Bitcoin / Litecoin setups ?.

[RimBlock]

Anyone running any bitcoin or Litecoin mining rigs at the moment.

If there are then what are you running and what sort of MHash / BC / LTC turnover are you seeing.

I am possibly looking to put a small unit together for LTC as BC will be owned by the ASICs when they become more mainstream.

RB

 

[cactus]

I am going to get my HD7970 and HD6950 running soon. Even with my expensive power, I can make money in the $130 range.

 

[gigatexal]

the price of bitcoins has gone so high lately, it's insane.

 

[cactus]

Oh crud! $240 high today at Mt Gox! I fear I wont get a bitcoin before the bubble pops...

 

[Patrick]

I sold mine off awhile ago (oh well). STH's lab has grown to the point where power is an issue. This is somewhat interesting though.

 

[nitrobass24]

I have two Radeon 6950s mining LTC.

the return is about 35% better than on BTC...even with BTC insane prices.
With my power, I am profiting approximately $300/month with these two GPUs.

 

[gigatexal]

how do you exchange litecoin for usd?

 

[gigatexal]

What's your litecoin per hour? how many hours to get a coin?

 

[RimBlock]

Cool, decent number of people doing this or interested .

I have been playing around with hardware possibilities and am sort of with the following;

ASUS P5Q Pro (5x PCIe slots - 2* x16 & 3* x1) - already have from my old SAN
C2D E8600 (IIRC) cpu - already have from my old SAN.
2x MSI 7950 OC (R7950-2PMD3GD5/OC) - Coming tonight (second hand).
Lian Li T60 testbench - already have.
Seasonic 660W PSU (IIRC) - already have.

Temptation;
3x 7970 to make all 5 cards using PCIe x1 -> PCIe x16 risers.
New higher power PSU .

At current rates it should pay for itself in under 2 months.

My understanding is;
- PCIe slots count and not lanes as bandwidth is not much of a consideration.
- You can mix and match different models of the same gen cards in a single setup (i.e. 7950 with 7970 but not 7950 with 6950).

To try and give some structure, it would be great to know from others...
- CPU & Motherboard
- Video cards
- PSU
- Hash rate
- Power usage
- Software used (OS & mining software).

I really must get one of the power measuring plugs .

I also need to find another place to house this as if I put it in the computer area with my rack then it is going to go from a sauna to a torture chamber.

Another MB & Cpu combo I was looking at was the AMD Sempron 145 Processor and ASUS 890FX/SB850 Crosshair IV Extreme (5x PCIe x16 but would need risers due to slot spacing).

Mining Calculator here.
Bitcoin Mining hardware comparison here.
Litecoin Mining hardware comparison here.
Bitcoin Market rates here.
Litecoin Market rates here.

RB

 

[nitrobass24]

So with my 2x 6950s I am pulling in about 4.5 LTC/day. So depending on the exchange rate thats around 16-20 dollars a day before costs.
Once you mine the coins you request a payout from your pool, which then goes to your wallet. You can either manage you own wallet with the Litecoin software, or use an online one. For convenience I use an online wallet, with BTC-e.com, but if you are paranoid or worried about hackers then just roll your own, encrypt, backup.

Once they are in your wallet(possession) then you can exchange them for BTC,EU,USD, etc. on an exchange like BTC-e.com and soon mtgox.com. Then from there to paypal, dwolla, then to your bank account.
Seems like a lot of work, but its really not. I just let mine collect in btc-e.com.

When i need it i will pay the fee and transfer it to paypal or whatever.

 

[Patrick]

Actually - network storage is good since you can boot off of shared storage and save a disk per node and power for the drives.

If someone is putting together a GPU system with PCIe risers might be able to help a bit on a platform.

 

[RimBlock]

Ok, now I am throughly confused.

I thought I would put a little money in to LTC at BTCe but it seems actually getting real money in to the system is actually quite difficult.

I can deposit money with OKPay but I have to have money in OKPay before I can move it to BTCe (unlike Paypal where it can be debited straight from a card). OKPay charge 2%. You need to be verified with OKPay to deposit real money (ie no from another eWallet service) and of course bank exchange rates and transfer fees apply.

It will be interesting whay US$100 turns in to after all the transfers to transfers to transfers and various service or exchange fees take effect.

I can use one exchange local to me who charge a 6% fee on transactions but with very little trading or another local eWallet provider who seem to charge 36% (i.e. US$1.36 = US$1 with OKPay).

If anyone knows of a fairly easy way to get some money on BTCe then please let me know. Just fancied playing with US$100 against some LTC day trading.

RB

 

[gigatexal]

hmm...4.5 coins a day from two 6970s is pretty good. I calculated the following:

300W power draw from 7970s x 6 (3x in one box, 3x in another) for 1800W, plus some low profile cards in the C6100 4x 200W or 800W for a total hourly wattage 2600W per hour. 2600 x 24 x 60 = 1,872,000 watts a month (d=30). dividing by 1000 to get to kwh and then multiplying by .2 cents per kwh I get 374.4 USD a month in just power bills.

with the 7970s doing 675 khashs and the 7750s doing 100 khashes each thats a total output of 400 khashes + 675*6 or 4450 khashes/s

Mining Calculator | litecoinpool.org - i bumped the difficulty to 300 and it shows about a 2100 dollar payoff.

according to btc-e LTC/BTC is .0211 or LTC to USD is 4.75001. and btc is trading at 224 usd.

0.62072810 LTC an hour is 2.948464682281 USD per hour (0.62072810 * 4.75001)

basically if prices stay high i'll be ok

prices should rise with difficulty right?

each 7970 is still 400 and each 7750 is 100 so 400x6 is 2400 plus 400 for the 7750s makes 2800 in the hole plus 375 for the month in power. 3175 in the hole with 2100 payoff in the month leaves me 1075 to make up next month plus the 375 so by about 3/4 of the way through month 2 it will pay off and as long as prices remain things will be profitable.

still trying to see if this is worth it

 

[nitrobass24]

try this calculator Bitcoin mining profitability calculator | Bitcoinx

You can use it for LTC too, just change the values: difficulty, payout, Mhashs-->Khashs, exchange

 

[TheBay]

My friends managed office is inclusive of electricity so we are putting a few boxes up there to do a bit of mining

 

[RimBlock]

bit of a rollercoaster.

Down from US$260+ to around US$166.

Still up on 10 days ago though which was around US$100.

My two new (second user) 7950s will now take twice as long to break even and I think I will stop with just those two for now.

Clearly they read this thread and saw I was looking to invest so scattered .

RB

 

[Spotswood]

I build all aluminum trays designed specifically for mining rigs with multiple GPUs. When using ribbon cables, the expansion card mounting beam can be raised and there is another beam to support the tail end of the cards up and over the motherboard.

 

[RimBlock]

Hi Rich,

Yes I did think of you when looking and trying to work out how to mount up to 5 cards so they would get reasonibly cooled.

Sticking to the 2 cards I have for now especially as the price has tanked to the point were the unit will just about pay for the power it will use .

Will shoot you a PM for a guide on pricing should things even out a bit and I choose to upgrade at a later time.

RB

 

[Patrick]

I build all aluminum trays designed specifically for mining rigs with multiple GPUs. When using ribbon cables, the expansion card mounting beam can be raised and there is another beam to support the tail end of the cards up and over the motherboard.

I use three of these stacked. Bought when I was doing Folding@Home and bitcoin but that only lasted about two weeks.

 

[cactus]

Anyone have multi gpu mining on linux working? I cant get cgminer to use anything but the first GPU.