2 x Sapphire Vapor X 5870s
Ran with no OC at 375 Mh/s
Ran for 1 month costant with no downtime and no heat issues

$400 plus shipping to North America.

On ebay these are going for $250+ per card.

Recently shut down my mining rig after only 1 month of running.  Wife nearly killed me over the power bill... 

2 x Sapphire Vapor X 5870s
Ran with no OC at 375 Mh/s
Ran for 1 month costant with no downtime and no heat issues

$500 including shipping to North America.

I work at a small Canadian computer store and I am trying to convince my boss to overhaul our webstore to include GPUs and accept Bitcoin.  As one of the biggest hurdles Bitcoin faces right now is people NOT spending their coins, I figured this would give everyone a place to spend their BTC directly on computer equipment.

Just wanted to gauge interest before I pushed too hard.

Asus M4ATD88-v Evo /USB3.0
2 x Gigabyte 5870
1 x Gigabyte 6950
1 x PCI to PCIe adapter from Cablesaurus
1 x PCIe 16x to 16x extender

Problem I am having is a standard PCI to PCI bridge driver is not starting up (code 10).

Anyone have any ideas?  I am currently updating the BIOS on the board to see if that helps but I wanted to put this out there to see if there was anything else I should do.

Is now recognizing bitcoin-miner.exe from th GUIminer file as a threat.

My friend has a used (not for mining) Asus 5870 for sale.  I would buy it but have no more room for cards.

Yours for $200or

Pics if you need them.

My rig is running 2 x 5870 cards at 925/625.  Getting 400mh/s.  Problem is that quite frequently one of the cards loses connection.  The other card keeps ticking away and the system is running fine.

Any ideas?

Cant seem to hit that 800mh/s mark.  Right now hitting 775 mh/s consistent.
 
I have the card at 900/600 which is the most MSI Afterburner seems to let me do.  I have tried setting the values and restarting the machine but it wont let me go any furhter.

Flags on GUI Miner -v -w128

Anyone have any ideas or tips?

I am building a system with 2 x 5870s.  Do I need to use a dummy plug or just set them up in Crossfire to hit 800Mh/s?

I have the chance to buy 2 5870s for just under $600.

With the current difficulty, is it profitable to be mining anymore?

Thanks.