Cryptocoin Mining?

[thilanliyan]

Heat does not rise. Hot air rises on Earth due to buoyancy effects.

Yes, I know "heat" doesn't rise (as I said, "heat" or energy flows from hot to cold, but maybe bad wording on my part), but what exactly would the hot air do in his basement?

From my understanding (vaguely remembering my heat and mass transfer course from like 7 years ago), the energy contained in the hot air would just flow down into the colder areas of the basement and then into the ground, so it wouldn't be heating the rest of the house up. That correct?

 

[thilanliyan]

Cool, I'm going to keep this one in mind and try it out the next time litecoin mining makes sense for me.

I'm using wemineltc.com. Had a couple of hiccups last week but it has been good so far. It is a PPLNS pool with 0% fee but they ask for 1-2% donation.

 

[jaedaliu]

Yes, I know "heat" doesn't rise (as I said, "heat" or energy flows from hot to cold, but maybe bad wording on my part), but what exactly would the hot air do in his basement?

From my understanding (vaguely remembering my heat and mass transfer course from like 7 years ago), the energy contained in the hot air would just flow down into the colder areas of the basement and then into the ground, so it wouldn't be heating the rest of the house up. That correct?

Nah.

The computer generates heat, which is transfered via heat sink as hot air, which flows up.

The air molecules bump up against the ceiling molecules, which absorb the kinetic energy. THat kinetic energy gets transferred out, heating the ceiling --> floor --> upper levels.

But you're right, putting the computer in the basement lets the separate basement act as a heat sink so that the heat from the computer isn't felt as much upstairs.

 

[Binky]

I'm just in the process of tweaking my GPU voltage. How does instability usually manifest while mining? Invalids? Driver crash/recover? Artifacts?

If you tweak slowly, most often it's driver hangs (and recoveries). Tweaking in larger steps might get you the occasional hard lock. I don't often see artifacts on 12.x drivers but I see them a lot with 13.x drivers.

Also watch out for power settings. I've seen more than one system lock during the night due to power/sleep settings.

 

[wbynum]

Litecoin mining is only 101% of bitcoin value right now. Are there even any good litecoin pools? The one I was using stole 25% of everyone's earnings a few weeks ago. The others seem to have very high fees or are just unreliable. BTCGUILD is like a rock, I haven't seen it go down for any appreciable length of time ever, and never had any problems with stolen funds or other shady activity by the pool operator.

Yea, unless one thinks that LTC will be more profitable than BTC in the future and hangs on to the LTC coins until then, there is no reason to mine LTC currently over BTC. IMO, to make up with the instability of the LTC pools, the more "picky" LTC is about mining, etc LTC profitability needs to be a good 25% or more over BTC to make it worth mining LTC over BTC.

Side note: Back in it's infancy (summer 2011), BTCGuild was just as unstable as LTC pools are today. Amazing what a couple years and probably a decent amount of money made can do for stability.

 

[pm]

Yea, unless one thinks that LTC will be more profitable than BTC in the future and hangs on to the LTC coins until then, there is no reason to mine LTC currently over BTC. IMO, to make up with the instability of the LTC pools, the more "picky" LTC is about mining, etc LTC profitability needs to be a good 25% or more over BTC to make it worth mining LTC over BTC.

I agree with you, LTC needs to be worth more than BTC simply to overcome the slight annoyance factor of LTC mining.

LTC difficulty will rise to 400 today according to allchains.info, which - at current prices - means BTC will be more profitable (if one's BTC MH/s rate is equal or higher than one's LTC kh/s, which it is in my case). I may switch back tonight...

 

[Silverforce11]

Here's the ref 7970 in action, OC to 1.2ghz and at 1.2vcore (its stable for a few hrs at 1.193v, wacked it up a bit for extra headroom):

Amazing what a new application of good TIM can do. 45% fan speed OCed.

 

[Mir96TA]

take -v out from extra flags

 

[KentState]

So downclock the VRAM and up the GPU clock is the preference for mining? Mine is shooting flames out the back at stock speeds and starting to throttle.

 

[Silverforce11]

take -v out from extra flags

Drops to 642Mha/s without the -v, i only mine when im not gaming. Desktop web surfing for some reason works fine with -v in it.

 

[njdevilsfan87]

So my 7950, mining at about 520 Mhash/s in BTC Guild, if I calculated right, made me about $0.90 worth of BTC in the past 24 hours. Is this right? Seems kind of low. I was expecting maybe $2-$3 worth.

24 Hour Earnings : 0.005764

Also. PPS vs PPLNS - is one or the other better?

 

[chimaxi83]

Looks like Mtgox announced they're adding LTC support soon. Thoughts? Spike in value once it's official?

They mentioned it in an FAQ posted today here.

 

[x3sphere]

Glad I held my LTC. Sitting on around 700 coins right now

People will buy it up when it hits Gox, I wouldn't be surprised if it hits $15-20.

 

[chimaxi83]

Glad I held my LTC. Sitting on around 700 coins right now

People will buy it up when it hits Gox, I wouldn't be surprised if it hits $15-20.

