Looking for suggestions for cheapest rig for 3 5830s

[Blackout]

I have been away from the bitcoin scene for a while and am trying to get back up to speed.   I have 2 5830s sitting unused in boxes, and one in my main CPU.  I was thinking of what would be the minimal cost to put the 3 5830s in another rig and then buy a Diamond AMD Radeon HD 7970 for my main editing rig since it's around $400 now.

That should produce somewhere around 1.5 to 1.7 ghash correct if tweaked right?  What is that in bitcoins per day / week at the current difficulty and what pools / mining tools are now recommended?

I was using trix to overclock and then mining with aoclbf bitcoin miner before on Elgius.  That was over 6 months ago.

- Blackout

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[crazyates]

3 5830s will only give you ~900MH/s. Anything over 300MH/s per card is typical.

Check out this calculator: http://www.alloscomp.com/bitcoin/calculator.php

Over the next month, expect about 10-11BTCs. Maybe 9-10BTC the month after that.

[wormbog]

I shut my 5830's down a few weeks ago. Too much heat and power cost for the current price/difficulty.

[os2sam]

I shut my 5830's down a few weeks ago. Too much heat and power cost for the current price/difficulty.

Want to sell one?

[zvs]

yeah, it is definitely not 1.5 to 1.7ghash.  i have a cluster of 3 5830's that i run at 1.063v, 915/195 during the day for ~870mhash and if i'm feeling enterprising i'll boost them up to 1.163v, 1000/195 at night for around ~1000mhash.

they are still very profitable vs cost of electricity, if your electricity is 8 cents.     

though, buying a new system & cards vs already having the system & cards are entirely diff matters.

since it seems you already have the mobo & PSU to be able to run 3, if your electricity is under 10c, i'd say it's worth it to get a 3rd.  should be able to get one for around $75-$80.

i wouldn't be in the market for a 7970 at this moment,  seeing as how 7990's launched a few days ago.  why not wait a couple of weeks? 

[os2sam]

yeah, it is definitely not 1.5 to 1.7ghash. 

I think he meant the 3 5830's plus the one 7970.
Sam

[Shadow383]

yeah, it is definitely not 1.5 to 1.7ghash. 

I think he meant the 3 5830's plus the one 7970.
Sam

Yeah that's how I read it too. 1.5Ghash/s is probably a pretty reasonable estimate...

[tynt]

I shut my 5830's down a few weeks ago. Too much heat and power cost for the current price/difficulty.

Doesn't make any sense. If you look the last year then right now it's extremely profitable to mine with GPU.

[mokahless]

My stock voltage 5830@ 1020MHz does 327MH/s under CGminer in linux. 981+ ~650 for the 7970 will get you 1.5-1.7.

For putting the 5830s in a new rig, assuming you can't find used parts, you'll perhaps want to look at something like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131813

with a pcie 1x to 16x extension cable and 2 16x to 16x extension cables. The advantage of getting an AMD APU system is you get those extra few MH/s from the integrated GPU and bumps you up to just over 1GH/s. Don't need much pcie bandwidth. Don't need more than 2GB of ram. Don't cheap out on the PSU.

See here for a lot of network data that can help with how much you will make:
https://docs.google.com/spreadsheet/ccc?key=0AlfvS-7vLyHjdGIyUjdDSFJsT2s5TWdIX3hNcWF5ckE
^the difficulty should change in just under 5 days.

This is my favourite calculator:
http://98.201.170.173:81/btc_calc.php

You can set your system up with BAMT and leave it running. Easy to configure, easy to check stats. I use CGminer under it with my 5830.
http://bamter.org/

The only thing I have found is if I shut the system down, I have to reflash the usb drive and reconfigure because it seems to corrupt itself. But that doesn't take too long and overclocking with CGminer couldn't be easier.