Interestingly it is really considerable to buy some GH on cex.io, because if the prices keep on not going down you can sell them after a period and had the mining for free.
lol. Anyway, it is always fun to see guys spamming their cex.io referral links, and then lure newbies to the site. You can find lots of them here.  https://bitcointalk.org/index.php?topic=387280.0 +1 Yeah, I noticed that too. I didn't want to get started on cex.io, which in my opinion is the single largest treat to bitcoin that exist, Santoshi warned about companies like them. |
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What is your opinion about:
Will the DOGE follow the bitcoin crash that is about to happen or will it go up? /There are theories that support both stances.
Any wise predictions from the gury's?
Well, The operators of two exchanges for the virtual currency Bitcoin have been arrested in the US in connection with the black market website Silk Road. yes, I know and the whole china and EU ban, we all know the marked are going to drop... but I was asking you about your opinion about the DOGE / BTC exhange? |
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So sad that it will be looted way before the planned opening date. jk  Yeah that CD with "Big Fun Party Mix" sure is tempting... |
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What is your opinion about:
Will the DOGE follow the bitcoin crash that is about to happen or will it go up? /There are theories that support both stances.
Any wise predictions from the gury's?
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What about cloud mining?Is it possible to mine all curencies?Sorry a little off topic but it would be nice to hear actual opinion.
No I don't think that is profitable. You will only get ROI if the bitcoin rate increase a lot, but in that case you might as well have bougth bitcoins and hold' em, then would profit have been larger. |
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I would recommend to invest in a small setup to get some experience before blowing your hard earned fiat.
If you have an old desktop computer then you can slowly start building a small mining rig.
To get started you only need a powerful graphic card and a good power supply:
Here is an example:
MSI R9 280X (~$360)
Corsair HX750 (~$140]
The power supply will support two graphics card, so later you can upgrade your rig with one more card.
You don't need to build a fancy rig to start with, just open the desktop chassis and leave the side open.
This setup will only cost you ~$500, and give you 720 kH/s
Right now you can mine altcoin worth ~$10 / day
So in approximate 50 days, you will have ROI.
You can use the income to upgrade your rig, or build a new one.
Don't have to much focus on investing on the newest gear, keep your focus on reaching ROI for all your investments.
Slowly build up experience, when you have about 1/2 experience in mining then are you ready to pull the trigger for bigger investments.
That is my advice.
Cheers!
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 12" riser extensions worked out perfectly That is really shows the essences of scrypt mining; keep the cost down. Good job! |
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Liquid cooling is worth it for GPU longevity. Heat is a killer and my liquid cooling setup runs 15-20*C cooler than air fans. I have 2x 7950's that use non-standard PCB's that are air cooled. They run in my open rig at 64-70*C The 2x 7950's that are using EK waterblocks with a 4x120mm radiator and 4x fans runs at 48*c all day in my house that swings from 71-80*F. It's expensive though. My watercooling setup alone is at least $500-600. (radiator, Resevoir+pump, flow meter, tubing, fittings, GPU waterblocks)  Love it! <3 Im sure your wife approves  |
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As you properly have realized you have a serious temperature problem.
I would recommend that you keep your average temperature under 80C (My target temp is 75-78C, and my cut-off temp is 85C).
You can properly get away with running the rig at 85C, but that will significantly reduce the lifetime of you graphics cards.
It is NOT recommended.
1-2 extra fans can normal do the job to bring down the temp.
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Alright, well my pool hash rate got better now, close to about 60% of actual hash rate.
I have further problem which is my actual hash rate, i am can run 600khahs and max intensity 15. If i get intensity 20 on both GPUs computer freezes.
Also very wierd it is if i use settings that are suppose to be best for r9 290x (--thread-concurrency 32784 -i 20 -w 512) i get only 80Khahs??? I have AMD catalyst 13.11 beta 9, should i get never drivers even that those are reported to be the best for r9 290x?
Dunno if it will help, but these are some epic configs: http://rumorscity.com/2013/12/03/litecoin-gpu-mining-with-amd-r9-290-and-r9-290x-sweet-spot-for-1000khashsec/Justin Soo who wrote the article are awesome - I used to guide to undervolt my MSI R9 280X, Justin is pretty helpful if you post on the page. Highly recommended. |
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Hi all, I live close-by and shall be paying them a visit on Monday (as I want to be sure the building is physically open).
If I find a team there, and it all seems legit I will be ordering 1-2 units there and then.
As soon as I arrive home I will post up all info/photos/videos of my visit.
See you Monday!
JOINTSTARR
I appreciate you time and effort and look forward to your evidence.... BUT, how are you going to prove we can trust you..? you've just become member couple weeks ago and have 1 post under your belt. No, offence but how do we know you're not on the dark side and actually working with them. I am a graphic designer. I do not intend to be rude, I am just curious: what interest does a graphic designer have in highend bitcoin mining equipment? Are you planning on buying a $7000 unit? |
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Great! 800 Kh/s is not too bad.
Good place to start, now that you got the fundamentals right.
It takes some tweaking to find the sweetspot.
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I know that mining is not profitable at all due to rising difficulty caused by "mining-noobs", losing a lot of their money.
If the block reward exceed the cost in electricity and roi is impossible then will some miners (with lower hashrate = lower probability to find the block) shut down, and then will the difficulty go down, and then will roi be possible for others. The system will self-adjust to a level where there is a profit for the miners. You won't see this happen in the next few years. Because most miners dont think rational like that. They think like: Bitcoin is going to rise in value, so it makes sense to mine. But they don't see that their revenue would be significantly higher by a direct investment in btc. I think you are underestimating the intelligence levels of miners... Sure you can find single cases that support your statement, but the majority of the network is commercial now. |
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Have you tried this?   Obviously, some mobos need it to recognize that a slot is occupied (more info here: http://blog.zorinaq.com/?e=42) By the way, I've got the same PSU as yourself. Are you sure that it is adequate for three R9 280x? Cheers I don't believe that the AX860 is a good choice for 3 x R9 280X, measured 1 x R9 280X (undervolted) with a current clamb, at full hashing the power was about 270W, that will be 810W in total, leaving 50W for everything else, you can properly squeeze 5-10% more of of the AX, but I would not recommend it, as the derating of the components will proberly lead to short life time of the PSU. I believe that the AX860 is a PSU you can have for many many years if you dont punish it too hard. |
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Guys does anyone has aprox number how many shares should i get on 500Khahs speed in lets say 1 hour, or maybe 1 day?
That is impossible to say, depend on the difficulty, Which for some coins change a lot. It also depend on the pool, and pure luck. Its much better to estimate on basis of coins per day: http://www.coinwarz.com/cryptocurrencyIts ok to have 0-3% invalid/reject/stale shares, if you have more then look at your setting or pool connections. HW errors is imo not acceptable in any case (unless you know what you are doing). |
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Thank you guys for all help here, i have solved now all problems except 1:
Hash rate reported on pool is much lower than what is on my GUIminer. GUIminer says 700khahs per card, coinotron pool says 100Khahs. I have tried changing settings all arround with no much luck.
Have you checked in your cgminer stats if you have many reject or HW errors? The pool hashrate is only based on valid shares. |
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Yeah, you can make two workers
just call cgminer two times using the -d switch:
cgminer.exe -c configfile0.conf -d 0
cgminer.exe -c configfile1.conf -d 1
Then is GPU 0 "OFF" in the first process, and GPU 1 is "OFF" in the other process.
This can be useful if you want separate worker for each card.
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