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Need help figuring out electrical usage with small mining farm. Costs/Profit

Today at 09:33:19 AM

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Hi all, This is going to be one mess of a post as it will reflect what is going on in my head. What I am trying to do is get this worked out so I can have the lowest energy usage. I know some of the parts that I have are not the best but, this is what I have on hand.

GPU

2x 5770 (240w) (360mhs)

7x 5830 (980w) (2310mhs)

16x 5850 (2500w) (5760mhs)

1x 5970 (300w) (800mhs)

PSU

1x 650w

4x 700w

1x 800w

2x 850w

all bronze 80+ coolmaster

CPU

1x 555

5x 955

2x i3 2120

Motherboard

2x msi p67a-gd80 (3x 16pci 2x 1pci)

4x msi 870a-g46 (2x 16pci 1x 1pci)

1x asus m4a79xtd evo (2x 16pci 2x 1pci)

1x giabyte ga880ga-ud3h (2x 16pci 2x 1pci)

i have extender cables for the 1xpci and 6 for the 16 pci

Now, since the price has collapsed and the difficulty does not look like its going down (much) I need to get a better idea on what I have here and see if it is wroth putting all together. i am okay to wait a year or so if i am at the break even level now.

My electrical cost after tax is 13.7 cents.

Using the data at this site

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=706&Itemid=72&limit=1&limitstart=16 It seems my total wat usage will be around 4000w just for the cards. This is a guess as I will be overclocking the cards core to whatever I can and underclocking the memory to 300mhz.

my total output will be around 9200 mhs/S assuming i get 180 for the 5770, 330 for the 5830, 360 for the 5850 and 800 for the 5970.

I know that I have electrical costs with the mainboards and the cpus and what not. how significant will this be?

If I assume the next difficulty will be 1,300,000 and the price will be $2.5 and I get 9200 mhs/S I will bring in $540 a month. My costs for electric for just the cards will be $548 If I did all of this right.

I am thinking that there will be no way I can mine and break even at this point. I am however hopeful that it will go up in the future.

I assume that I will be able to have the 2x msi p67a-gd80 motherboards have 5 cards each? (1x 5850 3x 5830 and 1x 5770) and for the second (1x 5850 and 4x5830)

The 1x asus m4a79xtd evo (2x 16pci 2x 1pci) and 1x giabyte ga880ga-ud3h (2x 16pci 2x 1pci) can do 4 each?

And then only use 2 of the 4x msi 870a-g46 (2x 16pci 1x 1pci) with 3 each.

I will have one card left over and two rigs but its the best way to do it right? What will my added electric costs be if I do it this way?

I also have 8 7200 rpm Samsung f3 1TB HDDs and some big house fans to keep things cool.

Also I know I will have to run Linux on some of these machines, Linuxcoin can be run from a HDD as well or only a USB? Thanks.

I do not live in the USA or a part of the world that has Ebay. Getting all this stuff here took a lot of money, a years wage for me. I am not just going to sell everything back at a loss of 40% with out doing some math.

Sorry for all the questions and thoughts but this is where my head is right now. If anyone can follow any of this all ideas and questions are welcomed. Also my numbers might just be way off cuz I dont really know what I'm doing so please point that out too, haha! Thanks:)