Cryptocoin Mining?

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markyh

Member
Apr 7, 2013
74
0
0
It looks like the guy wants about 2 bitcoin (or about $220 at today's spot price) for one of these things.

If I can get one for $50 six months from now, count me in if mining is still somewhat profitable then.

Agreed. Three points.

1) 300m/h is nothing, for less than 3 BTC I have 5G/hash coming in the next few months from BFL.

2) With a GPU I can mine SH256 and scrypt cryptocoins.

3) I've been watching second hand prices on all 7950 cards on Ebay.co.uk for three weeks now. You can't buy one, even a strock one for less the £170 secondhand!!! And this card has been on the market for well over 12 months. I can buy new for £230 and get 600m/h or 630k/h out of it.

Once difficulty rise makes me give them up in 6 months or less I can still flog them on ebay for at least £100, if not more if the HD8000 series has not launched.

With this, when 300m/h makes you $1 a day or less in six months what is it's worth. Fuck all.

M
 

blastingcap

Diamond Member
Sep 16, 2010
6,654
5
76
Lol what a stupid opinion, simpleton. I don't care either way about AMD or Nvidia, I just enjoy calling out idiots on both sides of the fence. You come off as knowing my post history, so you'd know that if you actually did know anything about my post history. I own, have owned, and will continue to own hardware from either side.

What about my predictions? They are based on limited info (who would have predicted ASICs delay and a price surge like that? You? Don't make me laugh). Just because my predictions aren't always right doesn't mean they are always wrong, and we have already seen that $266 was a bubble, just as I had said. Whether we are in a dead cat bounce or already hit the nadir, I don't know for sure, but I wouldn't be surprised either way.

Also, on 4/3/2013 I said in this thread that difficulty would double or triple in a month or two even if Avalon, FPGAs, and GPUs were the only drivers. On 5/7/2013 we see GH/s rate has gone up from 45 to 80 GH/s between 4/3/2013 and 5/7/2013, so it's taken a little over a month to double, and it may well triple after another 4 weeks. So my prediction was accurate on that, too.

Now we have BFL shipping, ASICminer shipping, Avalon is spamming ASIC chips, and many people on bitcointalk are thinking that difficulty will go up another 7-10 times over the next few months. There are TONS of threads on ASIC and FPGA shipments past, present, and future and only the willfully ignorant would ignore that. Latest predictions on bitcointalk are inthe 7-10x difficulty range by August. A drop of 70-90% revenue means more than 70-90% drop in profits if you have any operating costs at all such as electricity. I have never ever said it wasn't economic to mine on a card you got for other reasons, just cautioned against buying a ton of GPUs right now. It's a gamble on prices remaining high and difficulty not increasing so fast that it makes the entire enterprise uneconomic. It's not "doom and gloom" to advise against gambling unless you really understand the risks.

Your post history almost speaks for itself. http://forums.anandtech.com/search.php?searchid=1216444

In your most recent page of posts alone, we have you calling me a "simpleton" with a "stupid opinion." Cussing at "dumbasses" who had the temerity to disagree with you. Telling people to "stop whining like a bitch." Picking a fight with Fx1 with the oh so mature "you mad bro?" Posting an image that got you a moderator smackdown probably because it was about as mature as your other posts. Another "you're the bitch" rant. And that's just your FIRST PAGE of post history.

Your slant has been there for ages.

Most recent:

http://forums.anandtech.com/showpost.php?p=34942766&postcount=34

And since the beginning:

http://forums.anandtech.com/showthread.php?p=34465762&highlight=#post34465762

And in many posts in between, such as:

http://forums.anandtech.com/showthread.php?p=34905580&highlight=#post34905580 (hypocritically following your accusation that OTHERS were trolling)

http://forums.anandtech.com/showthread.php?p=34884763&highlight=#post34884763

Etc.

Don't gimme that "I own both sides" b.s. That's almost a time-honored tradition around here, to say you can't be biased because you've owned both sides, even though you mostly rag on one side and one side only. Not to name names but it's almost comical how I've seen people claim to own NV or AMD hardware and then crap on it all the time anyway. It doesn't prove anything. Keysplayer owns AMD hardware from time to time, but it doesn't change which side he's on.

Your biases aside, you've been shockingly rude to a lot of people on here. I have no idea why you're not banned already. In fact, I'm not sure why you aren't on my Ignore list already. Welcome to my ignore list.
 
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Zargon

Lifer
Nov 3, 2009
12,218
2
76
Isn't it like 420 mil worth? The 260 bubble popped value over a billion USD. And more coins mined since then
 

markyh

Member
Apr 7, 2013
74
0
0
Isn't it like 420 mil worth? The 260 bubble popped value over a billion USD. And more coins mined since then

No, market cap is still well over $1 billion. figures are posted on bitcoin watch. www.bitcoinwatch.com.

