypt is in KB.  Don't feel bad most people assume "memory hard" actually means "memory hard" but the memory hardness of the Scrypt used in LTC (and clones) is 1% of the default Scrypt requirements and those are considered for use in low security (real time) applications.  It is about 1/6,000th of the memory requirements recommended for high security applications.

Interesting, I get the bits about scrypt 1% lite
So why does various monitoring software report GPU memory usage of between 1-1.5GB per card and CG miner using 80+ MB per instance?

It has to do with the way cache works in GPUs.  Developers don't have access to the cache directly.  Scrypt kernel gets around this by loading the data into main memory to ensure it will be loaded into cache. The copies in main memory are not necessary.

As for cgminer uses system RAM. Well that is no different than any other program including your webrowser. 
5114  Other / Beginners & Help / Re: scrypt question, would faster and bigger ram improve hash rate? on: August 12, 2013, 09:04:33 PM
So the RAM in the GPU is what matters?

Well RAM is still incorrect.  It is the cache inside the GPU itself.  RAM generally refers to the graphics card main memory (i.e. 1GB, 2GB, etc).  The memory usage for Scrypt is in KB.  Don't feel bad most people assume "memory hard" actually means "memory hard" but the memory hardness of the Scrypt used in LTC (and clones) is 1% of the default Scrypt requirements and those are considered for use in low security (real time) applications.  It is about 1/6,000th of the memory requirements recommended for high security applications.
5115  Bitcoin / Hardware / Re: HashFast launches sales of the Baby Jet on: August 12, 2013, 08:25:45 PM
Come on people, either these guys have a very bad PR or this is a scam. If you think anyone not IBM, Intel or another big player can deliver one chip that can use up to 300W in power, you're delusional. And even them would never do such thing if not for experimental purposes (if even viable for that).

TDP of a 7970 is 250W+  ...  Just sayin'.


http://en.wikipedia.org/wiki/Radeon_HD_7000_Series#Radeon_HD_7900

And that is a lot more than just a chip. The RAM and VRMs on these things take a good amount with it. You also should know there is a huge difference in both yields and cooling something that is <200W and one that pushes through 300W or more. Same reason why you see Intel having high-end chips at 130W+ but not much more than that.

You do know a Bitcoin ASIC (any ASIC) is going to have heat load off the chip too right? No ASIC runs as 12V so you are talking about so pretty "beefy" DC to DC converters.  Not sure why people assume xW at the wall would mean xW at the chip.
5116  Other / Beginners & Help / Re: scrypt question, would faster and bigger ram improve hash rate? on: August 12, 2013, 08:20:28 PM
if I bought 768 gigabytes of ram at 1600 mhz, would that improve hashing power?

No Scrypt parameters used by alt-coins use a negligible amount of RAM, about 128KB.  There is more than that in cache on the GPU (not main memory on graphics card, the registers and cache inside GPU itself).
5117  Other / Politics & Society / Re: government opening my packages? on: August 12, 2013, 08:12:28 PM
If Amagi Metals isn't going to prepare their packages properly, hopefully they are at least competent and responsible enough to insure their packages.

Generally insurance doesn't cover "missing" goods if the recipient takes delivery.  If it did, fraud would be pretty trivial.  Insure an empty box for $10,000, deliver empty box.  Claim box was empty but should have $10,000 in gold in it.  Collect $10,000 paycheck.
5118  Other / CPU/GPU Bitcoin mining hardware / Re: Wall socket question on: August 12, 2013, 07:57:13 PM
Nobody makes a NEMA 5 to NEMA 6 adapter because one is designed for 115V and the other for 230V.  Good way to blow things up.
5119  Bitcoin / Development & Technical Discussion / Re: dust removal idea on: August 12, 2013, 06:58:39 AM
Wait I should be force to send my bitcoins even if it is dust, to an organization I disagree with, without my approval. I think you should goto paypal they would love this idea.

Did you jump right to CHOICE #2 and miss CHOICE #1?
5120  Other / CPU/GPU Bitcoin mining hardware / Re: Wall socket question on: August 12, 2013, 06:57:44 AM
I'm not sure I follow exactly on the setup you are running but it sounds awesome and similar to what I had plans to try next if the amp draw lived up to my expectations shown on paper. Any pics of your power setup? Would love to take a look if you get a chance Smiley

I had a thread a while back with some photos not sure if I can still find a link.

Essentially NEMA 6-30 is just a 30A version of the plug you have. They make a locking connector version (L6-30A) which you insert and turn to lock.  Nice so a cable pulling 30 amps doesn't get knocked loose.

If you ever need a lot of power the cheapest (and safest) setup is
1) put in a new 30A breaker in breaker panel
2) run a line to a new L6-30A outlet  http://imageserver.grainger.com/is/image/Grainger/1PKK1_AS01?$productdetail$
3) Grab an AP9571 made by APC.  It is a PDU (power distribution unit) which is a fancy name for rack mounted expensive power strip.

Any PDU will work but the nice thing is APC made like a quadrillion of these in the last 20 years so used ones are always available on ebay for like $30 to $50. 
http://www.ebay.com/itm/APC-AP9571-Rackmount-PDU-12-port-Power-Strip-208V-24A-/231025800012?pt=US_Power_Distribution_Units&hash=item35ca35f34c

You will notice the plug on the end is NEMA L6-30P.  The cable is like a firehouse.  Never cut one open but it has been to 8 gauge are larger cable and surrounded by good 1/4" of insulation.  230V * 30A * 80% = 5.5 KW and it comes with 12 C13 outlets.  You can run a whole ASIC farm off one or two of these, although it wouldn't work with that 1600W PSU.






Pages: « 1 ... 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 [256] 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 ... 800 »
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!