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getting into bitcoining?

woot! I found the last block =) Maybe the second block i've found since I started mining a couple months ago
 
Been looking around for some good motherboards to get a couple mining rigs started and came across the MSI 890FXA-GD70 as it was one that I have targeted from my limited research. Of course I got super excited for about 5 seconds when I found out that they are available at FRYS.com for $100 with a $40 rebate. It's times like this I curse myself for not living next to either a FRYS or Microcenter.

Anyone got any recommendations for motherboards that make good mining rigs.
 
I have an ASUS P8P67 WS and P8Z77 WS...both boards are good reliable boards designed for Quadfire/QuadSLI without extensions. Also have a Gigabyte GA-990FXA-UD3 that is good for x3 GPUs without extensions, four with...assuming you use only the x16 slots. All three boards have worked very reliably though i'd recommend going with the gigabyte only because its AMD and they tend to be cheaper systems overall.
 
I use a Biostar TE77XE4...room for 3 cards triple spaced. Celeron G1610.
 
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I use these MSI Z77A-G45, 7 cards without issue using 1x riser cables and intel G1610's. Surprisingly they are pretty good mobos too. I am surprised to say that I like them better than my Asus boards. With the exception of not having the ability of using offset voltage, but that doesn't matter for mining rigs. :)
 
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Anyone running 7790s? Best I've been able to get out of one so far is around 230 kH/s at 19 intensity. I actually had underclock my core all way to down to 800 from stock 1050 to get the highest has rate. I left memory alone at 1500 as increasing or decreasing it lowered my hash rate.

I can run -20% power, and GPU-Z reports only 40W from drawn by the GPU. It also runs a pretty cool 50-55C. But I though these were going to be good for 275-300 kH/s. I guess BTC hash rates really don't convert over into LTC hash rates. But still, even at 230 kH/s, for the price I paid and after selling the game bundle, it's still providing the best hash rate per dollar, before even factoring in power usage.
 
rive22 said:
I use these MSI Z77A-G45, 7 cards without issue using 1x riser cables and intel G1610's. Surprisingly they are pretty good mobos too. I am surprised to say that I like them better than my Asus boards. With the exception of not having the ability of using offset voltage, but that doesn't matter for mining rigs. :)
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Nice find with that motherboard, and what PSU(s) with that setup?
 
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Invasion pool hash rate must have doubled over the past 2-3 days. Nice advertising. Now we just need some graphs! :D
 
Metrocall said:
Nice find with that motherboard, and what PSU(s) with that setup?
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I use the Silverstone SST-ST1200-G's. 4x7970s on one and 3x7970s plus mobo and cpu on the other. They handle it like a champ and are very quiet too.
 
rive22 said:
I use the Silverstone SST-ST1200-G's. 4x7970s on one and 3x7970s plus mobo and cpu on the other. They handle it like a champ and are very quiet too.
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rive22, can you post pics and specs of your build including hastrates? A link would be cool if you already have it somewhere.
 
fwiw, I used a single PCP&C 950w psu to power 4x 7950's.
Each basket gets around 2300 kH/s.

For the extra psu cost difference it's about the same as building a second rig instead of running 7gpus on one mobo.
260x2 = 520 + mobo/cpu/ram/hdd (7x400+$520+120mobo+50cpu+50ram+40hdd) = $3580 for 4900kH/sec
$0.73 per khash.

4x7950 per rig:
($1200+130psu+100mobo+50cpu+50ram+40hdd)= $1570 for 2350 kH/s
for $140 + mobo/cpu/ram
$0.67 per khash

not including cost of risers/wifi adapter
 
Metrocall said:
I'm seeing that with that mobo, you can only actually use 6 cards at once, something about one of the slots disabling when another is in use, is that true?

http://hardforum.com/showthread.php?t=1760645
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Now that you mention it, I did have an issue in the beginning. I thought it was a faulty mobo. I'm not sure what it was that made it work, but it's working. I switched to powered riser cables, I don't know if that makes any difference. I did have to do many reboots and tinkering around with the slots to get it to recognize all 7 cards. I'm also using the latest beta drivers and dummy plugs on the back of the cards. Good point worth noting though to anyone that is interested in this mobo.

leeleatherwood said:
rive22, can you post pics and specs of your build including hastrates? A link would be cool if you already have it somewhere.
Click to expand...

I'm in the process of moving everything around as the heat and noise is unbearable and for the moment there isn't a lot of free space to use. I haven't even started working on tweaking the overclocks yet, but at 1050/1500 I'm getting 722-735Kh/s per card with litecoin. I actually stumbled on that number by accident, as it's not even of the .57 mem/core ratio that many people have great success with. Litecoin is definitely picky about the ratio, if I bump one or the other in any way the numbers go down, and even if I take the current .7 ratio and raise it the numbers go down, so it's going to take some messing around with. All in all though I'm very pleased that these cards broke the 700 barrier at such low clocks leaving more room to go. Bitcoin can hit the same in the megahashes if you bump the core to 1200. I had a hard time getting some of the cards stable at 1200 but 1115-1150 is pretty much a breeze.

J Macker said:
fwiw, I used a single PCP&C 950w psu to power 4x 7950's.
Each basket gets around 2300 kH/s.

For the extra psu cost difference it's about the same as building a second rig instead of running 7gpus on one mobo.
260x2 = 520 + mobo/cpu/ram/hdd (7x400+$520+120mobo+50cpu+50ram+40hdd) = $3580 for 4900kH/sec
$0.73 per khash.