Also, something really interesting is happening in LTC. Due to many jumping ship to more profitable Feathercoin since it became tradeable on BTC-e on 2nd May, Litecoin difficulty is now dropping due to the loss of network hashrate!

Difficulty was 482 yesterday, today ir dropped to 396 and is forcast to drop again to 340 in 3 days time.

Each LTC difficulty drop brings it's daily profitability closer to feathercoin. For me it's currently $6.94 daily profit for FC and $4.50 for LTC.

I give it 2 weeks max before FC has difficulty increases and LTC difficulty drops that LTC becomes more profitable again and people jump ship back to LTC from FC.

This could yo yo on network hash rate weekly after that until value/$ decideds a clear winner.

Interesting times, with BTC network difficulty set to rocket too over the next few months.

M
 

wbynum

Senior member
Jul 14, 2005
302
0
0
For those doing LTC mining with 7950's, what cgminer flags and what core and mem clocks are you running? I can not seem to get above ~520kh per card (3 cards at 1000mhz core, 1250mhz memory). Unlike my 7970's, dropping core down to ~950 and memory up to ~1575 only made things worse. I am currently running the followin flags in cgminer:

--thread-concurrency 8192 -I 13 -g 2 -w 64

The system only has 2gb of ram. I have seen others post that you need more system ram for scrypt mining, but my ram usage is only ~500 megs. Task manager shows ~600 megs free and 700 megs available.

Another odd thing I noticed is on my 7970's with the same above flags scrypt mining uses around 2.4 gigs of GPU ram. On this 7950 system it is only using 1 gig of GPU ram. Any ideas?
 

chimaxi83

Diamond Member
May 18, 2003
5,456
61
101
Your work size should be at 256. Other than that, you will probably just have to play with clock speeds until you find what works best. There is no general guideline because every system seems to hash at different speeds when it comes to Scrypt.

Here are my settings in GUIMiner, which get me 660 Khash per card. Cgminer doesn't really do anything that GUIMiner doesn't, as far as what I need

 

KentState

Diamond Member
Oct 19, 2001
8,397
393
126
Your work size should be at 256. Other than that, you will probably just have to play with clock speeds until you find what works best. There is no general guideline because every system seems to hash at different speeds when it comes to Scrypt.

Here are my settings in GUIMiner, which get me 660 Khash per card. Cgminer doesn't really do anything that GUIMiner doesn't, as far as what I need

Maybe Feathercoin is different, but I only get around 430 Khash/sec, but my GPU core is clocked higher. I take it that scrypt mining doesn't benefit as much from higher clocks?
 

markyh

Member
Apr 7, 2013
74
0
0
For those doing LTC mining with 7950's, what cgminer flags and what core and mem clocks are you running? I can not seem to get above ~520kh per card (3 cards at 1000mhz core, 1250mhz memory). Unlike my 7970's, dropping core down to ~950 and memory up to ~1575 only made things worse. I am currently running the followin flags in cgminer:

--thread-concurrency 8192 -I 13 -g 2 -w 64

The system only has 2gb of ram. I have seen others post that you need more system ram for scrypt mining, but my ram usage is only ~500 megs. Task manager shows ~600 megs free and 700 megs available.

Another odd thing I noticed is on my 7970's with the same above flags scrypt mining uses around 2.4 gigs of GPU ram. On this 7950 system it is only using 1 gig of GPU ram. Any ideas?

You need more system memory. About 2-3GB per card, min of 4GB. I could not get my one 7950 over 400k/h on 2GB no matter what afterburner settings I tried. Upped it to 4 GB and bang............was able to use GUIminer default 7950 (High) settings tab straight off an 625-630 k/hash.

Then it was a case of maxing out memory speed, getting GPU speed as high as poss to good ratio to memory vs the lowest vcore I cold force that was stable. I will try and post a screenshoot later.

M
 

markyh

Member
Apr 7, 2013
74
0
0
Maybe Feathercoin is different, but I only get around 430 Khash/sec, but my GPU core is clocked higher. I take it that scrypt mining doesn't benefit as much from higher clocks?

Read my detailed post on setting up a 7950 with GUIminer scrypt on page 180 of this thread.

550 -630 k/h should be easily available for scrypt with the right settings, drivers and amount of system memory. However to get above 600k/h you probably need the "boost" edition higher spped 7950's.

Mines the MSI R7950 TF3 boost but HIS, Sapphire and others do them too.

M
 

markyh

Member
Apr 7, 2013
74
0
0
Maybe Feathercoin is different, but I only get around 430 Khash/sec, but my GPU core is clocked higher. I take it that scrypt mining doesn't benefit as much from higher clocks?