Yeah, I was thinking the same thing. I only have around 200 though heh

 

[philipma1957]

So my 7950, mining at about 520 Mhash/s in BTC Guild, if I calculated right, made me about $0.90 worth of BTC in the past 24 hours. Is this right? Seems kind of low. I was expecting maybe $2-$3 worth.

24 Hour Earnings : 0.005764

Also. PPS vs PPLNS - is one or the other better?

what are your fees? maybe that .005764 is after fees. it seems to be a bad number.

this calculator

https://bitclockers.com/calc

gets .02914 a day with 520 hash and 8,974,296 difficulty as the norm.

As i said i do not know your fee rate. Also variance could mean you had a bad day and tomorrow you could mine .05 giving you a 2 day total of .055764 which is close to 2x .02914 but the numbers i am tossing about are before BTC guild fees.

 

[Piotrsama]

So downclock the VRAM and up the GPU clock is the preference for mining? Mine is shooting flames out the back at stock speeds and starting to throttle.

Yes, downclock the memory using afterburner. 300 mhz should be good.
Temps should go down after that.

 

[BallaTheFeared]

I have a bit over 6 LTC...

/Sad panda

I was hoping to get some stock in them before it jumps, hopefully I still can or I was stupid and spent $310 on another TF3 instead of buying $310 of LTC @ $2.5

 

[pandemonium]

holy shit. something happened yesterday with the power in my house. 2 of 3 PCs have toasted power supplies (the ones with the 7950s of course). one of them also had the motherboard go out.

running at 19% till late friday when parts come in.

Ouch! No UPS?

 

[24601]

I have a bit over 6 LTC...

/Sad panda

I was hoping to get some stock in them before it jumps, hopefully I still can or I was stupid and spent $310 on another TF3 instead of buying $310 of LTC @ $2.5

Maor cards, maor fun

I have 2x 7970s and 2x 7950s now and one of my 7970s isn't even running until I move to a place with air conditioning since my room is 87 degrees or over now :O

Buying is always more advantageous on an upturn, but since you're on a hardware enthusiast forum, I'd say the value of fun in the process is very high on your list of priorities .

Also look forward to trying Quadfire whenever (if ever) I get an x79 or Haswell-E system

 

[birthdaymonkey]

If you tweak slowly, most often it's driver hangs (and recoveries). Tweaking in larger steps might get you the occasional hard lock. I don't often see artifacts on 12.x drivers but I see them a lot with 13.x drivers.

Also watch out for power settings. I've seen more than one system lock during the night due to power/sleep settings.

Thanks! So far so good at 1100 1.13v.

I will say that of the three mining cards I now own, Sapphire 5870 and 7950 and an Asus DCII 7790, the 7790 is the best pure mining card of the bunch.

For $150, it pulls in 300 mhash and makes much, much less noise and heat than the other two cards. In fact, it's currently running at 64 degrees in a Silverstone GD05 HTPC case, overclocked to 1200 on stock volts.

 

[turn_pike]

I was shopping around for some VPS host when I realized many of the hosting companies are accepting bitcoin. Some at a highly marked up price while others are very competitive i.e. same price as if you were to use usd.

One week of mining using lowly 6870 is enough to buy me several months of VPS. Thats pretty neat and made me really want to buy a 7950. Unfortunately the only one I see on sale is a blower fan type.

Edit:
Has there been a difficulty increase lately ?
Bitminter java miner client says that I make 0.0147 btc per day when it used to be around 0.017 when I first experiment with it.

 

[Silverforce11]

Nasty spike down in the price.. crazy volatility!

 

[Rikard]

How do you secure your wallets and/or protect yourself from hacks? I do not really hold anything of value myself, but apparently some of you do. (And looking in the order history at BTC-e I just saw somebody buy LTC for $35000 so I guess people have thought about getting hacked...)

 

[Zargon]

ideally you would keep one offline, it never has to see the internet. ever.

as long as you know the wallet address.......the networks puts the coins there

as far as I understand it

 

[Chiropteran]

So my 7950, mining at about 520 Mhash/s in BTC Guild, if I calculated right, made me about $0.90 worth of BTC in the past 24 hours. Is this right? Seems kind of low. I was expecting maybe $2-$3 worth.

24 Hour Earnings : 0.005764

Also. PPS vs PPLNS - is one or the other better?

Your 24 hour earnings should be 3-4X that. The 24 hour earnings figure isn't accurate until you have been mining for more than 24 hours straight.

PPS is guaranteed income at a consistent rate, you get paid per share your produce regardless of the number of blocks found.

PPLNS is based on the number of shares you have in each work period in which a block is found and nearby work periods in some cases. It's sort of a complex formula intended to destroy the incentive to pool hop, but in the end if you consistently mine your income is based in part on the number of blocks found.

Overall, PPLNS gives slightly more earnings because the fee is 3% instead of 5%, but those earnings will be more random and depending on variance sometimes PPS may give better earnings.