4x7950 per rig:
($1200+130psu+100mobo+50cpu+50ram+40hdd)= $1570 for 2350 kH/s
for $140 + mobo/cpu/ram
$0.67 per khash

not including cost of risers/wifi adapter
Click to expand...

I saw your post in the other thread, nice setup for sure man :). One of the reasons I chose the 7970s was the limited space issue. I did the math and the numbers were close enough to my liking, I figured it pretty much came down to the overclock. There's still plenty of OC room on the 7970s and that should make up the difference and make them about equal to the 7950s price wise. Either card really though, is the way to go for sure. These babies rock.

I can snap some pics later on if yall like. I built my racks out of 1x2's strips of wood, so it's not the prettiest, but it definitely does the job. I'm going to redo them in Aluminum in a few weeks or so.
 
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rive22 said:
I'm in the process of moving everything around as the heat and noise is unbearable and for the moment there isn't a lot of free space to use. I haven't even started working on tweaking the overclocks yet, but at 1050/1500 I'm getting 722-735Kh/s per card with litecoin. I actually stumbled on that number by accident, as it's not even of the .57 mem/core ratio that many people have great success with. Litecoin is definitely picky about the ratio, if I bump one or the other in any way the numbers go down, and even if I take the current .7 ratio and raise it the numbers go down, so it's going to take some messing around with. All in all though I'm very pleased that these cards broke the 700 barrier at such low clocks leaving more room to go. Bitcoin can hit the same in the megahashes if you bump the core to 1200. I had a hard time getting some of the cards stable at 1200 but 1115-1150 is pretty much a breeze.
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Damn, I have a 7970 but cant get it to go past 600 KH/s. Ive played with clocks but really I don't see it make any difference at all, I can drop the GPU down to 800 and only lose like 10 KH/s.

My coworker ordered 4x 7970's and will be here on friday, so I would like to get some solid settings by the that time. I will just keep messing around I guess.
 
leeleatherwood said:
Damn, I have a 7970 but cant get it to go past 600 KH/s. Ive played with clocks but really I don't see it make any difference at all, I can drop the GPU down to 800 and only lose like 10 KH/s.
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The card that my monitor is plugged into gets low 600s when I'm actively doing anything in the OS. If you're using windows, disabling all the eye candy will help. Any other cards you add will have full potential.
 
dwolla just got shut down for mt.gox payments by DHS.

plus after running the numbers. No way I could break even on GPU mining. oh well. ended up with a 7950 for ~50 bucks after I sell my gtx570 plus the 20 days or so of 'profit' I made.
 
opfreak said:
dwolla just got shut down for mt.gox payments by DHS.

plus after running the numbers. No way I could break even on GPU mining. oh well. ended up with a 7950 for ~50 bucks after I sell my gtx570 plus the 20 days or so of 'profit' I made.
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That's not good. How are us honest folk supposed to get paid now?
 
kirbyrj said:
That's not good. How are us honest folk supposed to get paid now?
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Either use a different transfer service with Mt.Gox, or use a different exchange.

The exchange I use is Canadian Virtual Exchange, and allows direct depost into bank accounts (Canadian Only), wire transfers, money orders, western union transfers, etc.

Mt.Gox should have more ways to get you the money than just Dwolla. If not, transfer your bitcoins to another US exchange that DOES offer something besides Dwolla.
 
mt gox supports multiple forms of withdrawal and so does btc-e from reading their websites... why does dwolla shutting off gox affect people getting money out?? :confused:
 
visibiliti said:
mt gox supports multiple forms of withdrawal and so does btc-e from reading their websites... why does dwolla shutting off gox affect people getting money out?? :confused:
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It's cheap and easy.

It looks like you can do a direct bank transfer, but with as many times as mtgox gets hacked, I don't know that I'd trust them with my bank info.
 
^ at most places you can set up a secondary account for free and use it just for incoming wire transfers... I have done this in the past for car parts sales to forum members in other countries. once the money is wired in, just move it to your main checking/savings account... There has to be another reason than "it's cheap and easy" ? :confused:

i mean, withdrawal fees for international wire transfer are ~2% on gox (2000jpy ~ $19.45 on max $1,000 withdrawal) and i think 1.5% on btc-e?? that doesn't seem that bad? what was dwolla- 1%?
 
visibiliti said:
^ at most places you can set up a secondary account for free and use it just for incoming wire transfers... I have done this in the past for car parts sales to forum members in other countries. once the money is wired in, just move it to your main checking/savings account... There has to be another reason than "it's cheap and easy" ? :confused:
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Makes sense.

It's "familiar" is probably more accurate. Just like using Paypal instead of Amazon Payments or something like that.

$.25 transaction fees didn't hurt either. International wire transfers can be expensive.
 
Ah, gotcha. I had never used it before, I didn't realize it was only $0.25 transaction fee. That explains it.
 
Got my first full month electric bill mining... $410. ouch!

It's $50 more than expected. Granted, I caved and used the A/C when it went to 95F outside.

fwiw for those on the fence a single 7950 around 1020mhz will produce roughly 1 LTC per day at the ~600 difficulty. The electric cost has averaged out to $0.35-$0.40 to produce 1 LTC (undervolted to 1070mV). memory clocks don't seem to matter beyond 1300mhz. That's a mild o/c, obviously.

If the difficulty keeps increasing, hopefully so does the value. At $2.45 it's nice, but not great.
I will probably just shut the rigs off during the summertime days when it's >90F outside and mine only at night until the fall.
 
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