These are my MSI R7950 settings. You can see I was running live mining Feathercoin (scrypt) @ 629 k/hash when i took the screenshot.

M
 
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J Macker

Member
May 5, 2013
25
0
66
hey guys....

I had an old forum account a long time ago, but couldn't figure it out.

Anyhow, I just thought I'd check out your discussion on mining and leave a little tidbit for you:
http://hardforum.com/showpost.php?p=1039849038&postcount=425

Currently I'm reaching 10,600 kH/sec with 19x 7950's and one 7870 tahiti.
The 7870 is a pain; I can't get it over 350. Average is 540 kH/sec per 7950. I'm going to be tweaking a little more to reduce power consumption and improve efficiency.

One of the hardforum guys just made a new LTC pool. The stale rates are SUPER low.
Here's my stats at the new Invasionnetwork.com pool:
Your Valid: 1162850
Invalid: 1233
= 0.00106
~ 0.11%

Anybody is welcome to join. The creator is Jzegers24 at hardforum and he's very helpful. His pool has the lowest fee around and the lowest stale rates I've seen. Typical stales from other pools are >1%, so effectively I'm earning 1.5% more by using invasionnetwork.com

 

KentState

Diamond Member
Oct 19, 2001
8,397
393
126
Not sure why my 7970 in my sig can barely get 450 with the same settings. Wonder what else I'm missing?
 

wbynum

Senior member
Jul 14, 2005
302
0
0
Scrypt mining is plain annoying. I've got a 2gb DDR2 system with two 7970's that has no problems hashing at ~650 kh per card. No luck with the 7950's though. Tried 8gb of ram, etc. Not sure how people run at -I 20. CGMiner either says the gpu's failed to start or the start and then the driver crashes promptly. I guess maybe the default high voltage or something. I run all my stuff at 1025mv or 1050mv.

Guess I will just be happy at ~510 kh per 7950 under LTC mining. Rock stable and currently 50% more profitable than BTC mining.
 

markyh

Member
Apr 7, 2013
74
0
0
Scrypt mining is plain annoying. I've got a 2gb DDR2 system with two 7970's that has no problems hashing at ~650 kh per card. No luck with the 7950's though. Tried 8gb of ram, etc. Not sure how people run at -I 20. CGMiner either says the gpu's failed to start or the start and then the driver crashes promptly. I guess maybe the default high voltage or something. I run all my stuff at 1025mv or 1050mv.

Guess I will just be happy at ~510 kh per 7950 under LTC mining. Rock stable and currently 50% more profitable than BTC mining.

As mentioned above, I found you need system memory to match GPU memory GB for GB. Also are you using catalyst 13.3 beta drivers or newer? I jumped at least 60-70 k/hash moving from 12.8 to 13.3 beta.

M
 

birthdaymonkey

Golden Member
Oct 4, 2010
1,176
3
81
Wow, I am having no luck with scrypt mining either.

I tried markyh's settings and was getting 400khash at 1088/1600 and worse at 1050/1500. Not to mention the fact that my computer was basically unusable while it was running. Not sure what I'm going wrong... drivers maybe? I'm on 13.5 beta 1.

I can mine 592mh all day with BTC and still use my computer. Maybe LTC is just not for me!
 

Binky

Diamond Member
Oct 9, 1999
4,046
4
81
LTC/FTC mining on a machine you use often is not the way to go. To keep it usable, you have to turn the intensity down so much that the output is nearly halved.
 

birthdaymonkey

Golden Member
Oct 4, 2010
1,176
3
81
LTC/FTC mining on a machine you use often is not the way to go. To keep it usable, you have to turn the intensity down so much that the output is nearly halved.

That's too bad. The nice thing about BTC mining is that you can just do it on the side (for now at least) - you don't need a separate rig.

I was able to get ~600khash after rebooting(?), but as you say the machine wasn't usable at -I 19 or 20.
 

wlee15

Senior member
Jan 7, 2009
313
31
91
LTC/FTC mining on a machine you use often is not the way to go. To keep it usable, you have to turn the intensity down so much that the output is nearly halved.

If you use 13 Intensity, 8192 thread concurrency, and 2 gpu threads with cgminer you can get about 90% of what you would get if you pumped up the intensity.
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
I'm considering a 7990 for gaming and Bitcoin mining. Will I be better off Litecoin mining?
 

Mr. Pedantic

Diamond Member
Feb 14, 2010
5,027
0
76
0_o;

... and many others like him are the reasons why AMD marketshare surveys should be taken with a grain of salt, since their rigs are not for gaming and thus do not contribute to the overall "numbers" seen by online monitoring.

Well, the same thing is the case for NVidia's GPUs with Folding@home. Not sure how it is at the moment, but last I looked into it GPU folding was making a comeback with the QRBs. Maybe we'll get another Atlas.
 
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