I figured this problem out the other day. My problem was that every so often the drivers for the last card (slot furthest from the cpu) would crash. Try going into the bios on the advanced menu. I cant remember the name of the option but you probably have 64 as what its using. Switch this to 96 and you shouldn't have any problems. Basicly what I took from the explanation on google was 64/16=4 so 96/16=6.

I was having a similar problem as you. I own the same board with 5 5850's. It's not exactly the same as your issue but I had trouble reliably using 5 cards. Each card and component worked individually just not all together. I went into the bios and went to advanced and there should be a option that has 64 as your choice boost it to 96 and that might help you. I don't remember the name of the option but from what I remember is 64/16=4 16 being x16. This fixed my problem and it might fix yours.

If you cant find this option I guess I can reboot my machine to look for it but I prefer not to.

Trixx tends to be more reliable. I have no clue why but I have had problems going below 500 mhz and with trixx that problem does not exists.

This isn't true roi is still in the months category. I'll use my 5850 machine for example. Its a rig with 5 5850's and cost me 1,375 to build. It can generate 1,900 megahash and requires 1kw.

That generates me 1.0750 btc a day which is 290 a month. At 8.5 cents per kwh (cost for me) it costs 61 per month. Which gives me a profit of 229.

Thats 6 months and lets be honest in 6 months the price could easily go up. If you save your coins and wait and at any point it reaches 20 dollars a coin you will have roi in 2.3 months. Keep in mind it only has to hit this once for you to drastically cut your roi.

So like I said roi's don't take years to recover.

To be honest I just didn't think of it lol.

The thread died almost a week ago until some one brought it back up so I assumed I didn't need to. Also is this a new rule? I've never heard this requirement before.

http://bitegg.net/

That site has been around for quite awhile You have no argument for selling them at 700 currently.

I agree they will go out of stock eventualy hence why I stated I bought one and I'm waiting. As for the newegg bit there are trusted websites that convert bitcoins into newegg gift cards so that cuts your 200 dollar profit.

Just remove this for now and wait till its oos like I am. Your only going to get laughed at for trying to sell it early.

Yea I laughed at this as well. I bought one and I'm just waiting for them to go out of stock.

Every time this needs to be explained...

The estimate at the beginning of a new difficulty is not accurate. It takes several days for even a relatively close estimate to come out.

It looks like some one only paid $158 for a 6970 
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127554R

Just pointing out that you need to keep your eyes open. That's a ratio of 2.78

I wouldn't say these are over priced. If these were common cards I'd agree with you but these are cards that pop up in tiny spurts once a month. This is a normal price for this card on ebay.

If your using windows 7 cant you just use windows built in remote desktop?

I'm from the northeast and I agree with you. Once it gets cold enough that my window can be my ac if needed. I will consider adding another machine.

Yea if you need to use this rig don't expect over 300 megahash.

Turns out I have an amazing memory lol

For this to be a realistic build you would need to include some sort of case set up. I couldn't imagine any one being able to build a case for less then 30-40 bucks. Also with two psu's wouldn't you need a dual psu 24-Pin Adapter Cable? That adds a total of 66 dollars between the two items.

In an open case set up you can easily get about 325 from each card with low temps.
The total in this case would be 1,326 and gives you a megahash per dollar of 1.47 which is a bit more accurate

When using new parts I don't think anyone has breached the 1.5 barrier. In the past some one (I think deslok?) mentioned getting ~2.25 but that was with extreme scavenging.

You should be able to underclock to 300. When I had problems with my 5850's (lowest they could go was 500 mem) I reinstalled with the newest drivers and it fixed the majority of my problems. I also use trixx I found that I had stability problems with afterburner.

Try uninstalling and reinstalling your drivers.

My mistake I just tend to assume the worst. Most opinions seem to be negative here. Not many people are very optimistic.